Wt

When trying the build Wt 4.10.1 with Visual Studio 2022 (MSVC 19.33) I have the follow error:

  wtdbomysql.vcxproj -> C:\temp\Wt\Dbo\backend\Release\wtdbomysql.lib
  Building Custom Rule C:/temp/Wt/Dbo/backend/CMakeLists.txt
  Postgres.C
C:\temp\Wt\Dbo\backend\Postgres.C(123,26): error C2079: 'buf' uses undefined class 'std::array<char,30>' [C:\Users\uilia\.conan2\p\b\wt96dc29e19fdc7\b\build\src\Wt\Dbo\backend\wtdbopostgres.vcxproj]
C:\temp\backend\Postgres.C(124,63): error C2661: 'std::to_chars': no overloaded function takes 2 arguments [C:\Users\uilia\.conan2\p\b\wt96dc29e19fdc7\b\build\src\Wt\Dbo\backend\wtdbopostgres.vcxproj]
C:\temp\backend\Postgres.C(126,8): error C3536: 'returnValue': cannot be used before it is initialized [C:\Users\uilia\.conan2\p\b\wt96dc29e19fdc7\b\build\src\Wt\Dbo\backend\wtdbopostgres.vcxproj]
C:temp\Wt\Dbo\backend\Postgres.C(148,26): error C2079: 'buf' uses undefined class 'std::array<char,30>' [C:\Users\uilia\.conan2\p\b\wt96dc29e19fdc7\b\build\src\Wt\Dbo\backend\wtdbopostgres.vcxproj]
C:\temp\Wt\Dbo\backend\Postgres.C(149,63): error C2661: 'std::to_chars': no overloaded function takes 2 arguments [C:\Users\uilia\.conan2\p\b\wt96dc29e19fdc7\b\build\src\Wt\Dbo\backend\wtdbopostgres.vcxproj]
C:\temp\Wt\Dbo\backend\Postgres.C(151,8): error C3536: 'returnValue': cannot be used before it is initialized [C:\Users\uilia\.conan2\p\b\wt96dc29e19fdc7\b\build\src\Wt\Dbo\backend\wtdbopostgres.vcxproj]

I found a related change here: https://github.com/emweb/wt/commit/7956a40c736aae9c5be87ed68d19e2b00bb81bc2

It seems like when building with Visual Studio, it found std::to_chars, but does no match with the expected interface.

Same version I can build both on Linux and Mac, only Windows + Visual Studio I having that error.

About the configuration that I used:

arch=x86_64
build_type=Release
compiler=msvc
compiler_version=19.33
runtime=dynamic (MD)
os=Windows

I'm using a toolchain file to configure the build, so here is the current CMake configuration:

set(CMAKE_BUILD_TYPE Release)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_MSVC_RUNTIME_LIBRARY "$<$<CONFIG:Release>:MultiThreadedDLL>")
set(BUILD_SHARED_LIBS OFF)
set(SHARED_LIBS OFF)
set(BUILD_EXAMPLES OFF)
set(BUILD_TESTS OFF)
set(ENABLE_SSL ON)
set(ENABLE_HARU OFF)
set(ENABLE_PANGO OFF)
set(ENABLE_SQLITE ON)
set(ENABLE_POSTGRES ON)
set(ENABLE_FIREBIRD OFF)
set(ENABLE_MYSQL ON)
set(ENABLE_MSSQLSERVER OFF)
set(ENABLE_QT4 OFF)
set(ENABLE_QT5 OFF)
set(ENABLE_LIBWTTEST OFF)
set(ENABLE_LIBWTDBO ON)
set(ENABLE_OPENGL OFF)
set(ENABLE_UNWIND OFF)
set(WT_NO_STD_LOCALE OFF)
set(WT_NO_STD_WSTRING OFF)
set(MULTI_THREADED ON)
set(USE_SYSTEM_SQLITE3 ON)
set(DEBUG OFF)
set(CONNECTOR_HTTP TRUE)
set(CONNECTOR_FCGI OFF)
set(CONNECTOR_ISAPI ON)
set(BOOST_DYNAMIC OFF)
set(BOOST_PREFIX ...)
set(ZLIB_PREFIX ...)
set(SSL_PREFIX ...)
set(OPENSSL_LIBRARIES ...)
set(OPENSSL_INCLUDE_DIR ...)
... Include folder and lib folders ...

Could you please check if it's a bug or just another Visual Studio limitation with C++17 features?

The full build log is attached. BTW, I'm using Conan build Wt, and so far, we had no problem building it, only this new release 4.10.1 it happens.