[Bug target/40959] build fails - No rule to make target `/usr/ports/lang/gcc43/work/build/ia64-portbld-freebsd8.0/libgcc/crtfastmath.o', needed by `T_TARGET'. Stop.

["hjl dot tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #18 from hjl dot tools at gmail dot com  2010-09-08 00:32 -------
(In reply to comment #17)
> (In reply to comment #9)
> > unwind-ia64_s.o(.text+0x30b2): In function `uw_frame_state_for':
> > ../.././../gcc-4.5-20091112/libgcc/../gcc/config/ia64/unwind-ia64.c:1788:
> > undefined reference to `_Unwind_FindTableEntry'
> > unwind-ia64_s.o(.text+0x7632): In function `_Unwind_FindEnclosingFunction':
> > ../.././../gcc-4.5-20091112/libgcc/../gcc/config/ia64/unwind-ia64.c:1745:
> > undefined reference to `_Unwind_FindTableEntry'
> > /usr/bin/ld: ./libgcc_s.so.1.tmp: hidden symbol `_Unwind_FindTableEntry' 
isn't
> > defined
> > collect2: ld returned 1 exit status
> > gmake[3]: *** [libgcc_s.so] Error 1
> > gmake[3]: Leaving directory
> > `/usr/ports/lang/gcc45/work/build/ia64-portbld-freebsd9.0/libgcc'
> > gmake[2]: *** [all-stage1-target-libgcc] Error 2
> 
> After making the change to libgcc/config.host that is also described in
> comment #5 I get the same.
> 
> libc indeed does feature  _Unwind_FindTableEntry() as I can easily verify
> with the following program:
> 
>   void _Unwind_FindTableEntry();
>   int main() { _Unwind_FindTableEntry(); }
> 
> Just, why do we then get this link failure?  Adding -v I see that 
> /lib/libc.so.7 is explicitly part of the collect2 invocation.
> 

Because _Unwind_FindTableEntry is marked hidden.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40959