[gnome-characters] Fix build failure due to missing symbols from pangoft2

[Daiki Ueno <dueno src gnome org>]

commit b0961775ab569efa58d277d983599586e6e4772b
Author: Tim Lunn <tim feathertop org>
Date:   Sun Apr 19 09:36:07 2015 +1000

    Fix build failure due to missing symbols from pangoft2
    
    https://bugzilla.gnome.org/show_bug.cgi?id=748124

 configure.ac    |   13 +++++++++++++
 lib/Makefile.am |    3 ++-
 lib/gc.c        |   44 ++++++++++++++++++++++----------------------
 3 files changed, 37 insertions(+), 23 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index d35ae08..727c2b7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -83,6 +83,19 @@ AC_SUBST(GLIB_COMPILE_RESOURCES)
 
 PKG_CHECK_MODULES([LIBGC], [gio-2.0 gtk+-3.0 pango])
 
+AC_ARG_ENABLE(pangoft2,
+    AS_HELP_STRING([--disable-pangoft2], [disable pangoft2 support]),,
+    enable_pangoft2=auto
+)
+
+AS_IF([test "$enable_pangoft2" = "yes"], [have_pangoft2=yes],
+      [test "$enable_pangoft2" = "auto"], PKG_CHECK_EXISTS([pangoft2], [have_pangoft2=yes]))
+
+AS_IF([test "$have_pangoft2" = "yes"], [
+    PKG_CHECK_MODULES([PANGOFT2], [pangoft2])
+    AC_DEFINE([HAVE_PANGOFT2],[1],[Define if you want to enable pangoft2 support])
+])
+
 AC_CONFIG_FILES([
   Makefile
   data/Makefile
diff --git a/lib/Makefile.am b/lib/Makefile.am
index 13e2f74..b8cbed8 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -7,11 +7,12 @@ AM_CPPFLAGS =                                 \
         -DG_LOG_DOMAIN=\"libgc\"               \
         -DG_DISABLE_DEPRECATED                 \
         $(LIBGC_CFLAGS)                                \
+        $(PANGOFT2_CFLAGS)                     \
         $(NULL)
 
 pkglib_LTLIBRARIES = libgc.la
 
-libgc_la_LIBADD = $(LIBGC_LIBS) $(LTLIBICONV) $(LTLIBUNISTRING) $(builddir)/../gllib/libgnu.la
+libgc_la_LIBADD = $(LIBGC_LIBS) $(LTLIBICONV) $(LTLIBUNISTRING) $(PANGOFT2_LIBS) 
$(builddir)/../gllib/libgnu.la
 libgc_la_LDFLAGS = -avoid-version
 libgc_la_sources = gc.h gc.c
 libgc_la_SOURCES = $(libgc_la_sources) confusables.h
diff --git a/lib/gc.c b/lib/gc.c
index b0ad00c..b883e12 100644
--- a/lib/gc.c
+++ b/lib/gc.c
@@ -805,36 +805,36 @@ gc_pango_context_font_has_glyph (PangoContext *context,
                                  PangoFont    *font,
                                  gunichar      uc)
 {
+#ifdef HAVE_PANGOFT2
   if (PANGO_IS_FC_FONT (font))
     /* Fast path when the font is loaded as PangoFcFont.  */
     {
       PangoFcFont *fcfont = PANGO_FC_FONT (font);
       return pango_fc_font_has_char (fcfont, uc);
     }
-  else
-    /* Slow path performing actual rendering.  */
+#endif
+
+  /* Slow path performing actual rendering.  */
+  PangoLayout *layout;
+  GError *error;
+  gchar *utf8;
+  glong items_written;
+  int retval;
+
+  utf8 = g_ucs4_to_utf8 (&uc, 1, NULL, &items_written, &error);
+  if (!utf8)
     {
-      PangoLayout *layout;
-      GError *error;
-      gchar *utf8;
-      glong items_written;
-      int retval;
-
-      utf8 = g_ucs4_to_utf8 (&uc, 1, NULL, &items_written, &error);
-      if (!utf8)
-       {
-         g_printerr ("error in decoding: %s\n", error->message);
-         g_error_free (error);
-       }
+      g_printerr ("error in decoding: %s\n", error->message);
+      g_error_free (error);
+    }
 
-      layout = pango_layout_new (context);
-      gc_pango_layout_disable_fallback (layout);
-      pango_layout_set_text (layout, utf8, items_written);
-      g_free (utf8);
+  layout = pango_layout_new (context);
+  gc_pango_layout_disable_fallback (layout);
+  pango_layout_set_text (layout, utf8, items_written);
+  g_free (utf8);
 
-      retval = pango_layout_get_unknown_glyphs_count (layout);
-      g_object_unref (layout);
+  retval = pango_layout_get_unknown_glyphs_count (layout);
+  g_object_unref (layout);
 
-      return retval == 0;
-    }
+  return retval == 0;
 }