diff --git a/Makefile b/Makefile
index a10cb89..752a112 100644
--- a/Makefile
+++ b/Makefile
@@ -5,12 +5,11 @@ LDFLAGS +=
 
 ###################################
 # Where to install
-INSTALL_PREFIX	= $(DESTDIR)/usr/local
+PREFIX         = /usr
+LIBDIR         = $(PREFIX)/lib
 
 ###################################
 # Where to find libraries, and their header files.
-LIBPATHS	= -L/usr/local/lib
-INCLUDE		= -I/usr/local/include
 ifdef FFTW_PATH
 LIBPATHS	+= -L$(FFTW_PATH)/lib
 INCLUDE		+= -I$(FFTW_PATH)/include
@@ -22,19 +21,15 @@ FFTW_LIB	= -lfftw3 -lfftw3f
 
 ###################################
 # Binaries
-FLEX	= flex
-LD	= gcc
-CC	= gcc
-CHMOD	= chmod
+FLEX	?= flex
+CC	?= gcc
+CHMOD	?= chmod
 
 ###################################
 # Flags
-CC_WARN		= -Wall -Wpointer-arith -Wshadow \
+CFLAGS		+= -Wall -Wpointer-arith -Wshadow \
 -Wcast-align -Wwrite-strings -Wstrict-prototypes \
 -Wmissing-prototypes -Wmissing-declarations -Wnested-externs
-CC_FLAGS	= $(DEFINE) -O2 $(CFLAGS) $(CPPFLAGS)
-CC_FPIC		= -fPIC
-LD_SHARED	= -shared
 CHMOD_REMOVEX	= -x
 
 ###################################
@@ -85,7 +80,7 @@ ifneq (,$(findstring sparc,$(UNAME_M)))
 CC_FLAGS += -Wa,-xarch=v8plus
 endif
 BRUTEFIR_LIBS	+= -ldl
-LDMULTIPLEDEFS	= -Xlinker --allow-multiple-definition
+LINKFLAGS      = -fPIC -shared -Xlinker --allow-multiple-definition
 # assume that we have oss and jack, alsa being linux-only
 ifeq ($(UNAME),Linux)
 LIB_TARGETS	+= alsa.bfio
@@ -111,49 +106,50 @@ TARGETS		= $(BIN_TARGETS) $(LIB_TARGETS)
 all: $(TARGETS)
 
 %.fpic.o: %.c
-	$(CC) -o $@			-c $(LDFLAGS) $(INCLUDE) $(CC_FPIC) $(CC_WARN) $(CC_FLAGS) $<
+	$(CC) -fPIC -shared -o $@       -c $(INCLUDE) $(CFLAGS) $<
 
 %.o: %.c
-	$(CC) -o $@			-c $(LDFLAGS) $(INCLUDE) $(CC_WARN) $(CC_FLAGS) $<
+	$(CC) -o $@                     -c $(INCLUDE) $(CFLAGS) $<
 
 # special rule to avoid to get warnings from code generated by flex
 bfconf_lexical.o: bfconf_lexical.c
-	$(CC) -o $@			-c $(LDFLAGS) $(INCLUDE) $(CC_FLAGS) $<
+	$(CC) -o $@                     -c $(INCLUDE) $(CFLAGS) $<
 
 %.c: %.lex
 	$(FLEX) -o$@ $<
 
 brutefir: $(BRUTEFIR_OBJS)
-	$(CC) $(LDFLAGS) $(LIBPATHS) $(LDMULTIPLEDEFS) -o $@ $(BRUTEFIR_OBJS) $(BRUTEFIR_LIBS)
+	$(CC) $(LDFLAGS) $(LDMULTIPLEDEFS) $(CFLAGS) $(LIBPATHS) -o $@ $(BRUTEFIR_OBJS) $(BRUTEFIR_LIBS)
 
