I read http://gcc.gnu.org/install/build.html but wasn't completely enlightened.
If I'm building C and C++ (i.e. configuring with --enable-languages=c,c++) and I want to build gcc, g++, and libstdc++ with -O3 instead of the default (which I believe is -g -O2), is this correct: make "BOOT_CFLAGS=-O3" "CFLAGS_FOR_TARGET=-O3" "CXXFLAGS_FOR_TARGET=-O3" Or should I add/remove variables? Thanks, Gordon Magnusson