[FFmpeg-devel] OSX 10.5 (Leopard) build problem
Steven M. Schultz
Mon Nov 5 00:28:29 CET 2007
On Sun, 4 Nov 2007, SciFi wrote:
> Presently for Tiger and the libavcodec subtree, I've had to
> patch its Makefile in the following manner to get around some
Hmmm, on Tiger I had no problems at all once someone provided
the workaround/hack of using "-mdynamic-no-pic".
> compiler problems. I wonder if this will work for you on
> Leopard? (it's going to take me quite a while longer to get
Alas, no, it does not help. I added these lines
> Index: libavcodec/Makefile
> +h264.o: CFLAGS += -fomit-frame-pointer
> +i386/snowdsp_mmx.o: CFLAGS += -fomit-frame-pointer
> +i386/dsputil_mmx.o: CFLAGS += -fomit-frame-pointer -O1
and still have the error:
i386/dsputil_mmx.c:3003: error: can't find a register in class 'GENERAL_REGS' while reloading 'asm'
i386/dsputil_mmx.c:3005: error: can't find a register in class 'GENERAL_REGS' while reloading 'asm'
if -mdynamic-no-pic is not used. If that option is used then the
linker errors are encountered.
> Yes it's the -O1 that _finally_ fixed the issue with me on
> Tiger, any -O higher will introduce the register problem in
> dsputil_mmx.c with Apple's compiler.
Interesting - I had no issues compiling libavcodec on Tiger (either
PPC or Intel).
Would modifying the asm() code be an option? I am not an asm
coder but I would hope there would be a reordering or modifying the code
to not trigger the "can't find a register" error. Make the code pic
More information about the ffmpeg-devel