Help needed with GCC 2.95.3 on Redhat 8 -- segfault

Help needed with GCC 2.95.3 on Redhat 8 -- segfault

[Philip George]

I have a really irritating problem with GCC 2.95.3 on Redhat 8.

I have compiled and installed binutils 2.12 and GCC 2.95.3 on a Redhat 
6.2 (default compiler egcs2.91.66) and a Redhat 8 (default compiler
gcc3.2) box.

I would like to run this simple program:

// phil.cc
#include <stdio.h>
int main(void) {
    FILE *fr=freopen("blib","r",stdin);
    printf("Success\n");
    return 1;
}

On Redhat 6.2, this happens:
% g++ phil.cc -o phil
% phil
Success
      (good!)

On Redhat 8, this happens:
% g++ phil.cc -o phil
% phil
Segmentation fault

Why does it segfault with the GCC I've built on RH8, but work fine with
RH6.2?

Ldd reveals this...

% ldd phil
	libstdc++-libc6.3-2.so.3 =>
/usr/installed/gcc2.95.3/lib/libstdc++-libc6.3-2.so.3 (0x40013000)
	libm.so.6 => /lib/i686/libm.so.6 (0x40070000)
	libc.so.6 => /lib/i686/libc.so.6 (0x42000000)
	/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)

(
 On the RH 6.2 box, on which it runs successfully, I get...
	libstdc++-libc6.1-2.so.3 =>
/installed/gcc-2.95.3/lib/libstdc++-libc6.1-2.so.3 (0x40015000)
	libm.so.6 => /lib/libm.so.6 (0x40068000)
	libc.so.6 => /lib/libc.so.6 (0x40085000)
	/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)
)

If I instead try to build it as a C program, ie.
% gcc phil.cc -o phil
...  then it works fine.

What on earth could be going wrong?  I'd thought that perhaps the
libraries might be out of sync but I can't think how or why that would be
the case.

On the Redhat 8 box we also have a GCC 3.2 compiler installed.  But I've
made sure that the GCC2.95.3 installation directory appears at the
beginning of my $PATH and $LD_LIBRARY_PATH to make sure it's picking up
the correct one.

(FYI, ldd on the working 'gcc'-compiled version gives...
	libc.so.6 => /lib/i686/libc.so.6 (0x42000000)
	/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)
)

Can anyone help?  (please!)

phil

-- 
Phil George, Anvil Software Ltd.
email: philg@anvil.com
phone: 020 7749 7922

GCC 2.95.3 on Redhat 8 -- more problems

[Philip George]

I recently built & installed GCC 2.95.3 on a Redhat 8 machine
(bootstrapping from GCC 3.2), but I'm having trouble getting much of my
C++ code to work properly.  It builds but just doesn't get very far when
running it up.

We have piles of code that was built with 2.95.3 and we really
don't want to get it all to build with GCC 3.2 unless we absolutely have 
to.

I've read that people advise against installing GCC 2.95.3 on RH7.x for
various reasons.   Does anyone know if the same applies to RH8.0?  If
not, can anyone suggest how I might be able to get it to work
reliably?  (Do I need to install different glibc and/or libstdc++?)

Cheers
Phil