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Linux/UNIX/POSIX Shell Script  |  2005-10-13  |  3KB  |  108 lines
  1. #!/bin/bash
  2. # Copyright 1999-2005 Gentoo Foundation
  3. # Distributed under the terms of the GNU General Public License v2
  4. # $Header: /var/cvsroot/gentoo-x86/sys-devel/autoconf-wrapper/files/ac-wrapper-3.sh,v 1.2 2005/06/30 12:58:52 azarah Exp $
  5.  
  6. # Based on the ac-wrapper.pl script provided by MandrakeSoft
  7. # Rewritten in bash by Gregorio Guidi
  8. #
  9. # Executes the correct autoconf version.
  10. #
  11. # - defaults to latest version (2.5x)
  12. # - runs autoconf 2.13 only if:
  13. #   - envvar WANT_AUTOCONF is set to `2.1'
  14. #     -or-
  15. #   - `configure' is already present and was generated by autoconf 2.13
  16.  
  17. if [[ ${0##*/} == "ac-wrapper.sh" ]] ; then
  18.     echo "Don't call this script directly" >&2
  19.     exit 1
  20. fi
  21.  
  22. if [[ ${WANT_AUTOCONF} == "2.1" && ${0##*/} == "autom4te" ]] ; then
  23.     echo "ac-wrapper: Autoconf 2.13 doesn't contain autom4te." >&2
  24.     echo "            Either unset WANT_AUTOCONF or don't execute anything" >&2
  25.     echo "            that would use autom4te." >&2
  26.     exit 1
  27. fi
  28.  
  29. binary_new="${0}-2.59"
  30. binary_old="${0}-2.13"
  31. binary=${binary_new}
  32.  
  33. #
  34. # autodetect routine
  35. #
  36. if [[ ${WANT_AUTOCONF} != "2.5" ]] ; then 
  37.     if [[ ${WANT_AUTOCONF} == "2.1" ]] ; then
  38.         if [[ ! -f "configure.ac" ]] ; then
  39.             binary=${binary_old}
  40.         else
  41.             echo "ac-wrapper: Since configure.ac is present, aclocal always use" >&2
  42.             echo "            autoconf 2.59, which conflicts with your choice and" >&2
  43.             echo "            causes error. You have two options:" >&2
  44.             echo "            1. Try execute command again after removing configure.ac" >&2
  45.             echo "            2. Don't set WANT_AUTOCONF" >&2
  46.             exit 1
  47.         fi
  48.     else
  49.         # Automake-1.7 and better requie autoconf-2.5x
  50.         case "${WANT_AUTOMAKE}" in
  51.         1.[7-9]) ;;
  52.         *)
  53.             acfiles=$(ls ac{local,include}.m4 configure.{in,ac} 2>/dev/null)
  54.             if [[ -n ${acfiles} ]] ; then
  55.                 confversion=$(gawk \
  56.                 '{
  57.                     if (match($0, "AC_PREREQ\\(\\[?([0-9]\\.[0-9])", res))
  58.                         VERSIONS[COUNT++] = res[1]
  59.                 }
  60.                 END {
  61.                     asort(VERSIONS)
  62.                     print VERSIONS[COUNT]
  63.                 }' ${acfiles})
  64.             fi
  65.             if [[ -z ${confversion} && -r "configure" ]] ; then
  66.                 confversion=$(gawk \
  67.                 '{
  68.                     if (match($0,
  69.                               "^# Generated (by (GNU )?Autoconf|automatically using autoconf version) ([0-9].[0-9])",
  70.                               res))
  71.                         { print res[3]; exit }
  72.                 }' configure)
  73.             fi
  74.             if [[ ${confversion} == "2.1" && ! -f "configure.ac" ]] ; then
  75.                 binary="${binary_old}"
  76.             fi
  77.         esac
  78.     fi
  79. fi
  80.  
  81. if [[ -n ${WANT_ACWRAPPER_DEBUG} ]] ; then
  82.     if [[ -n ${WANT_AUTOCONF} ]] ; then
  83.         echo "ac-wrapper: DEBUG: WANT_AUTOCONF is set to ${WANT_AUTOCONF}" >&2
  84.     fi
  85.     echo "ac-wrapper: DEBUG: will execute <${binary}>" >&2
  86. fi
  87.  
  88. #
  89. # for further consistency
  90. #
  91. if [[ ${binary} == "${binary_new}" ]] ; then
  92.     export WANT_AUTOCONF="2.5"
  93. elif [[ ${binary} == "${binary_old}" ]] ; then
  94.     export WANT_AUTOCONF="2.1"
  95. fi
  96.  
  97. if [[ ! -x ${binary} ]] ; then
  98.     # this shouldn't happen
  99.     echo "ac-wrapper: ${binary} is missing or not executable." >&2
  100.     echo "            Please try emerging the correct version of autoconf." >&2
  101.     exit 1
  102. fi
  103.  
  104. exec "${binary}" "$@"
  105.  
  106. echo "ac-wrapper: was unable to exec ${binary} !?" >&2
  107. exit 1
  108.