--- Makefile.opts.in.orig	Tue Aug  7 19:55:49 2001
+++ Makefile.opts.in	Sun Aug 12 15:01:13 2001
@@ -200,6 +200,7 @@
 CFLAGS += -fnative-struct -D_OFF_T_ -D_off_t=long
 endif
 
+ifeq ($(MODIFY_CFLAGS),1)
 ifneq (,$(findstring bsd,$(SYS)))
 CFLAGS += -pthread
 endif
@@ -235,6 +236,7 @@
 endif
 
 #end of optimisations
+endif
 endif
 
 #
