mplayer build fails on 9.99.98/i386

["John D. Baker" <jdbaker%consolidated.net@localhost>]

Building "multimedia/mplayer" fails on 9.99.98/i386 as follows:

[...]
cc -MMD -MP -Icompat/atomics/gcc -D_ISOC99_SOURCE -I. -O2 -I/usr/pkg/include/cdparanoia -fPIC -D_FORTIFY_SOURCE=2 -I/usr/pkg/include -I/usr/X11R7/include -I/usr/include -I/usr/pkg/include/faad2 -I/usr/pkg/include/SDL -I/usr/X11R7/include/libdrm -I/usr/X11R7/include/freetype2 -I/usr/pkg/include/ffmpeg5 -I/usr/pkg/include/harfbuzz -I/usr/pkg/include/glib-2.0 -I/usr/pkg/include/gio-unix-2.0 -I/usr/pkg/lib/glib-2.0/include -fno-asynchronous-unwind-tables -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -I/usr/pkg/include -I/usr/X11R7/include -I/usr/include -I/usr/pkg/include/faad2 -I/usr/pkg/include/SDL -I/usr/X11R7/include/libdrm -I/usr/X11R7/include/freetype2 -I/usr/pkg/include/ffmpeg5 -I/usr/pkg/include/harfbuzz -I/usr/pkg/include/glib-2.0 -I/usr/pkg/include/gio-unix-2.0 -I/usr/pkg/lib/glib-2.0/include -fpic -fpie -DPIC -D_THREAD_SAFE -I/usr/pkg/include -I/usr/pkg/include/p11-kit-1 -I/usr/X11R7/include -I/usr/pkg/include/ -I/usr/pkg/include -I/usr/X11R7/include/freetype2 -DZLIB_CONST -I/usr/pkg/include/ffmpeg5 -I/usr/pkg/include/ffmpeg5 -I/usr/pkg/include -c -o libmpcodecs/vf_gradfun.o libmpcodecs/vf_gradfun.c
libmpcodecs/vf_gradfun.c: In function 'blur_line_sse2':
libmpcodecs/vf_gradfun.c:196:5: error: 'asm' operand has impossible constraints
  196 |     __asm__ volatile(\
      |     ^~~~~~~
libmpcodecs/vf_gradfun.c:231:9: note: in expansion of macro 'BLURV'
  231 |         BLURV("movdqu");
      |         ^~~~~
libmpcodecs/vf_gradfun.c:196:5: error: 'asm' operand has impossible constraints
  196 |     __asm__ volatile(\
      |     ^~~~~~~
libmpcodecs/vf_gradfun.c:233:9: note: in expansion of macro 'BLURV'
  233 |         BLURV("movdqa");
      |         ^~~~~
gmake: *** [Makefile:730: libmpcodecs/vf_gradfun.o] Error 1
*** Error code 2

Stop.
make[1]: stopped in /x/pkgsrc/multimedia/mplayer
*** Error code 1

Stop.
make: stopped in /x/pkgsrc/multimedia/mplayer


These options are currently enabled:
	aalib caca cdparanoia dts dv dvdnav dvdread
	faad ggi gif gnutls jpeg ladspa libmpg123
	mplayer-menu mplayer-runtime-cpudetection
	mplayer-ssse3 png sdl v4l2 vdpau


Build host is amd64-class hardware running i386 distribution with custom
PAE-enabled kernel.

No problem with same system, same options under netbsd-9/i386 also with
custom PAE-enabled kernel.  Using pkgsrc-2022Q2.

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