diff -ur bacisrc.orig/interp/Makefile bacisrc/interp/Makefile
--- bacisrc.orig/interp/Makefile	2003-05-14 19:30:19.000000000 +0200
+++ bacisrc/interp/Makefile	2004-08-10 21:46:57.959481592 +0200
@@ -33,7 +33,7 @@
 Linuxgui:
 	make "DEFINES=-DLinux -DTCL" "LLIBS=-ltk -ltcl -lX11 -ldl -lm" \
       "INCDIRS=-I$(INCDIR)" \
-      "LDFLAGS= -L/usr/lib -L/usr/local/lib -L/usr/X11R6/lib" \
+      "LDFLAGS= -L/usr/lib64 -L/usr/local/lib64 -L/usr/X11R6/lib64" \
       guibainterp
 
 SunOSgui: