Why isn't this just CFLAGS+=-fPIC ?

In D21402#467690, @andrew_tao173.riddles.org.uk wrote:

Why isn't this just CFLAGS+=-fPIC ?

Because e.g. powerpc64 doesn't need it.

In D21402#467883, @pkubaj wrote:

In D21402#467690, @andrew_tao173.riddles.org.uk wrote:

Why isn't this just CFLAGS+=-fPIC ?

Because e.g. powerpc64 doesn't need it.

What that says to me is that we need a standard ${CFLAGS_PIC} variable or some such, which is defined to -fPIC on most platforms and empty on powerpc64, rather than pollute every port makefile with an ever-changing list of which arches need -fPIC and which don't.