diff --git a/devLib/Makefile b/devLib/Makefile
index cf665d6..7c1a180 100644
--- a/devLib/Makefile
+++ b/devLib/Makefile
@@ -36,10 +36,10 @@ DYNAMIC=libwiringPiDev.so.$(VERSION)
 
 #DEBUG	= -g -O0
 DEBUG	= -O2
-CC	= gcc
+CC	?= gcc
 INCLUDE	= -I.
 DEFS	= -D_GNU_SOURCE
-CFLAGS	= $(DEBUG) $(DEFS) -Wformat=2 -Wall -Winline $(INCLUDE) -pipe -fPIC
+CFLAGS	= $(DEBUG) $(DEFS) -Wformat=2 -Wall -Winline $(INCLUDE) -pipe -fPIC $(EXTRA_CFLAGS)
 
 LIBS    =
 
diff --git a/examples/Gertboard/Makefile b/examples/Gertboard/Makefile
index 1939ad6..01a3cc3 100644
--- a/examples/Gertboard/Makefile
+++ b/examples/Gertboard/Makefile
@@ -11,9 +11,9 @@ endif
 
 #DEBUG	= -g -O0
 DEBUG	= -O3
-CC	= gcc
+CC	?= gcc
 INCLUDE	= -I/usr/local/include
-CFLAGS	= $(DEBUG) -Wall $(INCLUDE) -Winline -pipe
+CFLAGS	= $(DEBUG) -Wall $(INCLUDE) -Winline -pipe $(EXTRA_CFLAGS)
 
 LDFLAGS	= -L/usr/local/lib
 LDLIBS    = -lwiringPi -lwiringPiDev -lpthread -lm
diff --git a/examples/Makefile b/examples/Makefile
index 6d87885..5813ca0 100644
--- a/examples/Makefile
+++ b/examples/Makefile
@@ -28,9 +28,9 @@ endif
 
 #DEBUG	= -g -O0
 DEBUG	= -O3
-CC	= gcc
+CC	?= gcc
 INCLUDE	= -I/usr/local/include
-CFLAGS	= $(DEBUG) -Wall $(INCLUDE) -Winline -pipe
+CFLAGS	= $(DEBUG) -Wall $(INCLUDE) -Winline -pipe $(EXTRA_CFLAGS)
 
 LDFLAGS	= -L/usr/local/lib
 LDLIBS    = -lwiringPi -lwiringPiDev -lpthread -lm -lcrypt -lrt
diff --git a/examples/PiFace/Makefile b/examples/PiFace/Makefile
index f937c14..a5c7c72 100644
--- a/examples/PiFace/Makefile
+++ b/examples/PiFace/Makefile
@@ -28,9 +28,9 @@ endif
 
 #DEBUG	= -g -O0
 DEBUG	= -O3
-CC	= gcc
+CC	?= gcc
 INCLUDE	= -I/usr/local/include
-CFLAGS	= $(DEBUG) -Wall $(INCLUDE) -Winline -pipe
+CFLAGS	= $(DEBUG) -Wall $(INCLUDE) -Winline -pipe $(EXTRA_CFLAGS)
 
 LDFLAGS	= -L/usr/local/lib
 LDLIBS    = -lwiringPi -lwiringPiDev -lpthread -lm
diff --git a/examples/PiGlow/Makefile b/examples/PiGlow/Makefile
index f182db7..10b7bd7 100644
--- a/examples/PiGlow/Makefile
+++ b/examples/PiGlow/Makefile
@@ -28,9 +28,9 @@ endif
 
 #DEBUG	= -g -O0
 DEBUG	= -O3
-CC	= gcc
+CC	?= gcc
 INCLUDE	= -I/usr/local/include
-CFLAGS	= $(DEBUG) -Wall $(INCLUDE) -Winline -pipe
+CFLAGS	= $(DEBUG) -Wall $(INCLUDE) -Winline -pipe $(EXTRA_CFLAGS)
 
 LDFLAGS	= -L/usr/local/lib
 LDLIBS    = -lwiringPi -lwiringPiDev -lpthread -lm
diff --git a/examples/q2w/Makefile b/examples/q2w/Makefile
index 8f773bf..7dc0e55 100644
--- a/examples/q2w/Makefile
+++ b/examples/q2w/Makefile
@@ -28,9 +28,9 @@ endif
 
