But the part
@@ -172,9 +172,6 @@
AC_MSG_ERROR(gnustep-gui will not compile without tiff)
fi
-ADDITIONAL_INCLUDE_DIRS="ADDITIONAL_INCLUDE_DIRS $GRAPHIC_CFLAGS"
-ADDITIONAL_LIB_DIRS="ADDITIONAL_LIB_DIRS $GRAPHIC_LFLAGS"
is not the one I added recently, so I'm not completely sure we can
safely remove these two lines. IMO, they are redundant for checking
the audiofile stuff, but appear they were put there in order to
enable us to check the png stuff in a more elaborated way in future
when we need such a elaboration (e.g. detection of .a/.so/.h files
installed in non-standard locations).