Performing C++ SOURCE FILE Test CC_HAS_STACK_REALIGN failed with the following output:
Change Dir: /accts/mlweber1/instance-0/output/build/x265-2.8/source/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_8f796/fast"
make[1]: Entering directory `/accts/mlweber1/instance-0/output/build/x265-2.8/source/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_8f796.dir/build.make CMakeFiles/cmTC_8f796.dir/build
make[2]: Entering directory `/accts/mlweber1/instance-0/output/build/x265-2.8/source/CMakeFiles/CMakeTmp'
Building CXX object CMakeFiles/cmTC_8f796.dir/src.cxx.o
/accts/mlweber1/instance-0/output/host/bin/arm-linux-g++ --sysroot=/accts/mlweber1/instance-0/output/host/arm-buildroot-linux-musleabihf/sysroot    -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -DCC_HAS_STACK_REALIGN  -DNDEBUG   -mstackrealign -o CMakeFiles/cmTC_8f796.dir/src.cxx.o -c /accts/mlweber1/instance-0/output/build/x265-2.8/source/CMakeFiles/CMakeTmp/src.cxx
arm-linux-g++.br_real: error: unrecognized command line option '-mstackrealign'
make[2]: *** [CMakeFiles/cmTC_8f796.dir/src.cxx.o] Error 1
make[2]: Leaving directory `/accts/mlweber1/instance-0/output/build/x265-2.8/source/CMakeFiles/CMakeTmp'
make[1]: *** [cmTC_8f796/fast] Error 2
make[1]: Leaving directory `/accts/mlweber1/instance-0/output/build/x265-2.8/source/CMakeFiles/CMakeTmp'

Source file was:
int main() { return 0; }