144 lines
3.9 KiB
Groff
144 lines
3.9 KiB
Groff
.\" Copyright (c) 2017 pkgconf authors (see AUTHORS).
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.\"
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.\" Permission to use, copy, modify, and/or distribute this software for any
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.\" purpose with or without fee is hereby granted, provided that the above
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.\" copyright notice and this permission notice appear in all copies.
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.\"
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.\" This software is provided 'as is' and without any warranty, express or
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.\" implied. In no event shall the authors be liable for any damages arising
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.\" from the use of this software.
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.Dd December 5, 2017
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.Dt PKG.M4 7
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.Os
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.Sh NAME
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.Nm pkg.m4
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.Nd autoconf macros for using pkgconf
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.Sh SYNOPSIS
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.Nm PKG_PREREQ
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.Nm PKG_PROG_PKG_CONFIG
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.Nm PKG_CHECK_MODULES
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.Nm PKG_CHECK_MODULES_STATIC
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.Nm PKG_INSTALLDIR
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.Nm PKG_NOARCH_INSTALLDIR
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.Nm PKG_CHECK_VAR
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.Nm PKG_WITH_MODULES
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.Nm PKG_HAVE_WITH_MODULES
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.Nm PKG_HAVE_DEFINE_WITH_MODULES
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.Sh DESCRIPTION
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.Nm
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is a collection of autoconf macros which help to configure compiler and linker
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flags for development libraries.
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This allows build systems to detect other dependencies and use them with the
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system toolchain.
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.Sh "AUTOCONF MACROS"
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.Ss "PKG_PREREQ(MIN-VERSION)"
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Checks that the version of the
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.Nm
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autoconf macros in use is at least MIN-VERSION.
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This can be used to ensure a particular
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.Nm
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macro will be available.
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.Ss "PKG_PROG_PKG_CONFIG([MIN-VERSION])"
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Checks for an implementation of
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.Nm pkg-config
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which is at least MIN-VERSION or newer.
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.Ss "PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES [,ACTION-IF-FOUND [,ACTION-IF-NOT-FOUND]])"
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.Ss "PKG_CHECK_MODULES_STATIC(VARIABLE-PREFIX, MODULES [,ACTION-IF-FOUND [,ACTION-IF-NOT-FOUND]])"
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Checks whether a given module set exists, and if so, defines
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.Nm CFLAGS
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and
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.Nm LIBS
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variables prefixed by
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.Nm VARIABLE-PREFIX
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with the output from
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.Fl -cflags
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and
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.Fl -libs
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respectively.
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.Pp
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The optional
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.Nm ACTION-IF-FOUND
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and
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.Nm ACTION-IF-NOT-FOUND
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arguments are shell fragments that should be executed if the module set is
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found or not found.
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.Pp
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If
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.Nm $PKG_CONFIG
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is not defined, the
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.Nm PKG_PROG_PKG_CONFIG
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macro will be executed to locate a
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.Nm pkg-config
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implementation.
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.Pp
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The
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.Nm PKG_CHECK_MODULES_STATIC
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macro provides the same behaviour as
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.Nm PKG_CHECK_MODULES
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with static linking enabled via the
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.Fl -static
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flag.
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.Ss "PKG_INSTALLDIR(DIRECTORY)"
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Defines the variable $pkgconfigdir as the location where a package
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should install pkg-config .pc files.
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.Pp
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By default the directory is $libdir/pkgconfig, but the default can
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be changed by passing the
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.Nm DIRECTORY
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parameter.
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.Pp
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This value can be overridden with the
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.Fl -with-pkgconfigdir
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configure parameter.
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.Ss "PKG_NOARCH_INSTALLDIR(DIRECTORY)"
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Defines the variable $noarch_pkgconfigdir as the location where a package
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should install pkg-config .pc files.
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.Pp
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By default the directory is $datadir/pkgconfig, but the default can
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be changed by passing the
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.Nm DIRECTORY
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parameter.
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.Pp
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This value can be overridden with the
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.Fl -with-noarch-pkgconfigdir
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configure parameter.
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.Ss "PKG_CHECK_VAR(VARIABLE, MODULE, CONFIG-VARIABLE, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])"
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Retrieves the value of the
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.Nm pkg-config
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variable
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.Nm CONFIG-VARIABLE
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from
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.Nm MODULE
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and stores it in the
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.Nm VARIABLE
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variable.
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.Pp
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Note that repeated usage of
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.Nm VARIABLE
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is not recommended as the check will be skipped if the variable is
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already set.
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.Ss "PKG_WITH_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND], [DESCRIPTION], [DEFAULT])"
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Prepares a "--with-" configure option using the lowercase
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.Nm VARIABLE-PREFIX
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name, merging the behaviour of
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.Nm AC_ARG_WITH
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and
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.Nm PKG_CHECK_MODULES
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in a single macro.
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.Ss "PKG_HAVE_WITH_MODULES(VARIABLE-PREFIX, MODULES, [DESCRIPTION], [DEFAULT])"
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Convenience macro to trigger
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.Nm AM_CONDITIONAL
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after a
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.Nm PKG_WITH_MODULES check.\&
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.Nm VARIABLE-PREFIX
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is exported as a make variable.
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.Ss "PKG_HAVE_DEFINE_WITH_MODULES(VARIABLE-PREFIX, MODULES, [DESCRIPTION], [DEFAULT])"
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Convenience macro to trigger
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.Nm AM_CONDITIONAL
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and
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.Nm AC_DEFINE
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after a
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.Nm PKG_WITH_MODULES check.\&
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.Nm VARIABLE-PREFIX
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is exported as a make variable.
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