..\..\..\3rdparty\libwebp\src\dsp\alpha_processing_sse41.c(52,26): error: always_inline function '_mm_shuffle_epi8' requires target feature 'ssse3', but would be inlined into function 'ExtractAlpha' that is compiled without support for 'ssse3' const __m128i b0 = _mm_shuffle_epi8(a0, kCstAlpha0); ^ ..\..\..\3rdparty\libwebp\src\dsp\alpha_processing_sse41.c(53,26): error: always_inline function '_mm_shuffle_epi8' requires target feature 'ssse3', but would be inlined into function 'ExtractAlpha' that is compiled without support for 'ssse3' const __m128i b1 = _mm_shuffle_epi8(a1, kCstAlpha1); ^ ..\..\..\3rdparty\libwebp\src\dsp\alpha_processing_sse41.c(54,26): error: always_inline function '_mm_shuffle_epi8' requires target feature 'ssse3', but would be inlined into function 'ExtractAlpha' that is compiled without support for 'ssse3' const __m128i b2 = _mm_shuffle_epi8(a2, kCstAlpha2); ^ ..\..\..\3rdparty\libwebp\src\dsp\alpha_processing_sse41.c(55,26): error: always_inline function '_mm_shuffle_epi8' requires target feature 'ssse3', but would be inlined into function 'ExtractAlpha' that is compiled without support for 'ssse3' const __m128i b3 = _mm_shuffle_epi8(a3, kCstAlpha3); ^ 4 errors generated. NMAKE : fatal error U1077: 'C:\dev\llvm\llvm40_64\bin\clang-cl.EXE' : return code '0x1' Stop. NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Tools\MSVC\14.11.25503\bin\HostX64\x64\nmake.exe"' : return code '0x2' Stop. NMAKE : fatal error U1077: 'cd' : return code '0x2' Stop. NMAKE : fatal error U1077: 'cd' : return code '0x2' Stop. NMAKE : fatal error U1077: 'cd' : return code '0x2' Stop. NMAKE : fatal error U1077: 'cd' : return code '0x2' Stop.