I'm using egcs-980321, binutils-2.9.0.3, glibc-2.0.92 (dated 980412) on i586

{,LIB}{C,CXX,F77}FLAGS = -O2 -fomit-frame-pointer -march=pentium
--enable-{shared,threads,haifa} i386-redhat-linux

The following have to be fixed to get gcc/haifa-sched.c to compile:

--- haifa-sched.c.dist	Sun Apr 19 13:12:00 1998
+++ haifa-sched.c	Sun Apr 19 13:53:11 1998
@@ -761,7 +761,7 @@
 static void find_pre_sched_live PROTO ((int));
 static void find_post_sched_live PROTO ((int));
 static void update_reg_usage PROTO ((void));
-static int queue_to_ready ((rtx [], int))
+static int queue_to_ready PROTO ((rtx [], int));
 
 void debug_ready_list PROTO ((rtx[], int));
 static void init_target_units PROTO (());

After fixing this, the resulting compiler crashes when trying to find out
if underscores are needed. Sure enough, the resulting cpp command line is
broken: 

./xgcc -v -B./ -S tmp-dum.c
Reading specs from ./specs
gcc version egcs-2.91.24 19980418 (gcc2 ss-980401 experimental)
 ./cpp -lang-c -v -isystem ./include -undef -D__GNUC__=2
 -D__GNUC_MINOR__=91 -D__ELF__ -Dunix -Dlinux -D__ELF__ -D__unix__
 -D__linux__ -D__unix -D__linux -Asystem(posix) -Di386 -Asystem(unix)
 -Acpu(i386) -Amachine(i386) __ -D__i386__ -Asystem(unix) -Acpu(i386)
 -Amachine(i386) __ tmp-dum.c /tmp/cca06809.i
GNU CPP version egcs-2.91.24 19980418 (gcc2 ss-980401 experimental) (i386
Linux/ELF)
cpp: Usage: ./cpp [switches] input output

I'm continuing the bootstrap after copying the specs file from 980321 over
(Yes, I know this is almost guaranteed to be wrong, but I just couldn't
find out where this stupid "__" comes from). BTW, the specs file made during
the building of a stage is equally broken, so I can't finish a normal
boostrap, and any checks will be suspect too :-(

For the time being, I'll consider egcs-1998-04-18 highly toxic.
-- 
Horst von Brand                             vonbrand@sleipnir.valparaiso.cl
Casilla 9G, Viña del Mar, Chile                               +56 32 672616