Merge remote-tracking branch 'qatar/master'

* qatar/master:
  nuv: K&R formatting cosmetics
  build: generalise rules and variable settings for av* programs
  nuv: check RTjpeg header for validity
  Revert "nuv: check per-frame header for validity."
  imc: remove unused field IMCContext.one_div_log2
  imc: fix size of a memset()
  imc: remove empty if() block
  fate: simplify variable setting filter.mak
  lavf: Declare an AVRational struct without a struct literal

Conflicts:
	Makefile
	configure
	libavcodec/nuv.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>

Makefile

@@ -17,7 +17,7 @@ PROGS-$(CONFIG_FFSERVER) += ffserver
 
 PROGS      := $(PROGS-yes:%=%$(EXESUF))
 INSTPROGS   = $(PROGS-yes:%=%$(PROGSSUF)$(EXESUF))
-OBJS        = $(PROGS-yes:%=%.o) cmdutils.o
+OBJS        = cmdutils.o
 TESTTOOLS   = audiogen videogen rotozoom tiny_psnr base64
 HOSTPROGS  := $(TESTTOOLS:%=tests/%) doc/print_options
 TOOLS       = qt-faststart trasher
@@ -88,12 +88,19 @@ endef
 
 $(foreach D,$(FFLIBS),$(eval $(call DOSUBDIR,lib$(D))))
 
-ffplay.o: CFLAGS += $(SDL_CFLAGS)
-ffplay_g$(EXESUF): FF_EXTRALIBS += $(SDL_LIBS)
-ffserver_g$(EXESUF): LDFLAGS += $(FFSERVERLDFLAGS)
+define DOPROG
+OBJS-$(1) += $(1).o
+$(1)_g$(EXESUF): $(OBJS-$(1))
+$$(OBJS-$(1)): CFLAGS  += $(CFLAGS-$(1))
+$(1)_g$(EXESUF): LDFLAGS += $(LDFLAGS-$(1))
+$(1)_g$(EXESUF): FF_EXTRALIBS += $(LIBS-$(1))
+-include $$(OBJS-$(1):.o=.d)
+endef
+
+$(foreach P,$(PROGS-yes),$(eval $(call DOPROG,$(P))))
 
 %$(PROGSSUF)_g$(EXESUF): %.o cmdutils.o $(FF_DEP_LIBS)
-	$(LD) $(LDFLAGS) -o $@ $< cmdutils.o $(FF_EXTRALIBS)
+	$(LD) $(LDFLAGS) -o $@ $(OBJS-$*) cmdutils.o $(FF_EXTRALIBS)
 
 OBJDIRS += tools