Application to showcase build problem when including mbed.h from .cpp and .c -files. Folder structure and nested #includes inside #ifndefX+#defineX+#endif obfuscate the reason. Compiler error is about 'keyword namespace not found', which happens when mbed.h is included from .c.

Revision:
0:7c2be109ea78
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/foldertest1/foldertest1/foldertest1.h	Tue Sep 27 07:13:58 2016 +0000
@@ -0,0 +1,6 @@
+#ifndef FOLDERTEST1_H
+#define FOLDERTEST1_H
+
+#include "mbed.h"
+
+#endif