Re: Autoconf 2.49d test: Command not found

[Raja R Harinath]

Hi,

"Lars J. Aas" <address@hidden> writes:
> On Wed, Mar 21, 2001 at 02:20:02PM +0000, John Poltorak wrote:
> : On further investigation, it seems to be coming from here:-
> : 
> : $(srcdir)/version.texi: stamp-vti
> :     @:
> : 
> : My Make struggles to understand '@:'. 
> : 
> : What is it supposed to mean?
> 
> @ tags the make rule so that make doesn't display it before executing it,
> and : is the command.  It's basically a "nop" in this context.  I don't
> get why it's there - shouldn't be necessary from what I know about portable
> makefiles.

I think it forces 'make' to recheck the timestamp of the rule target.

Otherwise, 'make' can use the reasonable optimization that if no rules
were executed, the timestamp didn't change -- and avoid executing any
rules that require $(srcdir)/version.texi.

- Hari
-- 
Raja R Harinath ------------------------------ address@hidden
"When all else fails, read the instructions."      -- Cahn's Axiom
"Our policy is, when in doubt, do the right thing."   -- Roy L Ash