+## check against tuple: B-SYSTEM where B is { 0 | 1 } for cross-compiling flag
+ifeq (0-cygwin,$(BUILD.cross)-$(BUILD.system))
+ FFMPEG.CONFIGURE.extra += --enable-pthreads --enable-memalign-hack
+ FFMPEG.GCC.args.extra = -fno-common
+else ifeq (1-darwin,$(BUILD.cross)-$(BUILD.system))
+ ## section for darwin-archs
+ FFMPEG.CONFIGURE.extra += --enable-pthreads --enable-cross-compile --arch=$(BUILD.machine)
+else ifeq (1-mingw,$(BUILD.cross)-$(BUILD.system))
+ FFMPEG.CONFIGURE.extra += \
+ --enable-w32threads \
+ --enable-memalign-hack \
+ --target-os=mingw32 \
+ --enable-cross-compile --cross-prefix=$(BUILD.cross.prefix)
+ FFMPEG.GCC.args.extra += -fno-common
+else
+ FFMPEG.CONFIGURE.extra += --enable-pthreads