wxWidgets 3.1.0 building with clang

[romikforest]

I very need to build wxWidgets with clang on Windows for my current project, and I've build wxWidgets 3.0.3 and 3.1.0 on with native clang llvm 5.0.0, using mingw-w64 7.2.0, 64 bit, seh, posix threads standard library and tools (x86_64-w64-windows-gnu target). Samples are working. But I'm unable to link dll's except the main one. So I can't build opengl dll in monolithic shared build and all dlls with MONOLITHIC=0. There are some errors with headers/precompiled headers. While compiling I have many redeclared inline; 'dllimport' attribute ignored warnings like:

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    In file included from ../../src/xrc/xmlreshandler.cpp:18:
    In file included from ..\..\include\wx/xrc/xmlreshandler.h:22:
    In file included from ..\..\include\wx/window.h:18:
    ..\..\include\wx/event.h:3750:35: warning: 'wxObjectEventFunctor::operator()' redeclared inline; 'dllimport' attribute ignored [-Wignored-attributes]
    inline void wxObjectEventFunctor::operator()(wxEvtHandler *handler, wxEvent& event)

and then linker undefined reference errors like:

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     clang_mswuddll-forest\coredll_appcmn.o:(.rdata[_ZTV12wxAppConsole]+0x1e0): undefined reference to `non-virtual thunk to wxAppConsoleBase::FilterEvent(wxEvent&)'

In case of monolithic build I had warnings in compilation stage only in file src/common/glcmn.cpp, so I had builded a library with command like:

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    mingw32-make.exe -f makefile.gcc MONOLITHIC=1 SHARED=1 BUILD=debug USE_OPENGL=0 CFLAGS=" -Wno-inconsistent-missing-override -Wno-shift-negative-value -Wno-unused-command-line-argument " CXXFLAGS=" -Wno-inconsistent-missing-override -Wno-shift-negative-value -Wno-unused-command-line-argument -fexceptions -fasynchronous-unwind-tables -fnon-call-exceptions -std=gnu++11 -pthread " LDFLAGS=" -Wno-unused-command-line-argument -fexceptions -fasynchronous-unwind-tables -fnon-call-exceptions -pthread -Wl,--allow-multiple-definition "  CC="clang -target x86_64-w64-windows-gnu" CXX="clang++ -target x86_64-w64-windows-gnu"

I had patched only two files while building wxWidgets 3.1.0 vesrion to avoid errors: include/wx/msw/private.h and src/msw/mediactrl_am.cpp
In src/msw/mediactrl_am.cpp I had changed the constant in case:

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    case -609: // readystatechange in IActiveMovie2 and IMediaPlayer

and in include/wx/msw/private.h I changed lines with errors:

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    // close the handle in the class dtor
    //template <wxUIntPtr INVALID_VALUE = (wxUIntPtr)INVALID_HANDLE_VALUE>
    template <wxUIntPtr INVALID_VALUE = (wxUIntPtr)-1>
    class AutoHANDLE

and:

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    static HANDLE InvalidHandle()
    {
        //return static_cast<HANDLE>(INVALID_VALUE);
        return reinterpret_cast<HANDLE>(INVALID_VALUE);
    }

For wxWidgets 3.0.3 I've patched mediactrl_am.cpp and also used the patch https://github.com/wxWidgets/wxWidgets/ ... 11237e38f6

It is very difficult to me to install tools like MSYS2 on my job, so I would like to avoid using configure.

Is there way to repair wxWidgets dlls building with clang in my case?

[ONEEYEMAN]

Hi,
You have 2 contradicting statements:

1. "Samples are working."
2. "I'm unable to link dll's except the main one.".

Are you able to build and execute the dll sample?

Thank you.

[romikforest]

I've builded samples with static libraries (default). And I test my project now using SHARED=0.
I've builded MONOLITHIC=1 SHARED=1 wxWidgets without opengl and the dialog sample with them, and it works.

I can't build MONOLITHIC=0 SHARED=1 at all.

[ONEEYEMAN]

Hi,
But if static build works - what else do you need.
Can you build and run the project using that configuration?
It is de-facto standard on Windows.

Thank you.