1# pkg.m4 - Macros to locate and utilise pkg-config. -*- Autoconf -*- 2# serial 12 (pkg-config-0.29.2) 3 4dnl Copyright © 2004 Scott James Remnant <scott@netsplit.com>. 5dnl Copyright © 2012-2015 Dan Nicholson <dbn.lists@gmail.com> 6dnl 7dnl This program is free software; you can redistribute it and/or modify 8dnl it under the terms of the GNU General Public License as published by 9dnl the Free Software Foundation; either version 2 of the License, or 10dnl (at your option) any later version. 11dnl 12dnl This program is distributed in the hope that it will be useful, but 13dnl WITHOUT ANY WARRANTY; without even the implied warranty of 14dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15dnl General Public License for more details. 16dnl 17dnl You should have received a copy of the GNU General Public License 18dnl along with this program; if not, write to the Free Software 19dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 20dnl 02111-1307, USA. 21dnl 22dnl As a special exception to the GNU General Public License, if you 23dnl distribute this file as part of a program that contains a 24dnl configuration script generated by Autoconf, you may include it under 25dnl the same distribution terms that you use for the rest of that 26dnl program. 27 28dnl PKG_PREREQ(MIN-VERSION) 29dnl ----------------------- 30dnl Since: 0.29 31dnl 32dnl Verify that the version of the pkg-config macros are at least 33dnl MIN-VERSION. Unlike PKG_PROG_PKG_CONFIG, which checks the user's 34dnl installed version of pkg-config, this checks the developer's version 35dnl of pkg.m4 when generating configure. 36dnl 37dnl To ensure that this macro is defined, also add: 38dnl m4_ifndef([PKG_PREREQ], 39dnl [m4_fatal([must install pkg-config 0.29 or later before running autoconf/autogen])]) 40dnl 41dnl See the "Since" comment for each macro you use to see what version 42dnl of the macros you require. 43m4_defun([PKG_PREREQ], 44[m4_define([PKG_MACROS_VERSION], [0.29.2]) 45m4_if(m4_version_compare(PKG_MACROS_VERSION, [$1]), -1, 46 [m4_fatal([pkg.m4 version $1 or higher is required but ]PKG_MACROS_VERSION[ found])]) 47])dnl PKG_PREREQ 48 49dnl PKG_PROG_PKG_CONFIG([MIN-VERSION]) 50dnl ---------------------------------- 51dnl Since: 0.16 52dnl 53dnl Search for the pkg-config tool and set the PKG_CONFIG variable to 54dnl first found in the path. Checks that the version of pkg-config found 55dnl is at least MIN-VERSION. If MIN-VERSION is not specified, 0.9.0 is 56dnl used since that's the first version where most current features of 57dnl pkg-config existed. 58AC_DEFUN([PKG_PROG_PKG_CONFIG], 59[m4_pattern_forbid([^_?PKG_[A-Z_]+$]) 60m4_pattern_allow([^PKG_CONFIG(_(PATH|LIBDIR|SYSROOT_DIR|ALLOW_SYSTEM_(CFLAGS|LIBS)))?$]) 61m4_pattern_allow([^PKG_CONFIG_(DISABLE_UNINSTALLED|TOP_BUILD_DIR|DEBUG_SPEW)$]) 62AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility]) 63AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to pkg-config's search path]) 64AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's built-in search path]) 65 66if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then 67 AC_PATH_TOOL([PKG_CONFIG], [pkg-config]) 68fi 69if test -n "$PKG_CONFIG"; then 70 _pkg_min_version=m4_default([$1], [0.9.0]) 71 AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version]) 72 if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then 73 AC_MSG_RESULT([yes]) 74 else 75 AC_MSG_RESULT([no]) 76 PKG_CONFIG="" 77 fi 78fi[]dnl 79])dnl PKG_PROG_PKG_CONFIG 80 81dnl PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) 82dnl ------------------------------------------------------------------- 83dnl Since: 0.18 84dnl 85dnl Check to see whether a particular set of modules exists. Similar to 86dnl PKG_CHECK_MODULES(), but does not set variables or print errors. 