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Performing C SOURCE FILE Test CMAKE_HAVE_LIBC_PTHREAD failed with the following output:
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make[1]: Entering directory '/home/firefly/project/projectCarFollowing/build/CMakeFiles/CMakeTmp'
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Building C object CMakeFiles/cmTC_41b8c.dir/src.c.o
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Linking C executable cmTC_41b8c
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/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_41b8c.dir/link.txt --verbose=1
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/usr/bin/ld: CMakeFiles/cmTC_41b8c.dir/src.c.o: in function `main':
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src.c:(.text+0x48): undefined reference to `pthread_create'
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/usr/bin/ld: src.c:(.text+0x50): undefined reference to `pthread_detach'
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/usr/bin/ld: src.c:(.text+0x5c): undefined reference to `pthread_join'
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collect2: error: ld returned 1 exit status
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make[1]: *** [CMakeFiles/cmTC_41b8c.dir/build.make:87: cmTC_41b8c] Error 1
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make: *** [Makefile:121: cmTC_41b8c/fast] Error 2
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Source file was:
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#include <pthread.h>
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void* test_func(void* data)
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{
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return data;
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}
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int main(void)
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{
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pthread_t thread;
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pthread_create(&thread, NULL, test_func, NULL);
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pthread_detach(thread);
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pthread_join(thread, NULL);
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pthread_atfork(NULL, NULL, NULL);
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pthread_exit(NULL);
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return 0;
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}
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Determining if the function pthread_create exists in the pthreads failed with the following output:
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make[1]: Entering directory '/home/firefly/project/projectCarFollowing/build/CMakeFiles/CMakeTmp'
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Building C object CMakeFiles/cmTC_d4961.dir/CheckFunctionExists.c.o
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/usr/bin/cc -DCHECK_FUNCTION_EXISTS=pthread_create -o CMakeFiles/cmTC_d4961.dir/CheckFunctionExists.c.o -c /usr/share/cmake-3.16/Modules/CheckFunctionExists.c
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Linking C executable cmTC_d4961
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/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_d4961.dir/link.txt --verbose=1
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/usr/bin/ld: cannot find -lpthreads
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collect2: error: ld returned 1 exit status
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make[1]: *** [CMakeFiles/cmTC_d4961.dir/build.make:87: cmTC_d4961] Error 1
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make[1]: Leaving directory '/home/firefly/project/projectCarFollowing/build/CMakeFiles/CMakeTmp'
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make: *** [Makefile:121: cmTC_d4961/fast] Error 2
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