Performing C SOURCE FILE Test ARCH_X86 failed with the following output:
Change Dir: /home/buildroot/autobuild/instance-1/output-1/build/fastd-18/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_c68c6/fast"
make[1]: Entering directory '/home/buildroot/autobuild/instance-1/output-1/build/fastd-18/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_c68c6.dir/build.make CMakeFiles/cmTC_c68c6.dir/build
make[2]: Entering directory '/home/buildroot/autobuild/instance-1/output-1/build/fastd-18/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_c68c6.dir/src.c.o
/home/buildroot/autobuild/instance-1/output-1/host/bin/x86_64-linux-gcc --sysroot=/home/buildroot/autobuild/instance-1/output-1/host/x86_64-buildroot-linux-musl/sysroot   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -DARCH_X86  -DNDEBUG   -o CMakeFiles/cmTC_c68c6.dir/src.c.o   -c /home/buildroot/autobuild/instance-1/output-1/build/fastd-18/CMakeFiles/CMakeTmp/src.c
/home/buildroot/autobuild/instance-1/output-1/build/fastd-18/CMakeFiles/CMakeTmp/src.c:3:2: error: #error not x86
 #error not x86
  ^~~~~
CMakeFiles/cmTC_c68c6.dir/build.make:65: recipe for target 'CMakeFiles/cmTC_c68c6.dir/src.c.o' failed
make[2]: *** [CMakeFiles/cmTC_c68c6.dir/src.c.o] Error 1
make[2]: Leaving directory '/home/buildroot/autobuild/instance-1/output-1/build/fastd-18/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_c68c6/fast' failed
make[1]: *** [cmTC_c68c6/fast] Error 2
make[1]: Leaving directory '/home/buildroot/autobuild/instance-1/output-1/build/fastd-18/CMakeFiles/CMakeTmp'

Source file was:

#ifndef __i386__
#error not x86
#endif

int main() {return 0;}