[Bug-tar] Any way to pass options to alternative compress program?

[David Rosenstrauch]

I'm trying to make use of the --use-compress-program option of tar, to 
use an alternative compression app when building my tarball.  However, 
I'm trying to find a way to pass parameters to the compression program, 
but I don't see any way to do that.

The alternative compression program I'm calling, pigz (a parallelizable 
version of gzip compression), has a parameter -p to control the number 
of CPU's to use in the parallelization.  But there doesn't seem to be 
any way for me to pass that parameter from the tar command.  For 
example, the following command doesn't work:

address@hidden code]$ tar  --use-compress-program "pigz -p 2" -cf 
/tmp/test.tar.pgz .
tar (child): pigz -p 2: Cannot exec: No such file or directory
tar (child): Error is not recoverable: exiting now

Anyone know how I might accomplish this?

Thanks,

DR