### Author:  [@Yifan\_Liu](https://discourse.cmake.org/u/Yifan_Liu)
#### Post date: [May 3, 2021, 3:12pm UTC](https://discourse.cmake.org/t/performing-c-source-file-test-cmake-have-libc-pthread-failed-with-the-following-output/3253/1 "2021-05-03T15:12:30Z")
Hi, I am trying to create a c++ project from existing source, but I am stuck with an error during the pre-build process and I can’t figure out what leads to it. The first one is a CMakeError, which is shown below:
> Performing C SOURCE FILE Test CMAKE\_HAVE\_LIBC\_PTHREAD failed with the following output:
> Change Dir: E:/Yifan/Hiwi-FSD/FluCo1/Libraries/fsd-libs/trunk/build-dev/CMakeFiles/CMakeTmp
>
> Run Build Command(s):C:/MinGW/msys/1.0/bin/make.exe -f Makefile cmTC\_394d9/fast && /usr/bin/make -f CMakeFiles/cmTC\_394d9.dir/build.make CMakeFiles/cmTC\_394d9.dir/build
> make[1]: Entering directory `/e/Yifan/Hiwi-FSD/FluCo1/Libraries/fsd-libs/trunk/build-dev/CMakeFiles/CMakeTmp’
> Building C object CMakeFiles/cmTC\_394d9.dir/src.c.obj
>
> E:/Yifan/Hiwi-FSD/FluCo1/Libraries/fsd-libs/trunk/nbproject/private/tools/localhost/MinGW/gcc.exe -DCMAKE\_HAVE\_LIBC\_PTHREAD -o CMakeFiles/cmTC\_394d9.dir/src.c.obj -c E:/Yifan/Hiwi-FSD/FluCo1/Libraries/fsd-libs/trunk/build-dev/CMakeFiles/CMakeTmp/src.c
> E:/Yifan/Hiwi-FSD/FluCo1/Libraries/fsd-libs/trunk/build-dev/CMakeFiles/CMakeTmp/src.c: In function ‘main’:
> E:/Yifan/Hiwi-FSD/FluCo1/Libraries/fsd-libs/trunk/build-dev/CMakeFiles/CMakeTmp/src.c:15:3: warning: implicit declaration of function ‘pthread\_atfork’; did you mean ‘pthread\_join’? [-Wimplicit-function-declaration]
> 15 | pthread\_atfork(NULL, NULL, NULL);
> | ^ ~~~~~~~~~~~~~
> | pthread\_join
> Linking C executable cmTC\_394d9.exe
>
> “C:/Program Files/CMake/bin/cmake.exe” -E rm -f CMakeFiles/cmTC\_394d9.dir/objects.a
> C:/MinGW/bin/ar.exe cr CMakeFiles/cmTC\_394d9.dir/objects.a @CMakeFiles/cmTC\_394d9.dir/objects1.rsp
> E:/Yifan/Hiwi-FSD/FluCo1/Libraries/fsd-libs/trunk/nbproject/private/tools/localhost/MinGW/gcc.exe -Wl,–whole-archive CMakeFiles/cmTC\_394d9.dir/objects.a -Wl,–no-whole-archive -o cmTC\_394d9.exe -Wl,–out-implib,libcmTC\_394d9.dll.a -Wl,–major-image-version,0,–minor-image-version,0 @CMakeFiles/cmTC\_394d9.dir/linklibs.rsp
> c:/mingw/bin/…/lib/gcc/mingw32/9.2.0/…/…/…/…/mingw32/bin/ld.exe: CMakeFiles/cmTC\_394d9.dir/objects.a(src.c.obj):src.c:(.text+0x36): undefined reference to `\_imp\_\_pthread\_create’
>
> c:/mingw/bin/…/lib/gcc/mingw32/9.2.0/…/…/…/…/mingw32/bin/ld.exe: CMakeFiles/cmTC\_394d9.dir/objects.a(src.c.obj):src.c:(.text+0x4c): undefined reference to `\_imp\_\_pthread\_detach’
>
> c:/mingw/bin/…/lib/gcc/mingw32/9.2.0/…/…/…/…/mingw32/bin/ld.exe: CMakeFiles/cmTC\_394d9.dir/objects.a(src.c.obj):src.c:(.text+0x62): undefined reference to `\_imp\_\_pthread\_cancel’
>
> c:/mingw/bin/…/lib/gcc/mingw32/9.2.0/…/…/…/…/mingw32/bin/ld.exe: CMakeFiles/cmTC\_394d9.dir/objects.a(src.c.obj):src.c:(.text+0x80): undefined reference to `\_imp\_\_pthread\_join’
>
