[librsvg] configure.ac: Increase freetype2 requirement to 2.9.0

[Federico Mena Quintero <federico src gnome org>]

commit 08da34e832daa441212b990e061b06e4650b6d60
Author: Federico Mena Quintero <federico gnome org>
Date:   Thu Feb 15 18:33:22 2018 -0600

    configure.ac: Increase freetype2 requirement to 2.9.0
    
    Note that freetype2 uses the libtool version for its pkg-config macro (!?)

 configure.ac | 29 ++++++++++++++++-------------
 1 file changed, 16 insertions(+), 13 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 57d6e510..98465b34 100644
--- a/configure.ac
+++ b/configure.ac
@@ -38,14 +38,16 @@ AC_SUBST([LIBRSVG_MICRO_VERSION],[rsvg_micro_version])
 
 dnl ===========================================================================
 
-GLIB_REQUIRED=2.52.0
-GIO_REQUIRED=2.24.0
-LIBXML_REQUIRED=2.9.0
 CAIRO_REQUIRED=1.15.4
-PANGO_REQUIRED=1.38.0
+CROCO_REQUIRED=0.6.1
+dnl This corresponds to Freetype2 2.8
+FREETYPE2_REQUIRED=20.0.14
 GDK_PIXBUF_REQUIRED=2.20
+GIO_REQUIRED=2.24.0
+GLIB_REQUIRED=2.52.0
 GTK3_REQUIRED=3.10.0
-CROCO_REQUIRED=0.6.1
+LIBXML_REQUIRED=2.9.0
+PANGO_REQUIRED=1.38.0
 
 dnl ===========================================================================
 
@@ -108,15 +110,16 @@ dnl ===========================================================================
 GLIB_MKENUMS=`$PKG_CONFIG --variable=glib_mkenums glib-2.0`
 AC_SUBST(GLIB_MKENUMS)
 
-PKG_CHECK_MODULES(LIBRSVG, \
+PKG_CHECK_MODULES(LIBRSVG,                     \
+       cairo >= $CAIRO_REQUIRED               \
+       cairo-png >= $CAIRO_REQUIRED           \
+       freetype2 >= $FREETYPE2_REQUIRED       \
        gdk-pixbuf-2.0 >= $GDK_PIXBUF_REQUIRED \
-       glib-2.0 >= $GLIB_REQUIRED \
-       gio-2.0 >= $GIO_REQUIRED \
-       libxml-2.0 >= $LIBXML_REQUIRED \
-       pangocairo >= $PANGO_REQUIRED \
-       pangoft2 >= $PANGO_REQUIRED \
-       cairo >= $CAIRO_REQUIRED \
-       cairo-png >= $CAIRO_REQUIRED
+       gio-2.0 >= $GIO_REQUIRED               \
+       glib-2.0 >= $GLIB_REQUIRED             \
+       libxml-2.0 >= $LIBXML_REQUIRED         \
+       pangocairo >= $PANGO_REQUIRED          \
+       pangoft2 >= $PANGO_REQUIRED            \
         libcroco-0.6 >= $CROCO_REQUIRED)
 
 PKG_CHECK_MODULES([GTHREAD],[gthread-2.0 >= $GLIB_REQUIRED])