/usr/bin/ld: 找不到 -lpthreads

[cdoco]

ubuntu 20.04

Performing C SOURCE FILE Test CMAKE_HAVE_LIBC_PTHREAD failed with the following output:
Change Dir: /data/deps/QConf-1.2.1/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/make cmTC_8fe75/fast && /usr/bin/make -f CMakeFiles/cmTC_8fe75.dir/build.make CMakeFiles/cmTC_8fe75.dir/build
make[1]: 进入目录“/data/deps/QConf-1.2.1/build/CMakeFiles/CMakeTmp”
Building C object CMakeFiles/cmTC_8fe75.dir/src.c.o
/usr/bin/cc   -DCMAKE_HAVE_LIBC_PTHREAD   -o CMakeFiles/cmTC_8fe75.dir/src.c.o   -c /data/deps/QConf-1.2.1/build/CMakeFiles/CMakeTmp/src.c
Linking C executable cmTC_8fe75
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_8fe75.dir/link.txt --verbose=1
/usr/bin/cc  -DCMAKE_HAVE_LIBC_PTHREAD    -rdynamic CMakeFiles/cmTC_8fe75.dir/src.c.o  -o cmTC_8fe75 
/usr/bin/ld: CMakeFiles/cmTC_8fe75.dir/src.c.o: in function `main':
src.c:(.text+0x46): undefined reference to `pthread_create'
/usr/bin/ld: src.c:(.text+0x52): undefined reference to `pthread_detach'
/usr/bin/ld: src.c:(.text+0x63): undefined reference to `pthread_join'
collect2: error: ld returned 1 exit status
make[1]: *** [CMakeFiles/cmTC_8fe75.dir/build.make:87：cmTC_8fe75] 错误 1
make[1]: 离开目录“/data/deps/QConf-1.2.1/build/CMakeFiles/CMakeTmp”
make: *** [Makefile:121：cmTC_8fe75/fast] 错误 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_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/deps/QConf-1.2.1/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/make cmTC_6e680/fast && /usr/bin/make -f CMakeFiles/cmTC_6e680.dir/build.make CMakeFiles/cmTC_6e680.dir/build
make[1]: 进入目录“/data/deps/QConf-1.2.1/build/CMakeFiles/CMakeTmp”
Building C object CMakeFiles/cmTC_6e680.dir/CheckFunctionExists.c.o
/usr/bin/cc   -DCHECK_FUNCTION_EXISTS=pthread_create   -o CMakeFiles/cmTC_6e680.dir/CheckFunctionExists.c.o   -c /usr/share/cmake-3.16/Modules/CheckFunctionExists.c
Linking C executable cmTC_6e680
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_6e680.dir/link.txt --verbose=1
/usr/bin/cc  -DCHECK_FUNCTION_EXISTS=pthread_create    -rdynamic CMakeFiles/cmTC_6e680.dir/CheckFunctionExists.c.o  -o cmTC_6e680  -lpthreads 
/usr/bin/ld: 找不到 -lpthreads
collect2: error: ld returned 1 exit status
make[1]: *** [CMakeFiles/cmTC_6e680.dir/build.make:87：cmTC_6e680] 错误 1
make[1]: 离开目录“/data/deps/QConf-1.2.1/build/CMakeFiles/CMakeTmp”
make: *** [Makefile:121：cmTC_6e680/fast] 错误 2

查看 /usr/lib/x86_64-linux-gnu 是存在 libpthread.so

deps/QConf-1.2.1/build » l /usr/lib/x86_64-linux-gnu/libpthread*                    
-rwxr-xr-x 1 root root 154K 12月 16 19:04 /usr/lib/x86_64-linux-gnu/libpthread-2.31.so
-rw-r--r-- 1 root root 6.3M 12月 16 19:04 /usr/lib/x86_64-linux-gnu/libpthread.a
lrwxrwxrwx 1 root root   37 12月 16 19:04 /usr/lib/x86_64-linux-gnu/libpthread.so -> /lib/x86_64-linux-gnu/libpthread.so.0
lrwxrwxrwx 1 root root   18 4月  12 19:57 /usr/lib/x86_64-linux-gnu/libpthread.so.0 -> libpthread-2.31.so

[cdoco]

#121

[lwx2615]

这个应该是gcc版本不对，编译要用gcc-4.8的

[lwx2615]

这个应该是gcc版本不对，编译要用gcc-4.8的

[cdoco]

@lwx2615 你看 #121 的描述 #121 (comment)