> c:/mingw/bin/…/lib/gcc/mingw32/9.2.0/…/…/…/…/mingw32/bin/ld.exe: CMakeFiles/cmTC\_394d9.dir/objects.a(src.c.obj):src.c:(.text+0x9e): undefined reference to `pthread\_atfork’
>
> c:/mingw/bin/…/lib/gcc/mingw32/9.2.0/…/…/…/…/mingw32/bin/ld.exe: CMakeFiles/cmTC\_394d9.dir/objects.a(src.c.obj):src.c:(.text+0xaa): undefined reference to `\_imp\_\_pthread\_exit’
>
> collect2.exe: error: ld returned 1 exit status
> make[1]: \*\*\* [cmTC\_394d9.exe] Error 1
> make[1]: Leaving directory `/e/Yifan/Hiwi-FSD/FluCo1/Libraries/fsd-libs/trunk/build-dev/CMakeFiles/CMakeTmp’
> make: \*\*\* [cmTC\_394d9/fast] Error 2
>
> Source file was:
> #include \
>
> static void\* test\_func(void\* data)
> {
> return data;
> }
>
> int main(void)
> {
> pthread\_t thread;
> pthread\_create(&thread, NULL, test\_func, NULL);
> pthread\_detach(thread);
> pthread\_cancel(thread);
> pthread\_join(thread, NULL);
> pthread\_atfork(NULL, NULL, NULL);
> pthread\_exit(NULL);
>
> return 0;
> }
**And the terminal output is:**
> cd ‘E:\Yifan\Hiwi-FSD\FluCo1\Libraries\fsd-libs\trunk\build-dev’
> C:/Program Files/CMake/bin/cmake.exe -G Unix Makefiles -DCMAKE\_BUILD\_TYPE=Debug -DCMAKE\_C\_COMPILER=E:/Yifan/Hiwi-FSD/FluCo1/Libraries/fsd-libs/trunk/nbproject/private/tools/localhost/MinGW/gcc.exe -DCMAKE\_CXX\_COMPILER=E:/Yifan/Hiwi-FSD/FluCo1/Libraries/fsd-libs/trunk/nbproject/private/tools/localhost/MinGW/g++.exe -DCMAKE\_C\_FLAGS\_DEBUG=-g3 -gdwarf-2 -DCMAKE\_CXX\_FLAGS\_DEBUG=-g3 -gdwarf-2 -DCMAKE\_EXPORT\_COMPILE\_COMMANDS=ON -DPROJECT\_SUFFIX=-dev …
> – The C compiler identification is GNU 9.2.0
> – The CXX compiler identification is GNU 9.2.0
> – Detecting C compiler ABI info
> – Detecting C compiler ABI info - done
> – Check for working C compiler: E:/Yifan/Hiwi-FSD/FluCo1/Libraries/fsd-libs/trunk/nbproject/private/tools/localhost/MinGW/gcc.exe - skipped
> – Detecting C compile features
> – Detecting C compile features - done
> – Detecting CXX compiler ABI info
> – Detecting CXX compiler ABI info - done
> – Check for working CXX compiler: E:/Yifan/Hiwi-FSD/FluCo1/Libraries/fsd-libs/trunk/nbproject/private/tools/localhost/MinGW/g++.exe - skipped
> – Detecting CXX compile features
> – Detecting CXX compile features - done
> – The cmake will use build type Debug
> – libfsd-io-dev version is 1.0+
> – Install include dir include/fsd-io-dev
> – fsd-io-dev PROJECT\_SOURCE\_DIR = E:/Yifan/Hiwi-FSD/FluCo1/Libraries/fsd-libs/trunk/IO
> – fsd-io-dev Build directory = E:/Yifan/Hiwi-FSD/FluCo1/Libraries/fsd-libs/trunk/build-dev
> – Found PkgConfig: C:/MinGW/bin/pkg-config.exe (found version “0.26”)
> – Checking for one of the modules ‘openssl’
> CMake Error at C:/Program Files/CMake/share/cmake-3.20/Modules/FindPkgConfig.cmake:843 (message):
> None of the required ‘openssl’ found
> Call Stack (most recent call first):
> IO/CMakeLists.txt:47 (pkg\_search\_module)
>
> – Looking for pthread.h
> – Looking for pthread.h - found
> – Performing Test CMAKE\_HAVE\_LIBC\_PTHREAD
> – Performing Test CMAKE\_HAVE\_LIBC\_PTHREAD - Failed
> – Check if compiler accepts -pthread
> – Check if compiler accepts -pthread - yes
