cppdialect is ignored in my Visual Studio 2022 solution

[Jeanmilost]

In order to deploy a Visual Studio 2022 solution, I'm using the following code:

newoption {
   trigger     = "device",
   value       = "DESKTOP|HANDHELD|IOT",
   description = "target device",
   default     = "DESKTOP",
   allowed = {
      { "DESKTOP",   "Desktop machine" },
      { "HANDHELD",  "Mobile device" },
      { "IOT",       "IoT device" }
   }
}

newoption {
   trigger     = "OPENGL",
   value       = "GL|GLES",
   description = "OpenGL support",
   default     = "GL",
   allowed = {
      { "GL",   "OpenGL" },
      { "GLES",  "OpenGLES" }
   }
}

newoption {
    trigger     = "VULKAN",
    description = "VULKAN support",
}

newoption {
    trigger     = "METAL",
    description = "METAL support (MacOS/iOS)",
}

newoption {
    trigger     = "DX12",
    description = "DX12 support (Windows)",
}


SDKDIR = "sdk.js"
BUILDDIR = "build.js"

defines { 
  "SCITERJS", "SCRIPT_JS",
  "JS_STRICT_NAN_BOXING", 
  "CONFIG_BIGNUM",
  "CONFIG_UNITS",  
  "CONFIG_JSX", 
  "CONFIG_JSX_SCITER",
  "CONFIG_DEBUGGER",
  "CONFIG_STORAGE",
  "CONFIG_OBJECT_LITERAL_CALL"
}

filter { "options:VULKAN" }
  defines {"USE_VULKAN", "SK_VULKAN"}
  includedirs { "$(VK_SDK_PATH)/Include" }  

filter { "options:METAL" }
  defines {"USE_METAL", "SK_METAL"}

filter { "options:DX12" }
  defines {"USE_DX12", "SK_DIRECT3D"}

filter { "options:OPENGL=GL" }
  defines {"USE_OPENGL", "SK_GL"}

filter { "options:OPENGL=GLES" }
  defines {"USE_OPENGLES", "SK_GL"}

filter {}

MONOLITHIC = true -- by design
USE_SKIA_BY_DEFAULT = true -- only rendering option on devices
WINDOWLESS = true

defines { "WINDOWLESS", "MONOLITHIC", "SCITER_BUILD",
          "DEVICE=" .. _OPTIONS["device"] }


include "premake5-modules.lua"

configurations { "Debug", "Release" }
platforms { "x32", "x64","arm32", "arm64" } 


function osabbr() 
  return os.target()
end

filter "system:windows"
  preferredtoolarchitecture "x86_64"
  --buildoptions "-Zm200"
  defines { "NOMINMAX" }
  location(BUILDDIR .. "/" .. osabbr())  
  platforms { "x32", "x64", "arm32", "arm64" }
  --configurations { "DebugSkia", "ReleaseSkia" }
  defines { "_CRT_SECURE_NO_WARNINGS" } 
  systemversion "latest"

filter "system:macosx"
  location(BUILDDIR .. "/" .. osabbr())  
  platforms { "x64" }  
filter "system:linux"
  location(BUILDDIR .. "/" .. osabbr() .. "/" .. string.lower(_OPTIONS["device"]))
  platforms { "x64", "arm32", "arm64" }  
filter "system:android"
  location(BUILDDIR .. "/" .. osabbr())  
  platforms { "x32", "x64", "arm32", "arm64" }  
filter {}


includedirs { 
  ".",     
  "engine",
  "engine/tool",
  "engine/gool",
  "engine/html",
  "engine/external/uv/include",
  "engine/external/uv-tls/include",
  "engine/external/zlib",
  "engine/external/minizip"
}  

filter "not system:linux"
  flags { "MultiProcessorCompile" } -- does not work reliably on Linux, why?
filter{}

cppdialect "C++17"
cdialect "C99"

staticruntime "On"

filter "platforms:x32"
  architecture "x86"
filter "platforms:x64"
  architecture "x86_64" 
filter "platforms:arm32"
  architecture "ARM" 
filter "platforms:arm64"
  architecture "ARM64" 

