Rename macosmenubar.m to .mm to avoid getting compiled as Objective-C and not Objective-C++.

premake4.lua

@@ -1616,7 +1616,7 @@ solution "eepp"
 		language "C++"
 		set_targetdir("libs/" .. os.get_real() .. "/")
 		includedirs { "include", "src" }
-		files { "src/eepp/ui/platform/macos/macosmenubar.m" }
+		files { "src/eepp/ui/platform/macos/macosmenubar.mm" }
 		buildoptions { "-x objective-c++" }
 		if not is_vs() then
 			buildoptions{ "-std=c++20" }

premake5.lua

@@ -1658,7 +1658,7 @@ workspace "eepp"
 		language "C++"
 		cppdialect "C++20"
 		incdirs { "include", "src" }
-		files { "src/eepp/ui/platform/macos/macosmenubar.m" }
+		files { "src/eepp/ui/platform/macos/macosmenubar.mm" }
 		buildoptions { "-x objective-c++" }
 		build_base_cpp_configuration( "eepp-macos-helper" )
 		target_dir_lib( "" )

projects/macos/ee.files

@@ -1183,7 +1183,7 @@
 ../../src/eepp/ui/uimenubar.cpp
 ../../src/eepp/ui/platformmenubar.hpp
 ../../src/eepp/ui/platformmenubar.cpp
-../../src/eepp/ui/platform/macos/macosmenubar.m
+../../src/eepp/ui/platform/macos/macosmenubar.mm
 ../../src/eepp/ui/uimenucheckbox.cpp
 ../../src/eepp/ui/uimenu.cpp
 ../../src/eepp/ui/uimenuitem.cpp