Determining if the include file io.h exists failed with the following output:
Change Dir: /tmp/instance-6/output-1/build/cmocka-1.1.5/buildroot-build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/make -f Makefile cmTC_f75c1/fast && make[1]: Entering directory '/tmp/instance-6/output-1/build/cmocka-1.1.5/buildroot-build/CMakeFiles/CMakeTmp'
/usr/bin/make  -f CMakeFiles/cmTC_f75c1.dir/build.make CMakeFiles/cmTC_f75c1.dir/build
make[2]: Entering directory '/tmp/instance-6/output-1/build/cmocka-1.1.5/buildroot-build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_f75c1.dir/CheckIncludeFile.c.o
/tmp/instance-6/output-1/host/bin/arm-linux-gcc --sysroot=/tmp/instance-6/output-1/host/arm-buildroot-linux-gnueabi/sysroot   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -g0 -D_FORTIFY_SOURCE=1   -DNDEBUG -fPIE -o CMakeFiles/cmTC_f75c1.dir/CheckIncludeFile.c.o -c /tmp/instance-6/output-1/build/cmocka-1.1.5/buildroot-build/CMakeFiles/CMakeTmp/CheckIncludeFile.c
/tmp/instance-6/output-1/build/cmocka-1.1.5/buildroot-build/CMakeFiles/CMakeTmp/CheckIncludeFile.c:1:10: fatal error: io.h: No such file or directory
    1 | #include <io.h>
      |          ^~~~~~
compilation terminated.
make[2]: *** [CMakeFiles/cmTC_f75c1.dir/build.make:78: CMakeFiles/cmTC_f75c1.dir/CheckIncludeFile.c.o] Error 1
make[2]: Leaving directory '/tmp/instance-6/output-1/build/cmocka-1.1.5/buildroot-build/CMakeFiles/CMakeTmp'
make[1]: *** [Makefile:127: cmTC_f75c1/fast] Error 2
make[1]: Leaving directory '/tmp/instance-6/output-1/build/cmocka-1.1.5/buildroot-build/CMakeFiles/CMakeTmp'