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Posted to commits@nuttx.apache.org by "alimans (via GitHub)" <gi...@apache.org> on 2025/07/27 19:55:41 UTC
[I] [BUG] Feedback on C++/CMake Guide – Outdated Folder Structure and Build Issues [nuttx]</h1><pre>
alimans opened a new issue, #16782:
URL: https://github.com/apache/nuttx/issues/16782
### Description / Steps to reproduce the issue
Dear Apache NuttX Team,
I was following the [C++ and CMake guide](https://nuttx.apache.org/docs/latest/guides/cpp_cmake.html) from your documentation, and I encountered several issues that I believe may be due to changes in the folder structure or recent updates in the repository.
Specifically:
After running make export, I received the following error:
`nuttxspace/nuttx/libs/libc/elf/gnu-elf.ld': No such file or directory`
It appears this path or file no longer exists or has been moved.
When building the project, it failed with an error related to missing cstdio. I noticed the CMakeLists.txt refers to:
`${NUTTX_PATH}/include/libcxx`
However, this directory seems to have been renamed or replaced—libcxx no longer exists, and I found a cxx directory instead. After adjusting the path, the next build error occurred:
```
error: 'string' was not declared in this scope; did you mean 'stdin'?
src/HelloWorld.cpp:18:9
```
It seems the standard C++ header <string> could not be found. This might indicate missing include paths or incorrect configurations for C++ standard library support in the example.
Based on these issues, I believe the guide could benefit from an update to align with the current repository structure and build process.
Please let me know if there are updated instructions elsewhere or if I can assist in clarifying the problems I encountered.
Thank you for your time and for the great work on NuttX.
### On which OS does this issue occur?
[OS: Linux]
### What is the version of your OS?
Ubuntu 24.04.2 LTS runining with wsl2
### NuttX Version
nuttx-export-12.10.0
### Issue Architecture
[Arch: simulator]
### Issue Area
[Area: Build System]
### Host information
_No response_
### Verification
- [x] I have verified before submitting the report.
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</pre><hr/>
<h2>Re: [I] [BUG] Feedback on C++/CMake Guide – Outdated Folder Structure and Build Issues [nuttx]</h2>
<b>Posted by "leducp (via GitHub)" <gi...@apache.org>.</b><hr/><pre>
leducp commented on issue #16782:
URL: https://github.com/apache/nuttx/issues/16782#issuecomment-3166862078
NuttX export should support CMake toolchain file now, so your CMakeLists.txt should only contains your own project settings, and be built like this:
```
cmake -B my_build_folder -S my_source_folder -DCMAKE_TOOLCHAIN_FILE=top_path_to_find/nuttx-export/scripts/toolchain.cmake
```
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</pre><hr/>
<h2>Re: [I] [BUG] Feedback on C++/CMake Guide – Outdated Folder Structure and Build Issues [nuttx]</h2>
<b>Posted by "acassis (via GitHub)" <gi...@apache.org>.</b><hr/><pre>
acassis closed issue #16782: [BUG] Feedback on C++/CMake Guide – Outdated Folder Structure and Build Issues
URL: https://github.com/apache/nuttx/issues/16782
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</pre><hr/>
<h2>Re: [I] [BUG] Feedback on C++/CMake Guide – Outdated Folder Structure and Build Issues [nuttx]</h2>
<b>Posted by "leducp (via GitHub)" <gi...@apache.org>.</b><hr/><pre>
leducp commented on issue #16782:
URL: https://github.com/apache/nuttx/issues/16782#issuecomment-3166866097
ping @trns1997 It seems that we missed the documentation folder when we integrated the CMake toolchain export
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