use environment variable "${CPP}" if defined
use environment variable "${CPP}" if defined

dongguangming/pyenv,kevinburke/pyenv,recruit-mtl/pyenv,yeonsh/pyenv,takluyver/pyenv,obimod/pyenv,syndbg/goenv,syndbg/goenv,genome-vendor/pyenv,lozybean/pyenv,kevinburke/pyenv,fly19890211/pyenv,UCASREN/pyenv,cehoffman/pyenv,lepture/pyenv,chenfengyuan/pyenv,lepture/pyenv,genome-vendor/pyenv,xshwy/pyenv,hlecuanda/pyenv,sebhahn/pyenv,zmwangx/pyenv,BanzaiMan/pyenv,dnsd/pyenv,blueyed/pyenv,lozybean/pyenv,syndbg/goenv,sebhahn/pyenv,VShangxiao/pyenv,pyenv/pyenv,xshwy/pyenv,cehoffman/pyenv,sebhahn/pyenv,BanzaiMan/pyenv,chenfengyuan/pyenv,rowhit/pyenv,dongguangming/pyenv,yyuu/pyenv,recruit-mtl/pyenv,fly19890211/pyenv,VShangxiao/pyenv,habinmusic/pyenv,pyenv/pyenv,pyenv/pyenv,obimod/pyenv,zmwangx/pyenv,hlecuanda/pyenv,UCASREN/pyenv,syndbg/goenv,habinmusic/pyenv,takluyver/pyenv,yyuu/pyenv,dnsd/pyenv,yeonsh/pyenv,rowhit/pyenv