Can not build with clang in r2819

[fuchanghao]

Seems the MSVC version check didn't work fine with clang.

The C compiler identification is Clang 3.8.0
The CXX compiler identification is Clang 3.8.0
Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Enterprise/VC/Tools/ClangC2/14.10.25903/bin/HostX86/clang.exe
Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Enterprise/VC/Tools/ClangC2/14.10.25903/bin/HostX86/clang.exe -- works
Detecting C compiler ABI info
Detecting C compiler ABI info - done
Detecting C compile features
Detecting C compile features - done
Check for working CXX compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Enterprise/VC/Tools/ClangC2/14.10.25903/bin/HostX86/clang.exe
Check for working CXX compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Enterprise/VC/Tools/ClangC2/14.10.25903/bin/HostX86/clang.exe -- works
Detecting CXX compiler ABI info
Detecting CXX compiler ABI info - done
Detecting CXX compile features
Detecting CXX compile features - done
CMake Error at CMakeLists.txt:26 (MESSAGE):
Visual C++ 2017 or newer required.

[pinterf]

Which toolset are you using?

Seems like the toolset check is not complete, and this clang version does not report MS compatible versioning, it's not pretending to be an ms cl-compatible compiler.
Have you used clang based avisynth compilation previously?

• Added VS 2017 install option clang_c2 toolset support (optional)
• (Removed v140 toolset, don't know if it was necessary or not)
• Fresh installed LLVM 7.0.1
• replaced toolset.targets and toolset.props (located in c:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\VC\VCTargets\Platforms\x64\PlatformToolsets\v141_clang_c2) to a special version found here: https://stackoverflow.com/questions/43464856/integrate-llvm-clang-4-x-x-5-x-x-6-x-x-into-visual-studio-2017
• I'm using from cmake GUI, and choose v141_clang_c2 as the -T optional toolset.
• I had the following log (see later):
• had to edit compiler flags and the cmakelists.txt to update or delete some default compiler options, but finally
• succeeded with compiling an x64 avisynth.dll (no time to try if it really worked)

So the log:
The C compiler identification is MSVC 19.16.27027.1
The CXX compiler identification is MSVC 19.16.27027.1
Check for working C compiler: C:/Program Files/LLVM/bin/clang.exe
Check for working C compiler: C:/Program Files/LLVM/bin/clang.exe -- works
Detecting C compiler ABI info
Detecting C compiler ABI info - done
Check for working CXX compiler: C:/Program Files/LLVM/bin/clang.exe
Check for working CXX compiler: C:/Program Files/LLVM/bin/clang.exe -- works
Detecting CXX compiler ABI info
Detecting CXX compiler ABI info - done
Detecting CXX compile features
Detecting CXX compile features - done
v141_clang_c2 toolset was specified via -T. Reported MSVC_VERSION is: 1916
Found Git: C:/Program Files/Git/cmd/git.exe (found version "2.17.1.windows.2")
Configuring done

[fuchanghao]

seem there's an easy way.

change Cmakelists.txt "v141_clang_c2" to "llvm"

Install Clang Power Tools & LLVM Compiler Toolchain

https://marketplace.visualstudio.com/items?itemName=caphyon.ClangPowerTools
https://marketplace.visualstudio.com/items?itemName=LLVMExtensions.llvm-toolchain

Cmake log

The C compiler identification is Clang 7.0.1
The CXX compiler identification is Clang 7.0.1
Check for working C compiler: C:/Program Files/LLVM/bin/clang-cl.exe
Check for working C compiler: C:/Program Files/LLVM/bin/clang-cl.exe -- works
Detecting C compiler ABI info
Detecting C compiler ABI info - done
Detecting C compile features
Detecting C compile features - done
Check for working CXX compiler: C:/Program Files/LLVM/bin/clang-cl.exe
Check for working CXX compiler: C:/Program Files/LLVM/bin/clang-cl.exe -- works
Detecting CXX compiler ABI info
Detecting CXX compiler ABI info - done
Detecting CXX compile features
Detecting CXX compile features - done
llvm toolset was specified via -T. Reported MSVC_VERSION is: 1916
Found Git: C:/Program Files/Git/cmd/git.exe (found version "2.21.0.windows.1")
Configuring done
Generating done

[pinterf]

Yeah, much simpler. But something is still different.

How did you make it built?

When I said that I had successful build with the "hacked" v141_clang_c2, I was wrong. It seems that not the right cl.exe was used, the compilation was still using the original CL.EXE as shown in the build log (Tools|Options|Projects and solutions|MS Build Verbosity: "Detailed":

C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\bin\HostX86\x64\CL.exe .. etc.......

With LLVM toolset chosen, the proper compiler is used as seen from the verbose build log:
C:\Program Files\LLVM\bin\clang-cl.exe /c etc....

So with LLVM toolset the project does not compile (undeclared identifier errors on sse 4.1 things like _mm_packus_epi32), because for example convert.cpp requires sse4.1 intrinsic.
O.K., I put the include: #include <smmintrin.h>

But after providing that this type of errors appear:
always_inline function '_mm_packus_epi32' requires target feature 'sse4.1', but would be inlined into function 'convert_rgb_uint16_to_uint16_sse2' that is compiled without support for 'sse4.1'

Unlike clang-cl (maybe I'm not aware of a magic compiler switch) MSVC allows using SSE4.1 intrinsics (in MSVC there is no specific "-msse41" for that), if I emit that intrinsic it will insert an SSE4.1 instruction even if the project is compiled to SSE2 as general.

[qyot27]

From what I understand of the way Clang works internally, if it's not mimicking MSVC on Windows, it's mimicking GCC. And that intrinsics issue is something that GCC suffers from too.

The solution, ultimately, is to do for every SIMD set what we do for avx and avx2, so that none of the intrinsics alters the way the whole project is optimized; doing so should also allow for building without any intrinsics/asm at all, which will help any possible effort to build for alternate platforms like ARM (which Windows 10 does exist for, and ReactOS may eventually become available for as well, setting aside any Linux effort that would make ARM and PowerPC relevant somewhat immediately).

[fuchanghao]

* v141_clang_c2

After using your guide,

I still can't build Shibatch the same as using MSVC and it will crash the Visual Studio 2017.

I also tried v142 in visual studio 2019 RC it showed the same error.

