Determining if the system is big endian passed with the following output:
Change Dir: /home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/domoticz-4.9700/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_97a79/fast"
make[1]: Entering directory '/home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/domoticz-4.9700/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_97a79.dir/build.make CMakeFiles/cmTC_97a79.dir/build
make[2]: Entering directory '/home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/domoticz-4.9700/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_97a79.dir/TestEndianess.c.o
/home/rclinux/rc-buildroot-test/scripts/instance-1/output/host/bin/mips64el-ctng_n32-linux-gnu-gcc  --sysroot=/home/rclinux/rc-buildroot-test/scripts/instance-1/output/host/mips64el-buildroot-linux-gnu/sysroot   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os   -DNDEBUG   -o CMakeFiles/cmTC_97a79.dir/TestEndianess.c.o   -c /home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/domoticz-4.9700/CMakeFiles/CMakeTmp/TestEndianess.c
Linking C executable cmTC_97a79
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_97a79.dir/link.txt --verbose=1
/home/rclinux/rc-buildroot-test/scripts/instance-1/output/host/bin/mips64el-ctng_n32-linux-gnu-gcc  --sysroot=/home/rclinux/rc-buildroot-test/scripts/instance-1/output/host/mips64el-buildroot-linux-gnu/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os   -DNDEBUG    CMakeFiles/cmTC_97a79.dir/TestEndianess.c.o  -o cmTC_97a79 -rdynamic 
make[2]: Leaving directory '/home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/domoticz-4.9700/CMakeFiles/CMakeTmp'
make[1]: Leaving directory '/home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/domoticz-4.9700/CMakeFiles/CMakeTmp'

TestEndianess.c:
/* A 16 bit integer is required. */
typedef unsigned short cmakeint16;

/* On a little endian machine, these 16bit ints will give "THIS IS LITTLE ENDIAN."
   On a big endian machine the characters will be exchanged pairwise. */
const cmakeint16 info_little[] =  {0x4854, 0x5349, 0x4920, 0x2053, 0x494c, 0x5454, 0x454c, 0x4520, 0x444e, 0x4149, 0x2e4e, 0x0000};

/* on a big endian machine, these 16bit ints will give "THIS IS BIG ENDIAN."
   On a little endian machine the characters will be exchanged pairwise. */
const cmakeint16 info_big[] =     {0x5448, 0x4953, 0x2049, 0x5320, 0x4249, 0x4720, 0x454e, 0x4449, 0x414e, 0x2e2e, 0x0000};

#ifdef __CLASSIC_C__
int main(argc, argv) int argc; char *argv[];
#else
int main(int argc, char *argv[])
#endif
{
  int require = 0;
  require += info_little[argc];
  require += info_big[argc];
  (void)argv;
  return require;
}


Determining if the pthread_create exist failed with the following output:
Change Dir: /home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/domoticz-4.9700/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_c7420/fast"
make[1]: Entering directory '/home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/domoticz-4.9700/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_c7420.dir/build.make CMakeFiles/cmTC_c7420.dir/build
make[2]: Entering directory '/home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/domoticz-4.9700/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_c7420.dir/CheckSymbolExists.c.o
/home/rclinux/rc-buildroot-test/scripts/instance-1/output/host/bin/mips64el-ctng_n32-linux-gnu-gcc  --sysroot=/home/rclinux/rc-buildroot-test/scripts/instance-1/output/host/mips64el-buildroot-linux-gnu/sysroot   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os   -DNDEBUG   -o CMakeFiles/cmTC_c7420.dir/CheckSymbolExists.c.o   -c /home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/domoticz-4.9700/CMakeFiles/CMakeTmp/CheckSymbolExists.c
Linking C executable cmTC_c7420
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_c7420.dir/link.txt --verbose=1
/home/rclinux/rc-buildroot-test/scripts/instance-1/output/host/bin/mips64el-ctng_n32-linux-gnu-gcc  --sysroot=/home/rclinux/rc-buildroot-test/scripts/instance-1/output/host/mips64el-buildroot-linux-gnu/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os   -DNDEBUG    CMakeFiles/cmTC_c7420.dir/CheckSymbolExists.c.o  -o cmTC_c7420 -rdynamic 
CMakeFiles/cmTC_c7420.dir/CheckSymbolExists.c.o: In function `main':
CheckSymbolExists.c:(.text.startup+0x8): undefined reference to `pthread_create'
collect2: error: ld returned 1 exit status
CMakeFiles/cmTC_c7420.dir/build.make:97: recipe for target 'cmTC_c7420' failed
make[2]: *** [cmTC_c7420] Error 1
make[2]: Leaving directory '/home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/domoticz-4.9700/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_c7420/fast' failed
make[1]: *** [cmTC_c7420/fast] Error 2
make[1]: Leaving directory '/home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/domoticz-4.9700/CMakeFiles/CMakeTmp'

File /home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/domoticz-4.9700/CMakeFiles/CMakeTmp/CheckSymbolExists.c:
/* */
#include <pthread.h>

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

Determining if the function pthread_create exists in the pthreads failed with the following output:
Change Dir: /home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/domoticz-4.9700/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_fd820/fast"
make[1]: Entering directory '/home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/domoticz-4.9700/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_fd820.dir/build.make CMakeFiles/cmTC_fd820.dir/build
make[2]: Entering directory '/home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/domoticz-4.9700/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_fd820.dir/CheckFunctionExists.c.o
/home/rclinux/rc-buildroot-test/scripts/instance-1/output/host/bin/mips64el-ctng_n32-linux-gnu-gcc  --sysroot=/home/rclinux/rc-buildroot-test/scripts/instance-1/output/host/mips64el-buildroot-linux-gnu/sysroot   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -DCHECK_FUNCTION_EXISTS=pthread_create  -DNDEBUG   -o CMakeFiles/cmTC_fd820.dir/CheckFunctionExists.c.o   -c /usr/share/cmake-3.5/Modules/CheckFunctionExists.c
Linking C executable cmTC_fd820
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_fd820.dir/link.txt --verbose=1
/home/rclinux/rc-buildroot-test/scripts/instance-1/output/host/bin/mips64el-ctng_n32-linux-gnu-gcc  --sysroot=/home/rclinux/rc-buildroot-test/scripts/instance-1/output/host/mips64el-buildroot-linux-gnu/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -DCHECK_FUNCTION_EXISTS=pthread_create  -DNDEBUG    CMakeFiles/cmTC_fd820.dir/CheckFunctionExists.c.o  -o cmTC_fd820 -rdynamic -lpthreads 
/home/rclinux/rc-buildroot-test/scripts/instance-1/output/host/opt/ext-toolchain/bin/../lib/gcc/mips64el-ctng_n32-linux-gnu/4.8.2/../../../../mips64el-ctng_n32-linux-gnu/bin/ld: cannot find -lpthreads
collect2: error: ld returned 1 exit status
CMakeFiles/cmTC_fd820.dir/build.make:97: recipe for target 'cmTC_fd820' failed
make[2]: *** [cmTC_fd820] Error 1
make[2]: Leaving directory '/home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/domoticz-4.9700/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_fd820/fast' failed
make[1]: *** [cmTC_fd820/fast] Error 2
make[1]: Leaving directory '/home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/domoticz-4.9700/CMakeFiles/CMakeTmp'