Performing C SOURCE FILE Test CMAKE_HAVE_LIBC_PTHREAD failed with the following output:
Change Dir: /home/buildroot/autobuild/run/instance-0/output-1/build/piglit-2affee53f3ad7a96f5b397a2b6d6408af8a374b0/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/make cmTC_23f22/fast && make[1]: Entering directory `/home/buildroot/autobuild/run/instance-0/output-1/build/piglit-2affee53f3ad7a96f5b397a2b6d6408af8a374b0/CMakeFiles/CMakeTmp'
/usr/bin/make  -f CMakeFiles/cmTC_23f22.dir/build.make CMakeFiles/cmTC_23f22.dir/build
make[2]: Entering directory `/home/buildroot/autobuild/run/instance-0/output-1/build/piglit-2affee53f3ad7a96f5b397a2b6d6408af8a374b0/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_23f22.dir/src.c.o
/home/buildroot/autobuild/run/instance-0/output-1/host/bin/arm-linux-gnueabihf-gcc --sysroot=/home/buildroot/autobuild/run/instance-0/output-1/host/arm-buildroot-linux-gnueabihf/sysroot   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -D_FORTIFY_SOURCE=1 -DCMAKE_HAVE_LIBC_PTHREAD  -DNDEBUG   -o CMakeFiles/cmTC_23f22.dir/src.c.o   -c /home/buildroot/autobuild/run/instance-0/output-1/build/piglit-2affee53f3ad7a96f5b397a2b6d6408af8a374b0/CMakeFiles/CMakeTmp/src.c
Linking C executable cmTC_23f22
/home/buildroot/autobuild/run/instance-0/output-1/host/bin/cmake -E cmake_link_script CMakeFiles/cmTC_23f22.dir/link.txt --verbose=1
/home/buildroot/autobuild/run/instance-0/output-1/host/bin/arm-linux-gnueabihf-gcc --sysroot=/home/buildroot/autobuild/run/instance-0/output-1/host/arm-buildroot-linux-gnueabihf/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -D_FORTIFY_SOURCE=1 -DCMAKE_HAVE_LIBC_PTHREAD  -DNDEBUG    CMakeFiles/cmTC_23f22.dir/src.c.o  -o cmTC_23f22 
CMakeFiles/cmTC_23f22.dir/src.c.o: In function `main':
src.c:(.text.startup+0x34): undefined reference to `pthread_create'
src.c:(.text.startup+0x3c): undefined reference to `pthread_detach'
src.c:(.text.startup+0x48): undefined reference to `pthread_join'
src.c:(.text.startup+0x58): undefined reference to `pthread_atfork'
collect2: error: ld returned 1 exit status
make[2]: *** [cmTC_23f22] Error 1
make[2]: Leaving directory `/home/buildroot/autobuild/run/instance-0/output-1/build/piglit-2affee53f3ad7a96f5b397a2b6d6408af8a374b0/CMakeFiles/CMakeTmp'
make[1]: *** [cmTC_23f22/fast] Error 2
make[1]: Leaving directory `/home/buildroot/autobuild/run/instance-0/output-1/build/piglit-2affee53f3ad7a96f5b397a2b6d6408af8a374b0/CMakeFiles/CMakeTmp'


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: /home/buildroot/autobuild/run/instance-0/output-1/build/piglit-2affee53f3ad7a96f5b397a2b6d6408af8a374b0/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/make cmTC_9f27f/fast && make[1]: Entering directory `/home/buildroot/autobuild/run/instance-0/output-1/build/piglit-2affee53f3ad7a96f5b397a2b6d6408af8a374b0/CMakeFiles/CMakeTmp'
/usr/bin/make  -f CMakeFiles/cmTC_9f27f.dir/build.make CMakeFiles/cmTC_9f27f.dir/build
make[2]: Entering directory `/home/buildroot/autobuild/run/instance-0/output-1/build/piglit-2affee53f3ad7a96f5b397a2b6d6408af8a374b0/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_9f27f.dir/CheckFunctionExists.c.o
/home/buildroot/autobuild/run/instance-0/output-1/host/bin/arm-linux-gnueabihf-gcc --sysroot=/home/buildroot/autobuild/run/instance-0/output-1/host/arm-buildroot-linux-gnueabihf/sysroot   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -D_FORTIFY_SOURCE=1 -DCHECK_FUNCTION_EXISTS=pthread_create  -DNDEBUG   -o CMakeFiles/cmTC_9f27f.dir/CheckFunctionExists.c.o   -c /home/buildroot/autobuild/run/instance-0/output-1/host/share/cmake-3.16/Modules/CheckFunctionExists.c
