gcc compatibility

[Sven Eschenberg]

Hi there,

As you can see your program is linked against the NTPL version of glibc 
on System A (running glibc 2.3) ... LinuxThreads support was dropped in 
2.4 AFAIK. Obviously the version compiled on System B is linked against 
version 2.5 of glibc.

I can only assume that with some sort of ABI change for NPTL along with 
the newer binutils something in the resulting executeable changed in a 
way, that System A cannot properly link dynamically against the old NTPL 
interface.

You could check the outputs of your two glibc version to check for 
differences ... (Just run them), the output should somewhat look like this:

GNU C Library stable release version 2.6.1, by Roland McGrath et al.
Copyright (C) 2007 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Compiled by GNU CC version 4.1.2 (Gentoo 4.1.2).
Compiled on a Linux >>2.6.16.16<< system on 2007-12-08.
Available extensions:
        C stubs add-on version 2.1.2
        crypt add-on version 2.1 by Michael Glad and others
        Gentoo patchset 1.1
        GNU Libidn by Simon Josefsson
        Native POSIX Threads Library by Ulrich Drepper et al
        Support for some architectures added on, not maintained in glibc 
core.
        BIND-8.2.3-T5B
For bug reporting instructions, please see:
<http://www.gnu.org/software/libc/bugs.html>.

You could aswell inspect the two executeables (with objdump etc.) to see 
if there is a major difference in the sections or something ... and 
since you program is so short you could check the asm output before 
final linking for differences.

But I guess you might have to ask the glibc folks for the internals and 
an exact answer.

Regards

-Sven

cdinesh schrieb:
> Properly
> Strike
> Protest
>
>  Hi 
>
>     I have two  Linux systems  have different gcc  version 
>           system A  -> gcc  (3.4.4)
>           system B  -> gcc  (4.1.2)
>
>
>   I would like to build test program that can be run on both systems 
>   ---------------------------
>   #include <stdio.h>
>   main(){
>    printf("hello world \n");
>   }
>   ---------------------------
>    gcc test.c -o test
>
>   ldd on system A 
>          linux-gate.so.1 =>  (0x00d42000)
>         libc.so.6 => /lib/tls/libc.so.6 (0x00b0c000)
>         /lib/ld-linux.so.2 (0x00af2000)
>
>   ldd on system B 
>          linux-gate.so.1 =>  (0x00814000)
>         libc.so.6 => /lib/libc.so.6 (0x0054a000)
>         /lib/ld-linux.so.2 (0x0052d000)
>
>    Test case 1 
>      Build test.c on system A and run on both systems A and B. 
>          ïƒ   on sytem A     ok
>          ïƒ    on system B    ok.
>
>    Test case 2 
>      Build test.c on system B and run on both systems A and B. 
>             ïƒ  on system B   ok
>             ïƒ  on system A   error
>            error log 
>              # ./test
>               Floating point exception
>
>              # ldd 
>              /usr/bin/ldd: line 124:  3911 Floating pointexception
> LD_TRACE_LOADED_OBJECTS=1 LD_WARN= 
>              LD_BIND_NOW= LD_LIBRARY_VERSION
>  =$verify_out LD_VERBOSE= "$@"
>  
>     for other information 
>
>       System A 
>             kernel  2.6.12
>             gliibc version  2.3.6
>             binutils  2.15.92.0.2
>             selinux disable
>
>       System B 
>             kernel  2.6.18
>             gliibc version  2.5
>             binutils  2.17.50.0.6
>             selinux disable
>
>
> I have a feeling the problem is in the libraries. Please give any advice ?
>
> Thank you 
>
>