2>byte_order_helper.cpp
2>d:\source code\avisynth\avisynthplus\plugins\shibatch\pfc\ptr_list.h(190): error C2065: “delete_all”: 未声明的标识符
2>d:\source code\avisynth\avisynthplus\plugins\shibatch\pfc\ptr_list.h(190): error C3861: “delete_all”: 找不到标识符
2>d:\source code\avisynth\avisynthplus\plugins\shibatch\pfc\ptr_list.h(190): note: “delete_all”: 函数声明必须可用，因为所有参数都不依赖于模板参数
2>d:\source code\avisynth\avisynthplus\plugins\shibatch\pfc\ptr_list.h(191): note: 参见对正在编译的 类 模板 实例化 "ptr_list_autodel_t" 的引用
2>d:\source code\avisynth\avisynthplus\plugins\shibatch\pfc\ptr_list.h(198): error C2065: “free_all”: 未声明的标识符
2>d:\source code\avisynth\avisynthplus\plugins\shibatch\pfc\ptr_list.h(198): error C3861: “free_all”: 找不到标识符
2>d:\source code\avisynth\avisynthplus\plugins\shibatch\pfc\ptr_list.h(198): note: “free_all”: 函数声明必须可用，因为所有参数都不依赖于模板参数
2>d:\source code\avisynth\avisynthplus\plugins\shibatch\pfc\ptr_list.h(199): note: 参见对正在编译的 类 模板 实例化 "ptr_list_autofree_t" 的引用

Clang-cl won't cause that error.

but it also has the error:

3>D:\Source code\AviSynth\AviSynthPlus\plugins\Shibatch\ssrc.cpp(162): error : expected parentheses around type name in sizeof expression

[pinterf]

In newer gcc (and clang?) function level attributes exist.
https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#Common-Function-Attributes
See "target" section. E.g.

int core2_func (void) __attribute__ ((__target__ ("arch=core2")));
int sse3_func (void) __attribute__ ((__target__ ("sse3")));

This is an easy way to go.

Still I think that functions that are compiled with sse2 or sse4.1 chosen purely on a template parameter should be reorganized a bit and should really be separated/moved to an include file. Plus some constexpr will also help which inactivates parts of code on compile time and does not depend on optimizer's choice whether it is included or not (like non-constexpr paths are existing in Debug builds).

Seems I'll have some work on this topic.

[pinterf]

Actually Shibatch source needed a minor fix to compile properly.

[fuchanghao]

Actually Shibatch source needed a minor fix to compile properly.

It works fine now.

[pinterf]

Those attributes will work, I'll probably implement them. I've just tried it on RemoveDirt project.
So this is the way to go, probably works for gcc as well (contrary to the name of the option: no-gcc-compat)
https://github.com/pinterf/RemoveDirt/blob/master/RemoveDirt/RemoveDirt.cpp#L955

[pinterf]

Please check latest commits. I'm using LLVM 8.0. Lots of code changes, mainly in order to let clang (and hopefully gcc) to apply special code generation attributes for CPU extensions (e.g. SSE4.1) for specific functions, without the need for moving those functions in a different source file.

@qyot27: could not try gcc, feel free to modify the #ifdef clang sections for gcc as well, when applying function attributes. I hope it'll work for you. I'll wait for your results.

[qyot27]

Any particular reason to use __clang__ instead of the CLANG define provided by avs/config.h?

Anyway, modifying all the places where #ifdef __clang__ showed up to #if defined(CLANG) || defined(GCC), unsetting -march=native in CMakeLists.txt, and attempting to build, it failed. GCC wants the attributes before the function definition. So I moved the ones that actually were setting attributes to up above the functions they were defined for, and this mostly succeeded. There were build errors in only two spots left: blend_common.cpp and resample.cpp:

[i686:$] ninja
[2/4] Building CXX object avs_core/CMa...r/filters/overlay/blend_common.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj -c ../../avs_core/filters/overlay/blend_common.cpp
../../avs_core/filters/overlay/blend_common.cpp: In function 'void overlay_blend_sse41_plane_masked(BYTE*, const BYTE*, const BYTE*, int, int, int, int, int) [with pixel_t = unsigned char; int bits_per_pixel = 8]':
../../avs_core/filters/overlay/blend_common.cpp:314:30: error: inlining failed in call to always_inline '__m128i simd_blend_epi8_sse41(const __m128i&, const __m128i&, const __m128i&)': target specific option mismatch
 static __forceinline __m128i simd_blend_epi8_sse41(__m128i const &selector, __m128i const &a, __m128i const &b)
                              ^~~~~~~~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:443:39: note: called from here
         result = simd_blend_epi8_sse41(mask_00, dst, result); // ensure that zero mask value returns dst
                  ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:314:30: error: inlining failed in call to always_inline '__m128i simd_blend_epi8_sse41(const __m128i&, const __m128i&, const __m128i&)': target specific option mismatch
 static __forceinline __m128i simd_blend_epi8_sse41(__m128i const &selector, __m128i const &a, __m128i const &b)
                              ^~~~~~~~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:443:39: note: called from here
         result = simd_blend_epi8_sse41(mask_00, dst, result); // ensure that zero mask value returns dst
                  ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:314:30: error: inlining failed in call to always_inline '__m128i simd_blend_epi8_sse41(const __m128i&, const __m128i&, const __m128i&)': target specific option mismatch
 static __forceinline __m128i simd_blend_epi8_sse41(__m128i const &selector, __m128i const &a, __m128i const &b)
                              ^~~~~~~~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:446:39: note: called from here
         result = simd_blend_epi8_sse41(mask_FF, src, result); // ensure that max mask value returns src
                  ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:314:30: error: inlining failed in call to always_inline '__m128i simd_blend_epi8_sse41(const __m128i&, const __m128i&, const __m128i&)': target specific option mismatch
 static __forceinline __m128i simd_blend_epi8_sse41(__m128i const &selector, __m128i const &a, __m128i const &b)
                              ^~~~~~~~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:446:39: note: called from here
         result = simd_blend_epi8_sse41(mask_FF, src, result); // ensure that max mask value returns src
                  ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
[3/4] Building CXX object avs_core/CMa...s/AvsCore.dir/filters/resample.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj -c ../../avs_core/filters/resample.cpp
../../avs_core/filters/resample.cpp: In function 'void resize_v_ssse3_planar(BYTE*, const BYTE*, int, int, ResamplingProgram*, int, int, int, const int*, const void*) [with __m128i (* load)(const __m128i*) = simd_load_streaming]':
../../avs_core/filters/resample.cpp:81:23: error: inlining failed in call to always_inline '__m128i simd_load_streaming(const __m128i*)': target specific option mismatch
 __forceinline __m128i simd_load_streaming(const __m128i* adr)
                       ^~~~~~~~~~~~~~~~~~~
../../avs_core/filters/resample.cpp:415:29: note: called from here
         __m128i src_p = load(reinterpret_cast<const __m128i*>(src2_ptr));
                         ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ninja: build stopped: subcommand failed.
[i686:$] 

There were also errors relating to extern/static definitions in field.cpp, stemming from a mismatch in the "Factory methods" section between it and field.h, which has a similar section without the static keywords on the corresponding names.

