Re: How does $(error) work?

[Paul Smith]

On Wed, 2010-12-08 at 14:20 -0500, Chris Cross wrote:
> 
> Trying to understand how $(error) works. The manual says "error is
> generated whenever this function is evaluated."  With the makefile below I
> would expect to see output from line1 of the recipe but only see output
> from $(error).
> # error.mk
> .PHONY: target
> 
> target:
>       @echo recipe line 1
>       $(error debug exit recipe line 2)
> 
> $ make -f error.mk
> error.mk:5: *** debug exit recipe line 2.  Stop.

That's because make evaluates the entire recipe just before it starts
the first line of the recipe; it doesn't evaluate the lines one at a
time as it's about to execute that line.

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