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Re: [Gm2] Missing file in snapshot

From: Gaius Mulley
Subject: Re: [Gm2] Missing file in snapshot
Date: 03 Oct 2008 23:42:19 +0100
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.4

Ed Smith-Rowland <address@hidden> writes:

> Greetings,
> After successfully building the tarball I decided to go crazy and see
> if I could bootstrap from gcc-HEAD.  This is on 64-bit RHEL5.

Hi Ed,

very interesting - thanks for trying and reporting this!

> 1. I copied the gm2 directory into an up to date checkout of gcc.
> 2. I configured:
> ../gcc/configure --prefix=/home/ed/bin-gm2-head --with-gmp=/usr/local
> --with-mpfr=/usr/local --enable-languages=c,c++,gm2
> (A rather recent gmp and mpfr are required - the OS-supplied versions
> are too old.)
> 3. I make
> Pretty soon I run into a problem with gm2-.def with the four tree
> codes copied from C++ for exception handling.  There is a complaint
> about redefinitions.  Something changed in the architecture of gcc.
> 4. As a shot in the dark I just commented the four offending tree codes.
> I don't know why when we build c++ in both trees it works in 4.1.2 but
> not in 4.4.  But whatever.
> The build proceeds very much further until is gets to gm2spec.c.  This
> is where command line arguments are parsed.
> The errors involve casts between "char ***" and "const char * const
> **" and similar.
> I shamelessly copied a mechanism they use in gfortran where they have
> two sets of static variables for input and output argc and argv and
> use cast macros to get around.

> The build is proceeding a bunch further until a build of xgm2 where
> there is am undefined symbol "prune_options".
> This is found in gcc/opts-common.o
> Adding that object file leads to more symbols cl_options and
> cl_options_count not defined.  I found *those* under the gm2 build
> directory in options.c.  When I add options.o I get tons of undefined
> symbols.
> I don't know how to resolve these symbols.  Maybe there is a lib with
> all this stuff in it?
> If anyone has tried this do you have any ideas?
> Is anyone interested in what (little) progress I've made?  I could
> send the changed files.

yes please - please post the diffs!  Did gccgm2.o compile?  If this
compiled cleanly then this might signify that completing the port to
gcc-4.4 probably not too far away..


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