87dnl 88dnl Please remember that m4 expands AC_REQUIRE([PKG_PROG_PKG_CONFIG]) 89dnl only at the first occurrence in configure.ac, so if the first place 90dnl it's called might be skipped (such as if it is within an "if", you 91dnl have to call PKG_CHECK_EXISTS manually 92AC_DEFUN([PKG_CHECK_EXISTS], 93[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl 94if test -n "$PKG_CONFIG" && \ 95 AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then 96 m4_default([$2], [:]) 97m4_ifvaln([$3], [else 98 $3])dnl 99fi]) 100 101dnl _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES]) 102dnl --------------------------------------------- 103dnl Internal wrapper calling pkg-config via PKG_CONFIG and setting 104dnl pkg_failed based on the result. 105m4_define([_PKG_CONFIG], 106[if test -n "$$1"; then 107 pkg_cv_[]$1="$$1" 108 elif test -n "$PKG_CONFIG"; then 109 PKG_CHECK_EXISTS([$3], 110 [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null` 111 test "x$?" != "x0" && pkg_failed=yes ], 112 [pkg_failed=yes]) 113 else 114 pkg_failed=untried 115fi[]dnl 116])dnl _PKG_CONFIG 117 118dnl _PKG_SHORT_ERRORS_SUPPORTED 119dnl --------------------------- 120dnl Internal check to see if pkg-config supports short errors. 121AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED], 122[AC_REQUIRE([PKG_PROG_PKG_CONFIG]) 123if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then 124 _pkg_short_errors_supported=yes 125else 126 _pkg_short_errors_supported=no 127fi[]dnl 128])dnl _PKG_SHORT_ERRORS_SUPPORTED 129 130 131dnl PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND], 132dnl [ACTION-IF-NOT-FOUND]) 133dnl -------------------------------------------------------------- 134dnl Since: 0.4.0 135dnl 136dnl Note that if there is a possibility the first call to 137dnl PKG_CHECK_MODULES might not happen, you should be sure to include an 138dnl explicit call to PKG_PROG_PKG_CONFIG in your configure.ac 139AC_DEFUN([PKG_CHECK_MODULES], 140[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl 141AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl 142AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl 143 144pkg_failed=no 145AC_MSG_CHECKING([for $2]) 146 147_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2]) 148_PKG_CONFIG([$1][_LIBS], [libs], [$2]) 149 150m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS 151and $1[]_LIBS to avoid the need to call pkg-config. 152See the pkg-config man page for more details.]) 153 154if test $pkg_failed = yes; then 155 AC_MSG_RESULT([no]) 156 _PKG_SHORT_ERRORS_SUPPORTED 157 if test $_pkg_short_errors_supported = yes; then 158 $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "$2" 2>&1` 159 else 160 $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "$2" 2>&1` 161 fi 162 # Put the nasty error message in config.log where it belongs 163 echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD 164 165 m4_default([$4], [AC_MSG_ERROR( 166[Package requirements ($2) were not met: 167 168$$1_PKG_ERRORS 169 170Consider adjusting the PKG_CONFIG_PATH environment variable if you 171installed software in a non-standard prefix. 172 173_PKG_TEXT])[]dnl 174 ]) 175elif test $pkg_failed = untried; then 176 AC_MSG_RESULT([no]) 177 m4_default([$4], [AC_MSG_FAILURE( 178[The pkg-config script could not be found or is too old. Make sure it 179is in your PATH or set the PKG_CONFIG environment variable to the full 180path to pkg-config. 