由于警告，CMake 无法检测 pthread [英] CMake failing to detect pthreads due to warnings

问题描述

使用 CMake 制作项目时出现错误:

I get an error when making a project with CMake:

-- Could NOT find Threads (missing:  Threads_FOUND)

错误日志显示 CMake 被一些真正平庸的东西绊倒了:

The error log shows that CMake tripped up over something truly banal:

/usr/bin/cc   -std=c11 -D_GNU_SOURCE   -Wall -Wextra -Wpointer-arith -Wundef -Wvla -Wwrite-strings -Werror -Wno-error=extra -Wno-error=deprecated-declarations -Wno-error=sign-compare -Wno-error=strict-aliasing -Wno-error=type-limits -Wno-unused-parameter -Wno-error=unused-variable -Wno-error=undef -Wno-error=uninitialized -Wlogical-op -Wno-error=maybe-uninitialized -Waggregate-return -Wnested-externs -Wold-style-definition -Wstrict-prototypes -march=native    -o CMakeFiles/cmTryCompileExec2533162744.dir/CheckIncludeFiles.c.o   -c /mnt/shared/fooproj/build/release/CMakeFiles/CMakeTmp/CheckIncludeFiles.c
/mnt/shared/fooproj/build/release/CMakeFiles/CMakeTmp/CheckIncludeFiles.c:5:5: 
     error: function declaration isn’t a prototype [-Werror=strict-prototypes]
 int main(){return 0;}
 ^
/mnt/shared/fooproj/build/release/CMakeFiles/CMakeTmp/CheckIncludeFiles.c: 
     In function ‘main’:
/mnt/shared/fooproj/build/release/CMakeFiles/CMakeTmp/CheckIncludeFiles.c:5:5: 
     error: old-style function definition [-Werror=old-style-definition]
cc1: all warnings being treated as errors
[...]
Source:
/* */
#include <pthread.h>


int main(){return 0;}

这真的不应该让 CMake 认为 Threads 不存在.我该如何解决这个问题?

This really should be no reason for CMake to think Threads doesn't exist. How do I go about fixing this?

推荐答案

我相信这是 CMake bug 15058 我刚刚报道的.

I believe this is CMake bug 15058 which I just reported.

CMake 用于检查包含文件的测试使用旧式 C 函数定义.如果 -Wold-style-definition -Werror 生效，gcc 会对此感到厌烦.

The test that CMake is using to check the include file uses an old-style C function definition. If -Wold-style-definition -Werror is in effect, gcc will barf on this.

我在上面链接的错误报告中包含了一个补丁，但要快速修复，请在您的 CMake 安装中找到文件 Modules/CheckIncludeFiles.cmake(可能在 /usr/share/cmake 或类似)，找到该行

I included a patch in the bug report linked above, but for a quick fix, find the file Modules/CheckIncludeFiles.cmake in your CMake installation (possibly in /usr/share/cmake or similar), find the line

  "${CMAKE_CONFIGURABLE_FILE_CONTENT}

int main(){return 0;}
")

并将int main()改为int main(void).

这篇关于由于警告，CMake 无法检测 pthread的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！