On 18 Aug 2005, Jeremy Dreese prattled cheerily:
> We're using RedHat Enterprise Linux (RHEL) on both 64-bit servers and
> 32-bit desktop systems. Code that is compiled on the servers must be
> able to run on the desktop systems as well. By default RHEL 3 for AMD64
> compiles in 64-bit mode so obviously the generated executables won't run
> on our desktop systems. I know that you can compile in 32-bit mode with
> the -m32 option, but is there a way to have gcc/g++ compile in 32-bit by
> default (without specifying the option every time)? Even creating a
> shell alias (e.g. alias gcc="gcc -m32") doesn't take care of the problem
> as this alias gets ignored when using gcc in a Makefile. Is there a way
> to do what I'm asking?
It *is* possible to change GCC's specs files to do what you're asking,
but a wrapper shell script named `gcc' (and another named `g++`, et al)
that invokes the real GCC would be better.
I use this script, in /usr/bin, linked to gcc, g++, c++, and so on, on a
sparc biarch system:
#!/usr/bin/zsh
#
# Default to -m32 unless in sparc64 mode or -m64 is specified.
#
if echo "$@" | grep -E -- '(^| )-m(32|64)( |$)' >/dev/null 2>&1; then
exec /usr/bin/wrapped/$(basename $0) "$@"
elif uname -m | grep -v 64 >/dev/null 2>&1; then
exec /usr/bin/wrapped/$(basename $0) -m32 "$@"
else
exec /usr/bin/wrapped/$(basename $0) -m64 "$@"
fi
--
`... published last year in a limited edition... In one of the
great tragedies of publishing, it was not a limited enough edition
and so I have read it.' --- James Nicoll