[pinterf]

I understood the resampler troubles, giving an SSE4.1 forceinlined function as template parameter for an SSSE3 function, strange clang did not noticed. A similar issue was fixed earlier at an other place which even caused internal compiler error :).

The other sse41 blend issue is probably solved by inserting that single instruction directly.

I have not yet changed the ifdefs for GCC and CLANG
And I simply forgot that we have already a CLANG define
About placing the attribute after the function: the sample I found and provided previously was using it in such a way.

So next try please, I hope we are getting closer to the final success.

[fuchanghao]

I understood the resampler troubles, giving an SSE4.1 forceinlined function as template parameter for an SSSE3 function, strange clang did not noticed. A similar issue was fixed earlier at an other place which even caused internal compiler error :).

The other sse41 blend issue is probably solved by inserting that single instruction directly.

I have not yet changed the ifdefs for GCC and CLANG
And I simply forgot that we have already a CLANG define
About placing the attribute after the function: the sample I found and provided previously was using it in such a way.

So next try please, I hope we are getting closer to the final success.

r2842 build with VS 2019 RC4 & LLVM 8.0 works fine.

Not test LLVM built's WinXP support. (MSVC v142 no longer support WinXP)

[pinterf]

LLVM dropped XP support 3 years ago.

@qyot27: by this documentation function attributes appear after the function:
https://gcc.gnu.org/onlinedocs/gcc-4.9.1/gcc/Function-Attributes.html#Function-Attributes
On the other hand, there are situations which feel better with placing them before the function.
https://stackoverflow.com/questions/41159934/where-to-place-gcc-function-attribute-in-auto-function.
Can you tell me which kind of functions (templated ones?) are those which do not like the 'after' syntax?

[qyot27]

After disabling the use of -march=native:

mkdir -p avisynth-build/i686 avisynth-build/amd64 && \

cd avisynth-build/i686 && \
    cmake ../../ -G "Ninja" -DCMAKE_INSTALL_PREFIX=$HOME/avisynth+_build/32bit \
    -DCMAKE_TOOLCHAIN_FILE="/usr/x86_64-w64-mingw32/toolchain-x86_64-w64-mingw32.cmake" \
    -DCMAKE_C_FLAGS="-m32" -DCMAKE_CXX_FLAGS="-m32" -DCMAKE_RC_FLAGS="-F pe-i386" \
    -DENABLE_PLUGINS:bool=off

