--- Makefile.orig	2007-09-19 22:02:17.000000000 +0400
+++ Makefile	2007-09-21 22:13:25.000000000 +0400
@@ -135,8 +135,8 @@
 
 # CFLAGS and LDFLAGS are for the users to override from the command line.
 
-CFLAGS = -g -O2 -Wall
-LDFLAGS =
+CFLAGS ?= -g -O2 -Wall
+LDFLAGS ?=
 ALL_CFLAGS = $(CFLAGS)
 ALL_LDFLAGS = $(LDFLAGS)
 STRIP ?= strip
@@ -173,15 +173,15 @@
 
 export prefix bindir gitexecdir sharedir template_dir sysconfdir
 
-CC = gcc
-AR = ar
-RM = rm -f
-TAR = tar
-FIND = find
-INSTALL = install
-RPMBUILD = rpmbuild
-TCL_PATH = tclsh
-TCLTK_PATH = wish
+CC ?= gcc
+AR ?= ar
+RM ?= rm -f
+TAR ?= tar
+FIND ?= find
+INSTALL ?= install
+RPMBUILD ?= rpmbuild
+TCL_PATH ?= tclsh
+TCLTK_PATH ?= wish
 
 export TCL_PATH TCLTK_PATH