darwin libgomp build oddity

[Jack Howarth]

  Does anyone understand why we get the following when configure is run
in the libgomp directory on darwin?

configure:17711: checking for shared libgcc
configure:17731: /sw/src/fink.build/gcc43-4.2.999-20071214/darwin_objdir/./gcc/xgcc -B/sw/src/fink.build/gcc43-4.2.999-20071214/darwin_objdir/./gcc/ -
B/sw/lib/gcc4.3/i686-apple-darwin9/bin/ -B/sw/lib/gcc4.3/i686-apple-darwin9/lib/ -isystem /sw/lib/gcc4.3/i686-apple-darwin9/include -isystem /sw/lib/g
cc4.3/i686-apple-darwin9/sys-include -o conftest  -lgcc_s   conftest.c  >&5
ld: library not found for -lgcc_s
collect2: ld returned 1 exit status
configure:17737: $? = 1
configure: failed program was:
| /* confdefs.h.  */
| 
| #define PACKAGE_NAME "GNU OpenMP Runtime Library"
| #define PACKAGE_TARNAME "libgomp"
| #define PACKAGE_VERSION "1.0"
| #define PACKAGE_STRING "GNU OpenMP Runtime Library 1.0"
| #define PACKAGE_BUGREPORT ""
| #define PACKAGE "libgomp"
| #define VERSION "1.0"
| #define STDC_HEADERS 1
| #define HAVE_SYS_TYPES_H 1
| #define HAVE_SYS_STAT_H 1
| #define HAVE_STDLIB_H 1
| #define HAVE_STRING_H 1
| #define HAVE_MEMORY_H 1
| #define HAVE_STRINGS_H 1
| #define HAVE_INTTYPES_H 1
| #define HAVE_STDINT_H 1
| #define HAVE_UNISTD_H 1
| #define HAVE_DLFCN_H 1
| #define LT_OBJDIR ".libs/"
| #define STDC_HEADERS 1
| #define TIME_WITH_SYS_TIME 1
| #define HAVE_UNISTD_H 1
| #define HAVE_SEMAPHORE_H 1
| #define HAVE_SYS_TIME_H 1
| #define HAVE_GETLOADAVG 1
| #define HAVE_BROKEN_POSIX_SEMAPHORES 1
| #define HAVE_ATTRIBUTE_VISIBILITY 1
| /* end confdefs.h.  */
| 
| int
| main ()
| {
| return 0;
|   ;
|   return 0;
| }
configure:17789: /sw/src/fink.build/gcc43-4.2.999-20071214/darwin_objdir/./gcc/xgcc -B/sw/src/fink.build/gcc43-4.2.999-20071214/darwin_objdir/./gcc/ -
B/sw/lib/gcc4.3/i686-apple-darwin9/bin/ -B/sw/lib/gcc4.3/i686-apple-darwin9/lib/ -isystem /sw/lib/gcc4.3/i686-apple-darwin9/include -isystem /sw/lib/g
cc4.3/i686-apple-darwin9/sys-include -o conftest  -lgcc_s.10.5   conftest.c  >&5
configure:17795: $? = 0
configure:17799: test -z 
                         || test ! -s conftest.err
configure:17802: $? = 0
configure:17805: test -s conftest
configure:17808: $? = 0
configure:17821: result: yes
configure:17862: WARNING: === You have requested some kind of symbol versioning, but
configure:17864: WARNING: === either you are not using a supported linker, or you are
configure:17866: WARNING: === not building a shared libgcc_s (which is required).
configure:17868: WARNING: === Symbol versioning will be disabled.
configure:17884: versioning on shared library symbols is no

I don't seem to see this warning about symbol versioning in config.log for any
of the other shared libraries built for gcc trunk on darwin.
                 Jack