You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@nuttx.apache.org by gi...@apache.org on 2020/12/06 21:07:48 UTC
[incubator-nuttx-website] branch asf-site updated: Publishing web:
7177b0e0539c9b86cda96fbfa5284addb26f2cb3 docs:
979a5b7fd4372e362669c6760ba9d06cf5a3c552
This is an automated email from the ASF dual-hosted git repository.
github-bot pushed a commit to branch asf-site
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx-website.git
The following commit(s) were added to refs/heads/asf-site by this push:
new 194d295 Publishing web: 7177b0e0539c9b86cda96fbfa5284addb26f2cb3 docs: 979a5b7fd4372e362669c6760ba9d06cf5a3c552
194d295 is described below
commit 194d295b5495c05af18de57dfbac42fc863194b0
Author: Brennan <ba...@brennanashton.com>
AuthorDate: Sun Dec 6 21:07:06 2020 +0000
Publishing web: 7177b0e0539c9b86cda96fbfa5284addb26f2cb3 docs: 979a5b7fd4372e362669c6760ba9d06cf5a3c552
---
content/README | 9 -
content/docs/10.0.0/index.html | 2 +-
content/docs/latest/index.html | 2 +-
content/download/index.html | 12 +
content/feed.xml | 4 +-
content/releases/10.0.0/index.html | 1880 ++++++++++++++++++++++++++++++++++++
6 files changed, 1896 insertions(+), 13 deletions(-)
diff --git a/content/README b/content/README
deleted file mode 100644
index bebf029..0000000
--- a/content/README
+++ /dev/null
@@ -1,9 +0,0 @@
-Apache Website Template release 0.0.1
-
-This is a source or binary distribution of Apache Website Template.
-
-The LICENSE and NOTICE files contain license information.
-
-README.md explains the purpose of this project, how to generate and
-deploy a simple web site based on this template, and how to create a
-web site for your project based on this template.
diff --git a/content/docs/10.0.0/index.html b/content/docs/10.0.0/index.html
index 9031a38..c679f25 100644
--- a/content/docs/10.0.0/index.html
+++ b/content/docs/10.0.0/index.html
@@ -207,7 +207,7 @@ by following these <a class="reference internal" href="contributing/documentatio
<div class="section" id="nuttx-documentation">
<h1>NuttX Documentation<a class="headerlink" href="#nuttx-documentation" title="Permalink to this headline">¶</a></h1>
<p>NuttX is a real-time operating system (RTOS) with an emphasis on standards compliance and small footprint. Scalable from 8-bit to 32-bit microcontroller environments, the primary governing standards in NuttX are Posix and ANSI standards. Additional standard APIs from Unix and other common RTOS’s (such as VxWorks) are adopted for functionality not available under these standards, or for functionality that is not appropriate for deeply-embedded environments (such as fork()).</p>
-<p>Last Updated: 06 December 20 at 14:01</p>
+<p>Last Updated: 06 December 20 at 21:05</p>
<div class="toctree-wrapper compound">
<p class="caption"><span class="caption-text">Table of Contents</span></p>
<ul class="current">
diff --git a/content/docs/latest/index.html b/content/docs/latest/index.html
index 84fb763..bb51e44 100644
--- a/content/docs/latest/index.html
+++ b/content/docs/latest/index.html
@@ -208,7 +208,7 @@ by following these <a class="reference internal" href="contributing/documentatio
<div class="section" id="nuttx-documentation">
<h1>NuttX Documentation<a class="headerlink" href="#nuttx-documentation" title="Permalink to this headline">¶</a></h1>
<p>NuttX is a real-time operating system (RTOS) with an emphasis on standards compliance and small footprint. Scalable from 8-bit to 64-bit microcontroller environments, the primary governing standards in NuttX are POSIX and ANSI standards. Additional standard APIs from Unix and other common RTOS’s (such as VxWorks) are adopted for functionality not available under these standards, or for functionality that is not appropriate for deeply-embedded environments (such as fork()).</p>
-<p>Last Updated: 06 December 20 at 14:01</p>
+<p>Last Updated: 06 December 20 at 21:05</p>
<div class="toctree-wrapper compound">
<p class="caption"><span class="caption-text">Table of Contents</span></p>
<ul class="current">
diff --git a/content/download/index.html b/content/download/index.html
index b0c745e..a482f6f 100644
--- a/content/download/index.html
+++ b/content/download/index.html
@@ -109,6 +109,18 @@ and another for the integrated Apps.</p>
<tr>
+ <td style="vertical-align: middle; line-height: 2.5em;" class="col-md-1"><a href="/releases/10.0.0/">10.0.0</a></td>
+ <td style="vertical-align: middle;">Release v10.0.0
+</td>
+ <td style="vertical-align: middle;" class="col-md-1 text-right"><a href="https://downloads.apache.org/incubator/nuttx/10.0.0/apache-nuttx-10.0.0-incubating.tar.gz">OS</a>/<a href="https://downloads.apache.org/incubator/nuttx/10.0.0/apache-nuttx-apps-10.0.0-incubating.tar.gz">Apps</a></td>
+ <td style="vertical-align: middle;"><a href="https://downloads.apache.org/incubator/nuttx/10.0.0/apache-nuttx-10.0.0-incubating.tar.gz.sha512">OS</a>/<a href="https://downloads.apache.org/incubator/nuttx/10.0.0/apache-nuttx-apps-10.0.0-incubating.tar.gz.sha512">Apps</a></td>
+ <td style="vertical-align: middle;"><a href="https://downloads.apache.org/incubator/nuttx/10.0.0/apache-nuttx-10.0.0-incubating.tar.gz.asc">OS</a>/<a href="https://downloads.apache.org/incubator/nuttx/10.0.0/apache-nuttx-apps-10.0.0-incubating.tar.gz.asc">Apps</a></td>
+ <td style="vertical-align: middle;" class="col-md-2 text-right">2020-12-03</td>
+ </tr>
+
+
+
+ <tr>
<td style="vertical-align: middle; line-height: 2.5em;" class="col-md-1"><a href="/releases/9.1.0/">9.1.0</a></td>
<td style="vertical-align: middle;">Release v9.1.0
</td>
diff --git a/content/feed.xml b/content/feed.xml
index 1429e47..18e07ca 100644
--- a/content/feed.xml
+++ b/content/feed.xml
@@ -5,8 +5,8 @@
<description></description>
<link>/</link>
<atom:link href="/feed.xml" rel="self" type="application/rss+xml"/>
- <pubDate>Sun, 06 Dec 2020 14:02:58 +0000</pubDate>
- <lastBuildDate>Sun, 06 Dec 2020 14:02:58 +0000</lastBuildDate>
+ <pubDate>Sun, 06 Dec 2020 21:07:04 +0000</pubDate>
+ <lastBuildDate>Sun, 06 Dec 2020 21:07:04 +0000</lastBuildDate>
<generator>Jekyll v3.8.5</generator>
<item>
diff --git a/content/releases/10.0.0/index.html b/content/releases/10.0.0/index.html
new file mode 100644
index 0000000..f55f7c4
--- /dev/null
+++ b/content/releases/10.0.0/index.html
@@ -0,0 +1,1880 @@
+
+
+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <title>10.0.0</title>
+
+ <meta name="author" content="">
+
+ <!-- Enable responsive viewport -->
+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
+
+ <!-- Le HTML5 shim, for IE6-8 support of HTML elements -->
+ <!--[if lt IE 9]>
+ <script src="http://html5shim.googlecode.com/svn/trunk/html5.js"></script>
+ <![endif]-->
+
+ <!-- Le styles -->
+ <link href="/assets/themes/apache/bootstrap/css/bootstrap.css" rel="stylesheet">
+ <link href="/assets/themes/apache/css/style.css?body=1" rel="stylesheet" type="text/css">
+ <link href="/assets/themes/apache/css/syntax.css" rel="stylesheet" type="text/css" media="screen" />
+ <!-- Le fav and touch icons -->
+ <!-- Update these with your own images
+ <link rel="shortcut icon" href="images/favicon.ico">
+ <link rel="apple-touch-icon" href="images/apple-touch-icon.png">
+ <link rel="apple-touch-icon" sizes="72x72" href="images/apple-touch-icon-72x72.png">
+ <link rel="apple-touch-icon" sizes="114x114" href="images/apple-touch-icon-114x114.png">
+ -->
+
+ </head>
+
+ <body>
+
+ <div class="navbar navbar-inverse navbar-fixed-top" role="navigation">
+ <div class="container">
+ <div class="navbar-header">
+ <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
+ <span class="sr-only">Toggle navigation</span>
+ <span class="icon-bar"></span>
+ <span class="icon-bar"></span>
+ <span class="icon-bar"></span>
+ </button>
+ <a class="navbar-brand" href="/">
+ <img src="/assets/themes/apache/img/logo.png" width="30">
+ Apache NuttX
+ </a>
+ </div>
+ <nav class="navbar-collapse collapse" role="navigation">
+ <ul class="nav navbar-nav navbar-right">
+ <li id="community">
+ <a href="#" data-toggle="dropdown" class="dropdown-toggle">Community<b class="caret"></b></a>
+ <ul class="dropdown-menu dropdown-left">
+ <li><a href="/community">Get Involved</a></li>
+ <li><a href="/community-members">Who we are</a></li>
