Add flags for specific compilers and linkers

[waruqi]

Is your feature request related to a problem? Please describe.

Usually, we need to add specific flags in the script scope in order to determine the compiler name.

target("test")
    on_config(function (target)
         if target:has_tool("cxx", "clang") then
             target:add("cxxflags", "-stdlib=libc++")
         end
    end)

Describe the solution you'd like

Better solution1

For the same flags, we can also easily append them to different.

However, it can only be used for compilation tools and cannot be extended to other types.

add_cxxflags("clang::-stdlib=libc++")
add_cxxflags("gcc::-stdlib=libc++")

and if there are a lot of flags, it will be add_cxxflags("clang::-stdlib=libc++", "clang::xxx", "clang::yyy", "clang::zz")

Better solution2

add_cxxflags("-stdlib=libc++", {tools = "clang"})
add_cxxflags("-stdlib=libc++", {tools = "gcc"})

it will override tools, always is gcc

Other solutions

...

It will override tools, it always is gcc.

Describe alternatives you've considered

No response

Additional context

No response

[waruqi]

I have supported both solutions.

[Jeangowhy]

it doesn't work in Windows 10 MinGW GCC. Much more, flags can't cover the default value:

    add_cxxflags("-fmodules-ts", { tools = "gcc" })
    add_cxxflags("-o module-ixx", { tools = "gcc" })

C:\mingw-w64\x86_64-12.2.0-release-win32-seh-ucrt-rt_v10-rev2\bin\x86_64-w64-mingw32-g++ -c -m64 -g -O0 -std=c++20 module-ixx/hello.ixx module-ixx/world.ixx -o build\.objs\module-ixx\mingw\x86_64\debug\modules_ixx\app.cpp.obj modules_ixx\app.cpp

[adamdusty]

it doesn't work in Windows 10 MinGW GCC. Much more, flags can't cover the default value:

    add_cxxflags("-fmodules-ts", { tools = "gcc" })
    add_cxxflags("-o module-ixx", { tools = "gcc" })

C:\mingw-w64\x86_64-12.2.0-release-win32-seh-ucrt-rt_v10-rev2\bin\x86_64-w64-mingw32-g++ -c -m64 -g -O0 -std=c++20 module-ixx/hello.ixx module-ixx/world.ixx -o build\.objs\module-ixx\mingw\x86_64\debug\modules_ixx\app.cpp.obj modules_ixx\app.cpp

I'm having the same issue, and haven't found a resolution. I'm curious if it has anything to do with mingw being treated as cross compilation.

[waruqi]

tools = "gxx"

[Issues-translate-bot]

Bot detected the issue body's language is not English, translate it automatically.

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tools = "gxx"