This is the mail archive of the libc-hacker@sourceware.cygnus.com mailing list for the glibc project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]

PIC default check


I assume the change documented below has been added because I mentioned
that PIC code is default on MIPS?  Or is there another reason as well?

1997-11-06 06:13  H.J. Lu  <hjl@gnu.ai.mit.edu>

        * config.make.in (build-pic-default): New, defined with
        pic_default.

        * configure.in (pic_default): New, set to yes if PIC is
        default.

        * Makeconfig (CPPFLAGS-.o, CPPFLAGS-.op, CPPFLAGS-.og,
        CPPFLAGS-.ob): Add -DPIC if $(build-pic-default) is yes.

As things are, this change does alot more bad than good things for MIPS.
Certain files like init-first.c now always get compiled the same no matter
whether they're going into the static lib or a shared lib.

What still needs to be done to make this change actually useful is trying
to avoid multiple compilation where the same flags would have been used for
.o and os object files.  Furthermore, since the PIC code model and shared
libs are related, but different things adding a second preprocessor define
like SHARED (CPPFLAGS-.os += -DSHARED) that indicates compilation for a
shared library would be helpful.  The places where the difference between
PIC and SHARED matters like in init-first.c, dl-close.c etc. can then be
cleaned up.  Does anybody see problems with that?

  Ralf


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]