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annotate m4/pkg.m4 @ 16033:23a7661e529a ss-3-7-2

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snapshot version 3.7.2 * configure.ac (AC_INIT): Set version to 3.7.2. (OCTAVE_RELEASE_DATE): Set to 2013-02-09. (OCTAVE_COPYRIGHT): Update year.
author John W. Eaton <jwe@octave.org>
date Sun, 10 Feb 2013 00:59:19 -0500
parents 4b82664f526b
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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4b82664f526b build: Move non-Octave Autoconf pkg macros from acinclude.m4 to a separate file.
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1 # pkg.m4 - Macros to locate and utilise pkg-config. -*- Autoconf -*-
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2 #
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3 # Copyright © 2004 Scott James Remnant <scott@netsplit.com>.
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4 #
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5 # This program is free software; you can redistribute it and/or modify
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6 # it under the terms of the GNU General Public License as published by
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7 # the Free Software Foundation; either version 2 of the License, or
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8 # (at your option) any later version.
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9 #
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10 # This program is distributed in the hope that it will be useful, but
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11 # WITHOUT ANY WARRANTY; without even the implied warranty of
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12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 # General Public License for more details.
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14 #
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15 # You should have received a copy of the GNU General Public License
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16 # along with this program; if not, write to the Free Software
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17 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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18 #
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19 # As a special exception to the GNU General Public License, if you
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20 # distribute this file as part of a program that contains a
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21 # configuration script generated by Autoconf, you may include it under
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22 # the same distribution terms that you use for the rest of that program.
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23
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24 # PKG_PROG_PKG_CONFIG([MIN-VERSION])
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25 # ----------------------------------
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26 AC_DEFUN([PKG_PROG_PKG_CONFIG],
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27 [m4_pattern_forbid([^_?PKG_[A-Z_]+$])
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28 m4_pattern_allow([^PKG_CONFIG(_PATH)?$])
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29 AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])dnl
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30 if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
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31 AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
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32 fi
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33 if test -n "$PKG_CONFIG"; then
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34 _pkg_min_version=m4_default([$1], [0.9.0])
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35 AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])
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36 if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
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37 AC_MSG_RESULT([yes])
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38 else
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39 AC_MSG_RESULT([no])
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40 PKG_CONFIG=""
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41 fi
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42
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43 fi[]dnl
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44 ])# PKG_PROG_PKG_CONFIG
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45
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46 # PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
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47 #
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48 # Check to see whether a particular set of modules exists. Similar
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49 # to PKG_CHECK_MODULES(), but does not set variables or print errors.
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50 #
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51 #
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52 # Similar to PKG_CHECK_MODULES, make sure that the first instance of
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53 # this or PKG_CHECK_MODULES is called, or make sure to call
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54 # PKG_CHECK_EXISTS manually
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55 # --------------------------------------------------------------
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56 AC_DEFUN([PKG_CHECK_EXISTS],
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57 [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
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58 if test -n "$PKG_CONFIG" && \
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59 AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then
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60 m4_ifval([$2], [$2], [:])
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61 m4_ifvaln([$3], [else
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62 $3])dnl
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63 fi])
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64
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65
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66 # _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])
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67 # ---------------------------------------------
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68 m4_define([_PKG_CONFIG],
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69 [if test -n "$PKG_CONFIG"; then
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70 if test -n "$$1"; then
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71 pkg_cv_[]$1="$$1"
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72 else
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73 PKG_CHECK_EXISTS([$3],
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74 [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`],
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75 [pkg_failed=yes])
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76 fi
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77 else
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78 pkg_failed=untried
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79 fi[]dnl
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80 ])# _PKG_CONFIG
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81
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82 # _PKG_SHORT_ERRORS_SUPPORTED
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83 # -----------------------------
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84 AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED],
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85 [AC_REQUIRE([PKG_PROG_PKG_CONFIG])
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86 if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
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87 _pkg_short_errors_supported=yes
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88 else
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89 _pkg_short_errors_supported=no
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90 fi[]dnl
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91 ])# _PKG_SHORT_ERRORS_SUPPORTED
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92
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93
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94 # PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
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95 # [ACTION-IF-NOT-FOUND])
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96 #
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97 #
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98 # Note that if there is a possibility the first call to
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99 # PKG_CHECK_MODULES might not happen, you should be sure to include an
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100 # explicit call to PKG_PROG_PKG_CONFIG in your configure.ac
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101 #
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102 #
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103 # --------------------------------------------------------------
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104 AC_DEFUN([PKG_CHECK_MODULES],
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105 [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
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106 AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
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107 AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl
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108
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109 pkg_failed=no
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110 AC_MSG_CHECKING([for $1])
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111
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112 _PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
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113 _PKG_CONFIG([$1][_LIBS], [libs], [$2])
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114
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115 m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS
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116 and $1[]_LIBS to avoid the need to call pkg-config.
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117 See the pkg-config man page for more details.])
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118
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119 if test $pkg_failed = yes; then
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120 _PKG_SHORT_ERRORS_SUPPORTED
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121 if test $_pkg_short_errors_supported = yes; then
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122 $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --errors-to-stdout --print-errors "$2"`
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123 else
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124 $1[]_PKG_ERRORS=`$PKG_CONFIG --errors-to-stdout --print-errors "$2"`
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125 fi
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126 # Put the nasty error message in config.log where it belongs
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127 echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD
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128
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129 ifelse([$4], , [AC_MSG_ERROR(dnl
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130 [Package requirements ($2) were not met:
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131
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132 $$1_PKG_ERRORS
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133
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134 Consider adjusting the PKG_CONFIG_PATH environment variable if you
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135 installed software in a non-standard prefix.
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136
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137 _PKG_TEXT
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138 ])],
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139 [AC_MSG_RESULT([no])
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140 $4])
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141 elif test $pkg_failed = untried; then
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142 ifelse([$4], , [AC_MSG_FAILURE(dnl
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143 [The pkg-config script could not be found or is too old. Make sure it
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144 is in your PATH or set the PKG_CONFIG environment variable to the full
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145 path to pkg-config.
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146
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147 _PKG_TEXT
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148
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149 To get pkg-config, see <http://pkg-config.freedesktop.org/>.])],
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150 [$4])
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151 else
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152 $1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS
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153 $1[]_LIBS=$pkg_cv_[]$1[]_LIBS
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154 AC_MSG_RESULT([yes])
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155 ifelse([$3], , :, [$3])
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156 fi[]dnl
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157 ])# PKG_CHECK_MODULES