-- The C compiler identification is GNU 8.3.0
-- The CXX compiler identification is GNU 8.3.0
-- Check for working C compiler: /usr/bin/x86_64-w64-mingw32-gcc
-- Check for working C compiler: /usr/bin/x86_64-w64-mingw32-gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/x86_64-w64-mingw32-g++
-- Check for working CXX compiler: /usr/bin/x86_64-w64-mingw32-g++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found Git: /usr/bin/git (found version "2.19.1") 
-- Configuring done
-- Generating done
-- Build files have been written to: /home/qyot27/AviSynthPlus/avisynth-build/i686
[i686:$] ninja
[3/86] Building CXX object avs_core/CM...vsCore.dir/convert/convert_rgb.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/convert/convert_rgb.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/convert/convert_rgb.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/convert/convert_rgb.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/convert/convert_rgb.cpp.obj -c ../../avs_core/convert/convert_rgb.cpp
In file included from ../../avs_core/convert/convert_rgb.cpp:37:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/tmmintrin.h: In function 'void convert_rgb48_to_rgb64_ssse3(const BYTE*, BYTE*, size_t, size_t, size_t, size_t)':
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/tmmintrin.h:136:1: error: inlining failed in call to always_inline '__m128i _mm_shuffle_epi8(__m128i, __m128i)': target specific option mismatch
 _mm_shuffle_epi8 (__m128i __X, __m128i __Y)
 ^~~~~~~~~~~~~~~~
../../avs_core/convert/convert_rgb.cpp:71:33: note: called from here
       __m128i dst = _mm_or_si128(alpha, _mm_shuffle_epi8(src0, mask0));
                     ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/convert/convert_rgb.cpp:37:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/tmmintrin.h:136:1: error: inlining failed in call to always_inline '__m128i _mm_shuffle_epi8(__m128i, __m128i)': target specific option mismatch
 _mm_shuffle_epi8 (__m128i __X, __m128i __Y)
 ^~~~~~~~~~~~~~~~
../../avs_core/convert/convert_rgb.cpp:71:33: note: called from here
       __m128i dst = _mm_or_si128(alpha, _mm_shuffle_epi8(src0, mask0));
                     ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/convert/convert_rgb.cpp:37:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/tmmintrin.h:136:1: error: inlining failed in call to always_inline '__m128i _mm_shuffle_epi8(__m128i, __m128i)': target specific option mismatch
 _mm_shuffle_epi8 (__m128i __X, __m128i __Y)
 ^~~~~~~~~~~~~~~~
../../avs_core/convert/convert_rgb.cpp:76:25: note: called from here
       dst = _mm_or_si128(alpha, _mm_shuffle_epi8(tmp, mask0));
             ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/convert/convert_rgb.cpp:37:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/tmmintrin.h:136:1: error: inlining failed in call to always_inline '__m128i _mm_shuffle_epi8(__m128i, __m128i)': target specific option mismatch
 _mm_shuffle_epi8 (__m128i __X, __m128i __Y)
 ^~~~~~~~~~~~~~~~
../../avs_core/convert/convert_rgb.cpp:81:25: note: called from here
       dst = _mm_or_si128(alpha, _mm_shuffle_epi8(tmp, mask0));
             ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/convert/convert_rgb.cpp:37:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/tmmintrin.h:136:1: error: inlining failed in call to always_inline '__m128i _mm_shuffle_epi8(__m128i, __m128i)': target specific option mismatch
 _mm_shuffle_epi8 (__m128i __X, __m128i __Y)
 ^~~~~~~~~~~~~~~~
../../avs_core/convert/convert_rgb.cpp:84:25: note: called from here
       dst = _mm_or_si128(alpha, _mm_shuffle_epi8(src2, mask1));
             ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[4/86] Building CXX object avs_core/CM...ore.dir/convert/convert_planar.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/convert/convert_planar.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/convert/convert_planar.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/convert/convert_planar.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/convert/convert_planar.cpp.obj -c ../../avs_core/convert/convert_planar.cpp
In file included from ../../avs_core/convert/convert_planar.cpp:47:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h: In function 'void convert_planarrgb_to_yuv_uint16_sse41(BYTE* (&)[3], int (&)[3], const BYTE* (&)[3], const int (&)[3], int, int, const ConversionMatrix&) [with int bits_per_pixel = 16]':
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:558:1: error: inlining failed in call to always_inline '__m128i _mm_packus_epi32(__m128i, __m128i)': target specific option mismatch
 _mm_packus_epi32 (__m128i __X, __m128i __Y)
 ^~~~~~~~~~~~~~~~
../../avs_core/convert/convert_planar.cpp:1209:28: note: called from here
       vi = _mm_packus_epi32(vi, zero);
            ~~~~~~~~~~~~~~~~^~~~~~~~~~
In file included from ../../avs_core/convert/convert_planar.cpp:47:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:558:1: error: inlining failed in call to always_inline '__m128i _mm_packus_epi32(__m128i, __m128i)': target specific option mismatch
 _mm_packus_epi32 (__m128i __X, __m128i __Y)
 ^~~~~~~~~~~~~~~~
../../avs_core/convert/convert_planar.cpp:1194:28: note: called from here
       ui = _mm_packus_epi32(ui, zero);
            ~~~~~~~~~~~~~~~~^~~~~~~~~~
In file included from ../../avs_core/convert/convert_planar.cpp:47:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:558:1: error: inlining failed in call to always_inline '__m128i _mm_packus_epi32(__m128i, __m128i)': target specific option mismatch
 _mm_packus_epi32 (__m128i __X, __m128i __Y)
 ^~~~~~~~~~~~~~~~
../../avs_core/convert/convert_planar.cpp:1179:28: note: called from here
       yi = _mm_packus_epi32(yi, zero);
            ~~~~~~~~~~~~~~~~^~~~~~~~~~
In file included from ../../avs_core/convert/convert_planar.cpp:47:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:558:1: error: inlining failed in call to always_inline '__m128i _mm_packus_epi32(__m128i, __m128i)': target specific option mismatch
 _mm_packus_epi32 (__m128i __X, __m128i __Y)
 ^~~~~~~~~~~~~~~~
../../avs_core/convert/convert_planar.cpp:1179:28: note: called from here
       yi = _mm_packus_epi32(yi, zero);
            ~~~~~~~~~~~~~~~~^~~~~~~~~~
In file included from ../../avs_core/convert/convert_planar.cpp:47:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:558:1: error: inlining failed in call to always_inline '__m128i _mm_packus_epi32(__m128i, __m128i)': target specific option mismatch
 _mm_packus_epi32 (__m128i __X, __m128i __Y)
 ^~~~~~~~~~~~~~~~
../../avs_core/convert/convert_planar.cpp:1194:28: note: called from here
       ui = _mm_packus_epi32(ui, zero);
            ~~~~~~~~~~~~~~~~^~~~~~~~~~
In file included from ../../avs_core/convert/convert_planar.cpp:47:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:558:1: error: inlining failed in call to always_inline '__m128i _mm_packus_epi32(__m128i, __m128i)': target specific option mismatch
 _mm_packus_epi32 (__m128i __X, __m128i __Y)
 ^~~~~~~~~~~~~~~~
../../avs_core/convert/convert_planar.cpp:1209:28: note: called from here
       vi = _mm_packus_epi32(vi, zero);
            ~~~~~~~~~~~~~~~~^~~~~~~~~~
[8/86] Building CXX object avs_core/CM...es/AvsCore.dir/convert/convert.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/convert/convert.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/convert/convert.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/convert/convert.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/convert/convert.cpp.obj -c ../../avs_core/convert/convert.cpp
In file included from /usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/immintrin.h:37,
                 from ../../avs_core/convert/convert.cpp:45:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h: In function 'void convert_32_to_uintN_sse41(const BYTE*, BYTE*, int, int, int, int) [with pixel_t = short unsigned int; unsigned char targetbits = 10; bool chroma = false; bool fulls = true; bool fulld = true]':
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:288:1: error: inlining failed in call to always_inline '__m128i _mm_min_epu16(__m128i, __m128i)': target specific option mismatch
 _mm_min_epu16 (__m128i __X, __m128i __Y)
 ^~~~~~~~~~~~~
../../avs_core/convert/convert.cpp:1654:33: note: called from here
           result = _mm_min_epu16(result, max_pixel_value_128); // sse41, extra clamp for 10, 12, 14 bits
                    ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/immintrin.h:37,
                 from ../../avs_core/convert/convert.cpp:45:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:558:1: error: inlining failed in call to always_inline '__m128i _mm_packus_epi32(__m128i, __m128i)': target specific option mismatch
 _mm_packus_epi32 (__m128i __X, __m128i __Y)
 ^~~~~~~~~~~~~~~~
../../avs_core/convert/convert.cpp:1652:34: note: called from here
         result = _mm_packus_epi32(result_0, result_1); // sse41
                  ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
In file included from /usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/immintrin.h:37,
                 from ../../avs_core/convert/convert.cpp:45:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:288:1: error: inlining failed in call to always_inline '__m128i _mm_min_epu16(__m128i, __m128i)': target specific option mismatch
 _mm_min_epu16 (__m128i __X, __m128i __Y)
 ^~~~~~~~~~~~~
../../avs_core/convert/convert.cpp:1654:33: note: called from here
           result = _mm_min_epu16(result, max_pixel_value_128); // sse41, extra clamp for 10, 12, 14 bits
                    ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/immintrin.h:37,
                 from ../../avs_core/convert/convert.cpp:45:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:558:1: error: inlining failed in call to always_inline '__m128i _mm_packus_epi32(__m128i, __m128i)': target specific option mismatch
 _mm_packus_epi32 (__m128i __X, __m128i __Y)
 ^~~~~~~~~~~~~~~~
../../avs_core/convert/convert.cpp:1652:34: note: called from here
         result = _mm_packus_epi32(result_0, result_1); // sse41
                  ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
ninja: build stopped: subcommand failed.
[i686:$] 

After changing the Clang ifdefs to Clang or GCC ifdefs:

[i686:$] ninja
[3/86] Building CXX object avs_core/CM...vsCore.dir/convert/convert_rgb.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/convert/convert_rgb.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/convert/convert_rgb.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/convert/convert_rgb.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/convert/convert_rgb.cpp.obj -c ../../avs_core/convert/convert_rgb.cpp
../../avs_core/convert/convert_rgb.cpp:53:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("ssse3")))
 ^~~~~~~~~~~~~
../../avs_core/convert/convert_rgb.cpp:102:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("ssse3")))
 ^~~~~~~~~~~~~
../../avs_core/convert/convert_rgb.cpp:249:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("ssse3")))
 ^~~~~~~~~~~~~
../../avs_core/convert/convert_rgb.cpp:292:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("ssse3")))
 ^~~~~~~~~~~~~
../../avs_core/convert/convert_rgb.cpp:452:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("ssse3")))
 ^~~~~~~~~~~~~
../../avs_core/convert/convert_rgb.cpp:550:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("ssse3")))
 ^~~~~~~~~~~~~
[4/86] Building CXX object avs_core/CM...ore.dir/convert/convert_planar.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/convert/convert_planar.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/convert/convert_planar.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/convert/convert_planar.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/convert/convert_planar.cpp.obj -c ../../avs_core/convert/convert_planar.cpp
../../avs_core/convert/convert_planar.cpp:1137:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
../../avs_core/convert/convert_planar.cpp:1879:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
../../avs_core/convert/convert_planar.cpp:2062:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("ssse3")))
 ^~~~~~~~~~~~~
[8/86] Building CXX object avs_core/CM...es/AvsCore.dir/convert/convert.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/convert/convert.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/convert/convert.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/convert/convert.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/convert/convert.cpp.obj -c ../../avs_core/convert/convert.cpp
../../avs_core/convert/convert.cpp:1581:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
../../avs_core/convert/convert.cpp:1943:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
ninja: build stopped: subcommand failed.
[i686:$] 

