[Bug other/54423] New: building trunk on Darwin 12.1 fails in building libraries

[nenad at intrepid dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54423

             Bug #: 54423
           Summary: building trunk on Darwin 12.1 fails in building
                    libraries
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: critical
          Priority: P3
         Component: other
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: nenad@intrepid.com


Building the trunk on Mac OS X 10.8.1 (Darwin 12.1.0) fails.
Configuring libraries fails with the following error (e.g. libatomic):

configure:3477: checking for C compiler default output file name
configure:3499: /eng/upc/dev/nenad/gcc-trunk/bld/./gcc/xgcc
-B/eng/upc/dev/nenad/gcc-trunk/bld/./gcc/
-B/usr/local/x86_64-apple-darwin12.1.0/bin/
-B/usr/local/x86_64-apple-darwin12.1.0/lib/ -isystem
/usr/local/x86_64-apple-darwin12.1.0/include -isystem
/usr/local/x86_64-apple-darwin12.1.0/sys-include    -g -O2   conftest.c >&5
Undefined symbols for architecture x86_64:
  "start", referenced from:
     -u command line option
ld: symbol(s) not found for architecture x86_64
collect2: error: ld returned 1 exit status

The above uses the following link lines (produces with -v switch):

/eng/upc/dev/nenad/gcc-trunk/bld/./gcc/collect2 -dynamic -arch x86_64
-macosx_version_min 10.8.1 -weak_reference_mismatches non-weak -o a.out
-L/eng/upc/dev/nenad/gcc-trunk/bld/./gcc
/var/folders/z7/83zx0wdj4cx644rg7p7kgwb80000gn/T//cc6kpstu.o -no_compact_unwind
-lSystem -lgcc_ext.10.5 -lgcc -lSystem -v -idsym -dsym
collect2 version 4.8.0 20120828 (experimental)
/eng/upc/dev/nenad/gcc-trunk/bld/./gcc/collect-ld -dynamic -arch x86_64
-macosx_version_min 10.8.1 -weak_reference_mismatches non-weak -o a.out
-L/eng/upc/dev/nenad/gcc-trunk/bld/./gcc
/var/folders/z7/83zx0wdj4cx644rg7p7kgwb80000gn/T//cc6kpstu.o -no_compact_unwind
-lSystem -lgcc_ext.10.5 -lgcc -lSystem -v

This test links if I add "-lcrt1.o" on the command line. I have the latest
Xcode loaded and my Mac is up to date.