* Makefile.in (NM_FOR_TARGET): New.
        (libgcc.mk): Pass SHLIB_MKMAP, SHLIB_MAPFILES.
        (libgcc.a, stmp-multilib): Pass NM_FOR_TARGET.
        * mklibgcc.in: If SHLIB_MKMAP, build libgcc.map.  Depend the
        shared library build on that and EXTRA_MULTILIB_PARTS.
        * mkmap-flat.awk: New file.
        * mkmap-symver.awk: New file.
        * libgcc-std.ver: New file.
        * config/libgcc-glibc.ver: New file.
        * config/ia64/libgcc-ia64.ver: New file.
        * config/t-linux (SHLIB_MKMAP, SHLIB_MAPFILES): New.
        (SHLIB_LINK): Add --version-script.
        * config/ia64/t-ia64 (SHLIB_MAPFILES): Add libgcc-ia64.ver.
        * config/mips/t-iris6 (SHLIB_MKMAP, SHLIB_MAPFILES): New.
        * config/sparc/t-sol2 (SHLIB_MKMAP, SHLIB_MAPFILES): New.
        (SHLIB_LINK): Add -M.

From-SVN: r36746