gcc-32-bit-compile-on-64-bit-rhel

minimal example

============================================================
title : gcc-32-bit-compile-on-64-bit-rhel.txt
author: Neil Rieck (Waterloo, Ontario, Canada)
edit  : 2022-07-04
legend: <ur> (user response)
        <sr> (system response)
============================================================
(can we run both 32 + 64 bit apps on this platform?)

<ur> lscpu
<sr> Architecture:          x86_64
     CPU op-mode(s):        32-bit, 64-bit          (YES)
     Byte Order:            Little Endian
     ...snip...
     $
------------------------------------------------------------
(64-bit native build)

<ur> gcc      hello_linux_world.c -o hello_linux_world64
<sr> $
------------------------------------------------------------
(32-bit build which fails)

<ur> gcc -m32 hello_linux_world.c -o hello_linux_world32
     In file included from /usr/include/features.h:399:0,
                 from /usr/include/stdio.h:27,
                 from hello_linux_world.c:1:
     /usr/include/gnu/stubs.h:7:27: fatal error: gnu/stubs-32.h: No such file or directory
     # include <gnu/stubs-32.h>
                               ^
     compilation terminated.
------------------------------------------------------------
(install 32-bit development libs)

<ur> sudo yum install	glibc-devel.i686     \
			libgcc.i686	     \
			libstdc++-devel.i686 \
			ncurses-devel.i686
<sr> ...verbiage...
     $
------------------------------------------------------------
(32-bit build which now works)

<ur> gcc -m32 hello_linux_world.c -o hello_linux_world32
<sr> $
------------------------------------------------------------
(testing)

<sr> $
<ur> gcc      hello_linux_world.c -o hello_linux_world64 # native
<sr> $
<ur> gcc -m32 hello_linux_world.c -o hello_linux_world32 # optional
<sr> $
<ur> ls -la hello*
<sr> -rwxr-xr-x. 1 neil admgrp 7264 Aug  6 10:32 hello_linux_world32
     -rwxr-xr-x. 1 neil admgrp 8424 Aug  6 10:32 hello_linux_world64
     -rw-r--r--. 1 neil admgrp 1258 Aug  6 10:32 hello_linux_world.c
     $
<ur> ./hello_linux_world32 one two
<sr> Hello World from program: ./hello_linux_world32
     cli argc 3
     cli arg  0 ./hello_linux_world32
     cli arg  1 one
     cli arg  2 two
     adios
     $
<ur> ./hello_linux_world64 three four
<sr> Hello World from program: ./hello_linux_world64
     cli argc 3
     cli arg  0 ./hello_linux_world64
     cli arg  1 three
     cli arg  2 four
     adios
     $

Better Example

# sudo yum grouplist                                 # view choices
# sudo yum -y groupinstall 'Development Tools'       # installs x86_64 support
# sudo yum -y groupinstall 'Compatibility Libraries' # adds full i686 support

Back to Linux Demo Index
Back to Real-world Linux Problems + Solutions
Back to Home
Neil Rieck
Waterloo, Ontario, Canada.