environment-variables - GCC 8 O2
PATH=/usr/local/opt/openssl/bin:/usr/local/opt/gettext/bin:/usr/local/sbin:/usr/local/opt/llvm/bin:/usr/local/Cellar/gcc9/9-20190310/bin:/usr/local/Cellar/gcc/8.2.0/bin:/usr/local/bin:/usr/local/opt/openssl/bin:/usr/local/opt/gettext/bin:/usr/local/sbin:/usr/local/opt/llvm/bin:/usr/local/Cellar/gcc9/9-20190310/bin:/usr/local/Cellar/gcc/8.2.0/bin:/usr/local/bin:/usr/local/opt/openssl/bin:/usr/local/opt/gettext/bin:/usr/local/sbin:/usr/local/opt/llvm/bin:/usr/local/Cellar/gcc9/9-20190310/bin:/usr/local/Cellar/gcc/8.2.0/bin:/usr/local/bin:/usr/local/opt/openssl/bin:/usr/local/opt/gettext/bin:/usr/local/sbin:/usr/local/opt/llvm/bin:/usr/local/Cellar/gcc9/9-20190310/bin:/usr/local/Cellar/gcc/8.2.0/bin:/usr/local/bin:/usr/local/opt/openssl/bin:/usr/local/opt/gettext/bin:/usr/local/sbin:/usr/local/opt/llvm/bin:/usr/local/Cellar/gcc9/9-20190310/bin:/usr/local/Cellar/gcc/8.2.0/bin:/Developer/NVIDIA/CUDA-10.1/bin:/usr/local/bin:/usr/local/opt/openssl/bin:/usr/local/opt/gettext/bin:/usr/local/sbin:/usr/local/opt/llvm/bin:/usr/local/Cellar/gcc9/9-20190310/bin:/usr/local/Cellar/gcc/8.2.0/bin:/Developer/NVIDIA/CUDA-10.1/bin:/usr/local/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/TeX/texbin:/opt/X11/bin
CFLAGS=-O2
CC=gcc-8
CXX=g++-8