diff --git a/Makefile b/Makefile
index d999733692..c737ace3b4 100644
--- a/Makefile
+++ b/Makefile
@@ -139,23 +139,15 @@ install-vhook:
 
 install-libs:
 	install -d $(libdir)
+	$(MAKE) -C libavutil   install-libs
+	$(MAKE) -C libavcodec  install-libs
+	$(MAKE) -C libavformat install-libs
+ifeq ($(CONFIG_PP),yes)
+	$(MAKE) -C libavcodec/libpostproc install-libs
+endif
 ifeq ($(BUILD_SHARED),yes)
-	$(MAKE) -C libavutil   install-lib-shared
-	$(MAKE) -C libavcodec  install-lib-shared
-	$(MAKE) -C libavformat install-lib-shared
-ifeq ($(CONFIG_PP),yes)
-	$(MAKE) -C libavcodec/libpostproc install-lib-shared
-endif
 	$(LDCONFIG) || true
 endif
-ifeq ($(BUILD_STATIC),yes)
-	$(MAKE) -C libavutil   install-lib-static
-	$(MAKE) -C libavcodec  install-lib-static
-	$(MAKE) -C libavformat install-lib-static
-ifeq ($(CONFIG_PP),yes)
-	$(MAKE) -C libavcodec/libpostproc install-lib-static
-endif
-endif
 
 install-headers:
 	install -d "$(incdir)"
diff --git a/common.mak b/common.mak
new file mode 100644
index 0000000000..4bc8b118b5
--- /dev/null
+++ b/common.mak
@@ -0,0 +1,97 @@
+#
+# common bits used by all libraries
+#
+
+SRC_DIR = $(SRC_PATH)/$(SUBDIR)
+VPATH = $(SRC_DIR)
+
+#FIXME: This should be in configure/config.mak
+ifeq ($(CONFIG_WIN32),yes)
+LDFLAGS = -Wl,--output-def,$(@:.dll=.def),--out-implib,lib$(SLIBNAME:$(SLIBSUF)=.dll.a)
+endif
+
+ifeq ($(TARGET_GPROF),yes)
+CFLAGS+=-p
+LDFLAGS+=-p
+endif
+
+ifeq ($(TARGET_ARCH_SPARC64),yes)
+CFLAGS+= -mcpu=ultrasparc -mtune=ultrasparc
+endif
+
+SRCS = $(OBJS:.o=.c) $(ASM_OBJS:.o=.S) $(CPPOBJS:.o=.cpp)
+OBJS := $(OBJS) $(ASM_OBJS) $(CPPOBJS)
+STATIC_OBJS := $(OBJS) $(STATIC_OBJS)
+SHARED_OBJS := $(OBJS) $(SHARED_OBJS)
+
+all: $(LIB) $(SLIBNAME)
+
+$(LIB): $(STATIC_OBJS)
+	rm -f $@
+	$(AR) rc $@ $^ $(EXTRAOBJS)
+	$(RANLIB) $@
+
+$(SLIBNAME): $(SHARED_OBJS)
+	$(CC) $(SHFLAGS) $(LDFLAGS) -o $@ $^ $(EXTRALIBS) $(EXTRAOBJS)
+ifeq ($(CONFIG_WIN32),yes)
+	-lib /machine:i386 /def:$(@:.dll=.def)
+endif
+
+%.o: %.c
+	$(CC) $(CFLAGS) $(LIBOBJFLAGS) -c -o $@ $<
+
+%.o: %.S
+	$(CC) $(CFLAGS) $(LIBOBJFLAGS) -c -o $@ $<
+
+# BeOS: remove -Wall to get rid of all the "multibyte constant" warnings
+%.o: %.cpp
+	g++ $(subst -Wall,,$(CFLAGS)) -c -o $@ $<
+
+depend: $(SRCS)
+	$(CC) -MM $(CFLAGS) $^ 1>.depend
+
+dep:	depend
+
+clean::
+	rm -f *.o *.d *~ *.a *.lib *.so *.dylib *.dll \
+	      *.lib *.def *.dll.a *.exp
+
+distclean: clean
+	rm -f .depend
+
+ifeq ($(BUILD_SHARED),yes)
+INSTLIBTARGETS += install-lib-shared
+endif
+ifeq ($(BUILD_STATIC),yes)
+INSTLIBTARGETS += install-lib-static
+endif
+
+install: install-libs install-headers
+
+install-libs: $(INSTLIBTARGETS)
+
+install-lib-shared: $(SLIBNAME)
+ifeq ($(CONFIG_WIN32),yes)
+	install $(INSTALLSTRIP) -m 755 $(SLIBNAME) "$(prefix)"
+else
+	install $(INSTALLSTRIP) -m 755 $(SLIBNAME) \
+		$(libdir)/$(SLIBNAME_WITH_VERSION)
+	ln -sf $(SLIBNAME_WITH_VERSION) \
+		$(libdir)/$(SLIBNAME_WITH_MAJOR)
+	ln -sf $(SLIBNAME_WITH_VERSION) \
+		$(libdir)/$(SLIBNAME)
+endif
+
+install-lib-static: $(LIB)
+	install -m 644 $(LIB) "$(libdir)"
+
+install-headers:
+	install -m 644 $(addprefix "$(SRC_DIR)"/,$(HEADERS)) "$(incdir)"
+	install -m 644 $(BUILD_ROOT)/lib$(NAME).pc "$(libdir)/pkgconfig"
+
+#
+# include dependency files if they exist
+#
+ifneq ($(wildcard .depend),)
+include .depend
+endif
diff --git a/configure b/configure
index ba5c11f1e9..84b72bcd63 100755
--- a/configure
+++ b/configure
@@ -1892,6 +1892,7 @@ if test "$source_path_used" = "yes" ; then
     done
 fi
 echo "SRC_PATH=$source_path" >> config.mak
+echo "BUILD_ROOT=$PWD" >> config.mak
 
