[gtksourceview/wip/ax-pkg-check: 1/2] build: use AX_PKG_CHECK_MODULES

[Sébastien Wilmet <swilmet src gnome org>]

commit 0393ce49d224504cf77bf6f0d3d0ca92780e47b8
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sun Aug 30 14:07:05 2015 +0200

    build: use AX_PKG_CHECK_MODULES
    
    It simplifies the pkg-config file.
    
    https://tecnocode.co.uk/2014/12/09/a-checklist-for-writing-pkg-config-files/
    https://wiki.gnome.org/Initiatives/GnomeGoals/ModernAutotools

 configure.ac            |   22 ++++++++--------------
 gtksourceview-3.0.pc.in |    4 ++--
 2 files changed, 10 insertions(+), 16 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 7f14bf0..d83dbd2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -37,13 +37,10 @@ GSV_LT_VERSION="$GSV_LT_CURRENT:$GSV_LT_REVISION:$GSV_LT_AGE"
 AC_SUBST(GSV_LT_VERSION)
 
 # Dependencies
-GLIB_REQUIRED_VERSION=2.44
-GTK_REQUIRED_VERSION=3.16
-LIBXML_REQUIRED_VERSION=2.6.0
-GLADE_UI_REQUIRED=3.9
-
-AC_SUBST(GTK_REQUIRED_VERSION)
-AC_SUBST(LIBXML_REQUIRED_VERSION)
+glib_req=2.44
+gtk_req=3.16
+libxml_req=2.6.0
+gladeui_req=3.9
 
 AC_CONFIG_SRCDIR([gtksourceview/gtksourcebuffer.h])
 AC_CONFIG_HEADER([config.h])
@@ -88,12 +85,9 @@ if test "$enable_deprecations" = "no"; then
        AC_SUBST(DISABLE_DEPRECATED_CFLAGS)
 fi
 
-PKG_CHECK_MODULES(DEP, [
-       glib-2.0 >= $GLIB_REQUIRED_VERSION
-       gio-2.0 >= $GLIB_REQUIRED_VERSION
-       gtk+-3.0 >= $GTK_REQUIRED_VERSION
-       libxml-2.0 >= $LIBXML_REQUIRED_VERSION
-])
+AX_PKG_CHECK_MODULES(DEP,
+                    [glib-2.0 >= $glib_req  gio-2.0 >= $glib_req  gtk+-3.0 >= $gtk_req],
+                    [libxml-2.0 >= $libxml_req])
 
 dnl Check to enable completion providers
 AC_ARG_ENABLE(providers,
@@ -124,7 +118,7 @@ AC_ARG_ENABLE([glade-catalog],
 AM_CONDITIONAL([GLADE_CATALOG], [ test "$glade_catalog" = "yes" ])
 
 AS_IF([ test "$glade_catalog" = "yes" ],
-       [PKG_CHECK_MODULES(GLADE, [gladeui-2.0 >= $GLADE_UI_REQUIRED])
+       [PKG_CHECK_MODULES(GLADE, [gladeui-2.0 >= $gladeui_req])
         AC_MSG_CHECKING([whether to install Glade catalog])
         GLADE_CATALOG_DIR=`$PKG_CONFIG --variable=catalogdir gladeui-2.0 2>&AS_MESSAGE_LOG_FD`
         AC_MSG_RESULT([$GLADE_CATALOG_DIR])
diff --git a/gtksourceview-3.0.pc.in b/gtksourceview-3.0.pc.in
index 7e19a99..8cc0d6a 100644
--- a/gtksourceview-3.0.pc.in
+++ b/gtksourceview-3.0.pc.in
@@ -6,7 +6,7 @@ includedir= includedir@
 Name: @PACKAGE_NAME@
 Description: GTK+ 3.0 Source Editing Widget
 Version: @PACKAGE_VERSION@
-Requires: gtk+-3.0 >= @GTK_REQUIRED_VERSION@
-Requires.private: libxml-2.0 >= @LIBXML_REQUIRED_VERSION@
+Requires: @AX_PACKAGE_REQUIRES@
+Requires.private: @AX_PACKAGE_REQUIRES_PRIVATE@
 Libs: -L${libdir} -lgtksourceview-3.0
 Cflags: -I${includedir}/gtksourceview-3.0