 #DEBUG	= -g -O0
 DEBUG	= -O3
-CC	= gcc
+CC	?= gcc
 INCLUDE	= -I/usr/local/include
-CFLAGS	= $(DEBUG) -Wall $(INCLUDE) -Winline -pipe
+CFLAGS	= $(DEBUG) -Wall $(INCLUDE) -Winline -pipe $(EXTRA_CFLAGS)
 
 LDFLAGS	= -L/usr/local/lib
 LDLIBS    = -lwiringPi -lwiringPiDev -lpthread -lm
diff --git a/examples/scrollPhat/Makefile b/examples/scrollPhat/Makefile
index 2471f69..ac384d8 100644
--- a/examples/scrollPhat/Makefile
+++ b/examples/scrollPhat/Makefile
@@ -28,9 +28,9 @@ endif
 
 #DEBUG	= -g -O0
 DEBUG	= -O3
-CC	= gcc
+CC	?= gcc
 INCLUDE	= -I/usr/local/include
-CFLAGS	= $(DEBUG) -Wall $(INCLUDE) -Winline -pipe
+CFLAGS	= $(DEBUG) -Wall $(INCLUDE) -Winline -pipe $(EXTRA_CFLAGS)
 
 LDFLAGS	= -L/usr/local/lib
 LDLIBS    = -lwiringPi -lwiringPiDev -lpthread -lm
diff --git a/gpio/Makefile b/gpio/Makefile
index 9ec160d..c0ed359 100644
--- a/gpio/Makefile
+++ b/gpio/Makefile
@@ -32,9 +32,9 @@ endif
 
 #DEBUG	= -g -O0
 DEBUG	= -O2
-CC	= gcc
+CC	?= gcc
 INCLUDE	= -I$(DESTDIR)$(PREFIX)/include
-CFLAGS	= $(DEBUG) -Wall -Wextra $(INCLUDE) -Winline -pipe
+CFLAGS	= $(DEBUG) -Wall -Wextra $(INCLUDE) -Winline -pipe $(EXTRA_CFLAGS)
 
 LDFLAGS	= -L$(DESTDIR)$(PREFIX)/lib
 LIBS    = -lwiringPi -lwiringPiDev -lpthread -lrt -lm -lcrypt
diff --git a/wiringPi/Makefile b/wiringPi/Makefile
index 287fa58..e778f7f 100644
--- a/wiringPi/Makefile
+++ b/wiringPi/Makefile
@@ -36,10 +36,10 @@ DYNAMIC=libwiringPi.so.$(VERSION)
 
 #DEBUG	= -g -O0
 DEBUG	= -O2
-CC	= gcc
+CC	?= gcc
 INCLUDE	= -I.
 DEFS	= -D_GNU_SOURCE
-CFLAGS	= $(DEBUG) $(DEFS) -Wformat=2 -Wall -Wextra -Winline $(INCLUDE) -pipe -fPIC
+CFLAGS	= $(DEBUG) $(DEFS) -Wformat=2 -Wall -Wextra -Winline $(INCLUDE) -pipe -fPIC $(EXTRA_CFLAGS)
 #CFLAGS	= $(DEBUG) $(DEFS) -Wformat=2 -Wall -Wextra -Wconversion -Winline $(INCLUDE) -pipe -fPIC
 
 LIBS    = -lm -lpthread -lrt -lcrypt
diff --git a/wiringPiD/Makefile b/wiringPiD/Makefile
index 6b2cc9e..6e1068b 100644
--- a/wiringPiD/Makefile
+++ b/wiringPiD/Makefile
@@ -31,9 +31,9 @@ endif
 
 #DEBUG	= -g -O0
 DEBUG	= -O2
-CC	= gcc
+CC	?= gcc
 INCLUDE	= -I$(DESTDIR)$(PREFIX)/include
-CFLAGS	= $(DEBUG) -Wall -Wextra $(INCLUDE) -Winline -pipe
+CFLAGS	= $(DEBUG) -Wall -Wextra $(INCLUDE) -Winline -pipe $(EXTRA_CFLAGS)
 
 LDFLAGS	= -L$(DESTDIR)$(PREFIX)/lib
 LIBS    = -lwiringPi -lwiringPiDev -lpthread -lrt -lm -lcrypt