[Gm2] Mac OS X Intel Update

[Michael Lambert]

Things are looking better on Mac OS X.  With some tweaks I get the  
following from 'make check-gm2':

# of expected passes            6084
# of unexpected failures        54
# of unresolved testcases       18

One tweak is the following patch (ld on OS X complains about the dwarf  
format):

--------------------
--- Make-lang.in.sav    2008-10-01 16:46:23.000000000 -0400
+++ Make-lang.in        2008-10-08 08:45:42.000000000 -0400
@@ -56,6 +56,13 @@
 XGM2BUILD1 = /home/gaius/GM2/gm2-harness/build/gcc/stage1/gm2 -g - 
gdwarf-2
 XGM2_1 = ./xgm2
 XGM2BUILD1 = ./stage1/gm2  -g -gdwarf-2
+ifeq ($(OSTYPE),darwin)
+  ifeq ($(VENDOR),apple)
+    ifeq ($(MACHTYPE),i386)
+       XGM2BUILD1 = ./stage1/gm2 -g
+    endif
+  endif
+endif

 # Define the name of target independent tools to be installed in $ 
(bindir)
 # Names are subject to changes
--------------------

Another is to replace '--strip-underscores' by '--strip-underscore' in  
gcc-4.1.2/libstdc++-v3/scripts/make_exports.pl.  The manpage refers to  
the plural but c++filt only takes the singular.  I haven't created a  
patch because I'm hoping it might be fixed with an upgrade to Xcode  
(I'm running 3.0).

Finally, I needed to do a 'make install' before running the tests.   
The C++ library (-lstdc++) wasn't being found by the linker.  There is  
undoubtedly a proper fix which can be applied in the Makefile.

Michael