https://bugs.kde.org/show_bug.cgi?id=399310

            Bug ID: 399310
           Summary: Krita fails to build with Clang-7
           Product: krita
           Version: 4.1.3
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: General
          Assignee: krita-bugs-n...@kde.org
          Reporter: krzysio.ku...@wp.pl
  Target Milestone: ---

SUMMARY
fails when building:
libs/pigment/compositeops/KoOptimizedCompositeOpFactory.cpp
With error 

In file included from
../libs/pigment/compositeops/KoOptimizedCompositeOpFactory.cpp:20:
In file included from
../libs/pigment/compositeops/KoOptimizedCompositeOpFactoryPerArch.h:24:
In file included from
../libs/pigment/compositeops/KoVcMultiArchBuildSupport.h:39:
In file included from /usr/include/Vc/Vc:30:
In file included from /usr/include/Vc/vector.h:35:
In file included from /usr/include/Vc/avx/vector.h:32:
In file included from /usr/include/Vc/scalar/../common/../avx/casts.h:33:
In file included from
/usr/include/Vc/scalar/../common/../avx/../sse/casts.h:31:
/usr/include/Vc/scalar/../common/../sse/intrinsics.h:601:13: error: argument to
'__builtin_ia32_vec_ext_v4sf' must be a constant integer
            _MM_EXTRACT_FLOAT(f, v, i);
            ^~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/local/lib/clang/7.0.0/include/smmintrin.h:890:11: note: expanded from
macro '_MM_EXTRACT_FLOAT'
  { (D) = __builtin_ia32_vec_ext_v4sf((__v4sf)(__m128)(X), (int)(N)); }
          ^                                                ~~~~~~~~


STEPS TO REPRODUCE
1. Set up compilation with clang and clang++ as compilators
2. Attempt to compile the project

OBSERVED RESULT
The build fails

EXPECTED RESULT
The build succeeds

SOFTWARE VERSIONS
(available in About System)
KDE Plasma Version: 5.12.7
KDE Frameworks Version: 5.47
Qt Version: 5.9.5

ADDITIONAL INFORMATION
LLVM 7 toolchain compiled from source

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