RE: how to use already existing .d files

[Swapna Pawar]

Hi Philip,

Thank you for the quick response.

We have already tried this by adding the following rule:

%.o: %.c
            gcc -c -x c -o "$@" $<"

Modifying the rule as above does not use the existing .d files and does not 
rebuild the .c file in case any required header is modified.
In addition to the above rule, we also tried using '-include $(C_DEPS), not no 
luck..

Regards,
Swapna

-----Original Message-----
From: Philip Guenther [mailto:address@hidden
Sent: 06 December 2013 AM 03:54
To: Swapna Pawar
Cc: address@hidden
Subject: Re: how to use already existing .d files

On Thu, Dec 5, 2013 at 4:10 AM, Swapna Pawar <address@hidden> wrote:
> How can I make gcc use the existing dependency (.d) files, without generating 
> new dependency (.d) files.

Short answer: do not specify %.d as a target in any rule.

Longer answer with explanation: read
http://make.paulandlesley.org/autodep.html#advanced


Philip Guenther
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