pkg-buildflags , gcc opimization options

dpkg-buildflags is a tool to retrieve compilation flags to use during

       build of Debian packages.  The default flags are defined by the  vendor
       but they can be extended/overriden in several ways:

설정 파일 : /etc/dpkg/buildflags.conf

현재의 buildflags 정보 : dpkg-buildflags --list

root@cnode01-m:~/libvirt-1.0.6# dpkg-buildflags --list

CFLAGS

CPPFLAGS

CXXFLAGS

FFLAGS

LDFLAGS

참조 : GCC optimization 옵션

http://gcc.gnu.org/onlinedocs/gcc-3.4.5/gcc/Optimize-Options.html