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.TP
\fB\-T#\fR
-Compress using # threads (default: 1)\. If \fB#\fR is 0, attempt to detect the number of physical CPU cores and compress with that many threads\. This modifier is only available if \fBzstd\fR was compiled with multithreading support\.
+Compress using # threads (default: 1)\. If \fB#\fR is 0, attempt to detect the number of physical CPU cores and compress with that many threads\. This modified does nothing if \fBzstd\fR was compiled without multithread support\.
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.TP
\fB\-D file\fR
Compress using # threads (default: 1).
If `#` is 0, attempt to detect the number of physical CPU cores and compress with
that many threads.
- This modifier is only available if `zstd` was compiled with multithreading support.
+ This modified does nothing if `zstd` was compiled without multithread support.
* `-D file`:
use `file` as Dictionary to compress or decompress FILE(s)
* `--nodictID`: