Merged with require version for Linux.

Should work now on all operating systems.

require.h

 #ifndef require_h
 #define require_h
 
-int require(char* lib, char* version);
-char* getLibVersion(char* lib);
-int libversionShow(char* pattern);
+int require(const char* libname, const char* version);
+const char* getLibVersion(const char* libname);
+int libversionShow(const char* pattern);
 
 #endif