 if test "$amr_wb" = "yes" ; then
   echo "#define AMR_WB 1" >> $TMPH
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 3b646a280e..2ce233dffc 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -4,16 +4,9 @@
 #
 include ../config.mak
 
-VPATH=$(SRC_PATH)/libavcodec
-
 # NOTE: -I.. is needed to include config.h
 CFLAGS=$(OPTFLAGS) -DHAVE_AV_CONFIG_H -I.. -I$(SRC_PATH)/libavutil -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_GNU_SOURCE $(AMR_CFLAGS)
 
-#FIXME: This should be in configure/config.mak
-ifeq ($(CONFIG_WIN32),yes)
-    LDFLAGS=-Wl,--output-def,$(@:.dll=.def),--out-implib,lib$(SLIBNAME:$(SLIBSUF)=.dll.a)
-endif
-
 OBJS= bitstream.o utils.o mem.o allcodecs.o \
       mpegvideo.o jrevdct.o jfdctfst.o jfdctint.o\
       mpegaudio.o ac3enc.o mjpeg.o resample.o resample2.o dsputil.o \
@@ -25,6 +18,8 @@ OBJS= bitstream.o utils.o mem.o allcodecs.o \
       vp3dsp.o h264idct.o rangecoder.o pnm.o h263.o msmpeg4.o h263dec.o \
       opt.o
 
+HEADERS = avcodec.h dsputil.h
+
 ifeq ($(CONFIG_AASC_DECODER),yes)
     OBJS+= aasc.o
 endif
@@ -326,11 +321,6 @@ ifeq ($(CONFIG_LIBGSM),yes)
 OBJS += libgsm.o
 endif
 
-ifeq ($(TARGET_GPROF),yes)
-CFLAGS+=-p
-LDFLAGS+=-p
-endif
-
 # i386 mmx specific stuff
 ifeq ($(TARGET_MMX),yes)
 OBJS += i386/fdct_mmx.o i386/cputest.o \
@@ -400,14 +390,9 @@ OBJS+=sparc/dsputil_vis.o
 sparc/%.o: sparc/%.c
 	$(CC) -mcpu=ultrasparc -mtune=ultrasparc $(CFLAGS) -c -o $@ $<
 endif
-ifeq ($(TARGET_ARCH_SPARC64),yes)
-CFLAGS+= -mcpu=ultrasparc -mtune=ultrasparc
-endif
-
-SRCS := $(OBJS:.o=.c) $(ASM_OBJS:.o=.S)
-OBJS := $(OBJS) $(ASM_OBJS)
 
