[Gm2] Still struggling with gm2-4.7.3 on Solaris/sparc

[john o goyo]

The build is currently failing with gm2-2014-04-20. (It fails trying to 
link stage1/gm2/cc1gm2.)

Leaving aside gcc-4.7.3 for a bit, I tried building with Sun C 5.12. 
(After all, the GCC docs do claim that any ANSI-compliant compiler 
works.)  Configure seems to become easily confused with the 32/64-bit 
options.  For the source to be compiled in 64-bit mode consistently 
required environment variables such as CC="cc -m64", CXX="CC -m64", and 
so on.  Even then, many source files were compiled in 32-bit mode. 
(Configure may pay lip-service to other compilers but the builds do not 
seem to work properly without gcc.)  I gave up.

I do not understand why earlier builds succeeded and now fail.  (Mind, 
had one of my developers complained to me about this, I would have 
suggested that something in the environment had changed.  I do not know 
what.  I have a dedicated build account that stays constant.)

It does appear that configure is confused about the 32/64-bit dichotomy. 
 Solaris/sparc code typically appears in both versions (with the 32-bit 
versions in $LIB and the 64-bit versions in $LIB/64, where LIB is the 
appropriate directory).  Specifying sparcv9 should trigger 64-bit 
compilation but sometimes it does not.

So I am starting de nuovo, building gcc-4.7.3 (and required helpers) in 
both configurations, and then moving on to gm2.  I will keep the group 
posted.

john