problem of cmake

[newExplore-hash]

when run cmake , there are some errors ，tks for your reply

Performing C SOURCE FILE Test CMAKE_HAVE_LIBC_PTHREAD failed with the following output:
Change Dir: /data/zhuzikui/ExocortexCrate/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/gmake cmTC_48f36/fast && /usr/bin/gmake -f CMakeFiles/cmTC_48f36.dir/build.make CMakeFiles/cmTC_48f36.dir/build
gmake[1]: Entering directory /data/zhuzikui/ExocortexCrate/build/CMakeFiles/CMakeTmp' Building C object CMakeFiles/cmTC_48f36.dir/src.c.o /opt/rh/devtoolset-7/root/usr/bin/cc -fPIC -DCMAKE_HAVE_LIBC_PTHREAD -o CMakeFiles/cmTC_48f36.dir/src.c.o -c /data/zhuzikui/ExocortexCrate/build/CMakeFiles/CMakeTmp/src.c Linking C executable cmTC_48f36 /usr/local/bin/cmake -E cmake_link_script CMakeFiles/cmTC_48f36.dir/link.txt --verbose=1 /opt/rh/devtoolset-7/root/usr/bin/cc -fPIC -DCMAKE_HAVE_LIBC_PTHREAD -rdynamic CMakeFiles/cmTC_48f36.dir/src.c.o -o cmTC_48f36 CMakeFiles/cmTC_48f36.dir/src.c.o: In function main':
src.c:(.text+0x2f): undefined reference to pthread_create' src.c:(.text+0x3b): undefined reference to pthread_detach'
src.c:(.text+0x47): undefined reference to pthread_cancel' src.c:(.text+0x58): undefined reference to pthread_join'
src.c:(.text+0x6c): undefined reference to pthread_atfork' collect2: error: ld returned 1 exit status gmake[1]: *** [cmTC_48f36] Error 1 gmake[1]: Leaving directory /data/zhuzikui/ExocortexCrate/build/CMakeFiles/CMakeTmp'
gmake: *** [cmTC_48f36/fast] Error 2

Source file was:
#include <pthread.h>

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: /data/zhuzikui/ExocortexCrate/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/gmake cmTC_67cfa/fast && /usr/bin/gmake -f CMakeFiles/cmTC_67cfa.dir/build.make CMakeFiles/cmTC_67cfa.dir/build
gmake[1]: Entering directory /data/zhuzikui/ExocortexCrate/build/CMakeFiles/CMakeTmp' Building C object CMakeFiles/cmTC_67cfa.dir/CheckFunctionExists.c.o /opt/rh/devtoolset-7/root/usr/bin/cc -fPIC -DCHECK_FUNCTION_EXISTS=pthread_create -o CMakeFiles/cmTC_67cfa.dir/CheckFunctionExists.c.o -c /usr/local/share/cmake-3.18/Modules/CheckFunctionExists.c Linking C executable cmTC_67cfa /usr/local/bin/cmake -E cmake_link_script CMakeFiles/cmTC_67cfa.dir/link.txt --verbose=1 /opt/rh/devtoolset-7/root/usr/bin/cc -fPIC -DCHECK_FUNCTION_EXISTS=pthread_create -rdynamic CMakeFiles/cmTC_67cfa.dir/CheckFunctionExists.c.o -o cmTC_67cfa -lpthreads /opt/rh/devtoolset-7/root/usr/libexec/gcc/x86_64-redhat-linux/7/ld: cannot find -lpthreads collect2: error: ld returned 1 exit status gmake[1]: *** [cmTC_67cfa] Error 1 gmake[1]: Leaving directory /data/zhuzikui/ExocortexCrate/build/CMakeFiles/CMakeTmp'
gmake: *** [cmTC_67cfa/fast] Error 2