how_pxp

早期freebsd实现

@(#)how_pxp	1.1 (Berkeley) 3/2/81
To profile a program do
	pxp -z name.p
after a translation specifying this option to pi and an execution, i.e.:
	pi -z name.p
	px
or
	pix -z name.p
To use pxp to reformat a program you can use the command:
	pxp name.p >newname.p
The complete format for using pxp is
	pxp [ -acdefjntuw_ ] [ -23456789 ] [ -z [ name ... ] ] name.p