[Bug target/45258] New: linkage on -lm and -lpthread should be purged from darwin build

[howarth at nitro dot med dot uc dot edu]

Currently libjava is being improperly linked (PR java/41991) due to the
presence of -lm and -lpthreads on the shared library linkages. This causes
libSystem.dylib to be pushed to the front of the linkage and breaks the logic
used by libgcc_ext. We should add and set defines for HAVE_LIBSYSTEM_PTHREADS
and HAVE_LIBSYSTEM_LIBMATH to configure and use these for conditionals in the
Makefile.am's where appropriate to avoid passing -lm and -lpthread on darwin.


-- 
           Summary: linkage on -lm and -lpthread should be purged from
                    darwin build
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: howarth at nitro dot med dot uc dot edu
 GCC build triplet: *-apple-darwin*
  GCC host triplet: *-apple-darwin*
GCC target triplet: *-apple-darwin*


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45258