[Bug boehm-gc/49381] New: Unresolved symbols in libgcjgc.a when linking gctest

["gcc-tgc at jupiterrise dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49381

           Summary: Unresolved symbols in libgcjgc.a when linking gctest
           Product: gcc
           Version: 4.5.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: boehm-gc
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: gcc-tgc@jupiterrise.com
              Host: i386-pc-solaris2.9


On sparc-sun-solaris2.7 and i386-pc-solaris2.9 I'm seeing this when running the
testsuite.

libtool: link: /export/home/pkgsrc/ccj_native/./gcc/xgcc
-B/export/home/pkgsrc/ccj_native/./gcc/ -B/export/home/pkgsrc/
gcc45/i386-pc-solaris2.9/bin/
-B/export/home/pkgsrc/gcc45/i386-pc-solaris2.9/lib/ -isystem
/export/home/pkgsrc/gcc45/i3
86-pc-solaris2.9/include -isystem
/export/home/pkgsrc/gcc45/i386-pc-solaris2.9/sys-include -fexceptions -Iinclude
-I./.
/targ-include -I.//libc/include -O2 -g -o gctest -shared-libgcc tests/test.o 
./.libs/libgcjgc.a -lpthread -ldl
Undefined                       first referenced
 symbol                             in file
nanosleep                           ./.libs/libgcjgc.a(pthread_support.o)
sched_yield                         ./.libs/libgcjgc.a(pthread_support.o)
sem_destroy                         ./.libs/libgcjgc.a(pthread_support.o)
sem_getvalue                        ./.libs/libgcjgc.a(pthread_stop_world.o)
sem_init                            ./.libs/libgcjgc.a(pthread_support.o)
sem_post                            ./.libs/libgcjgc.a(pthread_support.o)
sem_wait                            ./.libs/libgcjgc.a(pthread_support.o)
ld: fatal: Symbol referencing errors. No output written to gctest
collect2: ld returned 1 exit status

The reason seems to be that
http://gcc.gnu.org/ml/gcc-patches/2011-01/msg02288.html is missing on 4.5
branch.
Applying that fixes the issue for me.