+ </ul>
+ </li>
+ <li><a href="/docs/latest">Documentation</a></li>
+ <li><a href="https://github.com/apache/incubator-nuttx">GitHub</a></li>
+ <li id="apache">
+ <a href="#" data-toggle="dropdown" class="dropdown-toggle">Apache<b class="caret"></b></a>
+ <ul class="dropdown-menu">
+ <li><a href="http://www.apache.org/foundation/how-it-works.html">Apache Software Foundation</a></li>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ <li><a href="http://www.apache.org/events/current-event">Events</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ </ul>
+ </li>
+ </ul>
+ </nav><!--/.navbar-collapse -->
+ </div>
+ </div>
+
+
+
+
+ <div class="container">
+
+
+<!--<div class="hero-unit 10.0.0">
+ <h1></h1>
+</div>
+-->
+
+<div class="row">
+ <div class="col-md-12">
+ <!--
+
+-->
+
+<h1 id="apache-nuttx-1000-release-notes">Apache NuttX-10.0.0 Release Notes</h1>
+<ul id="markdown-toc">
+ <li><a href="#apache-nuttx-1000-release-notes" id="markdown-toc-apache-nuttx-1000-release-notes">Apache NuttX-10.0.0 Release Notes</a> <ul>
+ <li><a href="#major-changes-to-core-os" id="markdown-toc-major-changes-to-core-os">Major Changes to Core OS</a> <ul>
+ <li><a href="#watchdog-callback-argument-change" id="markdown-toc-watchdog-callback-argument-change">Watchdog Callback Argument Change</a></li>
+ <li><a href="#new-features" id="markdown-toc-new-features">New Features</a></li>
+ <li><a href="#bug-fixes" id="markdown-toc-bug-fixes">Bug Fixes</a></li>
+ </ul>
+ </li>
+ <li><a href="#major-changes-to-documentation" id="markdown-toc-major-changes-to-documentation">Major Changes to Documentation</a></li>
+ <li><a href="#major-changes-to-the-build-system" id="markdown-toc-major-changes-to-the-build-system">Major Changes to the Build System</a> <ul>
+ <li><a href="#new-features-1" id="markdown-toc-new-features-1">New Features</a></li>
+ <li><a href="#bug-fixes-1" id="markdown-toc-bug-fixes-1">Bug Fixes</a></li>
+ </ul>
+ </li>
+ <li><a href="#architectural-support" id="markdown-toc-architectural-support">Architectural Support</a> <ul>
+ <li><a href="#new-architecture-support" id="markdown-toc-new-architecture-support">New Architecture Support</a></li>
+ <li><a href="#architectures-with-significant-improvements" id="markdown-toc-architectures-with-significant-improvements">Architectures With Significant Improvements</a> <ul>
+ <li><a href="#cxd56xx" id="markdown-toc-cxd56xx">cxd56xx</a></li>
+ <li><a href="#esp32" id="markdown-toc-esp32">ESP32</a></li>
+ <li><a href="#imxrt" id="markdown-toc-imxrt">IMXRT</a></li>
+ <li><a href="#kinetis" id="markdown-toc-kinetis">Kinetis</a></li>
+ <li><a href="#nrf52" id="markdown-toc-nrf52">NRF52</a></li>
+ <li><a href="#riscv" id="markdown-toc-riscv">RISCV</a></li>
+ <li><a href="#rx65n" id="markdown-toc-rx65n">RX65N</a></li>
+ <li><a href="#samd5e5" id="markdown-toc-samd5e5">SAMD5E5</a></li>
+ <li><a href="#sama5d2" id="markdown-toc-sama5d2">SAMA5D2</a></li>
+ <li><a href="#s32k" id="markdown-toc-s32k">S32K</a></li>
+ <li><a href="#sim" id="markdown-toc-sim">SIM</a></li>
+ <li><a href="#stm32" id="markdown-toc-stm32">STM32</a></li>
+ </ul>
+ </li>
+ <li><a href="#bug-fixes-2" id="markdown-toc-bug-fixes-2">Bug Fixes</a> <ul>
+ <li><a href="#arm" id="markdown-toc-arm">ARM</a></li>
+ <li><a href="#avr" id="markdown-toc-avr">AVR</a></li>
+ <li><a href="#cxd56xx-1" id="markdown-toc-cxd56xx-1">CXD56xx</a></li>
+ <li><a href="#esp32-1" id="markdown-toc-esp32-1">ESP32</a></li>
+ <li><a href="#imxrt-1" id="markdown-toc-imxrt-1">IMXRT</a></li>
+ <li><a href="#kinetis-1" id="markdown-toc-kinetis-1">Kinetis</a></li>
+ <li><a href="#nrf52-1" id="markdown-toc-nrf52-1">NRF52</a></li>
+ <li><a href="#risc-v" id="markdown-toc-risc-v">RISC-V</a></li>
+ <li><a href="#sim-1" id="markdown-toc-sim-1">SIM</a></li>
+ <li><a href="#stm32-1" id="markdown-toc-stm32-1">STM32</a></li>
+ <li><a href="#miscellaneous" id="markdown-toc-miscellaneous">Miscellaneous</a></li>
+ </ul>
+ </li>
+ </ul>
+ </li>
+ <li><a href="#driver-support" id="markdown-toc-driver-support">Driver Support</a> <ul>
+ <li><a href="#bug-fixes-3" id="markdown-toc-bug-fixes-3">Bug Fixes</a></li>
+ <li><a href="#new-driver-support" id="markdown-toc-new-driver-support">New Driver Support</a></li>
+ <li><a href="#drivers-with-significant-improvements" id="markdown-toc-drivers-with-significant-improvements">Drivers With Significant Improvements</a></li>
+ </ul>
+ </li>
+ <li><a href="#board-support" id="markdown-toc-board-support">Board Support</a> <ul>
+ <li><a href="#significant-improvements" id="markdown-toc-significant-improvements"><strong>Significant Improvements</strong></a></li>
+ <li><a href="#new-board-support" id="markdown-toc-new-board-support">New Board Support</a></li>
+ </ul>
+ </li>
+ <li><a href="#file-system" id="markdown-toc-file-system">File System</a> <ul>
+ <li><a href="#bug-fixes-4" id="markdown-toc-bug-fixes-4"><strong>Bug Fixes</strong></a></li>
+ <li><a href="#significant-improvements-1" id="markdown-toc-significant-improvements-1"><strong>Significant Improvements</strong></a></li>
+ </ul>
+ </li>
+ <li><a href="#networking" id="markdown-toc-networking">Networking</a> <ul>
+ <li><a href="#bug-fixes-5" id="markdown-toc-bug-fixes-5"><strong>Bug Fixes</strong></a></li>
+ <li><a href="#significant-improvements-2" id="markdown-toc-significant-improvements-2"><strong>Significant Improvements</strong></a></li>
+ </ul>
+ </li>
+ <li><a href="#applications" id="markdown-toc-applications">Applications</a> <ul>
+ <li><a href="#significant-improvements-3" id="markdown-toc-significant-improvements-3"><strong>Significant Improvements</strong></a></li>
+ <li><a href="#bug-fixes-6" id="markdown-toc-bug-fixes-6">Bug Fixes</a></li>
+ </ul>
+ </li>
+ <li><a href="#security-issues-fixed-in-this-release" id="markdown-toc-security-issues-fixed-in-this-release">Security Issues Fixed In This Release</a></li>
+ <li><a href="#compatibility-concerns" id="markdown-toc-compatibility-concerns">Compatibility Concerns</a></li>
+ <li><a href="#changes-to-build-system" id="markdown-toc-changes-to-build-system">Changes to Build System</a> <ul>
+ <li><a href="#in-apps-change-topdir-to-appdir" id="markdown-toc-in-apps-change-topdir-to-appdir">In Apps, Change <code class="highlighter-rouge">$(TOPDIR)</code> to <code class="highlighter-rouge">$(APPDIR)</code></a></li>
+ <li><a href="#custom-boards-dont-need-archincludes-and-archxxincludes-definitions" id="markdown-toc-custom-boards-dont-need-archincludes-and-archxxincludes-definitions">Custom Boards Don’t Need <code class="highlighter-rouge">ARCHINCLUDES</code> and <code class="highlighter-rouge">ARCHXXINCLUDES</code> Definitions</a></li>
+ <li><a href="#custom-boards-dont-need-hostcc-and-hostcflags-definitions" id="markdown-toc-custom-boards-dont-need-hostcc-and-hostcflags-definitions">Custom Boards Don’t Need <code class="highlighter-rouge">HOSTCC</code> and <code class="highlighter-rouge">HOSTCFLAGS</code> Definitions</a></li>
+ <li><a href="#removal-of-unused-archccversion-and-archccmajor" id="markdown-toc-removal-of-unused-archccversion-and-archccmajor">Removal of Unused <code class="highlighter-rouge">ARCHCCVERSION</code> and <code class="highlighter-rouge">ARCHCCMAJOR</code></a></li>
+ <li><a href="#custom-boards-may-not-need-extra_libs-and-extra_libpaths-definitions" id="markdown-toc-custom-boards-may-not-need-extra_libs-and-extra_libpaths-definitions">Custom Boards May Not Need <code class="highlighter-rouge">EXTRA_LIBS</code> and <code class="highlighter-rouge">EXTRA_LIBPATHS</code> Definitions</a></li>
+ <li><a href="#custom-boards-may-not-need-cc-cxx-cpp-ld-strip-ar-nm-objcopy-and" id="markdown-toc-custom-boards-may-not-need-cc-cxx-cpp-ld-strip-ar-nm-objcopy-and">Custom Boards May Not Need CC, CXX, CPP, LD, STRIP, AR, NM, OBJCOPY, and</a></li>
+ <li><a href="#consolidated-arcrossdev-and-crossdev" id="markdown-toc-consolidated-arcrossdev-and-crossdev">Consolidated ARCROSSDEV and CROSSDEV</a></li>
+ </ul>
+ </li>
+ </ul>
+ </li>
+</ul>
+
+<h2 id="major-changes-to-core-os">Major Changes to Core OS</h2>
+<h3 id="watchdog-callback-argument-change">Watchdog Callback Argument Change</h3>
+<p>The wdog timer call backs used to support a variable number of arguments.
