asterisk/res/pjproject/third_party/build/gsm/config.h

#ifdef _MSC_VER
#   pragma warning(disable: 4100)   // unreferenced formal parameter
#   pragma warning(disable: 4101)   // unreferenced local variable
#   pragma warning(disable: 4244)   // conversion from 'double ' to 'float '
#   pragma warning(disable: 4305)   // truncation from 'const double ' to 'float '
#   pragma warning(disable: 4018)   // signed/unsigned mismatch
//#   pragma warning(disable: 4701)   // local variable used without initialized
#endif

#include <string.h>
#include "../../gsm/inc/config.h"