Add basic support for the 'Utility' kind in gmake

src/actions/make/_make.lua

@@ -20,7 +20,7 @@
 		shortname       = "GNU Make",
 		description     = "Generate GNU makefiles for POSIX, MinGW, and Cygwin",
 
-		valid_kinds     = { "ConsoleApp", "WindowedApp", "StaticLib", "SharedLib" },
+		valid_kinds     = { "ConsoleApp", "WindowedApp", "StaticLib", "SharedLib", "Utility" },
 
 		valid_languages = { "C", "C++", "C#" },
 

src/actions/make/make_cpp.lua

@@ -434,6 +434,9 @@
 			else
 				_p('  LINKCMD = $(AR) -rcs "$@" $(OBJECTS)')
 			end
+		elseif cfg.kind == premake.UTILITY then
+			-- Empty LINKCMD for Utility (only custom build rules)
+			_p('  LINKCMD =')
 		else
 			-- this was $(TARGET) $(LDFLAGS) $(OBJECTS)
 			--   but had trouble linking to certain static libs; $(OBJECTS) moved up