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 |
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