 NAME=avcodec
+SUBDIR=libavcodec
 LIBAVUTIL= $(SRC_PATH)/libavutil/$(LIBPREF)avutil$(LIBSUF)
 ifeq ($(BUILD_SHARED),yes)
 LIBVERSION=$(LAVCVERSION)
@@ -415,40 +400,21 @@ LIBMAJOR=$(LAVCMAJOR)
 endif
 TESTS= imgresample-test dct-test motion-test fft-test
 
-all: $(LIB) $(SLIBNAME)
+EXTRAOBJS = $(AMREXTRALIBS)
+
+include $(SRC_PATH)/common.mak
+
+$(LIB): $(AMRLIBS)
 
 amrlibs:
 	$(MAKE) -C amr spclib fipoplib
 
 tests: apiexample cpuid_test $(TESTS)
 
-$(LIB): $(OBJS) $(AMRLIBS)
-	rm -f $@
-	$(AR) rc $@ $(OBJS) $(AMREXTRALIBS)
-	$(RANLIB) $@
-
-$(SLIBNAME): $(OBJS)
-	$(CC) $(SHFLAGS) $(LDFLAGS) -o $@ $(OBJS) $(EXTRALIBS) $(AMREXTRALIBS)
-ifeq ($(CONFIG_WIN32),yes)
-	-lib /machine:i386 /def:$(@:.dll=.def)
-endif
-
 dsputil.o: dsputil.c dsputil.h
 
-%.o: %.c
-	$(CC) $(CFLAGS) $(LIBOBJFLAGS) -c -o $@ $<
-
-%.o: %.S
-	$(CC) $(CFLAGS) $(LIBOBJFLAGS) -c -o $@ $<
-
-depend: $(SRCS)
-	$(CC) -MM $(CFLAGS) $^ 1>.depend
-
-dep:	depend
-
-clean: $(CLEANAMR)
-	rm -f *.o *.d *~ *.a *.lib *.so *.dylib *.dll \
-	   *.dll.a *.def *.exp \
+clean:: $(CLEANAMR)
+	rm -f \
 	   i386/*.o i386/*~ \
 	   armv4l/*.o armv4l/*~ \
 	   mlib/*.o mlib/*~ \
@@ -460,9 +426,6 @@ clean: $(CLEANAMR)
 	   liba52/*.o liba52/*~ \
 	   apiexample $(TESTS)
 
-distclean: clean
-	rm -f .depend
-
 cleanamr:
 	$(MAKE) -C amr clean
 
@@ -493,30 +456,3 @@ motion-test: motion_test.o $(LIB)
 
 fft-test: fft-test.o $(LIB)
 	$(CC) -o $@ $^ $(LIBAVUTIL) -lm
-
-
-install-lib-shared: $(SLIBNAME)
-ifeq ($(CONFIG_WIN32),yes)
-	install $(INSTALLSTRIP) -m 755 $(SLIBNAME) "$(prefix)"
-else
-	install $(INSTALLSTRIP) -m 755 $(SLIBNAME) \
-		$(libdir)/$(SLIBNAME_WITH_VERSION)
-	ln -sf $(SLIBNAME_WITH_VERSION) \
-		$(libdir)/$(SLIBNAME_WITH_MAJOR)
-	ln -sf $(SLIBNAME_WITH_VERSION) \
-		$(libdir)/$(SLIBNAME)
-endif
-
-install-lib-static: $(LIB)
-	install -m 644 $(LIB) "$(libdir)"
-
-install-headers:
-	install -m 644 avcodec.h dsputil.h "$(incdir)"
-	install -m 644 $(SRC_PATH)/libavcodec.pc "$(libdir)/pkgconfig"
-
-#
-# include dependency files if they exist
-#
-ifneq ($(wildcard .depend),)
-include .depend
-endif
diff --git a/libavcodec/libpostproc/Makefile b/libavcodec/libpostproc/Makefile
index e34ac73c40..00e4033cea 100644
--- a/libavcodec/libpostproc/Makefile
+++ b/libavcodec/libpostproc/Makefile
@@ -1,81 +1,28 @@
 
