Details
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Bug
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Resolution: Incomplete
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Not Evaluated
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6.7.3
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None
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674475887 (dev), c59649234 (6.8)
Description
Hi,
when compiling the Qt conan recipie i noticed that the CXX_STANDARD was not set correctly, i tracked it down to the flag that was set to -DFEATURE_cxx20=ON,
One way to fix it seems to be to set the -DQT_FEATURE_cxx20=on variable, but as far as i read in the code comments and documentation, users are supposed to use FEATURE_cxx20=ON.
Reproducing it on windows:
λ git clone git@github.com:qt/qtbase.git λ cd qtbase λ mkdir build λ cd build λ cmake.exe .. -DCMAKE_BUILD_TYPE=Release -G Ninja -DFEATURE_cxx20=ON -- The CXX compiler identification is MSVC 19.41.34123.0 -- The C compiler identification is MSVC 19.41.34123.0 -- The ASM compiler identification is MSVC -- Found assembler: C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.41.34120/bin/Hostx64/x64/cl.exe -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Check for working CXX compiler: C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.41.34120/bin/Hostx64/x64/cl.exe - skipped -- Detecting CXX compile features -- Detecting CXX compile features - done -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Check for working C compiler: C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.41.34120/bin/Hostx64/x64/cl.exe - skipped -- Detecting C compile features -- Detecting C compile features - done -- CMAKE_BUILD_TYPE was already explicitly set to: 'Release' -DCMAKE_C_FLAGS=/DWIN32 /D_WINDOWS -DCMAKE_C_FLAGS_DEBUG=/Zi /Ob0 /Od /RTC1 -DCMAKE_C_FLAGS_RELEASE=/O2 /Ob2 /DNDEBUG -DCMAKE_C_FLAGS_RELWITHDEBINFO=/Zi /O2 /Ob1 /DNDEBUG -DCMAKE_CXX_FLAGS=/DWIN32 /D_WINDOWS /GR /EHsc -DCMAKE_CXX_FLAGS_DEBUG=/Zi /Ob0 /Od /RTC1 -DCMAKE_CXX_FLAGS_RELEASE=/O2 /Ob2 /DNDEBUG -DCMAKE_CXX_FLAGS_RELWITHDEBINFO=/Zi /O2 /Ob1 /DNDEBUG -DCMAKE_EXE_LINKER_FLAGS=/machine:x64 -DCMAKE_C_STANDARD=11 -DCMAKE_C_STANDARD_REQUIRED=ON -DCMAKE_CXX_STANDARD=17 -DCMAKE_CXX_STANDARD_REQUIRED=ON -DCMAKE_MODULE_PATH:STRING=D:/dev/qtbase/cmake/platforms
Note the DCMAKE_CXX_STANDARD=17, i would expect that this is 20 since i set `-DFEATURE_cxx20=ON`
Thanks in Advance,
Michael Wechner
Attachments
| For Gerrit Dashboard: QTBUG-130294 | ||||||
|---|---|---|---|---|---|---|
| # | Subject | Branch | Project | Status | CR | V |
| 598395,2 | CMake: Switch message type of the architecture extraction project | dev | qt/qtbase | Status: MERGED | +2 | 0 |
| 598797,2 | CMake: Switch message type of the architecture extraction project | 6.8 | qt/qtbase | Status: MERGED | +2 | 0 |