Performing C SOURCE FILE Test CMAKE_HAVE_LIBC_PTHREAD failed with the following output: Change Dir: /tmp/instance-7/output-1/build/cegui-00b4e1fe174da53b7ed726ab5970ba51bd5b5ee0/CMakeFiles/CMakeTmp Run Build Command(s):/usr/bin/make cmTC_485dc/fast && make[1]: Entering directory '/tmp/instance-7/output-1/build/cegui-00b4e1fe174da53b7ed726ab5970ba51bd5b5ee0/CMakeFiles/CMakeTmp' /usr/bin/make -f CMakeFiles/cmTC_485dc.dir/build.make CMakeFiles/cmTC_485dc.dir/build make[2]: Entering directory '/tmp/instance-7/output-1/build/cegui-00b4e1fe174da53b7ed726ab5970ba51bd5b5ee0/CMakeFiles/CMakeTmp' Building C object CMakeFiles/cmTC_485dc.dir/src.c.o /tmp/instance-7/output-1/host/bin/powerpc64le-linux-gcc --sysroot=/tmp/instance-7/output-1/host/powerpc64le-buildroot-linux-gnu/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -g0 -D_FORTIFY_SOURCE=1 -std=c11 -DCMAKE_HAVE_LIBC_PTHREAD -o CMakeFiles/cmTC_485dc.dir/src.c.o -c /tmp/instance-7/output-1/build/cegui-00b4e1fe174da53b7ed726ab5970ba51bd5b5ee0/CMakeFiles/CMakeTmp/src.c Linking C executable cmTC_485dc /tmp/instance-7/output-1/host/bin/cmake -E cmake_link_script CMakeFiles/cmTC_485dc.dir/link.txt --verbose=1 /tmp/instance-7/output-1/host/bin/powerpc64le-linux-gcc --sysroot=/tmp/instance-7/output-1/host/powerpc64le-buildroot-linux-gnu/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -g0 -D_FORTIFY_SOURCE=1 -std=c11 -DCMAKE_HAVE_LIBC_PTHREAD CMakeFiles/cmTC_485dc.dir/src.c.o -o cmTC_485dc /tmp/instance-7/output-1/host/opt/ext-toolchain/bin/../lib/gcc/powerpc64le-buildroot-linux-gnu/9.3.0/../../../../powerpc64le-buildroot-linux-gnu/bin/ld: CMakeFiles/cmTC_485dc.dir/src.c.o: in function `main': src.c:(.text.startup+0x34): undefined reference to `pthread_create' /tmp/instance-7/output-1/host/opt/ext-toolchain/bin/../lib/gcc/powerpc64le-buildroot-linux-gnu/9.3.0/../../../../powerpc64le-buildroot-linux-gnu/bin/ld: src.c:(.text.startup+0x40): undefined reference to `pthread_detach' /tmp/instance-7/output-1/host/opt/ext-toolchain/bin/../lib/gcc/powerpc64le-buildroot-linux-gnu/9.3.0/../../../../powerpc64le-buildroot-linux-gnu/bin/ld: src.c:(.text.startup+0x50): undefined reference to `pthread_join' collect2: error: ld returned 1 exit status make[2]: *** [CMakeFiles/cmTC_485dc.dir/build.make:90: cmTC_485dc] Error 1 make[2]: Leaving directory '/tmp/instance-7/output-1/build/cegui-00b4e1fe174da53b7ed726ab5970ba51bd5b5ee0/CMakeFiles/CMakeTmp' make[1]: *** [Makefile:124: cmTC_485dc/fast] Error 2 make[1]: Leaving directory '/tmp/instance-7/output-1/build/cegui-00b4e1fe174da53b7ed726ab5970ba51bd5b5ee0/CMakeFiles/CMakeTmp' Source file was: #include 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: /tmp/instance-7/output-1/build/cegui-00b4e1fe174da53b7ed726ab5970ba51bd5b5ee0/CMakeFiles/CMakeTmp Run Build Command(s):/usr/bin/make cmTC_bb8fd/fast && make[1]: Entering directory '/tmp/instance-7/output-1/build/cegui-00b4e1fe174da53b7ed726ab5970ba51bd5b5ee0/CMakeFiles/CMakeTmp' /usr/bin/make -f CMakeFiles/cmTC_bb8fd.dir/build.make CMakeFiles/cmTC_bb8fd.dir/build make[2]: Entering directory '/tmp/instance-7/output-1/build/cegui-00b4e1fe174da53b7ed726ab5970ba51bd5b5ee0/CMakeFiles/CMakeTmp' Building C object CMakeFiles/cmTC_bb8fd.dir/CheckFunctionExists.c.o /tmp/instance-7/output-1/host/bin/powerpc64le-linux-gcc --sysroot=/tmp/instance-7/output-1/host/powerpc64le-buildroot-linux-gnu/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -g0 -D_FORTIFY_SOURCE=1 -std=c11 -DCHECK_FUNCTION_EXISTS=pthread_create -o CMakeFiles/cmTC_bb8fd.dir/CheckFunctionExists.c.o -c /tmp/instance-7/output-1/host/share/cmake-3.16/Modules/CheckFunctionExists.c Linking C executable cmTC_bb8fd /tmp/instance-7/output-1/host/bin/cmake -E cmake_link_script CMakeFiles/cmTC_bb8fd.dir/link.txt --verbose=1 /tmp/instance-7/output-1/host/bin/powerpc64le-linux-gcc --sysroot=/tmp/instance-7/output-1/host/powerpc64le-buildroot-linux-gnu/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -g0 -D_FORTIFY_SOURCE=1 -std=c11 -DCHECK_FUNCTION_EXISTS=pthread_create CMakeFiles/cmTC_bb8fd.dir/CheckFunctionExists.c.o -o cmTC_bb8fd -lpthreads /tmp/instance-7/output-1/host/opt/ext-toolchain/bin/../lib/gcc/powerpc64le-buildroot-linux-gnu/9.3.0/../../../../powerpc64le-buildroot-linux-gnu/bin/ld: cannot find -lpthreads collect2: error: ld returned 1 exit status make[2]: *** [CMakeFiles/cmTC_bb8fd.dir/build.make:90: cmTC_bb8fd] Error 1 make[2]: Leaving directory '/tmp/instance-7/output-1/build/cegui-00b4e1fe174da53b7ed726ab5970ba51bd5b5ee0/CMakeFiles/CMakeTmp' make[1]: *** [Makefile:124: cmTC_bb8fd/fast] Error 2 make[1]: Leaving directory '/tmp/instance-7/output-1/build/cegui-00b4e1fe174da53b7ed726ab5970ba51bd5b5ee0/CMakeFiles/CMakeTmp'