CFLAGS="${CFLAGS:-%optflags}" ; export CFLAGS;
CXXFLAGS="${CXXFLAGS:-%optflags}" ; export CXXFLAGS;
LDFLAGS="${LDFLAGS:-%optflags}" ; export LDFLAGS;
CFLAGS="${CFLAGS:-%optflags}" ; export CFLAGS;
CXXFLAGS="${CXXFLAGS:-%optflags}" ; export CXXFLAGS;
LDFLAGS="${LDFLAGS:-%optflags}" ; export LDFLAGS;