After moving the target declarations above the definitions for only those in convert[_rgb|_planar].cpp:

[i686:$] ninja
[6/82] Building CXX object avs_core/CM...les/AvsCore.dir/core/AviHelper.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/core/AviHelper.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/core/AviHelper.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/core/AviHelper.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/core/AviHelper.cpp.obj -c ../../avs_core/core/AviHelper.cpp
../../avs_core/core/AviHelper.cpp:246:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("ssse3")))
 ^~~~~~~~~~~~~
../../avs_core/core/AviHelper.cpp:297:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("ssse3")))
 ^~~~~~~~~~~~~
../../avs_core/core/AviHelper.cpp:519:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
[11/82] Building CXX object avs_core/C...es/AvsCore.dir/convert/convert.cpp.obj
ninja: build stopped: subcommand failed.
[i686:$] 

After moving the target declarations above the definitions for only those in AviHelper.cpp:
The field.cpp static keyword issue I mentioned before:

[27/64] Building CXX object avs_core/C...iles/AvsCore.dir/filters/field.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/filters/field.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/filters/field.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/filters/field.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/filters/field.cpp.obj -c ../../avs_core/filters/field.cpp
../../avs_core/filters/field.cpp:955:25: error: 'AVSValue Create_DoubleWeave(AVSValue, void*, IScriptEnvironment*)' was declared 'extern' and later 'static' [-fpermissive]
 static AVSValue __cdecl Create_DoubleWeave(AVSValue args, void*, IScriptEnvironment* env)
                         ^~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/field.cpp:36:
../../avs_core/filters/field.h:424:18: note: previous declaration of 'AVSValue Create_DoubleWeave(AVSValue, void*, IScriptEnvironment*)'
 AVSValue __cdecl Create_DoubleWeave(AVSValue args, void*, IScriptEnvironment* env);
                  ^~~~~~~~~~~~~~~~~~
../../avs_core/filters/field.cpp:966:25: error: 'AVSValue Create_Weave(AVSValue, void*, IScriptEnvironment*)' was declared 'extern' and later 'static' [-fpermissive]
 static AVSValue __cdecl Create_Weave(AVSValue args, void*, IScriptEnvironment* env)
                         ^~~~~~~~~~~~
In file included from ../../avs_core/filters/field.cpp:36:
../../avs_core/filters/field.h:425:18: note: previous declaration of 'AVSValue Create_Weave(AVSValue, void*, IScriptEnvironment*)'
 AVSValue __cdecl Create_Weave(AVSValue args, void*, IScriptEnvironment* env);
                  ^~~~~~~~~~~~
../../avs_core/filters/field.cpp:975:25: error: 'AVSValue Create_Pulldown(AVSValue, void*, IScriptEnvironment*)' was declared 'extern' and later 'static' [-fpermissive]
 static AVSValue __cdecl Create_Pulldown(AVSValue args, void*, IScriptEnvironment* env)
                         ^~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/field.cpp:36:
../../avs_core/filters/field.h:426:18: note: previous declaration of 'AVSValue Create_Pulldown(AVSValue, void*, IScriptEnvironment*)'
 AVSValue __cdecl Create_Pulldown(AVSValue args, void*, IScriptEnvironment* env);
                  ^~~~~~~~~~~~~~~
../../avs_core/filters/field.cpp:985:25: error: 'AVSValue Create_SwapFields(AVSValue, void*, IScriptEnvironment*)' was declared 'extern' and later 'static' [-fpermissive]
 static AVSValue __cdecl Create_SwapFields(AVSValue args, void*, IScriptEnvironment* env)
                         ^~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/field.cpp:36:
../../avs_core/filters/field.h:427:18: note: previous declaration of 'AVSValue Create_SwapFields(AVSValue, void*, IScriptEnvironment*)'
 AVSValue __cdecl Create_SwapFields(AVSValue args, void*, IScriptEnvironment* env);
                  ^~~~~~~~~~~~~~~~~
../../avs_core/filters/field.cpp:992:25: error: 'AVSValue Create_Bob(AVSValue, void*, IScriptEnvironment*)' was declared 'extern' and later 'static' [-fpermissive]
 static AVSValue __cdecl Create_Bob(AVSValue args, void*, IScriptEnvironment* env)
                         ^~~~~~~~~~
In file included from ../../avs_core/filters/field.cpp:36:
../../avs_core/filters/field.h:428:18: note: previous declaration of 'AVSValue Create_Bob(AVSValue, void*, IScriptEnvironment*)'
 AVSValue __cdecl Create_Bob(AVSValue args, void*, IScriptEnvironment* env);
                  ^~~~~~~~~~

[29/64] Building CXX object avs_core/C...iles/AvsCore.dir/filters/focus.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/filters/focus.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/filters/focus.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/filters/focus.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/filters/focus.cpp.obj -c ../../avs_core/filters/focus.cpp
../../avs_core/filters/focus.cpp:195:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
../../avs_core/filters/focus.cpp:244:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
../../avs_core/filters/focus.cpp:314:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
../../avs_core/filters/focus.cpp:758:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
../../avs_core/filters/focus.cpp:1346:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
../../avs_core/filters/focus.cpp:1883:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
../../avs_core/filters/focus.cpp:1954:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("ssse3")))
 ^~~~~~~~~~~~~
../../avs_core/filters/focus.cpp:2071:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~

After moving the target declarations above the definitions for only those in focus.cpp and removing the static keywords in field.cpp:

[i686:$] ninja
[2/31] Building CXX object avs_core/CM.../AvsCore.dir/filters/greyscale.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/filters/greyscale.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/filters/greyscale.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/filters/greyscale.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/filters/greyscale.cpp.obj -c ../../avs_core/filters/greyscale.cpp
../../avs_core/filters/greyscale.cpp:136:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
[3/31] Building CXX object avs_core/CM...es/AvsCore.dir/filters/limiter.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/filters/limiter.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/filters/limiter.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/filters/limiter.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/filters/limiter.cpp.obj -c ../../avs_core/filters/limiter.cpp
../../avs_core/filters/limiter.cpp:77:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
[7/31] Building CXX object avs_core/CM...les/AvsCore.dir/filters/levels.cpp.obj
ninja: build stopped: subcommand failed.
[i686:$] 

