On 08/15/2011 10:53 AM, Rainer Orth wrote:
* The general approach between libtool and libiberty differs. Unless
otherwise specified (PIC is the default or doesn't work for some
reason), libtool defaults to -fPIC, while libiberty has a strange
mixture of -fPIC/-fpic and nothing, without explanation and without a
default.
I guess it's kind of historic, probably to produce smaller/faster code
on PPC and SPARC which differentiate between -fPIC/-fpic.
In general I trust libtool more, but -fPIC/-fpic differences should be
more or less harmless, and this:
* For SPARC, libiberty/configure.ac has
case "${CFLAGS}" in
*-fpic*)
PICFLAG=-fpic
;;
*)
PICFLAG=-fPIC
;;
esac ;;
actually makes some sense---so the general approach in your patch is
good. The patch is okay.
Yes, that needs to be done of course. I'm not sure if we still support
gnatlib_and_tools to build libada/gnattools. If so, we would need the
PICFLAG to be available somehow in the gcc Makefile (perhaps by providing
GCC_TARGET_PICFLAG in addition to GCC_PICFLAG in picflag.m4).
The only trace I could find is in a install.texi reference to historical
practice.
Yes, but it also matters whether AdaCore is using it. If so, I'd like
also to understand why.
Paolo
