Caused by:
+2007-02-16 Geoffrey Keating <geoffk (AT) apple (DOT) com>
+
+ * config/darwin.h (LINK_SPEC): Always pass -macosx_version_min
+ to linker.
Worked in:
Failed with:
And that is the only patch between those two testresults.
From the .log:
FAIL: objc.dg/pch/interface-1.m -g (test for excess errors)
Excess errors:
/
error: interface-1.h: No such file or
error: one or more PCH files were found, but they were invalid
/
error: use -Winvalid-pch for more
warning: cannot find interface declaration for 'TestClass'

Comment #1 from geoffk at gcc dot gnu dot org 2007-03-02 18:59
This is because gccspec.c is adding -shared-libgcc when it sees an C
file, but inconsistently; it doesn't handle -x options, it doesn't handle the
-objC flag. Darwin, it's wrong to add -shared-libgcc like this because the
objective-C runtime uses setjmp/longjmp exceptions and some versions of Darwin
don't have a shared libgcc to use.

Comment #2 from geoffk at gcc dot gnu dot org 2007-03-07 00:16
The change to gccspec.c was made by Franz Sirl on 2001-06-16, revision 43421.
The mail on gcc-patches is at
<>. There's further
discussion at <>. I
think it's relying on the property that the GNU runtime is (always?) linked
with the dynamic libgcc.

Comment #3 from pinskia at gcc dot gnu dot org 2007-03-07 00:26
I should mention that with the GNU runtime, we want the shared libgcc for
exceptions so any patch that breaks the GNU runtime linking with the shared
libgcc should be rejected.

Comment #4 from geoffk at gcc dot gnu dot org 2007-03-08 19:56
Subject: Bug 31013

Author: geoffk
Date: Thu Mar 8 19:56:37 2007
New Revision: 122709

URL:
Log:
PR 31013
* gccspec.c (lang_specific_driver): Do nothing when NEXTBJC_RUNTIME
is declared.
* config/darwin.h (REAL_LIBGCC_SPEC): When -fgnu-runtime is
passed, use shared libgcc.

Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/darwin.h
trunk/gcc/gccspec.c

Comment #5 from geoffk at gcc dot gnu dot org 2007-03-08 20:31
This should be fixed now.

Comment #6 from geoffk at gcc dot gnu dot org 2007-03-10 00:00
Subject: Bug 31013

Author: geoffk
Date: Sat Mar 10 00:00:09 2007
New Revision: 122774

URL:
Log:
PR 31013
* gccspec.c (lang_specific_driver): Do nothing when NEXTBJC_RUNTIME
is declared.
* config/darwin.h (REAL_LIBGCC_SPEC): When -fgnu-runtime is
passed, use shared libgcc.

Modified: