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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 "$$1"; then |
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70 pkg_cv_[]$1="$$1" |
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71 elif test -n "$PKG_CONFIG"; then |
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72 PKG_CHECK_EXISTS([$3], |
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73 [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`], |
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74 [pkg_failed=yes]) |
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75 else |
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76 pkg_failed=untried |
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77 fi[]dnl |
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78 ])# _PKG_CONFIG |
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79 |
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80 # _PKG_SHORT_ERRORS_SUPPORTED |
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81 # ----------------------------- |
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82 AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED], |
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83 [AC_REQUIRE([PKG_PROG_PKG_CONFIG]) |
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84 if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then |
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85 _pkg_short_errors_supported=yes |
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86 else |
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87 _pkg_short_errors_supported=no |
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88 fi[]dnl |
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89 ])# _PKG_SHORT_ERRORS_SUPPORTED |
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90 |
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91 |
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92 # PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND], |
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93 # [ACTION-IF-NOT-FOUND]) |
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94 # |
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95 # |
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96 # Note that if there is a possibility the first call to |
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97 # PKG_CHECK_MODULES might not happen, you should be sure to include an |
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98 # explicit call to PKG_PROG_PKG_CONFIG in your configure.ac |
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99 # |
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100 # |
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101 # -------------------------------------------------------------- |
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102 AC_DEFUN([PKG_CHECK_MODULES], |
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103 [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl |
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104 AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl |
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105 AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl |
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106 |
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107 pkg_failed=no |
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108 AC_MSG_CHECKING([for $1]) |
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109 |
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110 _PKG_CONFIG([$1][_CFLAGS], [cflags], [$2]) |
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111 _PKG_CONFIG([$1][_LIBS], [libs], [$2]) |
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112 |
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113 m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS |
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114 and $1[]_LIBS to avoid the need to call pkg-config. |
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115 See the pkg-config man page for more details.]) |
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116 |
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117 if test $pkg_failed = yes; then |
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118 _PKG_SHORT_ERRORS_SUPPORTED |
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119 if test $_pkg_short_errors_supported = yes; then |
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120 $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors "$2" 2>&1` |
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121 else |
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122 $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors "$2" 2>&1` |
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123 fi |
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124 # Put the nasty error message in config.log where it belongs |
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125 echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD |
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126 |
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127 ifelse([$4], , [AC_MSG_ERROR(dnl |
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128 [Package requirements ($2) were not met: |
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129 |
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130 $$1_PKG_ERRORS |
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131 |
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132 Consider adjusting the PKG_CONFIG_PATH environment variable if you |
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133 installed software in a non-standard prefix. |
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134 |
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135 _PKG_TEXT |
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136 ])], |
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137 [AC_MSG_RESULT([no]) |
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138 $4]) |
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139 elif test $pkg_failed = untried; then |
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140 ifelse([$4], , [AC_MSG_FAILURE(dnl |
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141 [The pkg-config script could not be found or is too old. Make sure it |
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142 is in your PATH or set the PKG_CONFIG environment variable to the full |
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143 path to pkg-config. |
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144 |
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145 _PKG_TEXT |
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146 |
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147 To get pkg-config, see <http://pkg-config.freedesktop.org/>.])], |
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148 [$4]) |
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149 else |
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150 $1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS |
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151 $1[]_LIBS=$pkg_cv_[]$1[]_LIBS |
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152 AC_MSG_RESULT([yes]) |
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153 ifelse([$3], , :, [$3]) |
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154 fi[]dnl |
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155 ])# PKG_CHECK_MODULES |