problem building libavcodec59-5.0-shlibs on MacOS 10.11 (El Cap) / Xcode 8.2.1

Got this error trying to build ffmpeg.  Looks like it is trying to use “metal” under an old OS that doesn’t have that?  Just a wild guess from my looking at the errors.

-Scott


gcc -I. -Isrc/ -I/sw/include -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -I/sw/src/fink.build/libavcodec59-5.0-shlibs-5.0-1/ffmpeg-5.0/compat/dispatch_semaphore -DPIC -DZLIB_CONST -DHAVE_AV_CONFIG_H -DBUILDING_avfilter -fno-stack-check -I/sw/lib/libspeex1/include -I/sw/include -I/opt/X11/include -std=c11 -Werror=partial-availability -fomit-frame-pointer -fPIC -I/opt/X11/include -I/opt/X11/include -I/opt/X11/include -pthread -I/sw/include -I/sw/include -I/sw/include/libxml2 -I/sw/include -I/sw/include/freetype2 -I/sw/include -I/sw/include/bs2b -I/sw/include -I/sw/include -I/sw/include/freetype2 -I/sw/include/fribidi -I/sw/include -I/sw/include -I/sw/include -I/sw/include/openjpeg-2.4 -I/sw/include -I/sw/include/opus -I/sw/include/opus -I/sw/include -I/sw/include -I/sw/include -I/sw/include -I/sw/include -I/sw/include -I/sw/include -I/sw/include -I/sw/include -I/sw/include -I/sw/include -I/sw/include -I/sw/include -I/sw/include -I/sw/include -I/sw/include -I/sw/include -I/sw/include -I/sw/lib/libcdio-2.1/include -I/opt/X11/include -I/opt/X11/include -I/opt/X11/include -I/opt/X11/include -g -Wdeclaration-after-statement -Wall -Wdisabled-optimization -Wpointer-arith -Wredundant-decls -Wwrite-strings -Wtype-limits -Wundef -Wmissing-prototypes -Wstrict-prototypes -Wempty-body -Wno-parentheses -Wno-switch -Wno-format-zero-length -Wno-pointer-sign -Wno-unused-const-variable -Wno-char-subscripts -O3 -fno-math-errno -fno-signed-zeros -mstack-alignment=16 -Qunused-arguments -Werror=implicit-function-declaration -Werror=missing-prototypes -Werror=return-type -I/sw/include/SDL2 -D_THREAD_SAFE   -MMD -MF libavfilter/lswsutils.d -MT libavfilter/lswsutils.o -c -o libavfilter/lswsutils.o src/libavfilter/lswsutils.c
gcc -I. -Isrc/ -I/sw/include -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -I/sw/src/fink.build/libavcodec59-5.0-shlibs-5.0-1/ffmpeg-5.0/compat/dispatch_semaphore -DPIC -DZLIB_CONST -DHAVE_AV_CONFIG_H -DBUILDING_avfilter -fno-stack-check -I/sw/lib/libspeex1/include -I/sw/include -I/opt/X11/include -std=c11 -Werror=partial-availability -fomit-frame-pointer -fPIC -I/opt/X11/include -I/opt/X11/include -I/opt/X11/include -pthread -I/sw/include -I/sw/include -I/sw/in                                       ^
src/libavfilter/metal/utils.h:57:48: error: expected function body after function declarator
                                               API_AVAILABLE(macos(10.11), ios(8.0));
                                               ^
src/libavfilter/metal/utils.m:22:6: error: no previous prototype for function 'ff_metal_compute_encoder_dispatch' [-Werror,-Wmissing-prototypes]
void ff_metal_compute_encoder_dispatch(id<MTLDevice> device,
     ^
src/libavfilter/metal/utils.m:50:19: error: no previous prototype for function 'ff_metal_texture_from_pixbuf' [-Werror,-Wmissing-prototypes]
CVMetalTextureRef ff_metal_texture_from_pixbuf(void *ctx,
                  ^
4 errors generated.
make: *** [/sw/src/fink.build/libavcodec59-5.0-shlibs-5.0-1/ffmpeg-5.0/ffbuild/common.mak:84: libavfilter/metal/utils.o] Error 1
make: Leaving directory '/sw/src/fink.build/libavcodec59-5.0-shlibs-5.0-1/ffmpeg-5.0/finkbuild'
### execution of /tmp/fink.0NYUC failed, exit code 2
### execution of /tmp/fink.uyzHF failed, exit code 2
Removing runtime build-lock...
Removing build-lock package...
/sw/bin/dpkg-lockwait -r fink-buildlock-libavcodec59-5.0-shlibs-5.0-1
(Reading database ... 309978 files and directories currently installed.)
Removing fink-buildlock-libavcodec59-5.0-shlibs-5.0-1 ...
Failed: phase compiling: libavcodec59-5.0-shlibs-5.0-1 failed

Also include the following system information:
Package manager version: 0.45.6
Distribution version: selfupdate-git Tue Apr 12 20:58:34 2022, 10.11, x86_64
Trees: local/main stable/main local/injected
Xcode.app: 8.2.1
Xcode command-line tools: 8.2.0.0.1.1480973914
Max. Fink build jobs:  1

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