--- a/Makefile
+++ b/Makefile
@@ -9,7 +9,7 @@
 
 ### enable ppm support ###
 DEFINES  += -D_HAVE_LIB_PPM_
-LIBS     += -lppm
+LIBS     += -lnetpbm
 
 ### enable PNG support ###
 DEFINES += -D_HAVE_PNG_
@@ -19,11 +19,11 @@
 DEFINES += -D_HAVE_ZLIB_
 LIBS    += -lz
 
-CC = gcc
+CC ?= gcc
 WARN     = -Wall -Wstrict-prototypes 
 COPT     = -g -O2  
 
-CFLAGS = $(COPT) $(WARN) $(DEFINES) $(INCLUDES) 
+CFLAGS += $(WARN) $(DEFINES) $(INCLUDES) 
 
 # list of all files that are part of the package
 PACKAGE_FILES = Makefile \
@@ -70,19 +70,19 @@
 # Target
 subtitle2pgm: subtitle2pgm.o spudec.o
 	@echo "Linking $@"
-	@$(CC) $(LIBS) $^ -o $@  
+	@$(CC) $^ -o $@ $(LDFLAGS) $(LIBS)
 
 subtitle2vobsub: subtitle2vobsub.o vobsub.o 
 	@echo "Linking $@"
-	@$(CC) $(LIBS) $^ -o $@  
+	@$(CC) $^ -o $@ $(LDFLAGS) $(LIBS)
 
 srttool: srttool.o
 	@echo "Linking $@"
-	@$(CC) $(LIBS) -g $^ -o $@  
+	@$(CC) -g $^ -o $@ $(LDFLAGS) $(LIBS)
 
 vobsub2pgm: vobsub2pgm.o vobsub.o spudec.o
 	@echo "Linking $@"
-	@$(CC) $(LIBS) -g $^ -o $@  
+	@$(CC) -g $^ -o $@ $(LDFLAGS) $(LIBS)
 
 .PHONY: clean dist rpm
 clean: