Re: [exim-dev] OS/Makefile-Base - why a double colon rule

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Author: Jeremy Harris
To: exim-dev
Subject: Re: [exim-dev] OS/Makefile-Base - why a double colon rule
On 26/12/17 13:46, Andreas Metzler wrote:
> Can anybody imagine why this is double-colon rule, i.e.
> version.h
> instead of
> version.h

Tony Finch might know.

At a guess, to ensure it is run at least once - even when version.h
already exists. When originally written there was only version.h ; was added later.

Possibly we could use a FRC: target, if the above guess is right.
We could use .PHONEY in gnu make, but it is not portable so would prefer