+Now they support only a single argument (<a href="https://github.com/apache/incubator-nuttx/pull/1565">PR
+#1565</a>). This eliminates
+(1) the configuration option <code class="highlighter-rouge">CONFIG_MAX_WDOGPARMS</code> and the OS interfaces
+<code class="highlighter-rouge">wd_create()</code> and <code class="highlighter-rouge">wd_delete()</code> * wdog timer data structures are no longer
+pre-allocated. Now they are allocated by the caller of <code class="highlighter-rouge">wd_start()</code>. This (1)
+eliminates the configuration options <code class="highlighter-rouge">CONFIG_PREALLOC_WDOGS</code> and
+<code class="highlighter-rouge">CONFIG_WDOG_INTRESERVE</code>, (2) eliminates the type <code class="highlighter-rouge">WDOG_ID</code> which was a pointer
+type to <code class="highlighter-rouge">struct wdog_s</code>, and (3) change the type of the first argument of all
+remaining wdog interfaces functions from <code class="highlighter-rouge">WDOG_ID</code> to <code class="highlighter-rouge">FAR struct wdog_s *</code>.</p>
+
+<p>Because of these changes, all proprietary drivers maintained by all NuttX users
+will require modification. The following summaries the required modifications:</p>
+
+<p>Most drivers have a field in structure like <code class="highlighter-rouge">WDOG_ID wdog</code>; That must be
+ changed to <code class="highlighter-rouge">struct wdog_s wdog</code>; That changes the field from a pointer to a
+ <code class="highlighter-rouge">struct wdog_s</code> to the <code class="highlighter-rouge">struct wdog_s</code> storage itself. * Eliminate all calls
+ to <code class="highlighter-rouge">wd_create()</code>. The <code class="highlighter-rouge">WDOG_ID</code> is not longer managed by the timing subsystem
+ and the <code class="highlighter-rouge">wd_create()</code> interface has been removed. * The <code class="highlighter-rouge">wd_delete()</code>
+ interface has also been removed, but more care will need to be exercised:
+ <code class="highlighter-rouge">wd_delete()</code> also cancels any running timer so, in many case, calls to
+ <code class="highlighter-rouge">wd_delete()</code> should be replaced with calls to <code class="highlighter-rouge">wd_cancel()</code>. If you are certain
+ that the timer has never been started, then you must remove the call to
+ <code class="highlighter-rouge">wd_delete()</code> altogether. Calling <code class="highlighter-rouge">wd_cancel()</code> with an un-initialized s<code class="highlighter-rouge">truct
+ wdog_s</code> instance may well cause a fatal crash. * Replace the first parameter
+ of all remaining wdog function calls from. For example, replace a call like <code class="highlighter-rouge">ret
+ = wd_cancel(priv->wdog)</code> where <code class="highlighter-rouge">priv->wdog</code> was type <code class="highlighter-rouge">WDOG_ID</code> with the call
+ <code class="highlighter-rouge">ret = wd_cancel(&priv->wdog)</code>where <code class="highlighter-rouge">priv->wdog</code> is now type <code class="highlighter-rouge">struct wdog_s</code>.</p>
+
+<h3 id="new-features">New Features</h3>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1877">PR-1877</a> libc:
+ Implement “j” modifier for scanf</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1864">PR-1864</a> libc: fs: Add
+ relative path support</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1863">PR-1863</a> libc:
+ Implement <code class="highlighter-rouge">access()</code></p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1866">PR-1866</a> libc: uio:
+ enable <code class="highlighter-rouge">writev()</code> for sockets</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1853">PR-1853</a> libc:
+ Implement <code class="highlighter-rouge">popcount/popcountl/popcountll</code></p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1850">PR-1850</a> Add tool for
+ parsing the callstack for Trace32</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1840">PR-1840</a> Add POLLPRI
+ for exception condition on the file descriptor</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1828">PR-1828</a> Implement
+ mkdtemp syscall</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1826">PR-1826</a> libc: Add
+ “tm_zone” member to tm</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1824">PR-1824</a> Implement
+ etpriority syscall</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1821">PR-1821</a> Implement
+ gettid syscall</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1818">PR-1818</a> Implement
+ pipe2 syscall</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1779">PR-1779</a> libc: Minimal
+ umask implementation</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1758">PR-1758</a> mm: Add lock
+ to protect call to mm_addregion</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1756">PR-1756</a> libc:
+ Implement gethrtime, getrlimit, setrlimit</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1658">PR-1658</a> libc: Add
+ stubs for utimes</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1615">PR-1615</a> libc:
+ Implement tm::tm_gmtoff field</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1611">PR-1611</a> libc: Allocate
+ file_struct dynamically</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1684">PR-1684</a> Add gdb script
+ for NuttX thread debugging</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1607">PR-1607</a> mm: Implement
+ malloc_usable_size</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1606">PR-1606</a> sched/pthread:
+ Implement pthread_attr_detachstate</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1600">PR-1600</a> Implement
+ epol_pwait and EPOLLONESHOT flag</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1597">PR-1597</a> sched: Support
+ passing non empty argument to init task</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1596">PR-1596</a> libc: Replace
+ all sem_xxx with _SEM_XXX. This insures the correct semaphore interface is
+ used by userspace and the kernel.</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1517">PR-1517</a> sched/wdog:
+ Change the default value of MAX_WDOGPARMS from 4 to 2 as wd_start is two every
+ where in the code base. Also bump CONFIG_MAX_WDOGPARAMS from 1 to 2 in
+ defconfigs to support pthread_condclockwait()</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1486">PR-1486</a> libc:
+ Implement ftw and nftw functions</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1567">PR-1567</a> libc:
+ Implement proposed POSIX _clockwait variants of _timedwait functions</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1411">PR-1411</a> libxx:
+ Integrate latest uclibcxx 0.2.5</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1586">PR-1586</a> libc: Add open
+ for text (translated) access support</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1584">PR-1584</a> libc:
+ Implement strlcpy function</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1580">PR-1580</a> libc:
+ Implement pthread_conattr_etclock</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1545">PR-1545</a> sched/wdog: Do
+ not dynamically allocate wdog_s. Reduces overhead and brings it inline with
+ work_s</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1534">PR-1534</a> sched/wdog:
+ Replace all callback arguments from uint32_t to wdparm_t</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1420">PR-1420</a> libc: Do not
+ define localtime[_r] to macro with CONFIG_LIBC_LOCALTIME is not defined.</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1375">PR-1375</a> libc: Always
+ declare getenv, link/symlink and atexist/on_exit. Many C++ libraries reference
+ these but dont use them</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1371">PR-1371</a> libc: Improve
+ stat/readdir to be more POSIX compliant with S_xxx macro definition as with
+ Linux</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1369">PR-1369</a> Initialize the
+ idle stack at the arch layer to better support stack coloring and also make it
+ compatible with new TLS implementation</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1292">PR-1292</a> pthread/mutex:
+ Add PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP support</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1280">PR-1280</a> libc:
+ Implement fseeko and ftello</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1279">PR-1279</a> libc:
+ Implement lstat and realpath</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1278">PR-1278</a> libc:
+ Implement pathconf and fpathconf</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1269">PR-1269</a> cstdlib: Add
+ missing atox to std namespace</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1264">PR-1264</a> sched/pthread:
+ Prohibit the use of pthread_cleanup API’s by kernel threads</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1440">PR-1440</a> libc: Add the
+ UUID libc functions</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1308">PR-1308</a> libc: Add
+ support for _SC_NPROCESSORS_CONF/_SC_NPROCESSORS_ONLN to sysconf</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1305">PR-1305</a> libc:
+ Implement WNOHANG for waitpid and waitid</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1237">PR-1237</a> libc: Add
+ minimal support for locale_t operation: suplocale, freelocale, newlocale,
+ userlocale</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1317">PR-1317</a> sched/task:
+ Unify task initialization</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1187">PR-1187</a> sched: Unify
+ main thread and pthread behavior</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/2263">PR-2263</a> libc/stdio:
+ Preallocate stdin, stdout, stderr</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/2053">PR-2053</a> / <a href="https://github.com/apache/incubator-nuttx/pull/2040">PR-2040</a> serial/termios:
+ Support custom baudrate setting</p>
+ </li>
+</ul>
+
+<h3 id="bug-fixes">Bug Fixes</h3>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1911">PR-1911</a> init_section
