http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47558
--- Comment #50 from Iain Sandoe <iains at gcc dot gnu.org> 2011-02-04 10:52:38 UTC --- (In reply to comment #49) > (In reply to comment #38) > > [ you might want to re-check > http://gcc.gnu.org/ml/gcc-patches/2011-02/msg00274.html would work with > -flat_namespace - it's not obvious how it resolves that issue]. scratch that - I see it effectively does %L %G %L (which would be a more conventional way to do what you've posted). i.e. the patch in comment #17 (with no other changes). *sigh*. if %L %G %L now apparently works - without Java regressions, then all the effort to sort out pruning of early links to libSystem should be irrelevant. I guess bugs have been fixed in the 10.6.{5,6} releases. the (alternate) patch below produces (on 10.6.6): $ ./gcc/xgcc -Bgcc /Volumes/ScratchCS/tests/linkage.c -o tt -v ... ... -lgcc_ext.10.5 -no_compact_unwind -lSystem -lgcc -v $ ./gcc/xgcc -Bgcc /Volumes/ScratchCS/tests/linkage.c -o tt -v -flat_namespace ... ... -lgcc_s.10.5 -lgcc_ext.10.5 -no_compact_unwind -lSystem -lgcc -v $ ./gcc/xgcc -Bgcc /Volumes/ScratchCS/tests/linkage.c -o tt -v -mmacosx-version-min=10.5 ... ... -macosx_version_min 10.5 ... -lgcc_s.10.5 -lgcc_ext.10.5 -lgcc -lSystem -v It seems to be OK on 10.6 for c++ tests. *** However, if the patch at comment #17 works for all langs incl. Java *and* -flat_namespace without regressions, then it is probably a better solution. Index: gcc/config/darwin.h =================================================================== --- gcc/config/darwin.h (revision 169811) +++ gcc/config/darwin.h (working copy) @@ -327,15 +332,19 @@ extern GTY(()) int darwin_ms_struct; "%{static-libgcc|static: -lgcc_eh -lgcc; \ shared-libgcc|fexceptions|fgnu-runtime: \ %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4) \ - %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5) \ + %{Zflat_namespace|Zforce_flat_namespace: \ + %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5); \ + :%:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5)}\ %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4) \ %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \ - -lgcc ; \ + %:version-compare(< 10.6 mmacosx-version-min= -lgcc) ; \ :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \ - %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5) \ + %{Zflat_namespace|Zforce_flat_namespace: \ + %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5); \ + :%:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5)}\ %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4) \ %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \ - -lgcc }" + %:version-compare(< 10.6 mmacosx-version-min= -lgcc) }" /* We specify crt0.o as -lcrt0.o so that ld will search the library path. Index: gcc/config/darwin10.h =================================================================== --- gcc/config/darwin10.h (revision 169811) +++ gcc/config/darwin10.h (working copy) @@ -21,5 +21,13 @@ along with GCC; see the file COPYING3. If not see /* Fix PR41260 by passing -no_compact_unwind on darwin10 and later until unwinder in libSystem is fixed to digest new epilog unwinding notes. */ +/* Also ensure that the FSF static libgcc is linked last (unless the user + has specified -static-libgcc, in which case it will be linked earlier + by the REAL_LIBGCC_SPEC). */ + #undef LIB_SPEC -#define LIB_SPEC "%{!static:-no_compact_unwind -lSystem}" +#define LIB_SPEC \ +"%{!static: \ + %:version-compare(>= 10.6 mmacosx-version-min= -no_compact_unwind) \ + -lSystem \ + %:version-compare(>= 10.6 mmacosx-version-min= -lgcc) }"
