contrib: improve build rules for ffmpeg and libpostproc for iOS in case arch != arm

contrib/src/ffmpeg/rules.mak

@@ -60,8 +60,6 @@ endif
 ifdef HAVE_DARWIN_OS
 FFMPEGCONF += --arch=$(ARCH) --target-os=darwin
 FFMPEG_CFLAGS += -DHAVE_LRINTF
-endif
-ifdef HAVE_MACOSX
 ifneq ($(findstring $(ARCH),i386 x86_64),)
 FFMPEGCONF += --enable-memalign-hack
 endif
@@ -70,7 +68,7 @@ FFMPEGCONF += --cpu=core2
 endif
 endif
 ifdef HAVE_IOS
-FFMPEGCONF += --as="$(AS)" --enable-pic
+FFMPEGCONF += --enable-pic --as="$(AS)" --disable-decoder=snow
 ifeq ($(ARCH), arm)
 FFMPEGCONF += --cpu=cortex-a8
 endif

contrib/src/postproc/rules.mak

@@ -31,11 +31,14 @@ endif
 endif
 
 # Darwin
-ifdef HAVE_MACOSX
+ifdef HAVE_DARWIN_OS
 POSTPROCCONF += --arch=$(ARCH) --target-os=darwin
 endif
 ifdef HAVE_IOS
-POSTPROCCONF += --cpu=cortex-a8 --as="$(AS)" --target-os=darwin
+POSTPROCCONF += --as="$(AS)"
+ifeq ($(ARCH),arm)
+POSTPROCCONF += --cpu=cortex-a8
+endif
 endif
 ifeq ($(ARCH),x86_64)
 POSTPROCCONF += --cpu=core2