egcs-19981220 build on i586-linux-gnu crash

[Horst von Brand]

This is linux-2.1.131ac13, binutils-2.9.1.0.19a, glibc-2.0.108. Bootstrap
(with egcs-19981213) goes fine, but crashes during the build of libio. 

The following tiny source crashes the stage3 egcs-19981220 (extracted from
preprocessed libio/builtinbuf.cc). egcs-19981213 handles it fine:

extern void *f(unsigned int k) throw();

/usr/src/build/build-egcs-19981220/gcc/xgcc \
  -B/usr/src/build/build-egcs-19981220/gcc/ -c tst.cc
tst.cc:1: Internal compiler error.
tst.cc:1: Please submit a full bug report to `egcs-bugs@cygnus.com'.
tst.cc:1: See <URL: http://egcs.cygnus.com/faq.html#bugreport > for details.

config.status is:

#!/bin/sh
# This file was generated automatically by configure.  Do not edit.
# This directory was configured as follows:
../egcs-19981220/configure --with-gcc-version-trigger=/usr/src/build/egcs-19981220/gcc/version.c --host=i586-redhat-linux --enable-shared --enable-threads --enable-haifa --prefix=/usr --norecursion 
# using "mh-frag" and "mt-frag"

CFLAGS='-D__USE_GNU -D__NO_MATH_INLINES -O2 -fomit-frame-pointer
-march=pentium' \
LIBCFLAGS='-D__USE_GNU -D__NO_MATH_INLINES -O2 -fomit-frame-pointer
-march=pentium' \
CXXFLAGS='-D__USE_GNU -D__NO_MATH_INLINES -O2 -fomit-frame-pointer
-march=pentium' \
LIBCXXFLAGS='-D__USE_GNU -D__NO_MATH_INLINES -O2 -fomit-frame-pointer
-march=pentium' \
F77FLAGS='-D__USE_GNU -D__NO_MATH_INLINES -O2 -fomit-frame-pointer
-march=pentium' \
LIBF77FLAGS='-D__USE_GNU -D__NO_MATH_INLINES -O2 -fomit-frame-pointer -march=pentium'
-- 
Horst von Brand                             vonbrand@sleipnir.valparaiso.cl
Casilla 9G, Viña del Mar, Chile                               +56 32 672616