On Wed, Nov 21, 2012 at 8:02 PM, Ian Lance Taylor <i...@google.com> wrote: >> The main advantage is that you can compile a program with CFLAGS="-O2 -g >> -fPIE", and libtool's adding of -fPIC for shared libraries will work >> reliably. If -fPIE can still override -fPIC, the result depends on >> whether -fPIC comes before or after CFLAGS. > > ...which is exactly how all our other options work. The last one > wins. Why should these be different?
Most other options are not added by the build system automatically with the presumption that they always override the default. > Using -fPIE in CFLAGS for > libtool seems like a very specific use case It's actually a very common use case for distributions that want to harden some binaries. Paolo
