Re: strange dependancy generation bug?

From: Sam Ravnborg (sam@ravnborg.org)
Date: Tue Jun 03 2003 - 14:56:51 EST


On Tue, Jun 03, 2003 at 08:11:54PM +0100, Stig Brautaset wrote:
> > What happens is that within Makefile.build there is used multi line
> > definition, where each new-line causes make to launch a new sub-shell.
> > The command for the second sub-shell is echoed, even though make is told
> > not to do so.
>
> I beg to differ. Since make launches a new subshell, the commands in the
> second subshell is _not_ told to shut up, and thus is echoed. No?

In make a so-called "canned command sequence" is generated.
Quote from 'info make':

        On the other hand, prefix characters on the command line that refers
        to a canned sequence apply to every line in the sequence. So the rule:

             frob.out: frob.in
                     @$(frobnicate)

        does not echo _any_ commands.

In kbuild this is exactly what happens.
So according to make info the command for the second sub-shell should not
be echoed.

        Sam
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Sat Jun 07 2003 - 22:00:21 EST