X-Git-Url: http://nitlanguage.org

diff --git a/src/c_tools.nit b/src/c_tools.nit
index 5d9c634..61c1f9c 100644
--- a/src/c_tools.nit
+++ b/src/c_tools.nit
@@ -47,33 +47,37 @@ class CCompilationUnit
 	# files to compile TODO check is appropriate
 	var files = new Array[String]
 
-	fun add_local_function( efc : CFunction )
+	# Add a `static` `c_function` to be strictly local to this unit
+	fun add_local_function(c_function: CFunction)
 	do
-		body_decl.add( "{efc.signature};\n" )
-		body_impl.add( "\n" )
-		body_impl.add( efc.to_writer )
+		body_decl.add "static {c_function.signature};\n"
+		body_impl.add "\n"
+		body_impl.add c_function.to_writer
 	end
 
-	fun add_exported_function( efc : CFunction )
+	# Add a public `c_function` accessible from outside this compilation unit
+	fun add_exported_function(c_function: CFunction)
 	do
-		header_decl.add( "{efc.signature};\n" )
-		body_impl.add( "\n" )
-		body_impl.add( efc.to_writer )
+		body_decl.add "{c_function.signature};\n"
+		body_impl.add "\n"
+		body_impl.add c_function.to_writer
 	end
 
-	fun compile_header_core( stream : OStream )
+	# Write the core of the header to `stream`
+	fun compile_header_core(stream: Writer)
 	do
-		header_c_base.write_to( stream )
-		header_custom.write_to( stream )
-		header_c_types.write_to( stream )
-		header_decl.write_to( stream )
+		header_c_base.write_to stream
+		header_custom.write_to stream
+		header_c_types.write_to stream
+		header_decl.write_to stream
 	end
 
-	fun compile_body_core( stream : OStream )
+	# Write the core of the body to `stream`
+	fun compile_body_core(stream: Writer)
 	do
-		body_decl.write_to( stream )
-		body_custom.write_to( stream )
-		body_impl.write_to( stream )
+		body_decl.write_to stream
+		body_custom.write_to stream
+		body_impl.write_to stream
 	end
 end
 
@@ -98,3 +102,57 @@ class CFunction
 		return w
 	end
 end
+
+# An extern file to compile
+class ExternFile
+
+	# Filename relative to the nit-compile folder
+	var filename: String
+
+	# The name of the target in the Makefile
+	# Usually the produced .o file
+	fun makefile_rule_name: String is abstract
+
+	# The content of the rule in the make
+	# Usually the one-line shell command after the tabulation
+	fun makefile_rule_content: String is abstract
+
+	fun compiles_to_o_file: Bool do return false
+
+	# Is `self` a Java file to include in the JAR archive?
+	fun add_to_jar: Bool do return false
+
+	# Additional libraries needed for the compilation
+	# Will be used with pkg-config
+	var pkgconfigs = new Array[String]
+end
+
+# An extern C file to compile
+class ExternCFile
+	super ExternFile
+
+	# Custom options for the C compiler (CFLAGS)
+	var cflags: String
+
+	redef fun hash do return filename.hash
+	redef fun ==(o) do return o isa ExternCFile and filename == o.filename
+
+	redef fun makefile_rule_name do
+		var basename = filename.basename(".c")
+		var res = "{basename}.extern.o"
+		return res
+	end
+
+	redef fun makefile_rule_content do
+		var ff = filename.basename
+		var o = makefile_rule_name
+		var pkg = ""
+		if not pkgconfigs.is_empty then
+			pkg = "`pkg-config --cflags {pkgconfigs.join(" ")}`"
+		end
+		return "$(CC) $(CFLAGS) -Wall -Wno-unused-function {self.cflags} {pkg} -c -o {o} {ff}"
+	end
+
+	redef fun compiles_to_o_file do return true
+end
+