Determining if the system is big endian passed with the following output:
Change Dir: /var/tmp/portage/sci-libs/mathgl-2.3.4/work/mathgl-2.3.4_build/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/gmake" "cmTC_0eb97/fast"
/usr/bin/gmake -f CMakeFiles/cmTC_0eb97.dir/build.make CMakeFiles/cmTC_0eb97.dir/build
gmake[1]: Entering directory '/var/tmp/portage/sci-libs/mathgl-2.3.4/work/mathgl-2.3.4_build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_0eb97.dir/TestEndianess.c.o
/usr/bin/x86_64-pc-linux-gnu-gcc     -DNDEBUG -march=native -O2 -pipe     -o CMakeFiles/cmTC_0eb97.dir/TestEndianess.c.o -c /var/tmp/portage/sci-libs/mathgl-2.3.4/work/mathgl-2.3.4_build/CMakeFiles/CMakeTmp/TestEndianess.c
Linking C executable cmTC_0eb97
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_0eb97.dir/link.txt --verbose=1
/usr/bin/x86_64-pc-linux-gnu-gcc  -march=native -O2 -pipe     -Wl,-O1 -Wl,--as-needed  CMakeFiles/cmTC_0eb97.dir/TestEndianess.c.o  -o cmTC_0eb97 -rdynamic 
gmake[1]: Leaving directory '/var/tmp/portage/sci-libs/mathgl-2.3.4/work/mathgl-2.3.4_build/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 function sin exists failed with the following output:
Change Dir: /var/tmp/portage/sci-libs/mathgl-2.3.4/work/mathgl-2.3.4_build/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/gmake" "cmTC_cc3a3/fast"
/usr/bin/gmake -f CMakeFiles/cmTC_cc3a3.dir/build.make CMakeFiles/cmTC_cc3a3.dir/build
gmake[1]: Entering directory '/var/tmp/portage/sci-libs/mathgl-2.3.4/work/mathgl-2.3.4_build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_cc3a3.dir/CheckFunctionExists.c.o
/usr/bin/x86_64-pc-linux-gnu-gcc     -DNDEBUG -march=native -O2 -pipe  -DCHECK_FUNCTION_EXISTS=sin   -o CMakeFiles/cmTC_cc3a3.dir/CheckFunctionExists.c.o -c /usr/share/cmake/Modules/CheckFunctionExists.c
<command-line>:0:23: warning: conflicting types for built-in function ‘sin’
/usr/share/cmake/Modules/CheckFunctionExists.c:6:6: note: in expansion of macro ‘CHECK_FUNCTION_EXISTS’
 char CHECK_FUNCTION_EXISTS();
      ^
Linking C executable cmTC_cc3a3
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_cc3a3.dir/link.txt --verbose=1
/usr/bin/x86_64-pc-linux-gnu-gcc  -march=native -O2 -pipe  -DCHECK_FUNCTION_EXISTS=sin   -Wl,-O1 -Wl,--as-needed  CMakeFiles/cmTC_cc3a3.dir/CheckFunctionExists.c.o  -o cmTC_cc3a3 -rdynamic 
CMakeFiles/cmTC_cc3a3.dir/CheckFunctionExists.c.o: In function `main':
CheckFunctionExists.c:(.text.startup+0xe): undefined reference to `sin'
collect2: error: ld returned 1 exit status
CMakeFiles/cmTC_cc3a3.dir/build.make:97: recipe for target 'cmTC_cc3a3' failed
gmake[1]: *** [cmTC_cc3a3] Error 1
gmake[1]: Leaving directory '/var/tmp/portage/sci-libs/mathgl-2.3.4/work/mathgl-2.3.4_build/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_cc3a3/fast' failed
gmake: *** [cmTC_cc3a3/fast] Error 2


Performing C++ SOURCE FILE Test MGL_HAVE_RVAL failed with the following output:
Change Dir: /var/tmp/portage/sci-libs/mathgl-2.3.4/work/mathgl-2.3.4_build/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/gmake" "cmTC_756ed/fast"
/usr/bin/gmake -f CMakeFiles/cmTC_756ed.dir/build.make CMakeFiles/cmTC_756ed.dir/build
gmake[1]: Entering directory '/var/tmp/portage/sci-libs/mathgl-2.3.4/work/mathgl-2.3.4_build/CMakeFiles/CMakeTmp'
Building CXX object CMakeFiles/cmTC_756ed.dir/src.cxx.o
/usr/bin/x86_64-pc-linux-gnu-g++     -DNDEBUG -march=native -O2 -pipe  -DMGL_HAVE_RVAL   -o CMakeFiles/cmTC_756ed.dir/src.cxx.o -c /var/tmp/portage/sci-libs/mathgl-2.3.4/work/mathgl-2.3.4_build/CMakeFiles/CMakeTmp/src.cxx
/var/tmp/portage/sci-libs/mathgl-2.3.4/work/mathgl-2.3.4_build/CMakeFiles/CMakeTmp/src.cxx:1:34: error: expected ‘,’ or ‘...’ before ‘&&’ token
 struct test { test() {} test(test&& a){} };
                                  ^
/var/tmp/portage/sci-libs/mathgl-2.3.4/work/mathgl-2.3.4_build/CMakeFiles/CMakeTmp/src.cxx:1:38: error: invalid constructor; you probably meant ‘test (const test&)’
 struct test { test() {} test(test&& a){} };
                                      ^
CMakeFiles/cmTC_756ed.dir/build.make:65: recipe for target 'CMakeFiles/cmTC_756ed.dir/src.cxx.o' failed
gmake[1]: *** [CMakeFiles/cmTC_756ed.dir/src.cxx.o] Error 1
gmake[1]: Leaving directory '/var/tmp/portage/sci-libs/mathgl-2.3.4/work/mathgl-2.3.4_build/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_756ed/fast' failed
gmake: *** [cmTC_756ed/fast] Error 2

Source file was:
struct test { test() {} test(test&& a){} };
int main() { test t;	return 0; }