+ was not being emitted resulting in C++ static constructors not being called.</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1889">PR-1889</a> Fix build
+ error for ::setbuf if CONFIG_STDIO_DISABLE_BUFFERING is set</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1619">PR-1619</a> Fix inverted
+ errno in mq_open</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1595">PR-1595</a> epoll_wait()
+ must loop until “maxevents” to fille output evs array</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1519">PR-1519</a> libc: Replace
+ index/rindex from macro to function to protect against side effects with
+ conflicting local variables</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1514">PR-1514</a> Remove usage
+ for user-space memalign() from kernel/driver code. Instead use the proper
+ kernel memory interface.</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1512">PR-1512</a> /
+ <a href="https://github.com/apache/incubator-nuttx/pull/1510">PR-1510</a> /
+ <a href="https://github.com/apache/incubator-nuttx/pull/1507">PR-1507</a> Remove usage for
+ user-space malloc()/zalloc()/free() from kernel/driver code. Instead use the
+ proper kernel memory interface.</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1496">PR-1496</a> libc: Change
+ ctype macro to normal function to resolve macro evaluation side effects</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/146">PR-1463</a> libc: Replace
+ all malloc/free with lib_malloc/lib_free inside libc</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1365">PR-1365</a> up_assert
+ should not call exit() directly because it is only callable from userspace</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1336">PR-1336</a> syscall: Fix
+ prctl PR_SET_NAME failure if called without pid argument</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1289">PR-1289</a> Clear the
+ error indicator with rewind()</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1254">PR-1254</a> libc: mkstemp
+ only look at the trailing X’s instead of the first X</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1311">PR-1311</a> libc: Move
+ double_t typedef from sys/types.h to math.h</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1328">PR-1328</a> Make sure that
+ pthread_cleanup functions are only called from userspace</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1318">PR-1318</a>
+ nxsched_release_tcb should release stack in kernel build, fixes memory leak</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/2951">PR-2951</a> sched: Fix
+ deadlock in nxtask_exit() for SMP</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pulls/2229">PR-2229</a> /
+ <a href="https://github.com/apache/incubator-nuttx/pulls/2298">PR-2298</a> /
+ <a href="https://github.com/apache/incubator-nuttx/pulls/2279">PR-2279</a> /
+ <a href="https://github.com/apache/incubator-nuttx/pulls/2272">PR-2272</a> /
+ <a href="https://github.com/apache/incubator-nuttx/pulls/2264">PR-2264</a> /
+ <a href="https://github.com/apache/incubator-nuttx/pulls/1992">PR-1992</a> /
+ <a href="https://github.com/apache/incubator-nuttx/pulls/2022">PR-2022</a> sched: SMP
+ fixups that caused locking and removal of some no longer required workarounds</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1993">PR-1993</a> libc: Skip
+ close stdin/stdout/stderr in fclose</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1997">PR-1997</a> libc: Remove
+ all calls to fclose with stdin/stdout/stderr with fclose</p>
+ </li>
+</ul>
+
+<h2 id="major-changes-to-documentation">Major Changes to Documentation</h2>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pulls/1763">PR-1763</a> Add
+ quickstart documentation</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1677">PR-1677</a> Add simulator,
+ drivers, and contributing instructions for new users</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1675">PR-1675</a> Add quickstart
+ documentation from NuttX Companion</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1673">PR-1673</a> Update all the
+ links in the documentation to point to nuttx.apache.org or the Apache NuttX
+ wiki instead of old nuttx.org resources</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1501">PR-1501</a> Port all the
+ existing documentation from HTML files to Sphinx based documentation along with
+ a bunch of updates and improvments</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1433">PR-1433</a> Convert README
+ documentation to Markdown</p>
+ </li>
+</ul>
+
+<h2 id="major-changes-to-the-build-system">Major Changes to the Build System</h2>
+
+<h3 id="new-features-1">New Features</h3>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1786">PR-1786</a> Support
+ building external code into the OS</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1396">PR-1396</a> Make C/C++
+ search path common so all boards support uClibc++/libc++ automatically</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1682">PR-1682</a> configure.sh
+ can now list configurations with “-L” option</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/2023">PR-2023</a> tools: Remove
+ WSL configuration. This is just Linux now.</p>
+ </li>
+</ul>
+
+<h3 id="bug-fixes-1">Bug Fixes</h3>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1713">PR-1713</a> Fix export
+ target: libboard was missing KERNEL flag.</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1470">PR-1470</a> Fix Make.dep
+ not updated by .config changes</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1786">PR-1345</a> Enhance export
+ target: make BIN directory configurable, export post build script, use LDNAME
+ instead of LDSCRIPT</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1332">PR-1332</a> Include
+ incdir.c in the export target</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1995">PR-1995</a> Fix issue
+ where wrong extension was generated for mkconfig in WSL builds</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1949">PR-1949</a> Fix issue in
+ make export where nuttx-names.dat was not being generated</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1682">PR-1682</a>: Fix issue
+ where windows style paths might not be handled correctly breaking Cygwin builds</p>
+ </li>
+</ul>
+
+<h2 id="architectural-support">Architectural Support</h2>
+
+<h3 id="new-architecture-support">New Architecture Support</h3>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1847">PR-1847</a> ARM: Initial
+ support for ARMV6M to support CortexM0+</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1379">PR-1397</a>: EOSS3:
+ Initial support for the QuickLogic EOS S3 SoC</p>
+ </li>
+</ul>
+
+<h3 id="architectures-with-significant-improvements">Architectures With Significant Improvements</h3>
+
+<h4 id="cxd56xx">cxd56xx</h4>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1753">PR-1753</a> cxd56xx: Use
+ spinlock in gpioint to improve SMP performance</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1650">PR-1650</a> cxd56xx: Use
+ spinlock in rtc to improve SMP performance</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1621">PR-1621</a> cxd56xx: Use
+ spinlock in serial to improve SMP performance</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1569">PR-1569</a> cxd56xx: Add
+ SMP support to cxd56_farapi.c</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1689">PR-1689</a> cxd56xx: Use
+ spinlock in uart to improve SMP performance</p>
+ </li>
+</ul>
+
+<h4 id="esp32">ESP32</h4>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1422">PR-1422</a> ESP32: Add SPI
+ driver (Master & Slave)</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1435">PR-1435</a> ESP32: Add I2C
+ driver</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1491">PR-1491</a> ESP32: Add SPI
+ Flash driver</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1525">PR-1525</a> ESP32: Add
+ Ethernet driver</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1610">PR-1610</a> ESP32: Improve
+ SPI transmision (DMA, IOMUX, software CS)</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1630">PR-1630</a> ESP32: Add
+ support for HW RNG</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1830">PR-1830</a> ESP32: Add
+ Power Management of Force-Sleep</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1754">PR-1754</a> ESP32: Add
+ support for external SPIFLASH</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1613">PR-1613</a> ESP32: Add
+ function for switching CPU from 80MHz to 240MHz</p>
+ </li>
+</ul>
+
+<p>PR-1712 ESP32: Add support for external MMCSD card over SPI</p>
+
+<h4 id="imxrt">IMXRT</h4>
+
+<ul>
+ <li><a href="https://github.com/apache/incubator-nuttx/pull/1868">PR-1868</a> IMXRT: Add ADC
+ driver</li>
+</ul>
+
+<h4 id="kinetis">Kinetis</h4>
+
+<ul>
+ <li><a href="https://github.com/apache/incubator-nuttx/pull/1624">PR-1624</a> Kinetis:
+ USBHOST improvements to avoid race condition durring freeing for queue head
+ structure by using Async Advance Doorbell.</li>
+</ul>
+
+<p>PR-1516 Kinetis K28: Add support for USB High Speed Host</p>
+
+<p>PR-1531 Kinetis K28: Add USB state change notifiers in notifier work queue</p>
+
+<p>PR-1456 Kinetis K28: Reworked USB driver for setup out data phase</p>
+
+<h4 id="nrf52">NRF52</h4>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1418">PR-1418</a> NRF52: Add
+ Timer and RTC drivers</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1422">PR-1432</a> NRF52: Add
+ timer lowerhalf</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1635">PR-1635</a> NRF52: Add
+ support for RTC event handling</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1636">PR-1636</a> NRF52: Add
+ support for PPI peripheral</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1681">PR-1681</a> NRF52: Add
+ support for GPIOTE task mode</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1726">PR-1726</a> NRF52: Extend
+ systimer support</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1773">PR-1773</a> NRF52: Add ADC
+ and PWM support</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1915">PR-1915</a> NRF52: Add
