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Re: Why don't more makefiles use rules like this: %.d %.o: %.c
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From: |
Philip Guenther |
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Subject: |
Re: Why don't more makefiles use rules like this: %.d %.o: %.c |
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Date: |
Wed, 11 Nov 2009 18:38:45 -0800 |
On Wed, Nov 11, 2009 at 3:25 PM, John Fisher <address@hidden> wrote:
...
> My style uses a pattern rule like this
>
> %.d %.o: %.c
>
> and the -MMD switch to the GNU C compiler to create dependencies and object
> files at the same time.
The latter (-MMD) is a good choice, yes.
The former (using a multiple target pattern rule that has %.d as a
target) is pointless or even harmful in my experience. What are your
reasons for doing that?
Philip Guenther