--- zgv-5.9/config.mk.orig	2007-07-30 08:51:55.859285387 +0700

+++ zgv-5.9/config.mk	2007-07-30 08:52:44.113938239 +0700

@@ -7,8 +7,8 @@

 # Set the C compiler to use, and options for it.

 # This is likely to be what you'll want for most systems:

 #

-CC=gcc

-CFLAGS=-O2 -Wall -fomit-frame-pointer -finline-functions

+CC?=gcc

+CFLAGS?=-O2 -Wall -fomit-frame-pointer -finline-functions

 #

 # If you're brave enough to try compiling zgv on a non-x86 system :-),

 # this might be a better bet:

@@ -20,13 +20,13 @@

 # (This should be a `new' awk, such as gawk or mawk.) This setting

 # should work for Linux and *BSD.

 #

-AWK=awk

+AWK?=awk

 # Set display backend to use. svgalib is the `native' one and

 # is likely to remain preferable. The SDL backend is now quite

 # usable, but tends to be rather slower.

 #

-BACKEND=SVGALIB

+BACKEND?=SVGALIB

 #BACKEND=SDL

@@ -37,7 +37,7 @@

 # MANDIR to directory for man page.

 # Usually it will be simpler to just set PREFIX.

 #

-PREFIX=/usr/local

+PREFIX?=/usr/local

 # In theory it would be nice to put the info file and man page under

 # /usr/local/share. However, it's not clear if this is widely

@@ -59,7 +59,7 @@

 # Set the location/filename of the system-wide configuration file. You

 # may prefer to have this under /etc, for example.

 #

-RCFILE=$(PREFIX)/etc/zgv.conf

+RCFILE?=$(PREFIX)/etc/zgv.conf

 # Normally `make install' will update your `dir' file (in INFODIR),

@@ -91,7 +91,7 @@

 # colours will be recognised, which will mean many XPMs won't be

 # readable. This setting should be ok.

 #

-RGB_DB=/usr/X11R6/lib/X11/rgb.txt

+RGB_DB?=/usr/X11R6/lib/X11/rgb.txt

 # Finally, an option for `make dvi' in the `doc' directory. You only need

 # worry about what this is set to if you plan to make a printed manual.

@@ -102,4 +102,4 @@

 # edit this file when you do `make dvi', but that's only because

 # doc/Makefile isn't as smart about that as it should be. :-))

 #

-USE_A4_DEF=-t @afourpaper

+USE_A4_DEF?=-t @afourpaper