+ serial termios support (no flow control)</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1907">PR-1907</a> NRF52: Add
+ basic error handing for i2c in polling mode to support i2ctool. Still not
+ handled in DMA mode.</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1839">PR-1839</a> NRF52: Add
+ missing SPI callback register hooks to support drivers like mmcsd</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1646">PR-1646</a> NRF52: Better
+ differentiation between NRF52840 and NRF52832</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1685">PR-1685</a> NRF52: Add ARM system reset support. Add UID support.</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1674">PR-1674</a> NRF52: Add LFCLK/HFCLK support for selecting oscillator sources.</p>
+ </li>
+</ul>
+
+<h4 id="riscv">RISCV</h4>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1858">PR-1858</a> RISCV: Add
+ missing CSR macros listed in RISC-V spec V1.10.</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1314">PR-1314</a> rv32im: Add schedulesigaction.c, SYS_save_context handling, skip ECALL
+instruction when calling up_swint()</p>
+ </li>
+</ul>
+
+<h4 id="rx65n">RX65N</h4>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1622">PR-1622</a> RX65N: Add
+ I2C(RIIC) support</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1894">PR-1894</a> RX65N: Add USB
+ device support</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1899">PR-1899</a> RX65N: Add DTC
+ driver</p>
+ </li>
+</ul>
+
+<p>PR-1910 RX65N: Add SPI driver support</p>
+
+<h4 id="samd5e5">SAMD5E5</h4>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1515">PR-1515</a> SAMD5E5: Add
+ Watchdog timer support</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1574">PR-1574</a> SAMD5E5: Add
+ USB host support</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1594">PR-1594</a> SAMD5E5:
+ Freerun timer, oneshot timer and tickless support</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1816">PR-1816</a> SAMD5E5: Add
+ MTD progmem support and NVM USER PAGE IOTCLs</p>
+ </li>
+</ul>
+
+<h4 id="sama5d2">SAMA5D2</h4>
+
+<p>PR-1412 SAMA5D27: Implement system reset to support nsh reboot command</p>
+
+<p>PR-1393 SAMA5D2x: Implement SDMMC peripheral support</p>
+
+<h4 id="s32k">S32K</h4>
+
+<p>PR-1339 S32K: Extend FlexTimer support and add support for PWM</p>
+
+<p>PR-1337 S32K: Allow FlexCAN to use to NETDEV_LATEINIT to handle the case where
+both FlexCAN and ENET are used</p>
+
+<h4 id="sim">SIM</h4>
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1914">PR-1914</a> SIM: SIGUSR1
+ handling now uses NuttX interrupt logic</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1859">PR-1859</a> ESIM: Add
+ host timer and improve the oneshot timer logic</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1767">PR-1767</a> SIM: Allow
+ access to tty interfaces for better termios support</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1655">PR-1655</a> SIM: Add
+ support for Linux HCI Socket as a NuttX BLE adapter. Full NuttX BLE stack can
+ be run against any Linux Bluetooth adapter in sim.</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1558">PR-1558</a> SIM: Add
+ support for Stack Smashing Protector.</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1392">PR-1392</a> SIM: Make
+ uClibc++ and libcxx work on sim platform</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1460">PR-1460</a> SIM: Call
+ sched_note_cpu_* when scheduler instrumentation is enabled</p>
+ </li>
+</ul>
+
+<h4 id="stm32">STM32</h4>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1865">PR-1865</a> STM32F4: Add
+ support for STM32F412CE fixing I2C2/I2C3 and USART1 alt</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1506">PR-1506</a> STM32: Add
+ support for single wire UART push/pull mode</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1572">PR-1572</a> STM32F2/F4:
+ Add options for I-Cache and D-Cache to be enabled/disable. Previously they were
+ always enabled.</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1286">PR-1287</a> STM32F7:
+ Refactor the FMC driver to support STM32F7 family and add support to the
+ STM32F46G-DISCO board</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1275">PR-1275</a> STM32: Allow
+ SysTick to be a tickless clock source option</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1268">PR-1268</a> STM32: Add
+ support for STM32F412 with UART / SPI / CAN / I2C / DMA</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1250">PR-1250</a> STM32L4: Add
+ support for booting into DFU mode</p>
+ </li>
+</ul>
+
+<h3 id="bug-fixes-2">Bug Fixes</h3>
+
+<h4 id="arm">ARM</h4>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1562">PR-1562</a> ARM: Save
+ tcb-adj_stack_size should be saved without tls overhead</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1900">PR-1900</a> ARM: Fix false
+ reporting for stack usage for unaligned stacks</p>
+ </li>
+</ul>
+
+<h4 id="avr">AVR</h4>
+
+<ul>
+ <li><a href="https://github.com/apache/incubator-nuttx/pull/1410">PR-1410</a> avr: Implement
+ missing double_t type, CONFIG_STACK_ALIGNMENT, linker emulation flags</li>
+</ul>
+
+<h4 id="cxd56xx-1">CXD56xx</h4>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1930">PR-1930</a> cxd56xx: Fix
+ handle_irqreq() in cxd56_cpupause.c</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1789">PR-1789</a> cxd56xx: Fix
+ deadlock issue in up_txinit() in SMP mode.</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1620">PR-1620</a> cxd56xx: Fix
+ IRQ control in cxd56_dmac.c</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1253">PR-1253</a> cxd56xx: Fix
+ audio cxd56_stop where a deadlock could be hit if the worker thread took too
+ long to turn on AMP</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1950">PR-1950</a> cxd56xx: Fix
+ deadlock and tcb corruption in SMP mode</p>
+ </li>
+</ul>
+
+<h4 id="esp32-1">ESP32</h4>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1908">PR-1908</a> ESP32: Fix
+ task signal process preemption</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1941">PR-1941</a> ESP32: Fix
+ interrupt clearing of edge interrupt due to issuing in masking interrupt state</p>
+ </li>
+</ul>
+
+<h4 id="imxrt-1">IMXRT</h4>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1527">PR-1527</a> IMXRT: Fix
+ kconfig so that IMXRT_ENET_NRXBUFFERS can be set</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1455">PR-1455</a> IMXRT: Fix
+ auto-negotiation for KSZ8081 PHY</p>
+ </li>
+</ul>
+
+<h4 id="kinetis-1">Kinetis</h4>
+
+<ul>
+ <li><a href="https://github.com/apache/incubator-nuttx/pull/1273">PR-1273</a> Kinetis: Fix
+ issue in ethernet driver where buffers were blindly initialized and could cause
+ the TX of the MAC to be in a bad state. Also resolves an issue with interrupts
+ being throttled in the NVIC.</li>
+</ul>
+
+<h4 id="nrf52-1">NRF52</h4>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1928">PR-1928</a> NRF52: Fix PPI
+ group disable and add group clear</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1885">PR-1885</a> NRF52: Fix SPI
+ driver structures when SPI_EXCHANGE is not set</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1799">PR-1799</a> NRF52: Fix
+ SPI_MASTER entry in kconfig</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1787">PR-1787</a> NRF52: Fix
+ base address for SPIM{1,2,3}</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1777">PR-1777</a> NRF52: Handle
+ case where rx or tx buffer could be 0 but data would still be transferred. Also
+ error if more than max data is requested.</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1770">PR-1770</a> NRF52: Fix bug
+ where SPI cmddata was not properly mapped for SPIM 0,2,3</p>
+ </li>
+</ul>
+
+<h4 id="risc-v">RISC-V</h4>
+
+<ul>
+ <li><a href="https://github.com/apache/incubator-nuttx/pull/1909">PR-1909</a> RISC-V: MIE
+ instead of MPIE register was being used in up_schedule_sigaction for storing
+ interrupt state</li>
+</ul>
+
+<h4 id="sim-1">SIM</h4>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1903">PR-1903</a> SIM: Fix
+ complication issue for WPCAP in Cygwin build</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1888">PR-1888</a> SIM: Fix
+ EOVERFLOW returned when CONFIG_SIM_M32 is set</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1709">PR-1709</a> SIM: Fix
+ up_cpu_start initialization for macOS with SMP enabled</p>
+ </li>
+</ul>
+
+<h4 id="stm32-1">STM32</h4>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1898">PR-1898</a> STM32F7: Fixes
+ data loss bug in UART5 with TX DMA</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1841">PR-1841</a> STM32: Remove
+ broken overdriver support</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1719">PR-1719</a> STM32:
+ Lowputc: Ensure USART is disabled before attempting to configuring it</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1714">PR-1714</a> STM32H7: Fix
+ I2C driver interrupt storm</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1556">PR-1556</a> STM32: Fix IO
+ compentation support in STM32F7 and remove incorrect reference in STM32F0/L0/G0</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1529">PR-1529</a> STM32: Fix
+ initialization bug in ADC that prevented adc_reset() from working correctly</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1561">PR-1561</a> STM32: Make
+ sure that core over-drive is enabled for all chips that support it and operating
+ at 180MHz. Some were enabled at 180MHz but may have not been stable without
+ over-drive not configured.</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1553">PR-1553</a> STM32F7: Fix
+ possible interrupt blocking in serial TXDMA ISR</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1544">PR-1544</a> STM32: Make
+ sure IO compensation cell is configured prior to call to
+ rcc_enableperipherals() causing syscfg is accessed before it is enabled</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1380">PR-1380</a> STM32F7: Fix
+ tickless driver where th compare register could be set to a value that has
