Firefox error

[The Doctor]

Why am I getting:

In file included from Unified_cpp_libsoundtouch_src0.cpp:47:
/usr/ports/www/firefox/work/firefox-88.0/media/libsoundtouch/src/InterpolateShannon.cpp:71:9: warning: 'PI' macro redefined [-Wmacro-redefined]
#define PI 3.1415926536
        ^
/usr/ports/www/firefox/work/firefox-88.0/media/libsoundtouch/src/AAFilter.cpp:45:9: note: previous definition is here
#define PI       M_PI
	^
In file included from Unified_cpp_image_decoders0.cpp:11:
/usr/ports/www/firefox/work/firefox-88.0/image/decoders/nsAVIFDecoder.cpp:656:60: error: use of undeclared identifier 'AOM_PLANE_ALPHA'
  MOZ_ASSERT(aImage->stride[AOM_PLANE_Y] == aImage->stride[AOM_PLANE_ALPHA]);
						     ^
/usr/ports/www/firefox/work/firefox-88.0/image/decoders/nsAVIFDecoder.cpp:656:60: error: use of undeclared identifier 'AOM_PLANE_ALPHA'
In file included from Unified_cpp_libsoundtouch_src0.cpp:92:
/usr/ports/www/firefox/work/firefox-88.0/media/libsoundtouch/src/cpu_detect_x86.cpp:48:12: warning: 'bit_MMX' macro redefined [-Wmacro-redefined]
#define bit_MMX     (1 << 23)
   ^
/usr/local/llvm11/lib/clang/11.0.1/include/cpuid.h:130:9: note: previous definition is here
#define bit_MMX         0x00800000
		   ^
In file included from Unified_cpp_libsoundtouch_src0.cpp:92:
/usr/ports/www/firefox/work/firefox-88.0/media/libsoundtouch/src/cpu_detect_x86.cpp:49:12: warning: 'bit_SSE' macro redefined [-Wmacro-redefined]
#define bit_SSE     (1 << 25)
		 ^
/usr/local/llvm11/lib/clang/11.0.1/include/cpuid.h:133:9: note: previous definition is here
#define bit_SSE         0x02000000
 ^
In file included from Unified_cpp_libsoundtouch_src0.cpp:92:
/usr/ports/www/firefox/work/firefox-88.0/media/libsoundtouch/src/cpu_detect_x86.cpp:50:12: warning: 'bit_SSE2' macro redefined [-Wmacro-redefined]
#define bit_SSE2    (1 << 26)
      ^
/usr/local/llvm11/lib/clang/11.0.1/include/cpuid.h:134:9: note: previous definition is here
#define bit_SSE2        0x04000000
^
4 warnings generated.

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