[Bug debug/12500] New: stabs debug info -- void no longer a predefined / builtin type

["taylor at candd dot org" <gcc-bugzilla at gcc dot gnu dot org>]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12500

           Summary: stabs debug info -- void no longer a predefined /
                    builtin type
           Product: gcc
           Version: 3.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: debug
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: taylor at candd dot org
                CC: gcc-bugs at gcc dot gnu dot org

[Observed in i686-pc-linux-gnu native and i686-pc-linux-gnu x powerpc-elf-eabi;
but problem is really configuration independent.]

Pick your favorite .c file, compile it with -gstabs -S, and examine
the output.  At the top of the file you will find the stabs entries
for the predefined / builtin data types -- int, char, short, long,
et cetera.  In 2.95.3, the list included 'void'; in 3.3.1, void is
absent.  This causes subsequent errors in the debug information for
functions and variables that reference void.

The fix is a one liner -- file gcc/dbxout.c, function dbxout_typedefs,
change the line:

    && COMPLETE_TYPE_P (type)
to:
    && COMPLETE_OR_VOID_TYPE_P (type)

With this patch, it bootstraps just fine.

I'm running the testsuite now for i686-pc-linux-gnu native; so far no
regressions.