#!/bin/sh
# xmkmf32 --- run xmkmf on bi-arch systems for 32-bit configuration
# Author: Noah Friedman <friedman@splode.com>
# Created: 2006-10-03
# Public domain

# $Id: xmkmf32,v 1.2 2006/10/26 00:31:37 friedman Exp $

# Commentary:

# On bi-arch linux-based systems, the default is to build 64-bit binaries.
# This is hardwired into both gcc and imake.  This script intercepts
# imake's call to the preprocessor, removes any flags which might
# explicitly enable 64-bit macros, then runs the real preprocessor with -m32.

# This script uses syntax which may require bash 2.0 or later.

# Code:

declare -a elide_args
elide_args=("-D__amd64__" "-m64")

elidep()
{
  local x
  for x in "${elide_args[@]}"; do
    [[ $1 = $x ]] && return 0
  done
  return 1
}

cpp32()
{
  local -i len=$#
  local -i i=-1
  local -a args
  args=("$@")

  while (( ++i < len )); do
    elidep "${args[i]}" && unset args[i]
  done

  set fnord $SETARCH ${CC-gcc} -m32 -E "${args[@]}"
  shift

  # echo the command we're about to execute to the same stdout that xmkmf
  # writes; imake inherits this stdout.
  echo ${1+"$@"} > /proc/$PPID/fd/1
  exec ${1+"$@"}
}

main()
{
  case ${XMKMF32SUB-no} in
    no ) : ;;
    *  ) cpp32 ${1+"$@"} ;;
  esac

  XMKMF32SUB=yes
  IMAKECPP=$0
  export XMKMF32SUB IMAKECPP
  exec ${XMKMF_REAL-xmkmf} ${1+"$@"}
}

main "$@"

# eof