g77 -fPIC: bad assembler?

[Douglas Ridgway]

Platform is Red Hat 5.0 on an intel 486, with egcs-1.0 from contrib.

The problem program is at:

  ftp://gmcl.com/pub/weeks.f

ridgway@taiga:~/weeks> g77 -fPIC -save-temps weeks.f
weeks.s: Assembler messages:
weeks.s:3183: Error: operands given don't match any known 386 instruction
ridgway@taiga:~/weeks> tail +3183 weeks.s | head
        leal .LC9@GOTOFF(%ebx),-344(%ebp)
        pushl -344(%ebp)
        fldl -132(%ebp)
        fdivl -148(%ebp)
        fstpl -304(%ebp)
        leal -304(%ebp),%esi
        movl %esi,-344(%ebp)
        pushl -344(%ebp)
        call pow_dd@PLT
        addl $8,%esp
ridgway@taiga:~/weeks> g77 --version
egcs-2.90.23 980102 (egcs-1.0.1 release)
ridgway@taiga:~/weeks> as --version
GNU assembler 2.8.1
Copyright 1997 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License.  This program has absolutely no warranty.
This assembler was configured for a target of `i686-pc-linux-gnu'.
ridgway@taiga:~/weeks> rpm -qf `which g77`
egcs-g77-1.0.1-1
ridgway@taiga:~/weeks> rpm -qf `which as`
binutils-2.8.1.0.1-1

Any help appreciated.

Doug.

ridgway@phys.ualberta.ca