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small Darwin fix


powerpc-darwin libgcc_s.dylib is supposed to export the _xlq* symbols
defined by rs6000/darwin-ldouble.c.  My patch yesterday broke this
(neither libgcc-std.ver nor libgcc-darwin.ver mentioned those symbols,
which was harmless as long as the generated version map wasn't being
used for anything).  The cure is to make use of the existing
rs6000/libgcc-ppc64.ver.  

Bootstrapped and tested on powerpc-darwin.  Thanks to Andreas Tobler
for finding the problem and assisting with testing.

zw

        * config/rs6000/t-darwin: Augment SHLIB_MAPFILES with
        config/rs6000/libgcc-ppc64.ver.

===================================================================
Index: config/rs6000/t-darwin
--- config/rs6000/t-darwin	14 Oct 2004 22:30:43 -0000	1.14
+++ config/rs6000/t-darwin	17 Nov 2004 22:12:51 -0000
@@ -11,3 +11,6 @@ LIB2FUNCS_STATIC_EXTRA = \
 # even though they use AltiVec instructions.  -Wa is used because
 # -force_cpusubtype_ALL doesn't work with -dynamiclib.
 TARGET_LIBGCC2_CFLAGS = -Wa,-force_cpusubtype_ALL
+
+# Export the _xlq* symbols from darwin-ldouble.c.
+SHLIB_MAPFILES += $(srcdir)/config/rs6000/libgcc-ppc64.ver


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