Re: [PATCH 2/2] maint.mk: Replace grep with $(GREP)

[Eric Blake]

On 11/27/18 12:21 PM, Bruno Haible wrote:
> Roman Bolshakov wrote:
> > Autoconf can discover an alias for GNU
> > grep and set it in GREP but it takes no effect for maint.mk
>
> Does Automake always invoke this Autoconf macro which sets GREP?
>
> In other words, can you guarantee that $(GREP) will never expand to empty?

If we change gl_INIT() to AC_REQUIRE([AC_PROG_GREP]), then that should 
be sufficient to ensure $(GREP) is set by the time Makefile is parsed, 
which in turn will propagate to maint.mk.

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Eric Blake, Principal Software Engineer
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