diff --git a/lutin/tools.py b/lutin/tools.py
index bc6722f..f545e06 100644
--- a/lutin/tools.py
+++ b/lutin/tools.py
@@ -410,4 +410,29 @@ def get_maintainer_from_file_or_direct(path_module, filename_or_author):
 			# comment ...
 			continue
 		out.append(elem)
-	return out
\ No newline at end of file
+	return out
+
+
+
+def remove_element(data, to_remove):
+	base_data = []
+	for elem in data:
+		if type(elem) == list:
+			for elem2 in elem:
+				base_data.append(elem2)
+		else:
+			base_data.append(elem)
+	base_remove = []
+	for elem in to_remove:
+		if type(elem) == list:
+			for elem2 in elem:
+				base_remove.append(elem2)
+		else:
+			base_remove.append(elem)
+	out = []
+	for elem in base_data:
+		if elem not in base_remove:
+			out.append(elem)
+	return out;
+
+
diff --git a/lutin/z_builder/lutinBuilder_c.py b/lutin/z_builder/lutinBuilder_c.py
index 5d59344..9808699 100644
--- a/lutin/z_builder/lutinBuilder_c.py
+++ b/lutin/z_builder/lutinBuilder_c.py
@@ -85,19 +85,30 @@ def compile(file, binary, target, depancy, flags, path, name, basic_path, module
 		cmd.append(get_version_compilation_flags(flags, depancy.flags))
 	except:
 		pass
-	try:
-		cmd.append(target.global_flags["c"])
-	except:
-		pass
-	try:
-		cmd.append(depancy.flags["c"])
-	except:
-		pass
+	list_flags = [];
+	if "c" in target.global_flags:
+		list_flags.append(target.global_flags["c"])
+	if "c" in depancy.flags:
+		list_flags.append(depancy.flags["c"])
 	for view in ["local", "export"]:
-		try:
-			cmd.append(flags[view]["c"])
-		except:
-			pass
+		if view in flags:
+			if "c" in flags[view]:
+				list_flags.append(flags[view]["c"])
+	# get blacklist of flags
+	list_flags_blacklist = [];
+	if "c-remove" in target.global_flags:
+		list_flags_blacklist.append(target.global_flags["c-remove"])
+	if "c-remove" in depancy.flags:
+		list_flags_blacklist.append(depancy.flags["c-remove"])
+	for view in ["local", "export"]:
+		if view in flags:
+			if "c-remove" in flags[view]:
+				list_flags_blacklist.append(flags[view]["c-remove"])
+	# apply blacklisting of data and add it on the cmdLine
+	clean_flags = tools.remove_element(list_flags, list_flags_blacklist)
+	#debug.warning("plop " + str(list_flags_blacklist) + "       " + str(list_flags) + "  --> " + str(clean_flags) )
+	cmd.append(clean_flags);
+	
 	cmd.append("-c")
 	cmd.append("-MMD")
 	cmd.append("-MP")
diff --git a/lutin/z_builder/lutinBuilder_cpp.py b/lutin/z_builder/lutinBuilder_cpp.py
index cf91994..50dac42 100644
--- a/lutin/z_builder/lutinBuilder_cpp.py
+++ b/lutin/z_builder/lutinBuilder_cpp.py
@@ -54,12 +54,6 @@ def get_output_type():
 def get_support_multithreading():
 	return True
 
-def remove_element(data, to_remove):
-	out = []
-	for elem in data:
-		if elem not in to_remove:
-			out.append(elem)
-	return out;
 
 ##
 ## @brief Commands for running gcc to compile a C++ file in object file.
@@ -94,48 +88,36 @@ def compile(file, binary, target, depancy, flags, path, name, basic_path, module
 	except:
 		pass
 	list_flags = [];
-	try:
+	if "c" in target.global_flags:
 		list_flags.append(target.global_flags["c"])
-	except:
-		pass
-	try:
+	if "c++" in target.global_flags:
 		list_flags.append(target.global_flags["c++"])
-	except:
-		pass
 	for type in ["c", "c++"]:
-		try:
+		if type in depancy.flags:
 			list_flags.append(depancy.flags[type])
-		except:
-			pass
 	for view in ["local", "export"]:
-		for type in ["c", "c++"]:
-			try:
-				list_flags.append(flags[view][type])
-			except:
-				pass
+		if view in flags:
+			for type in ["c", "c++"]:
+				if type in flags[view]:
+					list_flags.append(flags[view][type])
 	# get blacklist of flags
 	list_flags_blacklist = [];
-	try:
+	if "c-remove" in target.global_flags:
 		list_flags_blacklist.append(target.global_flags["c-remove"])
-	except:
-		pass
-	try:
+	if "c++-remove" in target.global_flags:
 		list_flags_blacklist.append(target.global_flags["c++-remove"])
-	except:
-		pass
 	for type in ["c-remove", "c++-remove"]:
-		try:
+		if type in depancy.flags:
 			list_flags_blacklist.append(depancy.flags[type])
-		except:
-			pass
 	for view in ["local", "export"]:
-		for type in ["c-remove", "c++-remove"]:
-			try:
-				list_flags_blacklist.append(flags[view][type])
-			except:
-				pass
+		if view in flags:
+			for type in ["c-remove", "c++-remove"]:
+				if type in flags[view]:
+					list_flags_blacklist.append(flags[view][type])
 	# apply blacklisting of data and add it on the cmdLine
-	cmd.append(remove_element(list_flags, list_flags_blacklist));
+	clean_flags = tools.remove_element(list_flags, list_flags_blacklist)
+	#debug.warning("plop " + str(list_flags_blacklist) + "       " + str(list_flags) + "  --> " + str(clean_flags) )
+	cmd.append(clean_flags);
 	cmd.append(["-c", "-MMD", "-MP"])
 	cmd.append(file_src)
 	# Create cmd line
diff --git a/lutin/z_system/lutinSystem_MacOs_c.py b/lutin/z_system/lutinSystem_MacOs_c.py
new file mode 100644
index 0000000..87a4344
--- /dev/null
+++ b/lutin/z_system/lutinSystem_MacOs_c.py
@@ -0,0 +1,24 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+##
+## @author Edouard DUPIN
+##
+## @copyright 2012, Edouard DUPIN, all right reserved
+##
+## @license APACHE v2.0 (see license file)
+##
+
+from lutin import debug
+from lutin import system
+from lutin import tools
+from lutin import env
+import os
+
+class System(system.System):
+	def __init__(self, target):
+		system.System.__init__(self)
+		# create some HELP:
+		self.set_help("C: Generic C library")
+		self.add_flag("c-remove","-nodefaultlibs")
+		self.set_valid(True)
+
diff --git a/lutin/z_system/lutinSystem_MacOs_cxx.py b/lutin/z_system/lutinSystem_MacOs_cxx.py
index 8a70fd3..6ab0647 100644
--- a/lutin/z_system/lutinSystem_MacOs_cxx.py
+++ b/lutin/z_system/lutinSystem_MacOs_cxx.py
@@ -21,6 +21,7 @@ class System(system.System):
 		self.set_help("CXX: Generic C++ library")
 		self.set_valid(True)
 		# no check needed ==> just add this:
+		self.add_depend("c")
 		self.add_flag("c++","-D__STDCPP_LLVM__")
 		self.add_flag("c++-remove","-nostdlib")
 		self.add_flag("need-libstdc++", True)