filter {"platforms:x32", "system:windows"}
  defines { "WIN32" }
filter {"platforms:x64", "system:windows"}
  defines { "WIN32","WIN64" }      
filter {"platforms:arm64", "system:windows"}
  defines { "WIN32","WIN64","ARM64" }      
  architecture "ARM64" 

filter "configurations:Debug*"
  defines { "DEBUG", "_DEBUG" }
  symbols "On"

filter "configurations:Release*"
  defines { "NDEBUG"}  
  optimize "Full"
  -- symbols "Off"
  flags { "LinkTimeOptimization" }

filter {"system:windows"}
  defines { "_CRT_SECURE_NO_WARNINGS" } 

filter { "system:macosx", "configurations:Release*" }
  linkoptions { "-s", "-flto=full" }

filter "system:linux"
  defines { "_GNU_SOURCE" }
  buildoptions {
    "`pkg-config fontconfig --cflags`",
    "-fPIC",
    "-Wno-unknown-pragmas",
    "-Wno-write-strings",
  }
  linkoptions { 
    "-fPIC",
    "-pthread",
    "-ldl",     
  } 

filter { "system:linux", "platforms:x32 or x64" }
  buildoptions {
    "-march=nehalem",
  }

filter { "system:linux", "platforms:arm32" }
  -- rapsberry Pi 2 and above
  buildoptions {
    "-mfpu=neon",
    "-mfloat-abi=hard",
  }
  linkoptions {
    "-mfpu=neon",
    "-mfloat-abi=hard",
  }


filter { "toolset:gcc", "files:*.cpp" }
  buildoptions {
    "-fpermissive",
    "-Wno-reorder",
  }

filter "system:android"
  buildoptions { "-fexceptions" }
  --optimize "Off"


filter {}

skia_includes()


workspace "sciter.lite"

--|
--| sciter dll
--|

project "sciter.lite"
  kind "SharedLib"
  language "C++"

  defines { "SCITER_EXPORTS" }
 
  filter "system:android"
    toolset "clang"
    --optimize "Off"
    defines { "ANDROID" }

  filter{}

  targetname "sciter"

  include_files_lite()
  include_files_tool()
  include_files_uv()
  include_files_uv_tls()  
  include_files_dybase()
  include_files_gool()
  include_files_zlib()
  include_files_minizip()
  include_files_png()
  include_files_jpeg()
  include_files_webp()
  include_files_rlottie()
  include_files_html()
  include_files_http()
  include_files_tmt()
  include_files_xdomjs()
  include_files_qjs()

  if os.target() == "windows" then
    --include_files_directshow()
    include_files_d2d()
  end
  --if os.target() == "linux" then    
  --  include_files_gtk()
  --elseif os.target() == "macosx" then
  --  include_files_osx()
  --end  
  include_files_xgl_skia()
  include_files_webgl() 
  include_freetype_files()

  filter "system:windows"
    prebuildcommands { 
        "subwcrev.exe \"%{wks.location}..\\..\" \"%{wks.location}..\\..\\engine\\sciter-revision-template.h\" \"%{wks.location}..\\..\\engine\\sciter-revision.h\"",
        "\"%{wks.location}..\\..\\".. SDKDIR .. "\\bin\\windows\\packfolder.exe\" \"%{wks.location}..\\..\\engine\\res.js\" \"%{wks.location}..\\..\\engine\\master-css-resources-js.cpp\"  -v \"master_css_resources\"" }
  filter {}

  targetdir (SDKDIR .. "/bin.lite/" .. osabbr() .. "/%{cfg.platform}")


  filter "system:windows"
    links { "usp10", "ws2_32", "wininet", "windowscodecs" }
    files { 
      "engine/lite/windows/dllmain.cpp",       
      "engine/lite/windows/sciter.def", 
      "engine/lite/windows/sciter.dll.rc", 
      "engine/lite/windows/lite-d2d.cpp", 
    }

