You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@mynewt.apache.org by ko...@apache.org on 2021/05/24 09:19:43 UTC
[mynewt-documentation] branch master updated: native_install:
update macOS "Installing GCC/libc" Mynewt Core accommodated clang as
default compiler for macOS systems,
as gcc-5 was old and not supported on newer macOS versions. Still,
gcc might be installed and used, but it's no longer a default solution.
This is an automated email from the ASF dual-hosted git repository.
kopyscinski pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/mynewt-documentation.git
The following commit(s) were added to refs/heads/master by this push:
new ec1dad8 native_install: update macOS "Installing GCC/libc" Mynewt Core accommodated clang as default compiler for macOS systems, as gcc-5 was old and not supported on newer macOS versions. Still, gcc might be installed and used, but it's no longer a default solution.
ec1dad8 is described below
commit ec1dad8a4a7cb0d7f0c1680ece1e587c3ae950ad
Author: Krzysztof Kopyściński <kr...@codecoup.pl>
AuthorDate: Thu Jan 14 12:14:22 2021 +0100
native_install: update macOS "Installing GCC/libc"
Mynewt Core accommodated clang as default compiler for macOS systems,
as gcc-5 was old and not supported on newer macOS versions. Still, gcc
might be installed and used, but it's no longer a default solution.
---
docs/get_started/native_install/native_tools.rst | 94 ++++--------------------
1 file changed, 13 insertions(+), 81 deletions(-)
diff --git a/docs/get_started/native_install/native_tools.rst b/docs/get_started/native_install/native_tools.rst
index 2c9dcd8..0682722 100644
--- a/docs/get_started/native_install/native_tools.rst
+++ b/docs/get_started/native_install/native_tools.rst
@@ -24,108 +24,40 @@ pages install it (:doc:`../../newt/install/newt_mac`).
Installing GCC/libc
~~~~~~~~~~~~~~~~~~~
-macOS with Xcode ships with a C compiler called Clang. To build applications for the
-Mynewt simulator, a different compiler is used as default: ``gcc``.
+Since macOS with Xcode ships with a C compiler called Clang there is no need to
+install the other compiler. However, one can install gcc compiler with brew:
.. code-block:: console
$ brew install gcc
...
...
- ==> Summary
- 🍺 /usr/local/Cellar/gcc/8.2.0 (1,495 files, 335.9MB)
+ ==> Pouring gcc-10.2.0_2.big_sur.bottle.tar.gz
+ 🍺 /usr/local/Cellar/gcc/10.2.0_2: 1,455 files, 338.1MB
+
Check the GCC version you have installed (either using ``brew`` or
previously installed). The brew-installed version can be checked using
-``brew list gcc``. The default compiler.yml configuration file in Mynewt
-expects version 5.x for Mac users, so if the installed version is newer
-and you wish to continue with this newer version, modify the
-``<mynewt-src-directory>/repos/apache-mynewt-core/compiler/sim/compiler.yml``
-file to change the default ``gcc-5`` defined there to that displayed by
-``brew list gcc``, e.g. ``gcc-8``.
-In other words, replace the lines shown highlighted below:
+``brew list gcc``. To use gcc instead of clang ``<mynewt-src-directory>/repos/apache-mynewt-core/compiler/sim/compiler.yml``
+file must be edited:
.. code-block:: yaml
:emphasize-lines: 2,3
# OS X.
- compiler.path.cc.DARWIN.OVERWRITE: "gcc-5"
- compiler.path.as.DARWIN.OVERWRITE: "gcc-5"
+ compiler.path.cc.DARWIN.OVERWRITE: "gcc"
+ compiler.path.as.DARWIN.OVERWRITE: "gcc"
compiler.path.objdump.DARWIN.OVERWRITE: "gobjdump"
- compiler.path.objsize.DARWIN.OVERWRITE: "objsize"
compiler.path.objcopy.DARWIN.OVERWRITE: "gobjcopy"
+ compiler.flags.base.DARWIN: [-DMN_OSX, -Wno-missing-braces]
+ compiler.ld.resolve_circular_deps.DARWIN.OVERWRITE: false
...with the following:
.. code-block:: yaml
- compiler.path.cc.DARWIN.OVERWRITE: "gcc-8"
- compiler.path.as.DARWIN.OVERWRITE: "gcc-8”
-
-In case you wish to use Clang, you can change your
-``<mynewt-src-directory>/repos/apache-mynewt-core/compiler/sim/compiler.yml``
-to use Clang. Delete the gcc-5 ``DARWIN.OVERWRITE`` lines highlighted below.
-
-.. code-block:: yaml
- :emphasize-lines: 2,3
-
- # OS X.
- compiler.path.cc.DARWIN.OVERWRITE: "gcc-5"
- compiler.path.as.DARWIN.OVERWRITE: "gcc-5"
- compiler.path.objdump.DARWIN.OVERWRITE: "gobjdump"
- compiler.path.objsize.DARWIN.OVERWRITE: "objsize"
- compiler.path.objcopy.DARWIN.OVERWRITE: "gobjcopy"
-
-**NOTE:** Both the newer GCC versions and Clang report a few warnings but
-they can be ignored.
-
-**FURTHER NOTE:** Mynewt developers mostly use GCC 5.x for sim builds;
-so it may take a little while to fix issues reported by the newer
-compiler. One option is to **disable warnings**. To do that, remove the
-``-Werror`` flag as an option for the compiler in the
-``<mynewt-src-directory>/repos/apache-mynewt-core/compiler/sim/compiler.yml``
-file as shown below.
-
-.. code-block:: yaml
- :emphasize-lines: 2
-
- compiler.flags.base: >
- -m32 -Wall -ggdb
-
-You may alternatively choose to **specify the precise warnings to
-ignore** depending on the error thrown by the compiler. For example, if
-you see a ``[-Werror=misleading-indentation]`` error while building the
-sim image, add ``-Wno-misleading-indentation]`` as a compiler flag in
-the same line from the
-``<mynewt-src-directory>/repos/apache-mynewt-core/compiler/sim/compiler.yml``
-file.
-
-.. code-block:: yaml
- :emphasize-lines: 2
-
- compiler.flags.base: >
- -m32 -Wall -Werror -ggdb -Wno-misleading-indentation
-
-A third option is to simply **downgrade to GCC 5.x**:
-
-.. code-block:: console
-
- $ brew install gcc@5
-
-Note that Homebrew will no longer install GCC 5.x on macOS 10.13 and newer:
-
-.. code-block:: console
-
- $ brew install gcc@5
- gcc@5: This formula either does not compile or function as expected on macOS
- versions newer than High Sierra due to an upstream incompatibility.
- Error: An unsatisfied requirement failed this build.
-
-In this case, you might try downgrading to GCC 6.x, which is still available:
-
-.. code-block:: console
-
- $ brew install gcc@6
+ compiler.path.cc.DARWIN.OVERWRITE: "gcc-<version>"
+ compiler.path.as.DARWIN.OVERWRITE: "gcc-<version>”
Installing GDB
~~~~~~~~~~~~~~