Errors in CMakeLists when using c++20 modules

[gibberishCode]

Xmake Version

v2.8.1+master.beafb2d5c

Operating System Version and Architecture

Ubuntu 22.04.3 LTS

Describe Bug

When generating CMakeLists while using c++ 20 modules with gcc-13
The part in cmake responsible for compiling modules will not set appropriate flags, and will not propagate target flags like -g.

Expected Behavior

Correctly set flags

Project Configuration

add_rules("mode.debug", "mode.release")

target("modules_test")
    set_kind("binary")
    set_languages("c++23")
    add_cxxflags("gcc::-fmodules-ts")
    add_files("src/*.cpp", "src/*.ixx")
    add_files("engine/*.ixx")

I use gcc-13

Additional Information and Error Logs

Example of an error
note: C++20 ‘module’ only available with ‘-fmodules-ts’
warning: keyword ‘export’ is deprecated, and is ignored

I fixed it in my local copy of xmake with very dirty hack like so
This from cmakelists.lua 96x lines
`
for _, cmd in ipairs(cmds) do

        local command = _get_command_string(cmd, outputdir)
        
        if command then
        
            if string.find(command, "g++") then
            
                cmakelists:print("    COMMAND %s -fmodules-ts", command)
                
            else
            
                cmakelists:print("    COMMAND %s ", command)
                
            end
        end
    end

`

[waruqi]

duplicate. see #3642

[gibberishCode]

Okay so for now use Vs code and compile commands + clanagd
Cmake generation is not supported yet

[waruqi]

try it again. xmake update -s dev #4746

and please update cmake to >= 3.28.0