  filter "system:macosx"
    links { 
      "CoreFoundation.framework", 
      "Cocoa.framework",
      "Carbon.framework", 
      "AVFoundation.framework",
      "SystemConfiguration.framework",
      "CoreMedia.framework",
      "CoreText.framework",
      "CoreGraphics.framework",
      "CoreData.framework",
      "CoreVideo.framework",
      "IOKit.framework",
      "OpenGL.framework"
    } 

  filter "system:linux"
    linkoptions { 
       "`pkg-config fontconfig --libs`",
       "-fPIC",
       "-pthread",
       "-Wl,--no-undefined",
       "-lX11", "-lX11-xcb",
       "-ldl",
       "-latomic",
    }

  filter { "system:linux", "options:OPENGL=GL" }
    linkoptions { 
       "-lGL",
       "-lGLU"
    }
  filter { "system:linux", "options:OPENGL=GLES" }
    linkoptions { 
       "-lGL",
       "-lEGL",
       "-lGLESv2",
    }

  filter "system:android"
    buildoptions { "-Wreorder" }
    links {"GLESv2","GLESv1_CM","EGL","m"}

  filter {}  

workspace "sciter.lite.static"

project "sciter.lite.static"
  kind "StaticLib"
  language "C++"

  defines { "STATIC_LIB" }
  
  targetname "sciter.static"

  targetdir (BUILDDIR .. "/lib." .. osabbr() .."/%{cfg.platform}lite")

  includedirs { 
    "engine/tiscript/include" 
  }

  include_files_lite()
  include_files_tool()
  include_files_uv()
  include_files_uv_tls()  
  include_files_dybase()
  include_files_gool()
  include_files_zlib()
  include_files_png()
  include_files_jpeg()
  include_files_webp()
  include_files_rlottie()
  include_files_html()
  include_files_http()
  include_files_tmt()
  include_files_xdom()
  include_files_xgl_skia()      
  include_files_webgl()  
  include_freetype_files()

  filter "system:macosx"
    links { 
      "CoreFoundation.framework", 
      "Cocoa.framework",
      "Carbon.framework", 
      "AVFoundation.framework",
      "SystemConfiguration.framework",
      "CoreMedia.framework",
      "CoreText.framework",
      "CoreGraphics.framework",
      "CoreData.framework",
      "CoreVideo.framework",
      "IOKit.framework",
      "OpenGL.framework"
    } 
  filter {}  

-- include "sdk"

This code globally works well, except for the cppdialect "C++17" instruction, which is completely ignored. Indeed all my projects remain configured to <LanguageStandard>stdcpplatest</LanguageStandard> instead of <LanguageStandard>stdcpp17</LanguageStandard> after the deployment.

I already asked this question here: https://stackoverflow.com/questions/78766168/premake5-cppdialect-is-ignored-while-creating-project-for-vs2022, unfortunately it remained unresolved.

Can you please tell me what I need to change in my above code to make the cppdialect instruction to be applied during the deployment?

[samsinsane]

This code globally works well, except for the cppdialect "C++17" instruction, which is completely ignored. Indeed all my projects remain configured to <LanguageStandard>stdcpplatest</LanguageStandard> instead of <LanguageStandard>stdcpp17</LanguageStandard> after the deployment.

For VS2022, Premake will only emit stdcpplatest if cppdialect is explicitly set to "C++latest". You can see the logic here:

premake-core/modules/vstudio/vs2010_vcxproj.lua

Lines 1741 to 1753 in fa2405d

	function m.languageStandard(cfg, condition)
	if _ACTION >= "vs2017" then
	if (cfg.cppdialect == "C++14") then
	m.element("LanguageStandard", condition, 'stdcpp14')
	elseif (cfg.cppdialect == "C++17") then
	m.element("LanguageStandard", condition, 'stdcpp17')
	elseif (cfg.cppdialect == "C++20") then
	m.element("LanguageStandard", condition, iif(_ACTION == "vs2017", 'stdcpplatest', 'stdcpp20'))
	elseif (cfg.cppdialect == "C++latest") then
	m.element("LanguageStandard", condition, 'stdcpplatest')
	end
	end
	end

With just the snippet you've provided above, I can't provide much more assistance beyond recommending that you look at premake5-modules.lua and skia_includes().