[FFmpeg-devel] How to wire asm to the makefile

Book Moons waic9e at protonmail.com
Mon Jul 9 07:29:21 EEST 2018


Hello,

I have a Power optimized function in asm for an upcoming patch. Having some trouble figuring out how to wire it up to the makefiles / build system. Are there any docs on how to do that?

The only other example of Power asm seems to be libavcodec/ppc/fft_altivec.S. That's simply appended to the OBJS-yes variable:

OBJS-$(CONFIG_FFT)   += ppc/fft_init.o                \
                                          ppc/fft_altivec.o             \
                                          ppc/fft_vsx.o

Doing the same thing in the relevant makefile (for libswscale/ppc) doesn't seem to work.

OBJS += ppc/swscale_altivec.o                                     \
        ppc/yuv2rgb_altivec.o                                           \
        ppc/yuv2yuv_altivec.o                                           \
        ppc/hScale8To15_vsx.o

It looks for a .c file. Building with that change gives this error:

>make: *** No rule to make target 'src/libswscale/ppc/hScale8To15_vsx.c', needed by 'libswscale/ppc/hScale8To15_vsx.o'. Stop.



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