--- fbida-2.08/GNUmakefile.orig	2011-06-01 09:31:59.000000000 +0200
+++ fbida-2.08/GNUmakefile	2011-06-05 08:53:44.957075434 +0200
@@ -42,16 +42,16 @@
 HAVE_NEW_EXIF	:= $(call ac_header,libexif/exif-log.h)
 HAVE_GLIBC	:= $(call ac_func,fopencookie)
 HAVE_STRCASESTR	:= $(call ac_func,strcasestr)
-HAVE_LIBPCD	:= $(call ac_lib,pcd_open,pcd)
-HAVE_LIBUNGIF	:= $(call ac_lib,DGifOpenFileName,ungif)
-HAVE_LIBPNG	:= $(call ac_lib,png_read_info,png,-lz)
-HAVE_LIBTIFF	:= $(call ac_lib,TIFFOpen,tiff)
-HAVE_LIBWEBP	:= $(call ac_lib,WebPDecodeRGBA,webp)
+HAVE_LIBPCD	?= $(call ac_lib,pcd_open,pcd)
+HAVE_LIBUNGIF	?= $(call ac_lib,DGifOpenFileName,ungif)
+HAVE_LIBPNG	?= $(call ac_lib,png_read_info,png,-lz)
+HAVE_LIBTIFF	?= $(call ac_lib,TIFFOpen,tiff)
+HAVE_LIBWEBP	?= $(call ac_lib,WebPDecodeRGBA,webp)
 #HAVE_LIBMAGICK	:= $(call ac_binary,Magick-config)
-HAVE_LIBSANE	:= $(call ac_lib,sane_init,sane)
-HAVE_LIBCURL	:= $(call ac_lib,curl_easy_init,curl)
-HAVE_LIBLIRC	:= $(call ac_lib,lirc_init,lirc_client)
-HAVE_MOTIF	:= $(call ac_lib,XmStringGenerate,Xm,-L/usr/X11R6/$(LIB) -lXpm -lXt -lXext -lX11)
+HAVE_LIBSANE	?= $(call ac_lib,sane_init,sane)
+HAVE_LIBCURL	?= $(call ac_lib,curl_easy_init,curl)
+HAVE_LIBLIRC	?= $(call ac_lib,lirc_init,lirc_client)
+HAVE_MOTIF	?= $(call ac_lib,XmStringGenerate,Xm,-L/usr/X11R6/$(LIB) -lXpm -lXt -lXext -lX11)
 JPEG_VER        := $(call ac_jpeg_ver)
 endef