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

Run Build Command(s):/usr/bin/gmake cmTC_712c7/fast && gmake[1]: Entering directory '/home/giuliobenetti/autobuild/run/instance-2/output-1/build/piglit-2affee53f3ad7a96f5b397a2b6d6408af8a374b0/CMakeFiles/CMakeTmp'
/usr/bin/gmake  -f CMakeFiles/cmTC_712c7.dir/build.make CMakeFiles/cmTC_712c7.dir/build
gmake[2]: Entering directory '/home/giuliobenetti/autobuild/run/instance-2/output-1/build/piglit-2affee53f3ad7a96f5b397a2b6d6408af8a374b0/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_712c7.dir/CheckFunctionExists.c.o
/home/giuliobenetti/autobuild/run/instance-2/output-1/host/bin/aarch64-linux-gcc --sysroot=/home/giuliobenetti/autobuild/run/instance-2/output-1/host/aarch64-buildroot-linux-gnu/sysroot   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -g0 -D_FORTIFY_SOURCE=1 -Wall -std=gnu99 -Werror=vla -Werror=pointer-arith -Werror=variadic-macros -DCHECK_FUNCTION_EXISTS=fopen_s  -DNDEBUG   -o CMakeFiles/cmTC_712c7.dir/CheckFunctionExists.c.o   -c /home/giuliobenetti/autobuild/run/instance-2/output-1/host/share/cmake-3.16/Modules/CheckFunctionExists.c
Linking C executable cmTC_712c7
/home/giuliobenetti/autobuild/run/instance-2/output-1/host/bin/cmake -E cmake_link_script CMakeFiles/cmTC_712c7.dir/link.txt --verbose=1
/home/giuliobenetti/autobuild/run/instance-2/output-1/host/bin/aarch64-linux-gcc --sysroot=/home/giuliobenetti/autobuild/run/instance-2/output-1/host/aarch64-buildroot-linux-gnu/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -g0 -D_FORTIFY_SOURCE=1 -Wall -std=gnu99 -Werror=vla -Werror=pointer-arith -Werror=variadic-macros -DCHECK_FUNCTION_EXISTS=fopen_s  -DNDEBUG    CMakeFiles/cmTC_712c7.dir/CheckFunctionExists.c.o  -o cmTC_712c7 
/home/giuliobenetti/autobuild/run/instance-2/output-1/host/opt/ext-toolchain/bin/../lib/gcc/aarch64-buildroot-linux-gnu/10.3.0/../../../../aarch64-buildroot-linux-gnu/bin/ld: CMakeFiles/cmTC_712c7.dir/CheckFunctionExists.c.o: in function `main':
CheckFunctionExists.c:(.text.startup+0x14): undefined reference to `fopen_s'
collect2: error: ld returned 1 exit status
gmake[2]: *** [CMakeFiles/cmTC_712c7.dir/build.make:90: cmTC_712c7] Error 1
gmake[2]: Leaving directory '/home/giuliobenetti/autobuild/run/instance-2/output-1/build/piglit-2affee53f3ad7a96f5b397a2b6d6408af8a374b0/CMakeFiles/CMakeTmp'
gmake[1]: *** [Makefile:124: cmTC_712c7/fast] Error 2
gmake[1]: Leaving directory '/home/giuliobenetti/autobuild/run/instance-2/output-1/build/piglit-2affee53f3ad7a96f5b397a2b6d6408af8a374b0/CMakeFiles/CMakeTmp'