3 files changed, 6 insertions, 6 deletions
diff --git a/v4l2-apps/lib/libv4l/libv4l1/Makefile b/v4l2-apps/lib/libv4l/libv4l1/Makefile
index c92731daa..4efc74010 100644
--- a/v4l2-apps/lib/libv4l/libv4l1/Makefile
+++ b/v4l2-apps/lib/libv4l/libv4l1/Makefile
@@ -1,4 +1,4 @@
-CPPFLAGS      = -I../include -I../../../../linux/include
+override CPPFLAGS += -I../include -I../../../../linux/include
 
 CFLAGS := -g -O1
 CFLAGS += -Wall -W -Wno-unused -Wpointer-arith -Wstrict-prototypes
@@ -17,7 +17,7 @@ else
 V4L1_LIB      = libv4l1.so
 V4L1_OBJS    += ../libv4l2/libv4l2.so
 TARGETS      += $(V4L1COMPAT)
-CPPFLAGS     += -fPIC
+override CPPFLAGS += -fPIC
 endif
 
 ifeq ($(LIB_RELEASE),)
diff --git a/v4l2-apps/lib/libv4l/libv4l2/Makefile b/v4l2-apps/lib/libv4l/libv4l2/Makefile
index d8ac01c34..ff3cb9ddc 100644
--- a/v4l2-apps/lib/libv4l/libv4l2/Makefile
+++ b/v4l2-apps/lib/libv4l/libv4l2/Makefile
@@ -1,4 +1,4 @@
-CPPFLAGS      = -I../include -I../../../../linux/include
+override CPPFLAGS += -I../include -I../../../../linux/include
 
 CFLAGS := -g -O1
 CFLAGS += -Wall -W -Wno-unused -Wpointer-arith -Wstrict-prototypes
@@ -17,7 +17,7 @@ else
 V4L2_LIB      = libv4l2.so
 V4L2_OBJS    += ../libv4lconvert/libv4lconvert.so
 TARGETS      += $(V4L2CONVERT)
-CPPFLAGS     += -fPIC
+override CPPFLAGS += -fPIC
 endif
 
 ifeq ($(LIB_RELEASE),)
diff --git a/v4l2-apps/lib/libv4l/libv4lconvert/Makefile b/v4l2-apps/lib/libv4l/libv4lconvert/Makefile
index c2a5be942..b7aa58b11 100644
--- a/v4l2-apps/lib/libv4l/libv4lconvert/Makefile
+++ b/v4l2-apps/lib/libv4l/libv4lconvert/Makefile
@@ -1,4 +1,4 @@
-CPPFLAGS      = -I../include -I../../../../linux/include
+override CPPFLAGS += -I../include -I../../../../linux/include
 
 CFLAGS := -g -O1
 CFLAGS += -Wall -W -Wno-unused -Wpointer-arith -Wstrict-prototypes
@@ -7,7 +7,7 @@ ifeq ($(LINKTYPE),static)
 CONVERT_LIB   = libv4lconvert.a
 else
 CONVERT_LIB   = libv4lconvert.so
-CPPFLAGS     += -fPIC
+override CPPFLAGS += -fPIC
 endif
 
 CONVERT_OBJS  = libv4lconvert.o tinyjpeg.o sn9c10x.o pac207.o \