Determining if the pthread_setname_np exist failed with the following output: Change Dir: /home/buildroot/autobuild/instance-2/output-1/build/grpc-1.23.0/CMakeFiles/CMakeTmp Run Build Command:"/usr/bin/make" "cmTC_f947b/fast" make[1]: Entering directory '/home/buildroot/autobuild/instance-2/output-1/build/grpc-1.23.0/CMakeFiles/CMakeTmp' /usr/bin/make -f CMakeFiles/cmTC_f947b.dir/build.make CMakeFiles/cmTC_f947b.dir/build make[2]: Entering directory '/home/buildroot/autobuild/instance-2/output-1/build/grpc-1.23.0/CMakeFiles/CMakeTmp' Building C object CMakeFiles/cmTC_f947b.dir/CheckSymbolExists.c.o /home/buildroot/autobuild/instance-2/output-1/host/bin/arm-none-linux-gnueabi-gcc --sysroot=/home/buildroot/autobuild/instance-2/output-1/host/arm-buildroot-linux-gnueabi/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -DNDEBUG -fPIE -o CMakeFiles/cmTC_f947b.dir/CheckSymbolExists.c.o -c /home/buildroot/autobuild/instance-2/output-1/build/grpc-1.23.0/CMakeFiles/CMakeTmp/CheckSymbolExists.c /home/buildroot/autobuild/instance-2/output-1/build/grpc-1.23.0/CMakeFiles/CMakeTmp/CheckSymbolExists.c: In function 'main': /home/buildroot/autobuild/instance-2/output-1/build/grpc-1.23.0/CMakeFiles/CMakeTmp/CheckSymbolExists.c:8:19: error: 'pthread_setname_np' undeclared (first use in this function) return ((int*)(&pthread_setname_np))[argc]; ^ /home/buildroot/autobuild/instance-2/output-1/build/grpc-1.23.0/CMakeFiles/CMakeTmp/CheckSymbolExists.c:8:19: note: each undeclared identifier is reported only once for each function it appears in CMakeFiles/cmTC_f947b.dir/build.make:65: recipe for target 'CMakeFiles/cmTC_f947b.dir/CheckSymbolExists.c.o' failed make[2]: *** [CMakeFiles/cmTC_f947b.dir/CheckSymbolExists.c.o] Error 1 make[2]: Leaving directory '/home/buildroot/autobuild/instance-2/output-1/build/grpc-1.23.0/CMakeFiles/CMakeTmp' Makefile:126: recipe for target 'cmTC_f947b/fast' failed make[1]: *** [cmTC_f947b/fast] Error 2 make[1]: Leaving directory '/home/buildroot/autobuild/instance-2/output-1/build/grpc-1.23.0/CMakeFiles/CMakeTmp' File /home/buildroot/autobuild/instance-2/output-1/build/grpc-1.23.0/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/instance-2/output-1/build/grpc-1.23.0/CMakeFiles/CMakeTmp Run Build Command:"/usr/bin/make" "cmTC_a1fc1/fast" make[1]: Entering directory '/home/buildroot/autobuild/instance-2/output-1/build/grpc-1.23.0/CMakeFiles/CMakeTmp' /usr/bin/make -f CMakeFiles/cmTC_a1fc1.dir/build.make CMakeFiles/cmTC_a1fc1.dir/build make[2]: Entering directory '/home/buildroot/autobuild/instance-2/output-1/build/grpc-1.23.0/CMakeFiles/CMakeTmp' Building C object CMakeFiles/cmTC_a1fc1.dir/CheckSymbolExists.c.o /home/buildroot/autobuild/instance-2/output-1/host/bin/arm-none-linux-gnueabi-gcc --sysroot=/home/buildroot/autobuild/instance-2/output-1/host/arm-buildroot-linux-gnueabi/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -DNDEBUG -fPIE -o CMakeFiles/cmTC_a1fc1.dir/CheckSymbolExists.c.o -c /home/buildroot/autobuild/instance-2/output-1/build/grpc-1.23.0/CMakeFiles/CMakeTmp/CheckSymbolExists.c Linking C executable cmTC_a1fc1 /home/buildroot/autobuild/instance-2/output-1/host/bin/cmake -E cmake_link_script CMakeFiles/cmTC_a1fc1.dir/link.txt --verbose=1 /home/buildroot/autobuild/instance-2/output-1/host/bin/arm-none-linux-gnueabi-gcc --sysroot=/home/buildroot/autobuild/instance-2/output-1/host/arm-buildroot-linux-gnueabi/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -DNDEBUG -latomic CMakeFiles/cmTC_a1fc1.dir/CheckSymbolExists.c.o -o cmTC_a1fc1 /home/buildroot/autobuild/instance-2/output-1/host/opt/ext-toolchain/bin/../lib/gcc/arm-none-linux-gnueabi/4.8.3/../../../../arm-none-linux-gnueabi/bin/ld: CMakeFiles/cmTC_a1fc1.dir/CheckSymbolExists.c.o: undefined reference to symbol 'pthread_create@@GLIBC_2.4' /home/buildroot/autobuild/instance-2/output-1/host/arm-buildroot-linux-gnueabi/sysroot/thumb2/lib/libpthread.so.0: error adding symbols: DSO missing from command line collect2: error: ld returned 1 exit status CMakeFiles/cmTC_a1fc1.dir/build.make:97: recipe for target 'cmTC_a1fc1' failed make[2]: *** [cmTC_a1fc1] Error 1 make[2]: Leaving directory '/home/buildroot/autobuild/instance-2/output-1/build/grpc-1.23.0/CMakeFiles/CMakeTmp' Makefile:126: recipe for target 'cmTC_a1fc1/fast' failed make[1]: *** [cmTC_a1fc1/fast] Error 2 make[1]: Leaving directory '/home/buildroot/autobuild/instance-2/output-1/build/grpc-1.23.0/CMakeFiles/CMakeTmp' File /home/buildroot/autobuild/instance-2/output-1/build/grpc-1.23.0/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/instance-2/output-1/build/grpc-1.23.0/CMakeFiles/CMakeTmp Run Build Command:"/usr/bin/make" "cmTC_f2cb0/fast" make[1]: Entering directory '/home/buildroot/autobuild/instance-2/output-1/build/grpc-1.23.0/CMakeFiles/CMakeTmp' /usr/bin/make -f CMakeFiles/cmTC_f2cb0.dir/build.make CMakeFiles/cmTC_f2cb0.dir/build make[2]: Entering directory '/home/buildroot/autobuild/instance-2/output-1/build/grpc-1.23.0/CMakeFiles/CMakeTmp' Building C object CMakeFiles/cmTC_f2cb0.dir/CheckFunctionExists.c.o /home/buildroot/autobuild/instance-2/output-1/host/bin/arm-none-linux-gnueabi-gcc --sysroot=/home/buildroot/autobuild/instance-2/output-1/host/arm-buildroot-linux-gnueabi/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -DCHECK_FUNCTION_EXISTS=pthread_create -DNDEBUG -fPIE -o CMakeFiles/cmTC_f2cb0.dir/CheckFunctionExists.c.o -c /home/buildroot/autobuild/instance-2/output-1/host/share/cmake-3.9/Modules/CheckFunctionExists.c Linking C executable cmTC_f2cb0 /home/buildroot/autobuild/instance-2/output-1/host/bin/cmake -E cmake_link_script CMakeFiles/cmTC_f2cb0.dir/link.txt --verbose=1 /home/buildroot/autobuild/instance-2/output-1/host/bin/arm-none-linux-gnueabi-gcc --sysroot=/home/buildroot/autobuild/instance-2/output-1/host/arm-buildroot-linux-gnueabi/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -DCHECK_FUNCTION_EXISTS=pthread_create -DNDEBUG -latomic CMakeFiles/cmTC_f2cb0.dir/CheckFunctionExists.c.o -o cmTC_f2cb0 -lpthreads /home/buildroot/autobuild/instance-2/output-1/host/opt/ext-toolchain/bin/../lib/gcc/arm-none-linux-gnueabi/4.8.3/../../../../arm-none-linux-gnueabi/bin/ld: cannot find -lpthreads collect2: error: ld returned 1 exit status CMakeFiles/cmTC_f2cb0.dir/build.make:97: recipe for target 'cmTC_f2cb0' failed make[2]: *** [cmTC_f2cb0] Error 1 make[2]: Leaving directory '/home/buildroot/autobuild/instance-2/output-1/build/grpc-1.23.0/CMakeFiles/CMakeTmp' Makefile:126: recipe for target 'cmTC_f2cb0/fast' failed make[1]: *** [cmTC_f2cb0/fast] Error 2 make[1]: Leaving directory '/home/buildroot/autobuild/instance-2/output-1/build/grpc-1.23.0/CMakeFiles/CMakeTmp'