Compiler Option: -mt

The -mt compiler option forces linking with thread-safe runtime library for multithreaded applications. The thread-safe version is always used automatically if the FreeBASIC built-in threading functions are used, so you only need to specify this option if using your own threading routines.

The intrinsic macro __FB_MT__ is set to non-zero (-1) if the -mt option was specified, or whether one of the Threadtcreate or ThreadCall keywords is used more above in the source code. Otherwise, it is set to zero (0).