181 182_PKG_TEXT 183 184To get pkg-config, see <http://pkg-config.freedesktop.org/>.])[]dnl 185 ]) 186else 187 $1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS 188 $1[]_LIBS=$pkg_cv_[]$1[]_LIBS 189 AC_MSG_RESULT([yes]) 190 $3 191fi[]dnl 192])dnl PKG_CHECK_MODULES 193 194 195dnl PKG_CHECK_MODULES_STATIC(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND], 196dnl [ACTION-IF-NOT-FOUND]) 197dnl --------------------------------------------------------------------- 198dnl Since: 0.29 199dnl 200dnl Checks for existence of MODULES and gathers its build flags with 201dnl static libraries enabled. Sets VARIABLE-PREFIX_CFLAGS from --cflags 202dnl and VARIABLE-PREFIX_LIBS from --libs. 203dnl 204dnl Note that if there is a possibility the first call to 205dnl PKG_CHECK_MODULES_STATIC might not happen, you should be sure to 206dnl include an explicit call to PKG_PROG_PKG_CONFIG in your 207dnl configure.ac. 208AC_DEFUN([PKG_CHECK_MODULES_STATIC], 209[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl 210_save_PKG_CONFIG=$PKG_CONFIG 211PKG_CONFIG="$PKG_CONFIG --static" 212PKG_CHECK_MODULES($@) 213PKG_CONFIG=$_save_PKG_CONFIG[]dnl 214])dnl PKG_CHECK_MODULES_STATIC 215 216 217dnl PKG_INSTALLDIR([DIRECTORY]) 218dnl ------------------------- 219dnl Since: 0.27 220dnl 221dnl Substitutes the variable pkgconfigdir as the location where a module 222dnl should install pkg-config .pc files. By default the directory is 223dnl $libdir/pkgconfig, but the default can be changed by passing 224dnl DIRECTORY. The user can override through the --with-pkgconfigdir 225dnl parameter. 226AC_DEFUN([PKG_INSTALLDIR], 227[m4_pushdef([pkg_default], [m4_default([$1], ['${libdir}/pkgconfig'])]) 228m4_pushdef([pkg_description], 229 [pkg-config installation directory @<:@]pkg_default[@:>@]) 230AC_ARG_WITH([pkgconfigdir], 231 [AS_HELP_STRING([--with-pkgconfigdir], pkg_description)],, 232 [with_pkgconfigdir=]pkg_default) 233AC_SUBST([pkgconfigdir], [$with_pkgconfigdir]) 234m4_popdef([pkg_default]) 235m4_popdef([pkg_description]) 236])dnl PKG_INSTALLDIR 237 238 239dnl PKG_NOARCH_INSTALLDIR([DIRECTORY]) 240dnl -------------------------------- 241dnl Since: 0.27 242dnl 243dnl Substitutes the variable noarch_pkgconfigdir as the location where a 244dnl module should install arch-independent pkg-config .pc files. By 245dnl default the directory is $datadir/pkgconfig, but the default can be 246dnl changed by passing DIRECTORY. The user can override through the 247dnl --with-noarch-pkgconfigdir parameter. 248AC_DEFUN([PKG_NOARCH_INSTALLDIR], 249[m4_pushdef([pkg_default], [m4_default([$1], ['${datadir}/pkgconfig'])]) 250m4_pushdef([pkg_description], 251 [pkg-config arch-independent installation directory @<:@]pkg_default[@:>@]) 252AC_ARG_WITH([noarch-pkgconfigdir], 253 [AS_HELP_STRING([--with-noarch-pkgconfigdir], pkg_description)],, 254 [with_noarch_pkgconfigdir=]pkg_default) 255AC_SUBST([noarch_pkgconfigdir], [$with_noarch_pkgconfigdir]) 256m4_popdef([pkg_default]) 257m4_popdef([pkg_description]) 258])dnl PKG_NOARCH_INSTALLDIR 259 260 261dnl PKG_CHECK_VAR(VARIABLE, MODULE, CONFIG-VARIABLE, 262dnl [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) 263dnl ------------------------------------------- 264dnl Since: 0.28 265dnl 266dnl Retrieves the value of the pkg-config variable for the given module. 267AC_DEFUN([PKG_CHECK_VAR], 268[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl 269AC_ARG_VAR([$1], [value of $3 for $2, overriding pkg-config])dnl 270 271_PKG_CONFIG([$1], [variable="][$3]["], [$2]) 272AS_VAR_COPY([$1], [pkg_cv_][$1]) 273 274AS_VAR_IF([$1], [""], [$5], [$4])dnl 275])dnl PKG_CHECK_VAR 276