use gcc for wasm

Author: waruqi

xmake/modules/package/manager/conan/v2/install_package.lua

@@ -199,11 +199,10 @@ function _conan_generate_compiler_profile(profile, configs, opt)
         local emscripten_cmakefile = find_file("Emscripten.cmake", path.join(emsdk.emscripten, "cmake/Modules/Platform"))
         assert(emscripten_cmakefile, "Emscripten.cmake not found!")
 
-        profile:print("compiler=clang")
-        local version = _conan_get_compiler_version("clang")
-        if version then
-            profile:print("compiler.version=" .. version)
-        end
+        profile:print("compiler=gcc")
+        profile:print("compiler.cppstd=gnu17")
+        profile:print("compiler.libcxx=libstdc++11")
+        profile:print("compiler.version=12")
 
         conf = {}
         conf["tools.build:compiler_executables"] = "{'c':'emcc', 'cpp':'em++', 'ar':'emar', 'ranlib':'emranlib'}"