1 | #!/bin/bash |
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2 | # Copyright 1999-2005 Gentoo Foundation |
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3 | # Distributed under the terms of the GNU General Public License v2 |
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4 | # $Header: /var/cvsroot/gentoo-x86/sys-devel/autoconf-wrapper/files/ac-wrapper-3.1.sh,v 1.3 2005/07/16 20:42:12 azarah Exp $ |
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5 | |
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6 | # Based on the ac-wrapper.pl script provided by MandrakeSoft |
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7 | # Rewritten in bash by Gregorio Guidi |
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8 | # |
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9 | # Executes the correct autoconf version. |
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10 | # |
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11 | # - defaults to latest version (2.5x) |
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12 | # - runs autoconf 2.13 only if: |
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13 | # - envvar WANT_AUTOCONF is set to `2.1' |
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14 | # -or- |
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15 | # - `ac{local,include}.m4' or `configure.{in,ac}' have AC_PREREQ(2.1) (not higher) |
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16 | # -or- |
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17 | # - `configure' is already present and was generated by autoconf 2.13 |
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18 | |
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19 | if [[ ${0##*/} == "ac-wrapper.sh" ]] ; then |
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20 | echo "Don't call this script directly" >&2 |
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21 | exit 1 |
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22 | fi |
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23 | |
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24 | if [[ ${WANT_AUTOCONF} == "2.1" && ${0##*/} == "autom4te" ]] ; then |
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25 | echo "ac-wrapper: Autoconf 2.13 doesn't contain autom4te." >&2 |
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26 | echo " Either unset WANT_AUTOCONF or don't execute anything" >&2 |
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27 | echo " that would use autom4te." >&2 |
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28 | exit 1 |
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29 | fi |
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30 | |
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31 | binary_new="${0}-2.59" |
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32 | binary_old="${0}-2.13" |
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33 | binary=${binary_new} |
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34 | |
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35 | acprereq_version() { |
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36 | # Add --posix to below awk to make sure it will run on macosx, etc |
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37 | awk \ |
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38 | '($0 !~ /^[[:space:]]*(#|dnl)/) { |
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39 | # The following is replaced by below, as we cannot use match() |
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40 | # with a third argument with non-gawk (posix) versions of awk: |
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41 | # |
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42 | #if (match($0, "AC_PREREQ\\(\\[?([0-9]\\.[0-9])", res)) |
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43 | # VERSIONS[COUNT++] = res[1] |
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44 | # |
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45 | sindex = match($0, /AC_PREREQ\(\[?([0-9]\.[0-9])/) |
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46 | if (sindex > 0) { |
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47 | sindex += length("AC_PREREQ(") |
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48 | if (substr($0, sindex, 1) == "[") |
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49 | sindex++ |
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50 | VERSIONS[COUNT++] = substr($0, sindex, 3) |
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51 | } |
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52 | } |
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53 | |
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54 | END { |
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55 | # The following is replaced by below, as we cannot use asort() |
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56 | # with non-gawk (posix) versions of awk: |
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57 | # |
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58 | #asort(VERSIONS) |
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59 | # |
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60 | VERSION = VERSIONS[0] |
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61 | # We need to get the biggest version and print that |
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62 | for (x = 0; x <= COUNT;x++) |
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63 | if (VERSIONS[x] > VERSION) |
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64 | VERSION=VERSIONS[x] |
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65 | |
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66 | print VERSION |
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67 | }' "$@" |
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68 | } |
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69 | |
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70 | generated_version() { |
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71 | # Add --posix to below awk to make sure it will run on macosx, etc |
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72 | awk \ |
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73 | '{ |
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74 | # The following is replaced by below, as we cannot use match() |
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75 | # with a third argument with non-gawk (posix) versions of awk: |
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76 | # |
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77 | #if (match($0, |
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78 | # "^# Generated (by (GNU )?Autoconf|automatically using autoconf version) ([0-9].[0-9])", |
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79 | # res)) |
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80 | # { print res[3]; exit } |