 include ../../config.mak
 
-VPATH=$(SRC_PATH)/libavcodec/libpostproc
-
 # Overload incdir, postproc include files go in a different directory.
 incdir=$(prefix)/include/postproc
 
 NAME=postproc
+SUBDIR=libavcodec/libpostproc
 ifeq ($(BUILD_SHARED),yes)
 LIBVERSION=$(SPPVERSION)
 LIBMAJOR=$(SPPMAJOR)
 endif
 
-OBJS=postprocess.o
-SOBJS=postprocess_pic.o
+STATIC_OBJS=postprocess.o
+SHARED_OBJS=postprocess_pic.o
 
-CFLAGS  = $(OPTFLAGS) $(MLIB_INC) -I. -I.. $(EXTRA_INC)
+HEADERS = postprocess.h
+
+CFLAGS  = $(OPTFLAGS) $(MLIB_INC) -I. -I.. -I$(SRC_PATH)/libavcodec -I../.. $(EXTRA_INC)
 # -I/usr/X11R6/include/
 
-.SUFFIXES: .c .o
-
-# .PHONY: all clean
-
-.c.o:
-	$(CC) -c $(CFLAGS) $(LIBOBJFLAGS) -I$(SRC_PATH)/libavcodec -I../.. -o $@ $<
-
-all:    $(SWSLIB) $(LIB) $(SLIBNAME)
-
-clean:
-	rm -f *.o *.d *~ *.a *.lib *.so *.dylib *.dll
-
-distclean: clean
-	rm -f .depend
-
-dep:    depend
-
-depend:
-	$(CC) -MM $(CFLAGS) postprocess.c 1>.depend
+include $(SRC_PATH)/common.mak
 
 ifeq ($(BUILD_SHARED),yes)
 postprocess_pic.o: postprocess.c
 	$(CC) -c $(CFLAGS) -fomit-frame-pointer -fPIC -DPIC -I.. -I../.. -o $@ $<
-
-$(SLIBNAME): $(SOBJS)
-	$(CC) $(SHFLAGS) -o $(SLIBNAME) $(SOBJS)
 endif
 
-$(LIB): $(OBJS)
-	rm -f $@
-	$(AR) rc $@ $(OBJS)
-	$(RANLIB) $@
-
-
-install-lib-shared: $(SLIBNAME)
-ifeq ($(CONFIG_WIN32),yes)
-	install $(INSTALLSTRIP) -m 755 $(SLIBNAME) "$(prefix)"
-else
-	install $(INSTALLSTRIP) -m 755 $(SLIBNAME) \
-		$(libdir)/$(SLIBNAME_WITH_VERSION)
-	ln -sf $(SLIBNAME_WITH_VERSION) \
-		$(libdir)/$(SLIBNAME_WITH_MAJOR)
-	ln -sf $(SLIBNAME_WITH_VERSION) \
-		$(libdir)/$(SLIBNAME)
-endif
-
-install-lib-static: $(LIB)
-	install -m 644 $(LIB) "$(libdir)"
-
-install-headers:
-	install -d "$(incdir)"
-	install -m 644 postprocess.h "$(incdir)/postprocess.h"
-	install -m 644 $(SRC_PATH)/libpostproc.pc "$(libdir)/pkgconfig"
-
-
-#
-# include dependency files if they exist
-#
-ifneq ($(wildcard .depend),)
-include .depend
-endif
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 381b04642a..27079df9ca 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -4,17 +4,12 @@
 #
 include ../config.mak
 
