Re: Patch to move "#define USG" from xm-*.h to config.gcc's xm_defines

["Zack Weinberg" <zackw at Stanford dot EDU>]

On Wed, Mar 07, 2001 at 07:22:30PM -0500, Kaveh R. Ghazi wrote:
>  > From: "Zack Weinberg" <zackw@Stanford.EDU>
>  > 
>  > Are you going to do anything about all the files that just include
>  > other files?  We want to turn those into direct references from
>  > config.gcc.
>  > zw
> 
> Sure.  I actually already took a look but it seemed like it would be
> better to wait until after your config.h patch went in.
> 
> I'm going to hit POSIX next.
> After that I'm going to put MAXPATHLEN into system.h.
> Then I'll wait for your patch to go in and do include files.
> 
> Besides those and:
> HOST_WORDS_BIG_ENDIAN

very next on my list

> ONLY_INT_FIELDS
> HOST_FLOAT_FORMAT

for autoconf to handle these will require great cleverness; not
impossible, though.  ONLY_INT_FIELDS - we have to think of tests for
all the possible ways compilers could mess up enum bitfields.
HOST_FLOAT_FORMAT - I imagine a hack like rth's for
HOST_WORDS_BIG_ENDIAN would work, but we'd have to find floating point
numbers that correspond to recognizable strings that could be grepped
for.  That's not easy.

> Deleting USG/POSIX from config.gcc

For this to happen, changes have to be made in the debug output code
as well as the rest of the compiler.

> Bypassing platforms which really need hacks: vms/beos/dos/interix/etc

I'm pretty sure beos doesn't need most of what it's got now ... it can
run configure just fine.

> What else is on the "list"?

Sorting out things that belong in target headers but are in host.
Interix, VMS, DOS, etc. have a bunch of this.

The x-host files.  All kinds of random crap hiding in there.  Most of
it totally obsolete, I think.

Clean up pathname handling to the point where all we have to do is
define HAVE_DOS_BASED_FILE_SYSTEM to get the DOS path handling, and
similar for VMS.  I think everyone else uses the simple Unix filename
scheme.

Weed out dead configurations: vax-vms and A/UX come to mind.

See how much of the t-target files can go away.  Two things in
particular: we should be running fixproto everywhere, just like
fixincludes; we should stop providing our own @#$! assert.h except on
platforms which really don't have it.

zw