After moving the target declarations above the definitions for only those in greyscale.cpp and limiter.cpp:

[i686:$] ninja
[11/27] Building CXX object avs_core/C...dir/filters/overlay/444convert.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/filters/overlay/444convert.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/filters/overlay/444convert.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/filters/overlay/444convert.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/filters/overlay/444convert.cpp.obj -c ../../avs_core/filters/overlay/444convert.cpp
../../avs_core/filters/overlay/444convert.cpp:421:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
../../avs_core/filters/overlay/444convert.cpp:507:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
../../avs_core/filters/overlay/444convert.cpp:707:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
../../avs_core/filters/overlay/444convert.cpp:777:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
[16/27] Building CXX object avs_core/C...r/filters/overlay/blend_common.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj -c ../../avs_core/filters/overlay/blend_common.cpp
../../avs_core/filters/overlay/blend_common.cpp:105:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:149:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:388:3: error: attributes are not allowed on a function-definition
   __attribute__((__target__("sse4.1")))
   ^~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:719:3: error: attributes are not allowed on a function-definition
   __attribute__((__target__("sse4.1")))
   ^~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:1061:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:1381:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
ninja: build stopped: subcommand failed.
[i686:$] 

After moving the target declarations above the definitions for only those in 444convert.cpp and blend_common.cpp:

[i686:$] ninja
[2/14] Building CXX object avs_core/CM...r/filters/overlay/blend_common.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj -c ../../avs_core/filters/overlay/blend_common.cpp
In file included from ../../avs_core/filters/overlay/blend_common.cpp:44:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h: In function 'void overlay_blend_sse41_plane_masked(BYTE*, const BYTE*, const BYTE*, int, int, int, int, int) [with pixel_t = unsigned char; int bits_per_pixel = 8]':
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:179:1: error: inlining failed in call to always_inline '__m128i _mm_blendv_epi8(__m128i, __m128i, __m128i)': target specific option mismatch
 _mm_blendv_epi8 (__m128i __X, __m128i __Y, __m128i __M)
 ^~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:436:33: note: called from here
         result = _mm_blendv_epi8(result, dst, mask_00); // ensure that zero mask value returns dst
                  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/overlay/blend_common.cpp:44:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:179:1: error: inlining failed in call to always_inline '__m128i _mm_blendv_epi8(__m128i, __m128i, __m128i)': target specific option mismatch
 _mm_blendv_epi8 (__m128i __X, __m128i __Y, __m128i __M)
 ^~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:436:33: note: called from here
         result = _mm_blendv_epi8(result, dst, mask_00); // ensure that zero mask value returns dst
                  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/overlay/blend_common.cpp:44:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:179:1: error: inlining failed in call to always_inline '__m128i _mm_blendv_epi8(__m128i, __m128i, __m128i)': target specific option mismatch
 _mm_blendv_epi8 (__m128i __X, __m128i __Y, __m128i __M)
 ^~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:439:33: note: called from here
         result = _mm_blendv_epi8(result, src, mask_FF); // ensure that max mask value returns src
                  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/overlay/blend_common.cpp:44:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:179:1: error: inlining failed in call to always_inline '__m128i _mm_blendv_epi8(__m128i, __m128i, __m128i)': target specific option mismatch
 _mm_blendv_epi8 (__m128i __X, __m128i __Y, __m128i __M)
 ^~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:439:33: note: called from here
         result = _mm_blendv_epi8(result, src, mask_FF); // ensure that max mask value returns src
                  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
[3/14] Building CXX object avs_core/CM.../AvsCore.dir/filters/planeswap.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/filters/planeswap.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/filters/planeswap.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/filters/planeswap.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/filters/planeswap.cpp.obj -c ../../avs_core/filters/planeswap.cpp
../../avs_core/filters/planeswap.cpp:106:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("ssse3")))
 ^~~~~~~~~~~~~
[5/14] Building CXX object avs_core/CM...s/AvsCore.dir/filters/resample.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj -c ../../avs_core/filters/resample.cpp
../../avs_core/filters/resample.cpp: In function 'void resize_v_sse41_planar(BYTE*, const BYTE*, int, int, ResamplingProgram*, int, int, int, const int*, const void*)':
../../avs_core/filters/resample.cpp:413:47: error: invalid conversion from 'const __m128i*' {aka 'const __vector(2) long long int*'} to '__m128i*' {aka '__vector(2) long long int*'} [-fpermissive]
         __m128i src_p = _mm_stream_load_si128(reinterpret_cast<const __m128i*>(src2_ptr));
                                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/resample.cpp:50:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:582:33: note:   initializing argument 1 of '__m128i _mm_stream_load_si128(__m128i*)'
 _mm_stream_load_si128 (__m128i *__X)
                        ~~~~~~~~~^~~
../../avs_core/filters/resample.cpp: At global scope:
../../avs_core/filters/resample.cpp:461:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("ssse3")))
 ^~~~~~~~~~~~~
../../avs_core/filters/resample.cpp:709:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("ssse3")))
 ^~~~~~~~~~~~~
../../avs_core/filters/resample.cpp:903:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("ssse3")))
 ^~~~~~~~~~~~~
../../avs_core/filters/resample.cpp:979:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
../../avs_core/filters/resample.cpp:1055:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("ssse3")))
 ^~~~~~~~~~~~~
../../avs_core/filters/resample.cpp:1071:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
../../avs_core/filters/resample.cpp:1219:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
../../avs_core/filters/resample.cpp:1420:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("sse4.1")))
 ^~~~~~~~~~~~~
../../avs_core/filters/resample.cpp:1643:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("ssse3")))
 ^~~~~~~~~~~~~
../../avs_core/filters/resample.cpp:1727:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("ssse3")))
 ^~~~~~~~~~~~~
[7/14] Building CXX object avs_core/CM...Core.dir/filters/resample_avx2.cpp.obj
ninja: build stopped: subcommand failed.
[2]+  Done                    leafpad ../../avs_core/filters/overlay/blend_common.cpp
[i686:$] 

After moving the target declarations above the definitions for only those in planeswap.cpp and resample.cpp:

