automatically detect flags supported by matiec and find correct path
for matiec C library files
This makes possible to use an old matiec and the new one.
int CheckRetainBuffer(void){ return 1;}void ValidateRetainBuffer(void){}void InValidateRetainBuffer(void){}void Retain(unsigned int offset, unsigned int count, void *p){}void Remind(unsigned int offset, unsigned int count, void *p){}