[gimp] Bug 794772 - detect freetype2 using pkg-config.

[Jehan Pagès <jehanp src gnome org>]

commit 527ad94a7e2f27113b9c33c1fffe77947c93e993
Author: Jehan <jehan girinstud io>
Date:   Wed Mar 28 19:43:17 2018 +0200

    Bug 794772 - detect freetype2 using pkg-config.
    
    I hesitated keeping both the pkg-config and freetype-config (which is
    mostly a wrapper to pkg-config nowadays apparently) as fallback, but
    anyway I can see in their repositories that they have a pkg-config file
    since 2003. Really I don't think it makes sense to hold onto such old
    and deprecated dependency configuration systems.

 configure.ac |    9 ++-------
 1 files changed, 2 insertions(+), 7 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 6b27bb1..dbeb85a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -863,13 +863,8 @@ if test "x$fontconfig_ok" = xno; then
 fi
 
 
-AC_PATH_PROG(FREETYPE_CONFIG, freetype-config, no)
-if test "x$FREETYPE_CONFIG" != "xno" ; then
-  AC_MSG_CHECKING([for freetype libraries])
-  FREETYPE_LIBS=`$FREETYPE_CONFIG --libs`
-  AC_MSG_RESULT($FREETYPE_LIBS)
-fi
-AC_SUBST(FREETYPE_LIBS)
+PKG_CHECK_MODULES(FONTCONFIG, freetype2 >= freetype2_required_version,,
+                  [add_deps_error([freetype2_required_version >= freetype2_required_version])])
 
 PKG_CHECK_MODULES(HARFBUZZ, harfbuzz >= harfbuzz_required_version,,
                  [add_deps_error([harfbuzz >= harfbuzz_required_version])])