Re: let me rephrase that -- question about empty commands

[Noel Yap]

"Paul D. Smith" wrote:
>   ny> Anyway, the behaviour I had seen was when I had somithing like the
>   ny> following rules:
> 
>   ny>   .SUFFIXES: .pm _wrap.cc
>   ny>   $(build.DIR)/common/%.pm: $(build.DIR)/common/%_wrap.cc
> 
> First note that all your uses of .SUFFIXES here are useless: .SUFFIXES
> is _ONLY_ used for suffix rules.  These are pattern rules, so you don't
> need to set .SUFFIXES, and the value of .SUFFIXES isn't used.

Hmmm, I could've sworn I had seen behaviour changes due to missing .SUFFIXES:.  
I'll try removing them to see what happens.

>   ny>   .SUFFIXES: .pm _wrap.cc
>   ny>   $(build.DIR)/common/%.pm: $(build.DIR)/common/%_wrap.cc
>   ny>         @:
> 
>   ny> Is this expected behaviour?
> 
> Yes, this is correct behavior.  This is a pattern rule, not an explicit
> rule like the example in the whitepaper.  Pattern rules work
> differently.
> 
> See the section "Canceling Implicit Rules" in the GNU make manual.

OK.

Thanks,
Noel
-- 
NOTICE: If received in error, please destroy and notify sender.  Sender does 
not waive confidentiality or privilege, and use is prohibited.