[i686:$] ninja
[2/11] Building CXX object avs_core/CM...r/filters/overlay/blend_common.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj -c ../../avs_core/filters/overlay/blend_common.cpp
In file included from ../../avs_core/filters/overlay/blend_common.cpp:44:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h: In function 'void overlay_blend_sse41_plane_masked(BYTE*, const BYTE*, const BYTE*, int, int, int, int, int) [with pixel_t = unsigned char; int bits_per_pixel = 8]':
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:179:1: error: inlining failed in call to always_inline '__m128i _mm_blendv_epi8(__m128i, __m128i, __m128i)': target specific option mismatch
 _mm_blendv_epi8 (__m128i __X, __m128i __Y, __m128i __M)
 ^~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:436:33: note: called from here
         result = _mm_blendv_epi8(result, dst, mask_00); // ensure that zero mask value returns dst
                  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/overlay/blend_common.cpp:44:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:179:1: error: inlining failed in call to always_inline '__m128i _mm_blendv_epi8(__m128i, __m128i, __m128i)': target specific option mismatch
 _mm_blendv_epi8 (__m128i __X, __m128i __Y, __m128i __M)
 ^~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:436:33: note: called from here
         result = _mm_blendv_epi8(result, dst, mask_00); // ensure that zero mask value returns dst
                  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/overlay/blend_common.cpp:44:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:179:1: error: inlining failed in call to always_inline '__m128i _mm_blendv_epi8(__m128i, __m128i, __m128i)': target specific option mismatch
 _mm_blendv_epi8 (__m128i __X, __m128i __Y, __m128i __M)
 ^~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:439:33: note: called from here
         result = _mm_blendv_epi8(result, src, mask_FF); // ensure that max mask value returns src
                  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/overlay/blend_common.cpp:44:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:179:1: error: inlining failed in call to always_inline '__m128i _mm_blendv_epi8(__m128i, __m128i, __m128i)': target specific option mismatch
 _mm_blendv_epi8 (__m128i __X, __m128i __Y, __m128i __M)
 ^~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:439:33: note: called from here
         result = _mm_blendv_epi8(result, src, mask_FF); // ensure that max mask value returns src
                  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
[6/11] Building CXX object avs_core/CM...s/AvsCore.dir/filters/resample.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj -c ../../avs_core/filters/resample.cpp
../../avs_core/filters/resample.cpp: In function 'void resize_v_sse41_planar(BYTE*, const BYTE*, int, int, ResamplingProgram*, int, int, int, const int*, const void*)':
../../avs_core/filters/resample.cpp:413:47: error: invalid conversion from 'const __m128i*' {aka 'const __vector(2) long long int*'} to '__m128i*' {aka '__vector(2) long long int*'} [-fpermissive]
         __m128i src_p = _mm_stream_load_si128(reinterpret_cast<const __m128i*>(src2_ptr));
                                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/resample.cpp:50:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:582:33: note:   initializing argument 1 of '__m128i _mm_stream_load_si128(__m128i*)'
 _mm_stream_load_si128 (__m128i *__X)
                        ~~~~~~~~~^~~
[7/11] Building CXX object avs_core/CM...les/AvsCore.dir/filters/source.cpp.obj
ninja: build stopped: subcommand failed.
[2]+  Done                    leafpad ../../avs_core/filters/resample.cpp
[i686:$] 

Successive runs of ninja will continue building other files while still erroring on unfixed sources:

[i686:$] ninja
[2/7] Building CXX object avs_core/CMa...r/filters/overlay/blend_common.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj -c ../../avs_core/filters/overlay/blend_common.cpp
In file included from ../../avs_core/filters/overlay/blend_common.cpp:44:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h: In function 'void overlay_blend_sse41_plane_masked(BYTE*, const BYTE*, const BYTE*, int, int, int, int, int) [with pixel_t = unsigned char; int bits_per_pixel = 8]':
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:179:1: error: inlining failed in call to always_inline '__m128i _mm_blendv_epi8(__m128i, __m128i, __m128i)': target specific option mismatch
 _mm_blendv_epi8 (__m128i __X, __m128i __Y, __m128i __M)
 ^~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:436:33: note: called from here
         result = _mm_blendv_epi8(result, dst, mask_00); // ensure that zero mask value returns dst
                  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/overlay/blend_common.cpp:44:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:179:1: error: inlining failed in call to always_inline '__m128i _mm_blendv_epi8(__m128i, __m128i, __m128i)': target specific option mismatch
 _mm_blendv_epi8 (__m128i __X, __m128i __Y, __m128i __M)
 ^~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:436:33: note: called from here
         result = _mm_blendv_epi8(result, dst, mask_00); // ensure that zero mask value returns dst
                  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/overlay/blend_common.cpp:44:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:179:1: error: inlining failed in call to always_inline '__m128i _mm_blendv_epi8(__m128i, __m128i, __m128i)': target specific option mismatch
 _mm_blendv_epi8 (__m128i __X, __m128i __Y, __m128i __M)
 ^~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:439:33: note: called from here
         result = _mm_blendv_epi8(result, src, mask_FF); // ensure that max mask value returns src
                  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/overlay/blend_common.cpp:44:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:179:1: error: inlining failed in call to always_inline '__m128i _mm_blendv_epi8(__m128i, __m128i, __m128i)': target specific option mismatch
 _mm_blendv_epi8 (__m128i __X, __m128i __Y, __m128i __M)
 ^~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:439:33: note: called from here
         result = _mm_blendv_epi8(result, src, mask_FF); // ensure that max mask value returns src
                  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
[3/7] Building CXX object avs_core/CMa...Files/AvsCore.dir/filters/turn.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/filters/turn.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/filters/turn.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/filters/turn.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/filters/turn.cpp.obj -c ../../avs_core/filters/turn.cpp
../../avs_core/filters/turn.cpp:540:1: error: attributes are not allowed on a function-definition
 __attribute__((__target__("ssse3")))
 ^~~~~~~~~~~~~
[5/7] Building CXX object avs_core/CMa...s/AvsCore.dir/filters/resample.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj -c ../../avs_core/filters/resample.cpp
../../avs_core/filters/resample.cpp: In function 'void resize_v_sse41_planar(BYTE*, const BYTE*, int, int, ResamplingProgram*, int, int, int, const int*, const void*)':
../../avs_core/filters/resample.cpp:413:47: error: invalid conversion from 'const __m128i*' {aka 'const __vector(2) long long int*'} to '__m128i*' {aka '__vector(2) long long int*'} [-fpermissive]
         __m128i src_p = _mm_stream_load_si128(reinterpret_cast<const __m128i*>(src2_ptr));
                                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/resample.cpp:50:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:582:33: note:   initializing argument 1 of '__m128i _mm_stream_load_si128(__m128i*)'
 _mm_stream_load_si128 (__m128i *__X)
                        ~~~~~~~~~^~~
[6/7] Building CXX object avs_core/CMa...sCore.dir/filters/text-overlay.cpp.obj
ninja: build stopped: subcommand failed.
[i686:$] 

After moving the target declarations above the definitions for only those in turn.cpp:

