Cmake has no obvious error after compilation, but prompts that pthread cannot be found

cmake Construction Engineering , After completion , There are no obvious mistakes , But it's a hint "Configuration failed".

After careful examination , Cause of error and "Error.log" It doesn't matter at all ！

terms of settlement : Go over the newly revised CMakeLists.txt , There must be Call error / Write less The place of

Error file "Error.log" The error of is similar to the following ：

Performing C SOURCE FILE Test CMAKE_HAVE_LIBC_PTHREAD failed with the following output:
Change Dir: ${projectDir}/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/make cmTC_c7717/fast && /usr/bin/make  -f CMakeFiles/cmTC_c7717.dir/build.make CMakeFiles/cmTC_c7717.dir/build
make[1]: Entering directory '${projectDir}/build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_c7717.dir/src.c.o
/usr/bin/cc -DCMAKE_HAVE_LIBC_PTHREAD  -O2 -DNDEBUG -g -fno-omit-frame-pointer -fPIE -o CMakeFiles/cmTC_c7717.dir/src.c.o -c ${projectDir}/build/CMakeFiles/CMakeTmp/src.c
Linking C executable cmTC_c7717
/usr/local/bin/cmake -E cmake_link_script CMakeFiles/cmTC_c7717.dir/link.txt --verbose=1
/usr/bin/cc -O2 -DNDEBUG -g -fno-omit-frame-pointer CMakeFiles/cmTC_c7717.dir/src.c.o -o cmTC_c7717 
CMakeFiles/cmTC_c7717.dir/src.c.o: In function `main': ${
     projectDir}/build/CMakeFiles/CMakeTmp/src.c:11: undefined reference to `pthread_create' ${projectDir}/build/CMakeFiles/CMakeTmp/src.c:12: undefined reference to `pthread_detach' ${
      projectDir}/build/CMakeFiles/CMakeTmp/src.c:13: undefined reference to `pthread_cancel'
${projectDir}/build/CMakeFiles/CMakeTmp/src.c:14: undefined reference to `pthread_join' ${
     projectDir}/build/CMakeFiles/CMakeTmp/src.c:15: undefined reference to `pthread_atfork' collect2: error: ld returned 1 exit status CMakeFiles/cmTC_c7717.dir/build.make:105: recipe for target 'cmTC_c7717' failed make[1]: *** [cmTC_c7717] Error 1 make[1]: Leaving directory '${projectDir}/build/CMakeFiles/CMakeTmp' Makefile:140: recipe for target 'cmTC_c7717/fast' failed make: *** [cmTC_c7717/fast] Error 2 Source file was: #include <pthread.h> 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; } Determining if the function pthread_create exists in the pthreads failed with the following output: Change Dir: ${projectDir}/build/CMakeFiles/CMakeTmp Run Build Command(s):/usr/bin/make cmTC_a697d/fast && /usr/bin/make -f CMakeFiles/cmTC_a697d.dir/build.make CMakeFiles/cmTC_a697d.dir/build make[1]: Entering directory '${projectDir}/build/CMakeFiles/CMakeTmp' Building C object CMakeFiles/cmTC_a697d.dir/CheckFunctionExists.c.o /usr/bin/cc -DCHECK_FUNCTION_EXISTS=pthread_create -O2 -DNDEBUG -g -fno-omit-frame-pointer -fPIE -o CMakeFiles/cmTC_a697d.dir/CheckFunctionExists.c.o -c /usr/local/share/cmake-3.19/Modules/CheckFunctionExists.c Linking C executable cmTC_a697d /usr/local/bin/cmake -E cmake_link_script CMakeFiles/cmTC_a697d.dir/link.txt --verbose=1 /usr/bin/cc -DCHECK_FUNCTION_EXISTS=pthread_create -O2 -DNDEBUG -g -fno-omit-frame-pointer CMakeFiles/cmTC_a697d.dir/CheckFunctionExists.c.o -o cmTC_a697d -lpthreads /usr/bin/ld: cannot find -lpthreads collect2: error: ld returned 1 exit status CMakeFiles/cmTC_a697d.dir/build.make:105: recipe for target 'cmTC_a697d' failed make[1]: *** [cmTC_a697d] Error 1 make[1]: Leaving directory '${projectDir}/build/CMakeFiles/CMakeTmp' Makefile:140: recipe for target 'cmTC_a697d/fast' failed make: *** [cmTC_a697d/fast] Error 2 Determining if the strtod_l exist failed with the following output: Change Dir: ${projectDir}/build/CMakeFiles/CMakeTmp Run Build Command(s):/usr/bin/make cmTC_da49d/fast && /usr/bin/make -f CMakeFiles/cmTC_da49d.dir/build.make CMakeFiles/cmTC_da49d.dir/build make[1]: Entering directory '${projectDir}/build/CMakeFiles/CMakeTmp' Building C object CMakeFiles/cmTC_da49d.dir/CheckSymbolExists.c.o /usr/bin/cc -O2 -DNDEBUG -g -fno-omit-frame-pointer -fPIE -o CMakeFiles/cmTC_da49d.dir/CheckSymbolExists.c.o -c ${projectDir}/build/CMakeFiles/CMakeTmp/CheckSymbolExists.c ${projectDir}/build/CMakeFiles/CMakeTmp/CheckSymbolExists.c: In function 'main': ${projectDir}/build/CMakeFiles/CMakeTmp/CheckSymbolExists.c:8:19: error: 'strtod_l' undeclared (first use in this function); did you mean 'strtoull'? return ((int*)(&strtod_l))[argc]; ^~~~~~~~ strtoull ${projectDir}/build/CMakeFiles/CMakeTmp/CheckSymbolExists.c:8:19: note: each undeclared identifier is reported only once for each function it appears in CMakeFiles/cmTC_da49d.dir/build.make:84: recipe for target 'CMakeFiles/cmTC_da49d.dir/CheckSymbolExists.c.o' failed make[1]: *** [CMakeFiles/cmTC_da49d.dir/CheckSymbolExists.c.o] Error 1 make[1]: Leaving directory '${projectDir}/build/CMakeFiles/CMakeTmp' Makefile:140: recipe for target 'cmTC_da49d/fast' failed
make: *** [cmTC_da49d/fast] Error 2


File ${projectDir}/build/CMakeFiles/CMakeTmp/CheckSymbolExists.c:
/* */
#include <stdlib.h>

int main(int argc, char** argv)
{
    
  (void)argv;
#ifndef strtod_l
  return ((int*)(&strtod_l))[argc];
#else
  (void)argc;
  return 0;
#endif
}