Determining if the pthread_setname_np exist failed with the following output: Change Dir: /home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp Run Build Command:"/usr/bin/make" "cmTC_d7373/fast" make[1]: Entering directory `/home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp' /usr/bin/make -f CMakeFiles/cmTC_d7373.dir/build.make CMakeFiles/cmTC_d7373.dir/build make[2]: Entering directory `/home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp' Building C object CMakeFiles/cmTC_d7373.dir/CheckSymbolExists.c.o /home/buildroot/autobuild/run/instance-1/output/host/bin/arm-buildroot-linux-gnueabihf-gcc --sysroot=/home/buildroot/autobuild/run/instance-1/output/host/arm-buildroot-linux-gnueabihf/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -DNDEBUG -fPIE -o CMakeFiles/cmTC_d7373.dir/CheckSymbolExists.c.o -c /home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp/CheckSymbolExists.c /home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp/CheckSymbolExists.c: In function 'main': /home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp/CheckSymbolExists.c:8:19: error: 'pthread_setname_np' undeclared (first use in this function); did you mean 'pthread_setcanceltype'? 8 | return ((int*)(&pthread_setname_np))[argc]; | ^~~~~~~~~~~~~~~~~~ | pthread_setcanceltype /home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp/CheckSymbolExists.c:8:19: note: each undeclared identifier is reported only once for each function it appears in make[2]: *** [CMakeFiles/cmTC_d7373.dir/CheckSymbolExists.c.o] Error 1 make[2]: Leaving directory `/home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp' make[1]: *** [cmTC_d7373/fast] Error 2 make[1]: Leaving directory `/home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp' File /home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp/CheckSymbolExists.c: /* */ #include int main(int argc, char** argv) { (void)argv; #ifndef pthread_setname_np return ((int*)(&pthread_setname_np))[argc]; #else (void)argc; return 0; #endif } Determining if the pthread_create exist failed with the following output: Change Dir: /home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp Run Build Command:"/usr/bin/make" "cmTC_0ae57/fast" make[1]: Entering directory `/home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp' /usr/bin/make -f CMakeFiles/cmTC_0ae57.dir/build.make CMakeFiles/cmTC_0ae57.dir/build make[2]: Entering directory `/home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp' Building C object CMakeFiles/cmTC_0ae57.dir/CheckSymbolExists.c.o /home/buildroot/autobuild/run/instance-1/output/host/bin/arm-buildroot-linux-gnueabihf-gcc --sysroot=/home/buildroot/autobuild/run/instance-1/output/host/arm-buildroot-linux-gnueabihf/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -DNDEBUG -fPIE -o CMakeFiles/cmTC_0ae57.dir/CheckSymbolExists.c.o -c /home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp/CheckSymbolExists.c Linking C executable cmTC_0ae57 /home/buildroot/autobuild/run/instance-1/output/host/bin/cmake -E cmake_link_script CMakeFiles/cmTC_0ae57.dir/link.txt --verbose=1 /home/buildroot/autobuild/run/instance-1/output/host/bin/arm-buildroot-linux-gnueabihf-gcc --sysroot=/home/buildroot/autobuild/run/instance-1/output/host/arm-buildroot-linux-gnueabihf/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -DNDEBUG -rdynamic CMakeFiles/cmTC_0ae57.dir/CheckSymbolExists.c.o -o cmTC_0ae57 /home/buildroot/autobuild/run/instance-1/output/host/lib/gcc/arm-buildroot-linux-gnueabihf/9.2.0/../../../../arm-buildroot-linux-gnueabihf/bin/ld: CMakeFiles/cmTC_0ae57.dir/CheckSymbolExists.c.o: in function `main': CheckSymbolExists.c:(.text.startup+0x1c): undefined reference to `pthread_create' collect2: error: ld returned 1 exit status make[2]: *** [cmTC_0ae57] Error 1 make[2]: Leaving directory `/home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp' make[1]: *** [cmTC_0ae57/fast] Error 2 make[1]: Leaving directory `/home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp' File /home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp/CheckSymbolExists.c: /* */ #include int main(int argc, char** argv) { (void)argv; #ifndef pthread_create return ((int*)(&pthread_create))[argc]; #else (void)argc; return 0; #endif } Determining if the function pthread_create exists in the pthreads failed with the following output: Change Dir: /home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp Run Build Command:"/usr/bin/make" "cmTC_14858/fast" make[1]: Entering directory `/home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp' /usr/bin/make -f CMakeFiles/cmTC_14858.dir/build.make CMakeFiles/cmTC_14858.dir/build make[2]: Entering directory `/home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp' Building C object CMakeFiles/cmTC_14858.dir/CheckFunctionExists.c.o /home/buildroot/autobuild/run/instance-1/output/host/bin/arm-buildroot-linux-gnueabihf-gcc --sysroot=/home/buildroot/autobuild/run/instance-1/output/host/arm-buildroot-linux-gnueabihf/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -DCHECK_FUNCTION_EXISTS=pthread_create -DNDEBUG -fPIE -o CMakeFiles/cmTC_14858.dir/CheckFunctionExists.c.o -c /home/buildroot/autobuild/run/instance-1/output/host/share/cmake-3.8/Modules/CheckFunctionExists.c Linking C executable cmTC_14858 /home/buildroot/autobuild/run/instance-1/output/host/bin/cmake -E cmake_link_script CMakeFiles/cmTC_14858.dir/link.txt --verbose=1 /home/buildroot/autobuild/run/instance-1/output/host/bin/arm-buildroot-linux-gnueabihf-gcc --sysroot=/home/buildroot/autobuild/run/instance-1/output/host/arm-buildroot-linux-gnueabihf/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -DCHECK_FUNCTION_EXISTS=pthread_create -DNDEBUG -rdynamic CMakeFiles/cmTC_14858.dir/CheckFunctionExists.c.o -o cmTC_14858 -lpthreads /home/buildroot/autobuild/run/instance-1/output/host/lib/gcc/arm-buildroot-linux-gnueabihf/9.2.0/../../../../arm-buildroot-linux-gnueabihf/bin/ld: cannot find -lpthreads collect2: error: ld returned 1 exit status make[2]: *** [cmTC_14858] Error 1 make[2]: Leaving directory `/home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp' make[1]: *** [cmTC_14858/fast] Error 2 make[1]: Leaving directory `/home/buildroot/autobuild/run/instance-1/output/build/grpc-1.18.0/CMakeFiles/CMakeTmp'