[i686:$] ninja
[2/5] Building CXX object avs_core/CMa...r/filters/overlay/blend_common.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj -c ../../avs_core/filters/overlay/blend_common.cpp
In file included from ../../avs_core/filters/overlay/blend_common.cpp:44:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h: In function 'void overlay_blend_sse41_plane_masked(BYTE*, const BYTE*, const BYTE*, int, int, int, int, int) [with pixel_t = unsigned char; int bits_per_pixel = 8]':
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:179:1: error: inlining failed in call to always_inline '__m128i _mm_blendv_epi8(__m128i, __m128i, __m128i)': target specific option mismatch
 _mm_blendv_epi8 (__m128i __X, __m128i __Y, __m128i __M)
 ^~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:436:33: note: called from here
         result = _mm_blendv_epi8(result, dst, mask_00); // ensure that zero mask value returns dst
                  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/overlay/blend_common.cpp:44:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:179:1: error: inlining failed in call to always_inline '__m128i _mm_blendv_epi8(__m128i, __m128i, __m128i)': target specific option mismatch
 _mm_blendv_epi8 (__m128i __X, __m128i __Y, __m128i __M)
 ^~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:436:33: note: called from here
         result = _mm_blendv_epi8(result, dst, mask_00); // ensure that zero mask value returns dst
                  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/overlay/blend_common.cpp:44:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:179:1: error: inlining failed in call to always_inline '__m128i _mm_blendv_epi8(__m128i, __m128i, __m128i)': target specific option mismatch
 _mm_blendv_epi8 (__m128i __X, __m128i __Y, __m128i __M)
 ^~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:439:33: note: called from here
         result = _mm_blendv_epi8(result, src, mask_FF); // ensure that max mask value returns src
                  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/overlay/blend_common.cpp:44:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:179:1: error: inlining failed in call to always_inline '__m128i _mm_blendv_epi8(__m128i, __m128i, __m128i)': target specific option mismatch
 _mm_blendv_epi8 (__m128i __X, __m128i __Y, __m128i __M)
 ^~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:439:33: note: called from here
         result = _mm_blendv_epi8(result, src, mask_FF); // ensure that max mask value returns src
                  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
[4/5] Building CXX object avs_core/CMa...s/AvsCore.dir/filters/resample.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj -c ../../avs_core/filters/resample.cpp
../../avs_core/filters/resample.cpp: In function 'void resize_v_sse41_planar(BYTE*, const BYTE*, int, int, ResamplingProgram*, int, int, int, const int*, const void*)':
../../avs_core/filters/resample.cpp:413:47: error: invalid conversion from 'const __m128i*' {aka 'const __vector(2) long long int*'} to '__m128i*' {aka '__vector(2) long long int*'} [-fpermissive]
         __m128i src_p = _mm_stream_load_si128(reinterpret_cast<const __m128i*>(src2_ptr));
                                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/resample.cpp:50:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:582:33: note:   initializing argument 1 of '__m128i _mm_stream_load_si128(__m128i*)'
 _mm_stream_load_si128 (__m128i *__X)
                        ~~~~~~~~~^~~
ninja: build stopped: subcommand failed.
[i686:$] 

Successive runs:

[i686:$] ninja
[2/4] Building CXX object avs_core/CMa...r/filters/overlay/blend_common.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/filters/overlay/blend_common.cpp.obj -c ../../avs_core/filters/overlay/blend_common.cpp
In file included from ../../avs_core/filters/overlay/blend_common.cpp:44:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h: In function 'void overlay_blend_sse41_plane_masked(BYTE*, const BYTE*, const BYTE*, int, int, int, int, int) [with pixel_t = unsigned char; int bits_per_pixel = 8]':
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:179:1: error: inlining failed in call to always_inline '__m128i _mm_blendv_epi8(__m128i, __m128i, __m128i)': target specific option mismatch
 _mm_blendv_epi8 (__m128i __X, __m128i __Y, __m128i __M)
 ^~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:436:33: note: called from here
         result = _mm_blendv_epi8(result, dst, mask_00); // ensure that zero mask value returns dst
                  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/overlay/blend_common.cpp:44:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:179:1: error: inlining failed in call to always_inline '__m128i _mm_blendv_epi8(__m128i, __m128i, __m128i)': target specific option mismatch
 _mm_blendv_epi8 (__m128i __X, __m128i __Y, __m128i __M)
 ^~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:436:33: note: called from here
         result = _mm_blendv_epi8(result, dst, mask_00); // ensure that zero mask value returns dst
                  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/overlay/blend_common.cpp:44:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:179:1: error: inlining failed in call to always_inline '__m128i _mm_blendv_epi8(__m128i, __m128i, __m128i)': target specific option mismatch
 _mm_blendv_epi8 (__m128i __X, __m128i __Y, __m128i __M)
 ^~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:439:33: note: called from here
         result = _mm_blendv_epi8(result, src, mask_FF); // ensure that max mask value returns src
                  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/overlay/blend_common.cpp:44:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:179:1: error: inlining failed in call to always_inline '__m128i _mm_blendv_epi8(__m128i, __m128i, __m128i)': target specific option mismatch
 _mm_blendv_epi8 (__m128i __X, __m128i __Y, __m128i __M)
 ^~~~~~~~~~~~~~~
../../avs_core/filters/overlay/blend_common.cpp:439:33: note: called from here
         result = _mm_blendv_epi8(result, src, mask_FF); // ensure that max mask value returns src
                  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
[3/4] Building CXX object avs_core/CMa...s/AvsCore.dir/filters/resample.cpp.obj
FAILED: avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj 
/usr/bin/x86_64-w64-mingw32-g++  -DAvsCore_EXPORTS -DBUILDING_AVSCORE -I../../avs_core/include -Iavs_core -m32 -std=c++17 -MD -MT avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj -MF avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj.d -o avs_core/CMakeFiles/AvsCore.dir/filters/resample.cpp.obj -c ../../avs_core/filters/resample.cpp
../../avs_core/filters/resample.cpp: In function 'void resize_v_sse41_planar(BYTE*, const BYTE*, int, int, ResamplingProgram*, int, int, int, const int*, const void*)':
../../avs_core/filters/resample.cpp:413:47: error: invalid conversion from 'const __m128i*' {aka 'const __vector(2) long long int*'} to '__m128i*' {aka '__vector(2) long long int*'} [-fpermissive]
         __m128i src_p = _mm_stream_load_si128(reinterpret_cast<const __m128i*>(src2_ptr));
                                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../avs_core/filters/resample.cpp:50:
/usr/lib/gcc/x86_64-w64-mingw32/8.3.0/include/smmintrin.h:582:33: note:   initializing argument 1 of '__m128i _mm_stream_load_si128(__m128i*)'
 _mm_stream_load_si128 (__m128i *__X)
                        ~~~~~~~~~^~~
ninja: build stopped: subcommand failed.
[i686:$] 

And that's it.