[nflug] Building 32-bit bins under 64-bit Linux

[Ken Smith]

On Thu, 2007-04-12 at 05:52 -0400, Robert Wolfe wrote:
> Hi all!  I was wondering if it were possible to build 32-bit binaries on 
> an x86_64 version of Linux so that the binaries generated can be run on 
> 32-bit Linux?  And if so, HOW?

Include "-m32" on the command line when running the compiler.
Demonstration set of commands on a machine named nickelback:

nickelback 78 % cat hello.c
#include <stdio.h>

int
main(int argc, char *argv[])
{
        printf("Hello World!\n");
}
nickelback 79 % uname -p
x86_64
nickelback 80 % cc -O hello.c -o hello
nickelback 81 % file hello
hello: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for GNU/Linux 2.4.0, dynamically linked (uses shared libs), not stripped
nickelback 82 % cc -m32 -O hello.c -o hello
nickelback 83 % file hello
hello: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.2.5, dynamically linked (uses shared libs), not stripped
nickelback 84 % 

-- 
                                                Ken Smith
- From there to here, from here to      |       kensmith at cse.buffalo.edu
  there, funny things are everywhere.   |
                      - Theodore Geisel |


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