Re: [tbox-l] Compiling gcc 3.3.2 on AIX 64 bit platform

[Pythagoras W. <py...@ll...>]

On Wed, Mar 28, 2007 at 02:53:11PM +0530, Rajesh Pethe wrote:
:I'm having an issue with gcc compiler on powerpc-ibm-aix5.2.0.0. I've
:tried installing the RPM package but after successful installation the
:compiler is not working.
:
:Even tried to compile a simple C program 'int main() { return 0; }'
:using gcc -c file.c and it returns -
:
:Assembler:
:/tmp//ccCt0H7E.s: line 10: 1252-191 Only .llong should be used for
:relocatable expressions.

The issue is that the IBM tools (in this case the assembler) pay
attention to the OBJECT_MODE environment variable, while gcc does
not.  I'll bet that you have OBJECT_MODE=64, so /usr/bin/as expects
64-bit assembler instructions, but gcc generated 32-bit ones.  To make
it work, either set OBJECT_MODE=32 or use the -maix64 option to gcc.
That way the tools will consistently use the correct mode.

For example:
  env OBJECT_MODE=32 gcc -c file.c
  gcc -maix64 -c file.c

To solve this for our users, we rename /opt/freeware/bin/gcc to
/opt/freeware/bin/gcc.orig and put a wrapper script at
/opt/freeware/bin/gcc that attempts to keep the tool chain
consistent.  The same thing is done for g++.

---Cut Here---
#!/bin/sh
# Wrap gcc and g++ to support the OBJECT_MODE environment variable.

# Determine which compiler was requested
case "$0" in
    *gcc*) compiler=gcc ;;
    *g++*) compiler=g++ ;;
    *    ) echo "failed to determine compiler (gcc or g++) from '$0'" >&2
           exit 1
           ;;
esac

compiler=/opt/freeware/bin/$compiler.orig

# Scan for -maix32 or -maix64, which overrides OBJECT_MODE
for arg in "$@"; do
    case "$arg" in
        -maix32|-maix64) unset OBJECT_MODE; break ;;
    esac
done

# Tell compiler to use requested object mode
if [ "$OBJECT_MODE" = 64 ]; then
    set -- -maix64 "$@"
fi

exec $compiler "$@"
---Cut Here---

-- 
Pythagoras Watson, LLNL ASC Systems Administrator