[gtk+] Explicitly link gdk and gtk against libm

[Matthias Clasen <matthiasc src gnome org>]

commit f060343a821ee58ee8e4cf35ec5578a97b1fb64d
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Aug 28 20:02:16 2011 -0400

    Explicitly link gdk and gtk against libm
    
    We used to get an implicit -lm from gdk-pixbuf, but that has
    recently been changed to not inject extraneous libraries into
    link lines, so we have to do it ourselves now. This is more
    correct, anyway.

 configure.ac |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 16f065e..3e973d7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1263,7 +1263,7 @@ LDFLAGS="$saved_ldflags"
 
 GDK_PACKAGES="$PANGO_PACKAGES $GIO_PACKAGE $X_PACKAGES $WAYLAND_PACKAGES gdk-pixbuf-2.0 $cairo_backends cairo-gobject"
 
-GDK_DEP_LIBS="$GDK_EXTRA_LIBS `$PKG_CONFIG --libs $GDK_PACKAGES`"
+GDK_DEP_LIBS="$GDK_EXTRA_LIBS `$PKG_CONFIG --libs $GDK_PACKAGES` $MATH_LIB"
 GDK_DEP_CFLAGS="`$PKG_CONFIG --cflags  gthread-2.0 $GDK_PACKAGES` $GDK_EXTRA_CFLAGS"
 #
 # If we aren't writing explicit dependencies, then don't put the extra libraries we need
@@ -1320,7 +1320,7 @@ if test x"$os_openbsd" = xyes; then
 fi
 
 GTK_EXTRA_CFLAGS=
-GTK_DEP_LIBS="$GDK_EXTRA_LIBS $GTK_DEP_LIBS_FOR_X `$PKG_CONFIG --libs $PANGO_PACKAGES $GTK_PACKAGES_FOR_X $GTK_PACKAGES` $GTK_EXTRA_LIBS"
+GTK_DEP_LIBS="$GDK_EXTRA_LIBS $GTK_DEP_LIBS_FOR_X `$PKG_CONFIG --libs $PANGO_PACKAGES $GTK_PACKAGES_FOR_X $GTK_PACKAGES` $GTK_EXTRA_LIBS $MATH_LIB"
 GTK_DEP_CFLAGS="`$PKG_CONFIG --cflags  gthread-2.0 $GDK_PACKAGES $GTK_PACKAGES` $GDK_EXTRA_CFLAGS $GTK_EXTRA_CFLAGS"
 
 if test x"$os_win32" = xyes; then