Build error on FreeBSD related to libvpx

[Calinou]

Godot version: Git 550f436

OS/device including version: FreeBSD cirrus-task-6329169808457728 12.0-RELEASE FreeBSD 12.0-RELEASE r341666 GENERIC amd64 on Cirrus CI

Issue description:

Building fails on FreeBSD due to libvpx:

thirdparty/libvpx/vpx_dsp/x86/vpx_subpixel_8t_intrin_ssse3.c:92:18: error: always_inline function '_mm_shuffle_epi8' requires target feature 'ssse3', but would be inlined into function 'vpx_filter_block1d4_h8_intrin_ssse3' that is compiled without support for 'ssse3'
    srcRegFilt1= _mm_shuffle_epi8(srcReg, shuffle1);
                 ^
thirdparty/libvpx/vpx_dsp/x86/vpx_subpixel_8t_intrin_ssse3.c:93:18: error: always_inline function '_mm_shuffle_epi8' requires target feature 'ssse3', but would be inlined into function 'vpx_filter_block1d4_h8_intrin_ssse3' that is compiled without support for 'ssse3'
    srcRegFilt2= _mm_shuffle_epi8(srcReg, shuffle2);
                 ^
thirdparty/libvpx/vpx_dsp/x86/vpx_subpixel_8t_intrin_ssse3.c:96:19: error: always_inline function '_mm_maddubs_epi16' requires target feature 'ssse3', but would be inlined into function 'vpx_filter_block1d4_h8_intrin_ssse3' that is compiled without support for 'ssse3'
    srcRegFilt1 = _mm_maddubs_epi16(srcRegFilt1, firstFilters);
                  ^
thirdparty/libvpx/vpx_dsp/x86/vpx_subpixel_8t_intrin_ssse3.c:97:19: error: always_inline function '_mm_maddubs_epi16' requires target feature 'ssse3', but would be inlined into function 'vpx_filter_block1d4_h8_intrin_ssse3' that is compiled without support for 'ssse3'
    srcRegFilt2 = _mm_maddubs_epi16(srcRegFilt2, secondFilters);

This can be worked around by passing module_webm_enabled=no to the SCons command line.

Steps to reproduce: Build an editor or export template for the x11 platform with the WebM module enabled.

[kb173]

I'm getting this error when building Godot on the current da502f7 with Ubuntu 19 too. With module_webm_enabled=no it works, as you said.