Detect native source files.

src/base/oven.lua

@@ -678,7 +678,7 @@
 
 			-- Only consider sources that actually generate object files
 
-			if not path.iscppfile(file.abspath) then
+			if not path.isnativefile(file.abspath) then
 				return
 			end
 

src/base/path.lua

@@ -142,17 +142,31 @@
 
 
 --
--- Returns true if the filename represents a C/C++ source code file. This check
--- is used to prevent passing non-code files to the compiler in makefiles. It is
--- not foolproof, but it has held up well. I'm open to better suggestions.
+-- Returns true if the filename represents various source languages.
 --
 
+	function path.isasmfile(fname)
+		return path.hasextension(fname, { ".s" })
+	end
+
 	function path.iscfile(fname)
-		return path.hasextension(fname, { ".c", ".s", ".m" })
+		return path.hasextension(fname, { ".c" })
+			or path.isasmfile(fname)	-- is this really right?
+			or path.isobjcfile(fname)	-- there is code that depends on this behaviour, which would need to change
 	end
 
 	function path.iscppfile(fname)
-		return path.hasextension(fname, { ".cc", ".cpp", ".cxx", ".c", ".s", ".m", ".mm" })
+		return path.hasextension(fname, { ".cc", ".cpp", ".cxx" })
+			or path.isobjcppfile(fname)	-- is this really right?
+			or path.iscfile(fname)
+	end
+
+	function path.isobjcfile(fname)
+		return path.hasextension(fname, { ".m" })
+	end
+
+	function path.isobjcppfile(fname)
+		return path.hasextension(fname, { ".mm" })
 	end
 
 	function path.iscppheader(fname)
@@ -160,6 +174,21 @@
 	end
 
 
+--
+-- Returns true if the filename represents a native language source file.
+-- These checks are used to prevent passing non-code files to the compiler
+-- in makefiles. It is not foolproof, but it has held up well. I'm open to
+-- better suggestions.
+--
+
+	function path.isnativefile(fname)
+		return path.iscfile(fname)
+			or path.iscppfile(fname)
+			or path.isasmfile(fname)
+			or path.isobjcfile(fname)
+			or path.isobjcppfile(fname)
+	end
+
 
 --
 -- Returns true if the filename represents an OS X framework.