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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