--- fbida-2.01/GNUmakefile.orig	2004-06-30 15:41:54.000000000 +0200
+++ fbida-2.01/GNUmakefile	2004-10-25 21:01:59.674755768 +0200
@@ -35,15 +35,15 @@
 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_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_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)
 endef
 
 # transparent http/ftp access using curl depends on fopencookie (glibc)