+ just passed preventing expiration</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1252">PR-1252</a> STM32L4: Fix
+ 48MHz MSI clock selection that could cause boot to hang</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1310">PR-1310</a> STM32L4:
+ Configure flash wait states earlier to prevent corruption of execution state</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1248">PR-1248</a> STM32L4: Fix
+ oneshot timer so that a minimum period is set otherwise it will never be
+ triggered.</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1247">PR-1247</a> STM32L47x/8x:
+ Set additional registers required to place a pin in analog mode</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1246">PR-1246</a> STM32L4: Fix
+ issue where clock divider for serial baud rate was not set correctly</p>
+ </li>
+</ul>
+
+<h4 id="miscellaneous">Miscellaneous</h4>
+
+<ul>
+ <li><a href="https://github.com/apache/incubator-nuttx/pull/1912">PR-1912</a> Fix
+ up_interrupt_contex() in case of SMP - Make sure the operation is atomic in
+ case of SMP</li>
+</ul>
+
+<h2 id="driver-support">Driver Support</h2>
+
+<h3 id="bug-fixes-3">Bug Fixes</h3>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1896">PR-1896</a> spi_xx25xx
+ EEPROM: return the number of bytes written instead of 0 or error</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1891">PR-1891</a> serial: Don’t
+ mangle PID when ISIG is changed</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1856">PR-1856</a> pipe: In case
+ of empty pipe with no writers, return EOF instead of EAGAIN</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1836">PR-1836</a> stmpe811: Fix
+ incorrect GPIO interrupt register logic</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1741">PR-1741</a> mmcsd_sdio:
+ Properly arm the write completion detection</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1370">PR-1370</a> can: Fix
+ incorrect usage of nxsem_getvalue which caused fifo->rx_sem to increase with
+ teach received msg</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1452">PR-1452</a> lcd: Fix
+ memory leak when board_graphics_setup fail</p>
+ </li>
+</ul>
+
+<h3 id="new-driver-support">New Driver Support</h3>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1797">PR-1797</a> leds: WS2812
+ LED controller (aka Adafruit NeoPixel)</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1851">PR-1851</a> kbd: Add
+ support for SolderParty BlackBerry Q10 Keyboard</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1618">PR-1618</a> BQ27426 fuel
+ gauge</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1276">PR-1276</a> Add support
+ for the ST7735 TFT Controller</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1233">PR-1233</a> usbhost: Add
+ support for CDC-MBIM USB host driver</p>
+ </li>
+</ul>
+
+<h3 id="drivers-with-significant-improvements">Drivers With Significant Improvements</h3>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1816">PR-1816</a> stmpe811: Add
+ SPI support for touch screen controller</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1800">PR-1800</a> vfs: Add
+ <code class="highlighter-rouge">FIOCLEX/FIONCLEX</code> ioctl support</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1798">PR-1798</a> mmcsd: Allow
+ setting <code class="highlighter-rouge">IDMODE_CLOCK</code> via kconfig</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1587">PR-1587</a> BCH: Delay the
+ sector flush to avoid multiple erase/write operations in sequence write</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1577">PR-1577</a> rwbuffer:
+ Avoid allocating memory for the temporary erase buffer by the FTL driver</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1466">PR-1466</a> Altair Modem:
+ Add board specific logic, Fix issue that SPI4 RX frequency violated AC Spec,
+ Fix priority of SPI transfer task is too low, Modify timeout value for RX ready</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1471">PR-1471</a> ramlog: Add
+ option to overwrite buffer</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1547">PR-1547</a> usbhub: Make
+ sure to enumerate hubs that report protocol = 1 (High Speed Hub)</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1374">PR-1374</a> gpio: Extend
+ gpio_pintype_e for pulldown/up and opendrain</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1249">PR-1249</a> bmp280: Add
+ support for reading temperature</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1299">PR-1299</a> mpu60x0: Add
+ I2C support for the MPU60x0 sensor driver</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1325">PR-1325</a> can: expose
+ NART/ABOM and RTR settings via ioctls</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1520">PR-1520</a> note: Move
+ note driver from syslog to drivers/note</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1288">PR-1288</a> / PR-1449
+ note: Add sched_note_syscall_enter/leave hooks for syscall instrumentation</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1259">PR-1259</a> note: Add
+ buffering support for syscall instrumentation</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1256">PR-1256</a> note: Add
+ hooks for note driver for interrupt instrumentation</p>
+ </li>
+</ul>
+
+<h2 id="board-support">Board Support</h2>
+
+<h3 id="significant-improvements"><strong>Significant Improvements</strong></h3>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1618">PR-1618</a> metro-m4: Add
+ support for: SmartFS initialization, AT24 EEPROM, GPIO dev, BQ27426 gauge
+ initialization</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1729">PR-1727</a> b-g474e-dpow1:
+ Add support for FLASH bootloader</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1683">PR-1683</a> cxd56xx: Add
+ wifi_smp configuration</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1668">PR-1668</a> sim: Add new
+ configuration for SMP</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1644">PR-1644</a>
+ stm32f746g-disco: Move serial console from USART6 to USART1 which is attached
+ to the USB virtual COM port.</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1464">PR-1464</a> cxd56xx: Add
+ new GNSS functions, support for lower PWM frequency,
+ CONFIG_CPUFREQ_RELEASE_LOCK, high speed ADC, HPADC input gain configuration,
+ eMMC device, frame buffer support</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1405">PR-1405</a>
+ stm32f4discovery: Add ELF support to wifi configuration</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1402">PR-1402</a> imxrt1060: Add
+ buttons support to iMXRT1060</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1590">PR-1590</a> sim: Add
+ duktape configuration</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1532">PR-1532</a> sim: Add
+ cromfs configuration</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1335">PR-1335</a> cxd56xx:
+ Enable basic snapshop camera example</p>
+ </li>
+</ul>
+
+<h3 id="new-board-support">New Board Support</h3>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1664">PR-1664</a> NRF52: Add
+ support for NRF52832 MakerDiary MDK board</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1633">PR-1633</a> NRF52: Add
+ support for Sparkfun NRF52832 Breakout Board</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1728">PR-1728</a> SAMA5D27: Add
+ support for Giant Board</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1397">PR-1397</a> EOSS3: Initial
+ support for the QuickLogic EOS S3 SoC QuickFeather board</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1268">PR-1268</a> STM32: Add
+ support for nucleo-f412zg board</p>
+ </li>
+</ul>
+
+<h2 id="file-system">File System</h2>
+
+<h3 id="bug-fixes-4"><strong>Bug Fixes</strong></h3>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1796">PR-1796</a> vfs: Fix
+ memory leak calling <code class="highlighter-rouge">pseudorename</code></p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1794">PR-1794</a> vfs: Fix issue
+ where opendir would remove the trailing whitespace or /</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1793">PR-1793</a> vfs: Make sure
+ that rename of mount point uses pseudorename. Previously mv on a mountpoint
+ would return err 88.</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1737">PR-1737</a> vfs: reuse
+ file_dup2 direction in file_dup to prevent segfault issue</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1490">PR-1490</a> Ensure that
+ filesystems can all support paths that end with ‘/’</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1546">PR-1546</a> ROMFS: Fix
+ issue with how hard links are followed for ROMFS</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1442">PR-1442</a> SmartFS: Fix
+ file size corruption when opening with overwriting mode</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1431">PR-1431</a> nxffs: Fix
+ scan good block slowly and scan an invalid block</p>
+ </li>
+</ul>
+
+<p>PR-1295 fs: for setfd correct the return value</p>
+
+<h3 id="significant-improvements-1"><strong>Significant Improvements</strong></h3>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1554">PR-1554</a> CROMFS: Add
+ support for hard links</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1499">PR-1499</a> FAT: Add
+ support for UTF8 long filename</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1479">PR-1479</a> vfs: Add file
+ descriptor based events support eventfd()</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1482">PR-1582</a> vfs: Add
+ epoll_create1() support</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1579">PR-1579</a> vfs: Do not
+ check CONFIG_NFILE_STREAMS for mkdir/rename/rmdir/fs_unlink</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1355">PR-1355</a> vfs: Implement
+ statvfs and fstatvfs</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1323">PR-1323</a> vfs: Add
+ chmod/fchmod/utimes function prototypes</p>
+ </li>
+</ul>
+
+<h2 id="networking">Networking</h2>
+
+<h3 id="bug-fixes-5"><strong>Bug Fixes</strong></h3>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1267">PR-1267</a> SocketCAN:
