Re: A Linux/libc 5 patch for egcs 1.1.2

[Jeffrey A Law <law at hurl dot cygnus dot com>]

  In message <199902271926.LAA06582@atrus.synopsys.com>you write:
[ ... ]
  > Note that Red Hat 4.2 has libc 5.3.12 plus many Red Hat patches,
  > not libc 5.4.x.  Is it possible that the bug HJ is referring to
  > only shows up on libc 5.4.x systems?
Yes.  libc 5.3.xx doesn't have IO_putc in libc.a and thus does not trigger
the problem.

libc 5.4.xx does have IO_putc in libc.a:

[law@ralph /usr/lib] nm libc.a | grep IO_put
00000000 T _IO_puts
00000000 T _IO_putc


  > (If so, do we have anyone on egcs who has such a system who can try
  > the test?).
I've got RH4.2 up on my scratch disk and I just installed a libc5.4.xx
distribution, so I can cover testing.


Given the testcase referenced by my earlier message:

#include <iostream.h>
#include <streambuf.h>

istream x;
extern "C" int putc(), fgets();

main () {
  x.get();
  putc();
  fgets(); 
  x.gets(0, 0);
}

I've been able to reproduce the problem:

g++ -static foo.C
/usr/lib/libc.a(putc.o): In function `_IO_putc':
putc.o(.text+0x0): multiple definition of `_IO_putc'
/usr/egcs/lib/libstdc++.a(ioputc.o):/puke/law/egcs-1.1/libio/ioputc.c:28: first defined here
/usr/bin/ld: Warning: size of symbol `_IO_putc' changed from 51 to 50 in putc.o
collect2: ld returned 1 exit status


It's very late.  I'm going to bed now.  I'll try to look at the patch tomorrow.

jeff