Determining if the __x86_64__ exist failed with the following output:
Change Dir: /srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_a2bdb/fast"
make[1]: Entering directory '/srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_a2bdb.dir/build.make CMakeFiles/cmTC_a2bdb.dir/build
make[2]: Entering directory '/srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_a2bdb.dir/CheckSymbolExists.c.o
/srv/storage/autobuild/run/instance-0/output-1/host/bin/powerpc-linux-gcc --sysroot=/srv/storage/autobuild/run/instance-0/output-1/host/powerpc-buildroot-linux-uclibc/sysroot   -D_POSIX_C_SOURCE=200112L -fPIC -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -Werror -Werror   -DNDEBUG -fPIE   -o CMakeFiles/cmTC_a2bdb.dir/CheckSymbolExists.c.o   -c /srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c
/srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c: In function 'main':
/srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c:7:19: error: '__x86_64__' undeclared (first use in this function)
   return ((int*)(&__x86_64__))[argc];
                   ^~~~~~~~~~
/srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c:7:19: note: each undeclared identifier is reported only once for each function it appears in
make[2]: *** [CMakeFiles/cmTC_a2bdb.dir/build.make:66: CMakeFiles/cmTC_a2bdb.dir/CheckSymbolExists.c.o] Error 1
make[2]: Leaving directory '/srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp'
make[1]: *** [Makefile:121: cmTC_a2bdb/fast] Error 2
make[1]: Leaving directory '/srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp'

File /srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c:
/* */

int main(int argc, char** argv)
{
  (void)argv;
#ifndef __x86_64__
  return ((int*)(&__x86_64__))[argc];
#else
  (void)argc;
  return 0;
#endif
}

Determining if the __i386__ exist failed with the following output:
Change Dir: /srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_ac305/fast"
make[1]: Entering directory '/srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_ac305.dir/build.make CMakeFiles/cmTC_ac305.dir/build
make[2]: Entering directory '/srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_ac305.dir/CheckSymbolExists.c.o
/srv/storage/autobuild/run/instance-0/output-1/host/bin/powerpc-linux-gcc --sysroot=/srv/storage/autobuild/run/instance-0/output-1/host/powerpc-buildroot-linux-uclibc/sysroot   -D_POSIX_C_SOURCE=200112L -fPIC -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -Werror -Werror   -DNDEBUG -fPIE   -o CMakeFiles/cmTC_ac305.dir/CheckSymbolExists.c.o   -c /srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c
/srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c: In function 'main':
/srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c:7:19: error: '__i386__' undeclared (first use in this function); did you mean '__DATE__'?
   return ((int*)(&__i386__))[argc];
                   ^~~~~~~~
                   __DATE__
/srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c:7:19: note: each undeclared identifier is reported only once for each function it appears in
make[2]: *** [CMakeFiles/cmTC_ac305.dir/build.make:66: CMakeFiles/cmTC_ac305.dir/CheckSymbolExists.c.o] Error 1
make[2]: Leaving directory '/srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp'
make[1]: *** [Makefile:121: cmTC_ac305/fast] Error 2
make[1]: Leaving directory '/srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp'

File /srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c:
/* */

int main(int argc, char** argv)
{
  (void)argv;
#ifndef __i386__
  return ((int*)(&__i386__))[argc];
#else
  (void)argc;
  return 0;
#endif
}

Determining if the __arm__ exist failed with the following output:
Change Dir: /srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_76a97/fast"
make[1]: Entering directory '/srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_76a97.dir/build.make CMakeFiles/cmTC_76a97.dir/build
make[2]: Entering directory '/srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_76a97.dir/CheckSymbolExists.c.o
/srv/storage/autobuild/run/instance-0/output-1/host/bin/powerpc-linux-gcc --sysroot=/srv/storage/autobuild/run/instance-0/output-1/host/powerpc-buildroot-linux-uclibc/sysroot   -D_POSIX_C_SOURCE=200112L -fPIC -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -Werror -Werror   -DNDEBUG -fPIE   -o CMakeFiles/cmTC_76a97.dir/CheckSymbolExists.c.o   -c /srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c
/srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c: In function 'main':
/srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c:7:19: error: '__arm__' undeclared (first use in this function); did you mean '__DATE__'?
   return ((int*)(&__arm__))[argc];
                   ^~~~~~~
                   __DATE__
/srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c:7:19: note: each undeclared identifier is reported only once for each function it appears in
make[2]: *** [CMakeFiles/cmTC_76a97.dir/build.make:66: CMakeFiles/cmTC_76a97.dir/CheckSymbolExists.c.o] Error 1
make[2]: Leaving directory '/srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp'
make[1]: *** [Makefile:121: cmTC_76a97/fast] Error 2
make[1]: Leaving directory '/srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp'

File /srv/storage/autobuild/run/instance-0/output-1/build/azure-iot-sdk-c-LTS_07_2020_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c:
/* */

int main(int argc, char** argv)
{
  (void)argv;
#ifndef __arm__
  return ((int*)(&__arm__))[argc];
#else
  (void)argc;
  return 0;
#endif
}