+ When timestamped frame was received while in CAN2.0B mode the frame got dropped.</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1446">PR-1446</a> usrsock: Fix
+ recv() cannot peek data</p>
+ </li>
+</ul>
+
+<h3 id="significant-improvements-2"><strong>Significant Improvements</strong></h3>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1666">PR-1666</a> Bluetooth:
+ Bluetooth sockets now use Linux sockaddr types of sockaddr_l2 sockaddr_hci
+ sockaddr_rc. There are slight breaking changes here that may require
+ applications to be updated, but this brings the interface inline with Linux.</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1581">PR-1581</a> Socket: Add
+ SOCK_CLOEXEC/SOCK_NONBLOCK support</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1443">PR-1443</a> usrsock: Add
+ flag argument to sendto/recvfrom interface in usrsock</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx/pull/1238">PR-1238</a> SocketCAN: Add
+ support for SocketCAN interface API</p>
+ </li>
+</ul>
+
+<h2 id="applications">Applications</h2>
+
+<h3 id="significant-improvements-3"><strong>Significant Improvements</strong></h3>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/409">PR-409</a> wamr:
+ Update version to 09-29-2020 that supports NuttX directly and remove patches</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/407">PR-407</a> ipcfg: Add
+ IPv4 configuration file access helper</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/406">PR-406</a> wamr: Add
+ configs for heap pool and custom name sections</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/404">PR-404</a> timer: Add
+ supplying timer dev path to example</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/402">PR-403</a>
+ nxplayer/nxrecorder: Add channel map support</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/396">PR-396</a> wamr: Add
+ missing options to kconfig</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/395">PR-395</a> dhcpc: Try
+ to get hostname via syscall first</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/391">PR-391</a> wapi: Add
+ option to assocated directly via bssid</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/390">PR-390</a> wapi: App
+ option to scan partial channel</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/387">PR-387</a> wamr: Add
+ support for WAMR web assembly interpreter</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/337">PR-337</a> docs:
+ Convert all README files to markdown</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/333">PR-333</a> webclient:
+ Add hooks for TLS, extra request headers, PUT method, report status code,
+ improved error handling</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/329">PR-329</a> gpio: Add
+ support for new GPIO pin types</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/317">PR-317</a> nshlib:
+ Call symlink if user pass -s for ln command</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/315">PR-315</a> c++:
+ Support uClibc++ and libcxx in examples/testing</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/314">PR-314</a> camera: Add
+ a simple camera snapshot example</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/378">PR-378</a> wasm3:
+ Initial WebAssembly runtime support</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/374">PR-374</a> bluetooth:
+ Use the new l2cap socket address type</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/373">PR-373</a> duktape:
+ Add duktape to global search path so it can be used as a library</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/372">PR-372</a> quickjs:
+ Add support for QuickJS interpreter</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/367">PR-367</a> nsh: Accept
+ the command line arguments like sh</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/365">PR-365</a> duktape:
+ Add console, print, alert support</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/364">PR-364</a> cu:
+ Refactor cu and add support for “-c” to disable \n to \r\n conversion</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/362">PR-362</a> libuv: Add
+ support for libuv library</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/352">PR-352</a> duktape:
+ Add initial support for duktape</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/364">PR-346</a> wget:
+ Enable URL from command line, can be used with ifup, hooks for HTTPS</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/302">PR-302</a> lvgl: Use
+ the latest version 7.0.2</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/300">PR-300</a> note: Add
+ support for decoding interrupt and syscall instrumentation</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/299">PR-299</a> nxrecorder:
+ Add O_TRUNC when creating a file</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/296">PR-296</a> bmp280: Add
+ support for BMP180 to BMP280 application</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/294">PR-294</a> can: Add
+ cansend and candump utilities for interacting with SocketCAN</p>
+ </li>
+</ul>
+
+<h3 id="bug-fixes-6">Bug Fixes</h3>
+
+<ul>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/411">PR-411</a> wgetjson:
+ Fix build breakage</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/405">PR-405</a> nxplayer:
+ Fix missing “%d” in a sscanf call</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/400">PR-400</a> dhcpc:
+ Handle case where gethostname() might be empty</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/399">PR-399</a> build: Fix
+ build system issue where compiler would only compile first assembly file</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/393">PR-393</a> build: Fix
+ build system issue where ARCHCPUFLAGS in cxx command was lost</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/392">PR-392</a> wapi: Make
+ wapi more robust in failure cases</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/383">PR-383</a> ntpclient:
+ Fix NTP daemon state in case of DNS failure</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/344">PR-344</a> gs2200m:
+ Fix freeing of uninitialized memory</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/335">PR-335</a> ntp: Fix
+ malformated authentication headers in NTP packet</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/331">PR-331</a> telnetd:
+ Fix buffer overflow issue clearing socket address</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/312">PR-312</a> build: Make
+ sure to include incdir when running make export</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/377">PR-377</a> readline:
+ Fix stack overflow when application name is too long</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/259">PR-359</a> nshlib: Fix
+ memory corrupt in nsh_parse if pthread_create() failed</p>
+ </li>
+ <li>
+ <p><a href="https://github.com/apache/incubator-nuttx-apps/pull/354">PR-354</a> dhcpd: Fix
+ member name for “ds_pid”</p>
+ </li>
+</ul>
+
+<h2 id="security-issues-fixed-in-this-release">Security Issues Fixed In This Release</h2>
+
+<h2 id="compatibility-concerns">Compatibility Concerns</h2>
+
+<h2 id="changes-to-build-system">Changes to Build System</h2>
+
+<h3 id="in-apps-change-topdir-to-appdir">In Apps, Change <code class="highlighter-rouge">$(TOPDIR)</code> to <code class="highlighter-rouge">$(APPDIR)</code></h3>
+
+<p>In the ‘apps’ repo, Makefiles are now using <code class="highlighter-rouge">$(APPDIR)</code> instead of <code class="highlighter-rouge">$(TOPDIR)</code>.</p>
+
+<p>In your custom app’s Makefile, it is recommended to change <code class="highlighter-rouge">$(TOPDIR)</code> to
+<code class="highlighter-rouge">$(APPDIR)</code>.</p>
+
+<p>Replace this line:</p>
+
+<p>include $(TOPDIR)/Make.defs</p>
+
+<p>With this:</p>
+
+<p>include $(APPDIR)/Make.defs</p>
+
+<p>See * <a href="https://github.com/apache/incubator-nuttx-apps/pull/326">PR-326</a>, git
+commit #
+<code class="highlighter-rouge">[deaa6c5b7bf8445b4a300691525f60aa506be0d7](https://github.com/apache/incubator-nuttx-apps/commit/deaa6c5b7bf8445b4a300691525f60aa506be0d7)</code>
+in the NuttX ‘apps’ repository.</p>
+
+<h3 id="custom-boards-dont-need-archincludes-and-archxxincludes-definitions">Custom Boards Don’t Need <code class="highlighter-rouge">ARCHINCLUDES</code> and <code class="highlighter-rouge">ARCHXXINCLUDES</code> Definitions</h3>
+
+<p>As part of an effort to unify support for uClibc++ and libc++, the C/C++ include
+search path definitions <code class="highlighter-rouge">ARCHINCLUDES</code> and <code class="highlighter-rouge">ARCHXXINCLUDES</code> are now defined in
+one central place in <code class="highlighter-rouge">tools/Config.mk</code>. It is no longer necessary to define
+these in every board’s <code class="highlighter-rouge">scripts/Make.defs</code>. Boards included in the NuttX
+repository have been updated, but if you are building NuttX for a custom board
+and are using C++, you may want to make the following changes:</p>
+
+<p>In your board’s configuration, ensure that you have enabled either
+<code class="highlighter-rouge">CONFIG_UCLIBCXX</code> or <code class="highlighter-rouge">CONFIG_LIBCXX</code> as appropriate.</p>
+
+<p>In your custom board’s <code class="highlighter-rouge">scripts/Make.defs</code> file, remove lines like these:</p>
+
+<p>CINCPATH := ${shell $(INCDIR) -s “$(CC)” $(TOPDIR)$(DELIM)include} CXXINCPATH :=
+${shell $(INCDIR) -s “$(CC)” $(TOPDIR)$(DELIM)include$(DELIM)cxx} ARCHINCLUDES
++= $(CINCPATH) ARCHXXINCLUDES += $(CINCPATH) $(CXXINCPATH)</p>
+
+<p>In case your <code class="highlighter-rouge">scripts/Make.defs</code> uses different names, such as <code class="highlighter-rouge">ARCHINCLUDESXX</code>
+instead of <code class="highlighter-rouge">ARCHXXINCLUDES</code>, you’ll need to find all uses of that variable and
+update them to use <code class="highlighter-rouge">ARCHXXINCLUDES</code>.</p>
+
+<p>See * <a href="https://github.com/apache/incubator-nuttx/pull/1396">PR-1396</a>, git
+commit
