--- ../Make.rules.orig	2010-08-26 17:19:37.000000000 +0200
+++ ../Make.rules	2010-11-04 20:26:22.000000000 +0100
@@ -7,8 +7,8 @@ CFLAGS += -Wall -Wpointer-arith
 CXXFLAGS := $(CFLAGS)
 CFLAGS += -Wstrict-prototypes -Wmissing-prototypes
 
-PREFIX = /usr/local
-LIBDIR = $(PREFIX)/lib
+PREFIX ?= /usr/local
+LIBDIR ?= $(PREFIX)/lib
 # subdir below LIBDIR in which to install the libv4lx libc wrappers
 LIBSUBDIR = libv4l
 
@@ -22,10 +22,10 @@ LIB_RELEASE = 0
 # And last various rules
 
 %.o: %.c
-	$(CC) -Wp,-MMD,"$*.d",-MQ,"$@",-MP -c $(CPPFLAGS) $(CFLAGS) -o $@ $<
+	$(CC) -MMD -MF "$*.d" -MQ "$@" -MP -c $(CPPFLAGS) $(CFLAGS) -o $@ $<
 
 %.o: %.cpp
-	$(CXX) -Wp,-MMD,"$*.d",-MQ,"$@",-MP -c $(CPPFLAGS) $(CXXFLAGS) -o $@ $<
+	$(CXX) -MMD -MF "$*.d" -MQ "$@" -MP -c $(CPPFLAGS) $(CXXFLAGS) -o $@ $<
 
 %.so:
 	$(CC) -shared $(LDFLAGS) -Wl,-soname,$@.$(LIB_RELEASE) -o $@.$(LIB_RELEASE) $^ $(LIBS_$*)