# ===========================================================================

#   https://www.gnu.org/software/autoconf-archive/ax_pkg_check_modules.html

# ===========================================================================

#

# SYNOPSIS

#

#   AX_PKG_CHECK_MODULES(PREFIX, PUBLIC-MODULES, PRIVATE-MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], [PUBLIC-VARIABLE], [PRIVATE-VARIABLE])

#

# DESCRIPTION

#

#   A wrapper around PKG_CHECK_MODULES which splits the list of modules into

#   public and private dependencies, and produces two variables listing the

#   dependencies across all invocations of AX_PKG_CHECK_MODULES. These two

#   variables are exposed via AC_SUBST, and should be used in a pkg-config

#   file as the substituted values for Requires and Requires.private.

#

#   The PREFIX, PUBLIC-MODULES and PRIVATE-MODULES arguments should be

#   specified as for PKG_CHECK_MODULES, with the concatenation of

#   PUBLIC-MODULES and PRIVATE-MODULES equaling the LIST-OF-MODULES from

#   PKG_CHECK_MODULES.  The ACTION-IF-FOUND and ACTION-IF-NOT-FOUND

#   arguments are optional, and should also be specified as for

#   PKG_CHECK_MODULES.  ACTION-IF-FOUND is evaluated if the full

#   LIST-OF-MODULES is found; ACTION-IF-NOT-FOUND similarly.

#

#   PUBLIC-VARIABLE defaults to AX_PACKAGE_REQUIRES, and PRIVATE-VARIABLE

#   defaults to AX_PACKAGE_REQUIRES_PRIVATE.  Both variables are AC_SUBST-ed

#   by this macro.

#

#   For example:

#

#     AX_PKG_CHECK_MODULES([GLIB],[glib-2.0 gio-2.0],[gthread-2.0])

#     AX_PKG_CHECK_MODULES([DBUS],[],[dbus-glib-1 >= 0.98 dbus-1])

#

#   results in the substitutions:

#

#     AX_PACKAGE_REQUIRES="glib-2.0 gio-2.0"

#     AX_PACKAGE_REQUIRES_PRIVATE="gthread-2.0 dbus-glib-1 >= 0.98 dbus-1"

#

#   and can be used with a template pkg-config file (.pc.in) using:

#

#     Requires: @AX_PACKAGE_REQUIRES@

#     Requires.private: @AX_PACKAGE_REQUIRES_PRIVATE@

#

# LICENSE

#

#   Copyright (c) 2014 Philip Withnall <philip@tecnocode.co.uk>

#

#   Copying and distribution of this file, with or without modification, are

#   permitted in any medium without royalty provided the copyright notice

#   and this notice are preserved.  This file is offered as-is, without any

#   warranty.

#serial 4

AC_DEFUN([AX_PKG_CHECK_MODULES],[

    m4_define([ax_package_requires],

              [m4_default_quoted([$6],[AX_PACKAGE_REQUIRES])])

    m4_define([ax_package_requires_private],

              [m4_default_quoted([$7],[AX_PACKAGE_REQUIRES_PRIVATE])])

    ax_package_requires="$[]ax_package_requires m4_normalize($2)"

    ax_package_requires_private="$[]ax_package_requires_private m4_normalize($3)"

    PKG_CHECK_MODULES([$1],[$2 $3],[$4],[$5])

    # Substitute output.

    AC_SUBST(ax_package_requires)

    AC_SUBST(ax_package_requires_private)

])dnl AX_PKG_CHECK_MODULES