 alsa.bfio: $(BFIO_ALSA_OBJS)
-	$(LD) $(LD_SHARED) $(LDFLAGS) $(CC_FPIC) $(LIBPATHS) -o $@ $(BFIO_ALSA_OBJS) $(BFIO_ALSA_LIBS) -lc
+	$(CC) $(LINKFLAGS) $(LDFLAGS) $(CFLAGS) $(LIBPATHS) -o $@ $(BFIO_ALSA_OBJS) $(BFIO_ALSA_LIBS) -lc
 	$(CHMOD) $(CHMOD_REMOVEX) $@
 
 oss.bfio: $(BFIO_OSS_OBJS)
-	$(LD) $(LD_SHARED) $(LDFLAGS) $(CC_FPIC) $(LIBPATHS) -o $@ $(BFIO_OSS_OBJS) -lc
+	$(CC) $(LINKFLAGS) $(LDFLAGS) $(CFLAGS) $(LIBPATHS) -o $@ $(BFIO_OSS_OBJS) -lc
 	$(CHMOD) $(CHMOD_REMOVEX) $@
 
 jack.bfio: $(BFIO_JACK_OBJS)
-	$(LD) $(LD_SHARED) $(LDFLAGS) $(CC_FPIC) $(LIBPATHS) -o $@ $(BFIO_JACK_OBJS) $(BFIO_JACK_LIBS) -lc
+	$(CC) $(LINKFLAGS) $(LDFLAGS) $(CFLAGS) $(LIBPATHS) -o $@ $(BFIO_JACK_OBJS) $(BFIO_JACK_LIBS) -lc
 	$(CHMOD) $(CHMOD_REMOVEX) $@
 
 file.bfio: $(BFIO_FILE_OBJS)
-	$(LD) $(LD_SHARED) $(LDFLAGS) $(CC_FPIC) $(LIBPATHS) -o $@ $(BFIO_FILE_OBJS) -lc
+	$(CC) $(LINKFLAGS) $(LDFLAGS) $(CFLAGS) $(LIBPATHS) -o $@ $(BFIO_FILE_OBJS) -lc
 	$(CHMOD) $(CHMOD_REMOVEX) $@
 
 cli.bflogic: $(BFLOGIC_CLI_OBJS)
-	$(LD) $(LD_SHARED) $(LDFLAGS) $(CC_FPIC) $(LIBPATHS) -o $@ $(BFLOGIC_CLI_OBJS) -lc
+	$(CC) $(LINKFLAGS) $(LDFLAGS) $(CFLAGS) $(LIBPATHS) -o $@ $(BFLOGIC_CLI_OBJS) -lc
 	$(CHMOD) $(CHMOD_REMOVEX) $@
 
 eq.bflogic: $(BFLOGIC_EQ_OBJS)
-	$(LD) $(LD_SHARED) $(LDFLAGS) $(CC_FPIC) $(LIBPATHS) -o $@ $(BFLOGIC_EQ_OBJS) -lc
+	$(CC) $(LINKFLAGS) $(LDFLAGS) $(CFLAGS) $(LIBPATHS) -o $@ $(BFLOGIC_EQ_OBJS) -lc
 	$(CHMOD) $(CHMOD_REMOVEX) $@
 
 install: $(BIN_TARGETS) $(LIB_TARGETS)
-	install -d $(INSTALL_PREFIX)/bin $(INSTALL_PREFIX)/lib/brutefir
-	install $(BIN_TARGETS) $(INSTALL_PREFIX)/bin
-	install $(LIB_TARGETS) $(INSTALL_PREFIX)/lib/brutefir
+	install -d $(DESTDIR)$(PREFIX)/bin
+	install $(BIN_TARGETS) $(DESTDIR)$(PREFIX)/bin
+	install -d $(DESTDIR)$(LIBDIR)/brutefir
+	install $(LIB_TARGETS) $(DESTDIR)$(LIBDIR)/brutefir
 
 clean:
 	rm -f *.core core bfconf_lexical.c $(BRUTEFIR_OBJS) $(BFIO_FILE_OBJS)  \