-VPATH=$(SRC_PATH)/libavformat
-
 CFLAGS=$(OPTFLAGS) -I.. -I$(SRC_PATH) -I$(SRC_PATH)/libavutil -I$(SRC_PATH)/libavcodec -DHAVE_AV_CONFIG_H -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_GNU_SOURCE
 
-#FIXME: This should be in configure/config.mak
-ifeq ($(CONFIG_WIN32),yes)
-    LDFLAGS=-Wl,--output-def,$(@:.dll=.def),--out-implib,lib$(SLIBNAME:$(SLIBSUF)=.dll.a)
-endif
-
 OBJS= utils.o cutils.o os_support.o allformats.o
-PPOBJS=
+CPPOBJS=
+
+HEADERS = avformat.h avio.h rtp.h rtsp.h rtspcodes.h
 
 # demuxers
 OBJS+=mpeg.o mpegts.o mpegtsenc.o ffm.o crc.o img.o img2.o raw.o rm.o \
@@ -71,10 +66,10 @@ ifeq ($(CONFIG_AUDIO_OSS),yes)
 OBJS+= audio.o
 endif
 
-EXTRALIBS += -L../libavutil -lavutil$(BUILDSUF)
+EXTRALIBS += -L../libavutil -lavutil$(BUILDSUF) -lavcodec$(BUILDSUF) -L../libavcodec
 
 ifeq ($(CONFIG_AUDIO_BEOS),yes)
-PPOBJS+= beosaudio.o
+CPPOBJS+= beosaudio.o
 endif
 
 # protocols I/O
@@ -95,72 +90,11 @@ ifeq ($(CONFIG_LIBOGG),yes)
 OBJS+= ogg.o
 endif
 
-ifeq ($(TARGET_ARCH_SPARC64),yes)
-CFLAGS+= -mcpu=ultrasparc -mtune=ultrasparc
-endif
-
 NAME=avformat
+SUBDIR=libavformat
 ifeq ($(BUILD_SHARED),yes)
 LIBVERSION=$(LAVFVERSION)
 LIBMAJOR=$(LAVFMAJOR)
-AVCLIBS+=-lavcodec$(BUILDSUF) -L../libavcodec -lavutil$(BUILDSUF) -L../libavutil
 endif
 
-SRCS := $(OBJS:.o=.c) $(PPOBJS:.o=.cpp)
-
-all: $(LIB) $(SLIBNAME)
-
-$(LIB): $(OBJS) $(PPOBJS)
-	rm -f $@
-	$(AR) rc $@ $(OBJS) $(PPOBJS)
-	$(RANLIB) $@
-
-$(SLIBNAME): $(OBJS)
-	$(CC) $(SHFLAGS) $(LDFLAGS) -o $@ $(OBJS) $(PPOBJS) $(AVCLIBS) $(EXTRALIBS)
-ifeq ($(CONFIG_WIN32),yes)
-	-lib /machine:i386 /def:$(@:.dll=.def)
-endif
-
-depend: $(SRCS)
-	$(CC) -MM $(CFLAGS) $^ 1>.depend
-
-
-install-lib-shared: $(SLIBNAME)
-ifeq ($(CONFIG_WIN32),yes)
-	install $(INSTALLSTRIP) -m 755 $(SLIBNAME) "$(prefix)"
-else
-	install $(INSTALLSTRIP) -m 755 $(SLIBNAME) \
-		$(libdir)/$(SLIBNAME_WITH_VERSION)
-	ln -sf $(SLIBNAME_WITH_VERSION) \
-		$(libdir)/$(SLIBNAME_WITH_MAJOR)
-	ln -sf $(SLIBNAME_WITH_VERSION) \
-		$(libdir)/$(SLIBNAME)
-endif
-
-install-lib-static: $(LIB)
-	install -m 644 $(LIB) "$(libdir)"
-
-install-headers:
-	install -m 644 avformat.h avio.h rtp.h rtsp.h rtspcodes.h "$(incdir)"
-	install -m 644 $(SRC_PATH)/libavformat.pc "$(libdir)/pkgconfig"
-
-%.o: %.c
-	$(CC) $(CFLAGS) $(LIBOBJFLAGS) -c -o $@ $<
-
-# BeOS: remove -Wall to get rid of all the "multibyte constant" warnings
-%.o: %.cpp
-	g++ $(subst -Wall,,$(CFLAGS)) -c -o $@ $<
-
-clean:
-	rm -f *.o *.d *~ *.a *.lib *.so *.dylib *.dll \
-	      *.lib *.def *.dll.a *.exp
-
-distclean: clean
-	rm -f .depend
-
-#
-# include dependency files if they exist
-#
-ifneq ($(wildcard .depend),)
-include .depend
-endif
+include $(SRC_PATH)/common.mak
diff --git a/libavutil/Makefile b/libavutil/Makefile
index 6f3ecd9dca..cd7f558ac2 100644
--- a/libavutil/Makefile
+++ b/libavutil/Makefile
@@ -3,8 +3,6 @@
 #
 include ../config.mak
 
