Bug 372659 - eigen-3.3 and ilm-base-2.2.0: "half" type collision
Summary: eigen-3.3 and ilm-base-2.2.0: "half" type collision
Status: RESOLVED UNMAINTAINED
Alias: None
Product: krita
Classification: Applications
Component: General (other bugs)
Version First Reported In: unspecified
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: Krita Bugs
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-11-19 12:49 UTC by Enno Boland
Modified: 2016-12-12 17:55 UTC (History)
2 users (show)

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Description Enno Boland 2016-11-19 12:49:08 UTC 
both eigen-3.3 (https://bitbucket.org/eigen/eigen/) and ilmbase (http://www.openexr.com/downloads.html) define a type half. When building the calligra suite, krita fails with the following error:

    ...

    Scanning dependencies of target kritanormalize
    [ 79%] Building CXX object krita/plugins/filters/normalize/CMakeFiles/kritanormalize.dir/kritanormalize_automoc.cpp.o
    [ 79%] Building CXX object krita/plugins/filters/normalize/CMakeFiles/kritanormalize.dir/kis_normalize.cpp.o
    In file included from /builddir/calligra-2.9.11/libs/pigment/KoColorSpaceMaths.h:117:0,
                     from /builddir/calligra-2.9.11/libs/pigment/KoColorSpaceTraits.h:26,
                     from /builddir/calligra-2.9.11/krita/plugins/filters/unsharp/kis_unsharp_filter.cpp:38:
    /usr/include/OpenEXR/half.h:229:64: error: reference to 'half' is ambiguous
     HALF_EXPORT std::ostream &      operator << (std::ostream &os, half  h);
                                                                    ^
    /usr/include/OpenEXR/half.h:91:7: note: candidates are: class half
     class half
           ^
    In file included from /usr/include/eigen3/Eigen/Core:386:0,
                     from /builddir/calligra-2.9.11/krita/image/kis_convolution_kernel.h:23,
                     from /builddir/calligra-2.9.11/krita/plugins/filters/unsharp/kis_unsharp_filter.cpp:25:
    /usr/include/eigen3/Eigen/src/Core/arch/CUDA/Half.h:76:8: note:                 struct Eigen::half
     struct half : public half_impl::half_base {
            ^
    In file included from /builddir/calligra-2.9.11/libs/pigment/KoColorSpaceMaths.h:117:0,
                     from /builddir/calligra-2.9.11/libs/pigment/KoColorSpaceTraits.h:26,
                     from /builddir/calligra-2.9.11/krita/plugins/filters/unsharp/kis_unsharp_filter.cpp:38:
    /usr/include/OpenEXR/half.h:229:64: error: 'half' has not been declared
     HALF_EXPORT std::ostream &      operator << (std::ostream &os, half  h);
                                                                    ^
    /usr/include/OpenEXR/half.h:230:64: error: reference to 'half' is ambiguous
     HALF_EXPORT std::istream &      operator >> (std::istream &is, half &h);
                                                                    ^
    /usr/include/OpenEXR/half.h:91:7: note: candidates are: class half
     class half
           ^
    In file included from /usr/include/eigen3/Eigen/Core:386:0,
                     from /builddir/calligra-2.9.11/krita/image/kis_convolution_kernel.h:23,
                     from /builddir/calligra-2.9.11/krita/plugins/filters/unsharp/kis_unsharp_filter.cpp:25:
    /usr/include/eigen3/Eigen/src/Core/arch/CUDA/Half.h:76:8: note:                 struct Eigen::half
     struct half : public half_impl::half_base {
            ^
    ...

With eigen-3.2 the build worked fine.

Also see https://github.com/voidlinux/void-packages/issues/5174 for the downstream Void Linux bug.
Comment 1 Halla Rempt 2016-11-19 13:12:45 UTC 
Krita 2.9 is no longer being maintained, there will be no new 2.9.x releases. Build Krita 3.0.1.1 or the latest 3.1 beta instead. If you must build Krita 2.9, build it with the appropriate library versions.
Comment 2 demm 2016-12-12 17:55:24 UTC 
Issue is the same for Krita 3.0.1.1, build fails with the same output as above when Eigen 3.3.1 is used, no such problems with Eigen 3.2.10.