fluxbox: fix build against imlib2

* fix configure.in to take care of the given imlib2-prefix
* disable imlib2 support if imlib2 is not part of the selection

[Peter: imlib2 needs to be built with X support]
Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/fluxbox/fluxbox-1.3.2-fix-configure.patch

@@ -0,0 +1,19 @@
+Avoid to call the imlib2-config that may be installed on the host system
+(even when --with-imlib2-prefix or --with-imlib2-exec-prefix is passed to
+the configure script), which totally screws up the resulting linker flags.
+
+Inspired by: http://git.fluxbox.org/fluxbox.git/commit/?id=b178bed60b5bd8b2c9ed0cbc67fd729ff3820589
+
+Signed-off-by: Samuel Martin <s.martin49@gmail.com>
+
+--- fluxbox-1.3.2.orig/configure.in	2012-10-21 16:11:59.445749396 +0200
++++ fluxbox-1.3.2/configure.in	2012-10-21 16:35:27.658390856 +0200
+@@ -443,8 +443,6 @@ if test x$enable_imlib2 = "xyes"; then
+       [
+          IMLIB2=true
+          AC_DEFINE(HAVE_IMLIB2, [], [Imlib2 support])
+-         IMLIB2_LIBS=`imlib2-config --libs`
+-         IMLIB2_CFLAGS=`imlib2-config --cflags`
+          LIBS="$LIBS $IMLIB2_LIBS"
+          CXXFLAGS="$CXXFLAGS $IMLIB2_CFLAGS"
+        ], [ AC_MSG_RESULT(no)]

package/fluxbox/fluxbox.mk

@@ -10,11 +10,19 @@ FLUXBOX_SITE = http://downloads.sourceforge.net/project/fluxbox/fluxbox/$(FLUXBO
 FLUXBOX_LICENSE = MIT
 FLUXBOX_LICENSE_FILES = COPYING
 
+FLUXBOX_AUTORECONF = YES
+
 FLUXBOX_CONF_OPT = --x-includes=$(STAGING_DIR)/usr/include/X11 \
 		   --x-libraries=$(STAGING_DIR)/usr/lib
-
 FLUXBOX_DEPENDENCIES = xlib_libX11 $(if $(BR2_PACKAGE_LIBICONV),libiconv)
 
+ifeq ($(BR2_PACKAGE_IMLIB2_X),y)
+FLUXBOX_CONF_OPT += --enable-imlib2 --with-imlib2-prefix=$(STAGING_DIR)/usr
+FLUXBOX_DEPENDENCIES += imlib2
+else
+FLUXBOX_CONF_OPT += --disable-imlib2
+endif
+
 define FLUXBOX_INSTALL_XSESSION_FILE
 	[ -f $(TARGET_DIR)/root/.xsession ] || $(INSTALL) -m 0755 -D \
 		package/fluxbox/xsession $(TARGET_DIR)/root/.xsession