Seems it was introduced it in 7.4.234, see http://ftp.nluug.nl/editors/vim/patches/7.4/7.4.234
That var is cool, as you don't even have to have Vim in your path to setup inverse and forward search for example.
But for earlier version consider using v:progname instead, that has been around since Vim 6.
As long as Vim is in your path, all will work even with v:progname.
Seems it was introduced it in 7.4.234, see http://ftp.nluug.nl/editors/vim/patches/7.4/7.4.234 That var is cool, as you don't even have to have Vim in your path to setup inverse and forward search for example. But for earlier version consider using
v:progname
instead, that has been around since Vim 6. As long as Vim is in your path, all will work even withv:progname
.