Linking C executable cmTC_9f27f
/home/buildroot/autobuild/run/instance-0/output-1/host/bin/cmake -E cmake_link_script CMakeFiles/cmTC_9f27f.dir/link.txt --verbose=1
/home/buildroot/autobuild/run/instance-0/output-1/host/bin/arm-linux-gnueabihf-gcc --sysroot=/home/buildroot/autobuild/run/instance-0/output-1/host/arm-buildroot-linux-gnueabihf/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -D_FORTIFY_SOURCE=1 -DCHECK_FUNCTION_EXISTS=pthread_create  -DNDEBUG    CMakeFiles/cmTC_9f27f.dir/CheckFunctionExists.c.o  -o cmTC_9f27f  -lpthreads 
/home/buildroot/autobuild/run/instance-0/output-1/host/opt/ext-toolchain/bin/../lib/gcc/arm-linux-gnueabihf/7.3.1/../../../../arm-linux-gnueabihf/bin/ld: cannot find -lpthreads
collect2: error: ld returned 1 exit status
make[2]: *** [cmTC_9f27f] Error 1
make[2]: Leaving directory `/home/buildroot/autobuild/run/instance-0/output-1/build/piglit-2affee53f3ad7a96f5b397a2b6d6408af8a374b0/CMakeFiles/CMakeTmp'
make[1]: *** [cmTC_9f27f/fast] Error 2
make[1]: Leaving directory `/home/buildroot/autobuild/run/instance-0/output-1/build/piglit-2affee53f3ad7a96f5b397a2b6d6408af8a374b0/CMakeFiles/CMakeTmp'



Determining if the function fopen_s exists failed with the following output:
Change Dir: /home/buildroot/autobuild/run/instance-0/output-1/build/piglit-2affee53f3ad7a96f5b397a2b6d6408af8a374b0/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/make cmTC_296f0/fast && make[1]: Entering directory `/home/buildroot/autobuild/run/instance-0/output-1/build/piglit-2affee53f3ad7a96f5b397a2b6d6408af8a374b0/CMakeFiles/CMakeTmp'
/usr/bin/make  -f CMakeFiles/cmTC_296f0.dir/build.make CMakeFiles/cmTC_296f0.dir/build
make[2]: Entering directory `/home/buildroot/autobuild/run/instance-0/output-1/build/piglit-2affee53f3ad7a96f5b397a2b6d6408af8a374b0/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_296f0.dir/CheckFunctionExists.c.o
/home/buildroot/autobuild/run/instance-0/output-1/host/bin/arm-linux-gnueabihf-gcc --sysroot=/home/buildroot/autobuild/run/instance-0/output-1/host/arm-buildroot-linux-gnueabihf/sysroot   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -D_FORTIFY_SOURCE=1 -Wall -std=gnu99 -Werror=vla -Werror=pointer-arith -Werror=variadic-macros -DCHECK_FUNCTION_EXISTS=fopen_s  -DNDEBUG   -o CMakeFiles/cmTC_296f0.dir/CheckFunctionExists.c.o   -c /home/buildroot/autobuild/run/instance-0/output-1/host/share/cmake-3.16/Modules/CheckFunctionExists.c
Linking C executable cmTC_296f0
/home/buildroot/autobuild/run/instance-0/output-1/host/bin/cmake -E cmake_link_script CMakeFiles/cmTC_296f0.dir/link.txt --verbose=1
/home/buildroot/autobuild/run/instance-0/output-1/host/bin/arm-linux-gnueabihf-gcc --sysroot=/home/buildroot/autobuild/run/instance-0/output-1/host/arm-buildroot-linux-gnueabihf/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -D_FORTIFY_SOURCE=1 -Wall -std=gnu99 -Werror=vla -Werror=pointer-arith -Werror=variadic-macros -DCHECK_FUNCTION_EXISTS=fopen_s  -DNDEBUG    CMakeFiles/cmTC_296f0.dir/CheckFunctionExists.c.o  -o cmTC_296f0 
CMakeFiles/cmTC_296f0.dir/CheckFunctionExists.c.o: In function `main':
CheckFunctionExists.c:(.text.startup+0xc): undefined reference to `fopen_s'
collect2: error: ld returned 1 exit status
make[2]: *** [cmTC_296f0] Error 1
make[2]: Leaving directory `/home/buildroot/autobuild/run/instance-0/output-1/build/piglit-2affee53f3ad7a96f5b397a2b6d6408af8a374b0/CMakeFiles/CMakeTmp'
make[1]: *** [cmTC_296f0/fast] Error 2
make[1]: Leaving directory `/home/buildroot/autobuild/run/instance-0/output-1/build/piglit-2affee53f3ad7a96f5b397a2b6d6408af8a374b0/CMakeFiles/CMakeTmp'