--- Makefile	2007-12-29 18:53:32.000000000 -0800
+++ Makefile-mod	2007-12-29 18:53:14.000000000 -0800
@@ -16,9 +16,9 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-CC = gcc
-CFLAGS = -O0 -Wall -Wwrite-strings -Wcast-qual -Wcast-align -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -Wnested-externs -Winline -pedantic -ansi -Wshadow -ggdb3 -W -Ignulib
-SHELL = /bin/bash
+CC?= gcc
+CFLAGS+= -Wall -Wwrite-strings -Wcast-qual -Wcast-align -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -Wnested-externs -Winline -pedantic -ansi -Wshadow -ggdb3 -W -Ignulib
+SHELL = /bin/sh
 VERSION ?= $(shell echo -n `cat VERSION | cut -d. -f1`. ; echo $$[`cat VERSION | cut -d. -f2` + 1])
 
 all:z80asm