[Interest] Qt 5.13 QtWebEngine GN Error

[Oliver Niebuhr]

On 23/04/2019 20:56, Allan Sandfeld Jensen wrote:
> On Dienstag, 23. April 2019 19:45:14 CEST Oliver Niebuhr wrote:
>> Hi.
>>
>> I am constantly running into the following Error:
>>
>> Project MESSAGE:
>> C:\qt5srcgit\qt5\qtwebengine\src\3rdparty\gn\build\gen.py
>> --no-last-commit-position --out-path
>> C:/QtSrcx64/qtwebengine/src/3rdparty/gn/out/Release --cc "C:\Program
>> Files (x86)\Microsoft Visual
>> Studio\2019\Community\VC\Tools\MSVC\14.20.27508\bin\Hostx64\x64\cl.exe"
>> --cxx "C:\Program Files (x86)\Microsoft Visual
>> Studio\2019\Community\VC\Tools\MSVC\14.20.27508\bin\Hostx64\x64\cl.exe"
>> --ld "C:\Program Files (x86)\Microsoft Visual
>> Studio\2019\Community\VC\Tools\MSVC\14.20.27508\bin\Hostx64\x64\link.exe"
>> [1/11] CXX tools/gn/xml_element_writer.obj
>> [2/11] CXX util/sys_info.obj
>> [3/11] CXX util/semaphore.obj
>> [4/11] CXX util/ticks.obj
>> [5/11] CXX util/msg_loop.obj
>> [6/11] CXX util/exe_path.obj
>> [7/11] CXX util/worker_pool.obj
>> [8/11] CXX tools/gn/substitution_writer.obj
>> FAILED: tools/gn/substitution_writer.obj
>> ninja -t msvc -- C:\Program Files (x86)\Microsoft Visual
>> Studio\2019\Community\VC\Tools\MSVC\14.20.27508\bin\Hostx64\x64\cl.exe
>> /nologo /showIncludes /FC @tools/gn/substitution_writer.obj.rsp /c
>> C:\qt5srcgit\qt5\qtwebengine\src\3rdparty\gn\tools/gn/substitution_writer.cc
>> /Fotools/gn/substitution_writer.obj
>> C:\qt5srcgit\qt5\qtwebengine\src\3rdparty\gn\tools\gn\substitution_writer.h(
>> 91): error C2039: 'string': is not a member of 'std'
>> C:\Program Files (x86)\Microsoft Visual
>> Studio\2019\Community\VC\Tools\MSVC\14.20.27508\include\vector(19):
>> note: see declaration of 'std'
>> C:\qt5srcgit\qt5\qtwebengine\src\3rdparty\gn\tools\gn\substitution_writer.h(
>> 91): error C3646: 'ApplyPatternToSourceAsString': unknown override specifier
>> C:\qt5srcgit\qt5\qtwebengine\src\3rdparty\gn\tools\gn\substitution_writer.h
>> (92): error C2059: syntax error: 'const'
>> C:\qt5srcgit\qt5\qtwebengine\src\3rdparty\gn\tools\gn\substitution_writer.h(
>> 95): error C2238: unexpected token(s) preceding ';'
>> C:\qt5srcgit\qt5\qtwebengine\src\3rdparty\gn\tools\gn\substitution_writer.h(
>> 117): error C2039: 'string': is not a member of 'std'
>> C:\Program Files (x86)\Microsoft Visual
>> Studio\2019\Community\VC\Tools\MSVC\14.20.27508\include\vector(19):
>> note: see declaration of 'std'
>> C:\qt5srcgit\qt5\qtwebengine\src\3rdparty\gn\tools\gn\substitution_writer.h(
>> 117): error C2065: 'string': undeclared identifier
>> C:\qt5srcgit\qt5\qtwebengine\src\3rdparty\gn\tools\gn\substitution_writer.h(
>> 117): error C2923: 'std::vector': 'string' is not a valid template type
>> argument for parameter '_Ty'
>> C:\qt5srcgit\qt5\qtwebengine\src\3rdparty\gn\tools\gn\substitution_writer.h(
>> 117): error C3203: 'allocator': unspecialized class template can't be used
>> as a template argument for template parameter '_Alloc', expected a real
>> type
>> C:\qt5srcgit\qt5\qtwebengine\src\3rdparty\gn\tools\gn\substitution_writer.h
>> (137): error C2039: 'string': is not a member of 'std'
>> [...shortened here...]
>>
>> I am not sure if this is a already known Issue or if the Chromium
>> Version coming with Qt 5.13 is not compatible with VS 2019?
>>
> None of Qt WebEngine versions are compatible with VS 2019. If you had managed 
> to build GN you would have run into our hardcoded check that you are using a 
> known compatible compiler. 
> 
> You need the following changes that have gone to 5.12 first:
> 
> https://codereview.qt-project.org/259283
> https://codereview.qt-project.org/259285/
> 
> "Fortunately" most of the changes in VS 2019 were introduced gradually in VS 
> 2017, so it was only a single very minor change.
> 
> 'Allan
> 
> 
Thanks! Thats good to know. I will manually apply them and see what will
happen :)
Olli

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