------- Comment #7 from wilson at gcc dot gnu dot org 2005-11-09 01:45 -------
I see the problem now. It is present in the FSF gcc-3.4.x sources.
The problem is that init_gcc_specs in gcc.c rewrites the LIBGCC_SPEC rule. It
looks for the first -lgcc, and replaces it with target independent rules for
shared and static libgcc.
The config/ia64/hpux.h file redefines LIBGCC_SPEC as
#define LIBGCC_SPEC \
"%{shared-libgcc:%{!mlp64:-lgcc_s}%{mlp64:-lgcc_s_hpux64} -lgcc} \
%{!shared-libgcc:-lgcc}"
So after the substitution, we now have %{shared-libgcc ... %{static-libgcc
...}} which is obviously wrong.
If the config/ia64/hpux.h file is changed to look something like
#define LIBGCC_SPEC \
"%{shared-libgcc:%{!mlp64:-lgcc_s}%{mlp64:-lgcc_s_hpux64}} -lgcc"
then it will work much better. I think this can be simplified further without
loss of functionality to
#define LIBGCC_SPEC \
"%{shared-libgcc:%{mlp64:-lgcc_s_hpux64}} -lgcc"
The important part here is that -lgcc must not appear inside any braces,
because it will be substituted by init_gcc_specs.
Alternatively, we could try disabling the init_gcc_specs rewriting for the
ia64-hpux target, and then putting the entire rule we want in the
config/ia64/hpux.h file, but I don't think that big of a patch is needed.
A better alternative would be deleting the LIBGCC_SPEC rule in
config/ia64/hpux.h, but I don't know if that will work. That might result in
the libgcc_s_hpux64 file not being used anymore. I also don't know whether
that matters. I would guess that the multilibbing support should find and use
it automatically, so in theory it shouldn't be needed, but I am unable to
check.
gcc-4.0 and later do not have a problem, because they don't define LIBGCC_SPEC
in the config/ia64/hpux.h file.
I can't test the suggested patches, as I don't have an ia64-hpux machine.
--
wilson at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |wilson at gcc dot gnu dot
| |org
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2005-11-09 01:45:26
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24718