-VPATH=$(SRC_PATH)/libavutil
-
 # NOTE: -I.. is needed to include config.h
 CFLAGS=$(OPTFLAGS) -DHAVE_AV_CONFIG_H -DBUILD_AVUTIL -I.. -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_GNU_SOURCE
 
@@ -18,71 +16,18 @@ OBJS= mathematics.o \
       rational.o \
       intfloat_readwrite.o \
 
+HEADERS = avutil.h common.h mathematics.h integer.h rational.h \
+          intfloat_readwrite.h
 
 ifeq ($(TARGET_ARCH_SPARC64),yes)
 CFLAGS+= -mcpu=ultrasparc -mtune=ultrasparc
 endif
 
-SRCS := $(OBJS:.o=.c)
-
 NAME=avutil
+SUBDIR = libavutil
 ifeq ($(BUILD_SHARED),yes)
 LIBVERSION=$(LAVUVERSION)
 LIBMAJOR=$(LAVUMAJOR)
 endif
 
-all: $(LIB) $(SLIBNAME)
-
-$(LIB): $(OBJS)
-	rm -f $@
-	$(AR) rc $@ $(OBJS)
-	$(RANLIB) $@
-
-$(SLIBNAME): $(OBJS)
-	$(CC) $(SHFLAGS) $(LDFLAGS) -o $@ $(OBJS) $(EXTRALIBS) $(AMREXTRALIBS)
-ifeq ($(CONFIG_WIN32),yes)
-	-lib /machine:i386 /def:$(@:.dll=.def)
-endif
-
-%.o: %.c
-	$(CC) $(CFLAGS) $(LIBOBJFLAGS) -c -o $@ $<
-
-depend: $(SRCS)
-	$(CC) -MM $(CFLAGS) $^ 1>.depend
-
-dep:	depend
-
-clean:
-	rm -f *.o *.d *~ *.a *.lib *.so *.dylib *.dll \
-	      *.lib *.def *.dll.a *.exp
-
-distclean: clean
-	rm -f .depend
-
-
-install-lib-shared: $(SLIBNAME)
-ifeq ($(CONFIG_WIN32),yes)
-	install $(INSTALLSTRIP) -m 755 $(SLIBNAME) "$(prefix)"
-else
-	install $(INSTALLSTRIP) -m 755 $(SLIBNAME) \
-		$(libdir)/$(SLIBNAME_WITH_VERSION)
-	ln -sf $(SLIBNAME_WITH_VERSION) \
-		$(libdir)/$(SLIBNAME_WITH_MAJOR)
-	ln -sf $(SLIBNAME_WITH_VERSION) \
-		$(libdir)/$(SLIBNAME)
-endif
-
-install-lib-static: $(LIB)
-	install -m 644 $(LIB) "$(libdir)"
-
-install-headers:
-	install -m 644 avutil.h common.h mathematics.h integer.h \
-	               rational.h intfloat_readwrite.h "$(incdir)"
-	install -m 644 $(SRC_PATH)/libavutil.pc "$(libdir)/pkgconfig"
-
-#
-# include dependency files if they exist
-#
-ifneq ($(wildcard .depend),)
-include .depend
-endif
+include $(SRC_PATH)/common.mak