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* 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
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