testing consistency

[Dave Love]

>>>>> "Joe" == Joe Buck <jbuck@synopsys.com> writes:

 Joe> Another problem is that, the way the configure is done, it is
 Joe> easy to wind up with bad data in the config.cache files for the
 Joe> f77 runtime.  The reason is that you wind up with something like
 Joe> the following in gcc/f/runtime/config.cache (I've replaced the
 Joe> directory containing the egcs distribution with <SRCDIR>).

 Joe> ac_cv_prog_CC=${ac_cv_prog_CC='<SRCDIR>/gcc/xgcc -B<SRCDIR>/gcc/'}

The cache file has been taken out of the `clean' target for some
reason.  It was there advisedly, normal GNU standards notwithstanding.
[This is one complication with using automake for the runtime.]

 Joe> It would be more robust if we could avoid placing definitions of
 Joe> ac_cv_prog_CC like this in the cache.

The idea was always to be sure the correct compiler was being used by
configure.  I don't remember the cache file being a particular problem
during g77 development with the released GCCs (especially wrt bug
reports), though I've personally fallen over various things like this
occasionally :-/.