> – Found Threads: TRUE
> – libfsd-log-dev version is 1.0+
> – fsd-log-dev PROJECT\_SOURCE\_DIR = E:/Yifan/Hiwi-FSD/FluCo1/Libraries/fsd-libs/trunk/Log
> – fsd-log-dev Build directory = E:/Yifan/Hiwi-FSD/FluCo1/Libraries/fsd-libs/trunk/build-dev
> – Install include dir include/fsd-log-dev
> – libfsd-math-dev version is 1.0+
> – fsd-math-dev PROJECT\_SOURCE\_DIR = E:/Yifan/Hiwi-FSD/FluCo1/Libraries/fsd-libs/trunk/Math
> – fsd-math-dev Build directory = E:/Yifan/Hiwi-FSD/FluCo1/Libraries/fsd-libs/trunk/build-dev
> – Configuring incomplete, errors occurred!
> See also “E:/Yifan/Hiwi-FSD/FluCo1/Libraries/fsd-libs/trunk/build-dev/CMakeFiles/CMakeOutput.log”.
> See also “E:/Yifan/Hiwi-FSD/FluCo1/Libraries/fsd-libs/trunk/build-dev/CMakeFiles/CMakeError.log”.
>
> PRE-BUILD FAILED (exit value 1, total time: 8s)
Can anyone please help me about it? If you need any further information, I would be glad to offer. I have totally no idea about what’s the cause and where may I find it. I would really appreciate your help, thanksss!!
---
### Author:  [@ben.boeckel](https://discourse.cmake.org/u/ben.boeckel)
#### Post date: [May 3, 2021, 3:28pm UTC](https://discourse.cmake.org/t/performing-c-source-file-test-cmake-have-libc-pthread-failed-with-the-following-output/3253/2 "2021-05-03T15:28:23Z")
It looks like you’re missing OpenSSL headers for MinGW. Does installing the package for that help (I’m not sure what the name would be, but maybe `libssl-devel`, `libssl-dev`, `openssl-devel`, or the like)?
---
### Author:  [@Yifan\_Liu](https://discourse.cmake.org/u/Yifan_Liu)
#### Post date: [May 4, 2021, 12:40am UTC](https://discourse.cmake.org/t/performing-c-source-file-test-cmake-have-libc-pthread-failed-with-the-following-output/3253/3 "2021-05-04T00:40:39Z")
Hi, thank you very much for your reply. I have installed OpenSSL and also added the path as an environment variable. But I think maybe `libssl-devel`, `libssl-dev` , `openssl-devel` are the solutions and I haven’t installed them. However, after I searched in Google, they seem all to be packages for Linux system, can you offer some suggestions on how to install them in Windows? Thanks 🙂
---
### Author:  [@ben.boeckel](https://discourse.cmake.org/u/ben.boeckel)
#### Post date: [May 4, 2021, 9:57am UTC](https://discourse.cmake.org/t/performing-c-source-file-test-cmake-have-libc-pthread-failed-with-the-following-output/3253/4 "2021-05-04T09:57:20Z")
IIRC, MinGW has a package manager similar to Linux. However, maybe I’m thinking of MSYS2 here. [Qt’s instructions](https://wiki.qt.io/Compiling_OpenSSL_with_MinGW) seem relevant here though.
---
### Author:  [@Yifan\_Liu](https://discourse.cmake.org/u/Yifan_Liu)
#### Post date: [May 7, 2021, 9:42am UTC](https://discourse.cmake.org/t/performing-c-source-file-test-cmake-have-libc-pthread-failed-with-the-following-output/3253/5 "2021-05-07T09:42:41Z")
Hi, I have installed MSYS2 and set it as my default tool collection. Then the problem is solved!!! Thank you very much for your advices 😀