+#<a href="https://github.com/apache/incubator-nuttx/commit/d32e9c38dfb0659a7f3c0cf586ba1584cd7eb3d6">d32e9c38dfb0659a7f3c0cf586ba1584cd7eb3d6</a>
+in the main NuttX repository.</p>
+
+<p>See also * <a href="https://github.com/apache/incubator-nuttx/pull/1399">PR-1399</a>, git
+commit
+#<a href="https://github.com/apache/incubator-nuttx/commit/6abd03d53ff9164fb17ea4aca701a49fbbf751c0">6abd03d53ff9164fb17ea4aca701a49fbbf751c0</a>.</p>
+
+<h3 id="custom-boards-dont-need-hostcc-and-hostcflags-definitions">Custom Boards Don’t Need <code class="highlighter-rouge">HOSTCC</code> and <code class="highlighter-rouge">HOSTCFLAGS</code> Definitions</h3>
+
+<p>The NuttX build system uses several binary utilities that it compiles and runs
+on the host computer. To build these binaries, it needs to know the host C
+compiler and C flags. Previously, every board’s <code class="highlighter-rouge">scripts/Make.defs</code> file had to
+provide this information via <code class="highlighter-rouge">HOSTCC</code> and <code class="highlighter-rouge">HOSTCFLAGS</code> Definitions. As part of
+an effort to simplify the build system, these definitions are now automatically
+provided by logic in <code class="highlighter-rouge">tools/Config.mk</code>. Boards included in the NuttX repository
+have been updated, but if you are building NuttX for a custom board, you may
+want to make the following changes:</p>
+
+<p>In your custom board’s <code class="highlighter-rouge">scripts/Make.defs</code> file, remove lines like these:</p>
+
+<p>HOSTCC = gcc HOSTCFLAGS = -Wall -Wstrict-prototypes -Wshadow -Wundef -g -pipe</p>
+
+<p>Sometimes they may look like this:</p>
+
+<p>ifeq ($(CONFIG_WINDOWS_NATIVE),y)
+ HOSTCC = mingw32-gcc.exe
+else
+ HOSTCC = gcc
+endif</p>
+
+<p>Note: These changes are OPTIONAL.</p>
+
+<p>You may still set these definitions in your board’s scripts/Make.defs, and your
+definitions will override the ones in tools/Config.mk.</p>
+
+<p>Also, you may override these definitions for a single run by providing them on
+the make command line. This is useful if, for example, you wish to build debug
+versions of these host binaries: define HOSTCFLAGS with -g on the command line.</p>
+
+<p>See * <a href="https://github.com/apache/incubator-nuttx/pull/1398">PR-1398</a>, git
+commit
+#<a href="https://github.com/apache/incubator-nuttx/commit/ee875b2a260cb4cc532b8ca303c2515e24c39b4e">ee875b2a260cb4cc532b8ca303c2515e24c39b4e</a>
+in the main NuttX repository.</p>
+
+<h3 id="removal-of-unused-archccversion-and-archccmajor">Removal of Unused <code class="highlighter-rouge">ARCHCCVERSION</code> and <code class="highlighter-rouge">ARCHCCMAJOR</code></h3>
+
+<p>The ARCHCCVERSION and ARCHCCMAJOR variables are unused. Historically they were
+defined in many boards’ scripts/Make.defs. These were removed from all boards in
+the NuttX repository, but if you are building NuttX for a custom board, you may
+want to remove this unnecessary boilerplate.</p>
+
+<p>In your custom board’s <code class="highlighter-rouge">scripts/Make.defs</code> file, remove lines like these:</p>
+
+<p>ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n ‘/^gcc version/p’ | sed -e
+‘s/^gcc version \([0-9\.]\)/\1/g’ -e ‘s/[-\ ].*//g’ -e ‘1q’}
+ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d’.’ -f1}</p>
+
+<p>See * <a href="https://github.com/apache/incubator-nuttx/pull/1344">PR-1344</a>, git
+commit
+#<a href="https://github.com/apache/incubator-nuttx/commit/f5311de6b42466ab5c6ef299dab0ecc417131bbe">f5311de6b42466ab5c6ef299dab0ecc417131bbe</a>
+in the main NuttX repository.</p>
+
+<h3 id="custom-boards-may-not-need-extra_libs-and-extra_libpaths-definitions">Custom Boards May Not Need <code class="highlighter-rouge">EXTRA_LIBS</code> and <code class="highlighter-rouge">EXTRA_LIBPATHS</code> Definitions</h3>
+
+<p>The <code class="highlighter-rouge">EXTRA_LIBS</code> and <code class="highlighter-rouge">EXTRA_LIBPATHS</code> make variables were previously defined in
+many boards’ <code class="highlighter-rouge">scripts/Make.defs</code> files. These are now defined in a more central
+location: <code class="highlighter-rouge">arch/*/src/*/Toolchain.defs</code>. Your board’s <code class="highlighter-rouge">scripts/Make.defs</code>
+usually includes this file. Boards included in NuttX have been updated, but if
+you are building NuttX for a custom board, you may need to update your board’s
+<code class="highlighter-rouge">scripts/Make.defs</code> file to ensure you build with the correct definitions.</p>
+
+<p>If you have lines like these:</p>
+
+<p>EXTRA_LIBPATHS = -L “${shell dirname “$(LIBSUPXX)”}” EXTRA_LIBS = -lsupc++</p>
+
+<p>You may want to do one of the following:</p>
+
+<ul>
+ <li>If they are redundant to the definitions provided in the included
+<code class="highlighter-rouge">arch/*/src/*/Toolchain.defs</code>, remove these lines, or * If they contain
+additional needed libraries and paths not present in
+<code class="highlighter-rouge">arch/*/src/*/Toolchain.defs</code>, remove any redundant definitions and change the
+assignment ‘<code class="highlighter-rouge">=</code>’ to ‘<code class="highlighter-rouge">+=</code>’.</li>
+</ul>
+
+<p>See * <a href="https://github.com/apache/incubator-nuttx/pull/1404">PR-1404</a>, git
+commit
+#<a href="https://github.com/apache/incubator-nuttx/commit/4910d43ab0fc360dbddb1f8a31db2a3ee383b46d">4910d43ab0fc360dbddb1f8a31db2a3ee383b46d</a>
+in the main NuttX repository.</p>
+
+<h3 id="custom-boards-may-not-need-cc-cxx-cpp-ld-strip-ar-nm-objcopy-and">Custom Boards May Not Need CC, CXX, CPP, LD, STRIP, AR, NM, OBJCOPY, and</h3>
+<p>OBJDUMP Definitions</p>
+
+<p>These <code class="highlighter-rouge">make</code> variables were previously defined in many boards’ scripts/Make.defs
+files with copy-paste duplication spanning many hundreds of files. These are now
+defined in a more central location: <code class="highlighter-rouge">arch/*/src/*/Toolchain.defs</code>. Your board’s
+<code class="highlighter-rouge">scripts/Make.defs</code> usually includes this file. Boards included in NuttX have
+been updated, but if you are building NuttX for a custom board, you may need to
+update your board’s <code class="highlighter-rouge">scripts/Make.defs</code> file to ensure you build with the
+correct definitions.</p>
+
+<p>If you have lines that define <code class="highlighter-rouge">CC</code>, <code class="highlighter-rouge">CXX</code>, <code class="highlighter-rouge">CPP</code>, <code class="highlighter-rouge">LD</code>, <code class="highlighter-rouge">STRIP</code>, <code class="highlighter-rouge">AR</code>, <code class="highlighter-rouge">NM</code>,
+<code class="highlighter-rouge">OBJCOPY</code>, and <code class="highlighter-rouge">OBJDUMP</code>, such as these:</p>
+
+<p>CC = $(CROSSDEV)gcc CXX = $(CROSSDEV)g++ CPP = $(CROSSDEV)gcc -E -P -x c LD =
+$(CROSSDEV)ld STRIP = $(CROSSDEV)strip –strip-unneeded AR = $(ARCROSSDEV)ar rcs
+NM = $(ARCROSSDEV)nm OBJCOPY = $(CROSSDEV)objcopy OBJDUMP = $(CROSSDEV)objdump</p>
+
+<p>You may want to do one of the following:</p>
+
+<ul>
+ <li>If they are redundant to the definitions provided in the included
+<code class="highlighter-rouge">arch/*/src/*/Toolchain.defs</code>, remove these lines, or * If they are different
+from the definitions in <code class="highlighter-rouge">arch/*/src/*/Toolchain.defs</code>, leave them as-is and they
+will take precedence.</li>
+</ul>
+
+<p>See * <a href="https://github.com/apache/incubator-nuttx/pull/1426">PR-1426</a>, git
+commit
+#<a href="https://github.com/apache/incubator-nuttx/commit/b329e2377dd8816f37ad0408279926829efdf85d">b329e2377dd8816f37ad0408279926829efdf85d</a>
+in the main NuttX repository.</p>
+
+<h3 id="consolidated-arcrossdev-and-crossdev">Consolidated ARCROSSDEV and CROSSDEV</h3>
+
+<p>The <code class="highlighter-rouge">ARCROSSDEV</code> and <code class="highlighter-rouge">CROSSDEV</code> variables always had identical values. Therefore
+<code class="highlighter-rouge">ARCROSSDEV</code> has been removed and <code class="highlighter-rouge">CROSSDEV</code> is used instead. Boards included in
+NuttX have been updated, but if you are building NuttX for a custom board, you
+may need to update your board’s build scripts to use the <code class="highlighter-rouge">CROSSDEV</code> variable.</p>
+
+<p>See * <a href="https://github.com/apache/incubator-nuttx/pull/1439">PR-1439</a>, git
+commit
+#<a href="https://github.com/apache/incubator-nuttx/commit/5efa93ec26fd8a3fd85b24a2008bb743f96027fb">5efa93ec26fd8a3fd85b24a2008bb743f96027fb</a>
+in the main NuttX repository.</p>
+
+ </div>
+</div>
+
+
+ <hr>
+ <footer>
+ <!-- <p>© 2020 </p>-->
+ <footer class="site-footer">
+ <div class="wrapper">
+ <div class="footer-col-wrapper">
+
+ Apache NuttX is an effort undergoing <a href="https://incubator.apache.org/index.html">Incubation</a>
+ at The Apache Software Foundation (ASF), sponsored by the Incubator. Incubation is required of all newly
+ accepted projects until a further review indicates that the infrastructure, communications, and decision
+ making process have stabilized in a manner consistent with other successful ASF projects. While incubation
+ status is not necessarily a reflection of the completeness or stability of the code, it does indicate that
+ the project has yet to be fully endorsed by the ASF.
+ <hr>
+
+ <div style="text-align:center;">
+
+ <div style="margin-top: 20px; margin-bottom: 20px;">
+ <a href="http://incubator.apache.org"><img src="/assets/themes/apache/img/egg-logo.png"
+ alt="Apache Incubator"/></a>
+ </div>
+
+ <div>
+ Copyright © 2019 <a href="http://www.apache.org">The Apache Software Foundation</a>.
+ Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version
+ 2.0</a>.
+ <br>
+
+ Apache, the Apache Feather logo, and the Apache Incubator project logo are trademarks of The Apache
+ Software Foundation.
+
+ </div>
+ </div>
+ </div>
+ </div>
+</footer>
+
+ </footer>
+ </div>
+
+
+ <script src="/assets/themes/apache/jquery/jquery-2.1.1.min.js"></script>
+
+ <script src="/assets/themes/apache/bootstrap/js/bootstrap.min.js"></script>
+
+
+ </body>
+</html>
+