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81 | # |
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82 | # First try for newer versions of autoconf |
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83 | sindex = match($0, /Generated by GNU Autoconf ([0-9]\.[0-9])/) |
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84 | if (sindex > 0) |
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85 | # Now chop the first part before the version |
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86 | sindex += length("Generated by GNU Autoconf ") |
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87 | # No version, so try older versions of autoconf |
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88 | if (sindex <= 0) { |
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89 | sindex = match($0, /Generated automatically using autoconf version ([0-9]\.[0-9])/) |
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90 | if (sindex > 0) |
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91 | sindex += length("Generated automatically using autoconf version ") |
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92 | } |
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93 | |
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94 | # Ok, we got a version |
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95 | if (sindex > 0) { |
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96 | print substr($0, sindex, 3) |
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97 | exit |
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98 | } |
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99 | }' "$@" |
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100 | } |
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101 | |
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102 | # |
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103 | # autodetect routine |
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104 | # |
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105 | if [[ ${WANT_AUTOCONF} != "2.5" ]] ; then |
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106 | if [[ ${WANT_AUTOCONF} == "2.1" ]] ; then |
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107 | if [[ ! -f "configure.ac" ]] ; then |
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108 | binary=${binary_old} |
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109 | else |
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110 | echo "ac-wrapper: Since configure.ac is present, aclocal always use" >&2 |
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111 | echo " autoconf 2.59, which conflicts with your choice and" >&2 |
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112 | echo " causes error. You have two options:" >&2 |
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113 | echo " 1. Try execute command again after removing configure.ac" >&2 |
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114 | echo " 2. Don't set WANT_AUTOCONF" >&2 |
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115 | exit 1 |
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116 | fi |
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117 | else |
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118 | # Automake-1.7 and better requie autoconf-2.5x |
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119 | case "${WANT_AUTOMAKE}" in |
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120 | 1.[7-9]) ;; |
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121 | *) |
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122 | acfiles=$(ls ac{local,include}.m4 configure.{in,ac} 2>/dev/null) |
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123 | [[ -n ${acfiles} ]] && confversion=$(acprereq_version ${acfiles}) |
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124 | |
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125 | [[ -z ${confversion} && -r "configure" ]] && \ |
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126 | confversion=$(generated_version configure) |
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127 | |
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128 | if [[ ${confversion} == "2.1" && ! -f "configure.ac" ]] ; then |
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129 | binary="${binary_old}" |
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130 | fi |
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131 | esac |
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132 | fi |
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133 | fi |
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134 | |
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135 | if [[ -n ${WANT_ACWRAPPER_DEBUG} ]] ; then |
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136 | if [[ -n ${WANT_AUTOCONF} ]] ; then |
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137 | echo "ac-wrapper: DEBUG: WANT_AUTOCONF is set to ${WANT_AUTOCONF}" >&2 |
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138 | fi |
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139 | echo "ac-wrapper: DEBUG: will execute <${binary}>" >&2 |
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140 | fi |
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141 | |
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142 | # |
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143 | # for further consistency |
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144 | # |
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145 | if [[ ${binary} == "${binary_new}" ]] ; then |
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146 | export WANT_AUTOCONF="2.5" |
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147 | elif [[ ${binary} == "${binary_old}" ]] ; then |
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148 | export WANT_AUTOCONF="2.1" |
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149 | fi |
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150 | |
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151 | if [[ ! -x ${binary} ]] ; then |
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152 | # this shouldn't happen |
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153 | echo "ac-wrapper: ${binary} is missing or not executable." >&2 |
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154 | echo " Please try emerging the correct version of autoconf." >&2 |
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155 | exit 1 |
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156 | fi |
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157 | |
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158 | exec "${binary}" "$@" |
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159 | |
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160 | echo "ac-wrapper: was unable to exec ${binary} !?" >&2 |
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161 | exit 1 |
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