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How to modify algorithm that determines weather a target needs rebuild
From: |
mirage1987 |
Subject: |
How to modify algorithm that determines weather a target needs rebuild |
Date: |
Sun, 8 Aug 2010 00:38:34 -0700 (PDT) |
Hi Experts,
I am new to GNU make and doesn't have much experience with builds.
I wanted to test a scenario where i need to modify the condition that
determines weather
a target needs to be build or not.
Consider the following rule:
foo.o : foo.c
cc -c foo.c
Currently if i am not wrong make builds the target:
- if either the target doesn't exist
- or the time-stamp of the target is older than the last modified time of
the files
I need to modify to something like
Build happens if
- if either the foo.o doesn't exist;
- timestamp of foo.o is equal to the timestamp of the foo.c
And after every successful build of the target i touch the target file to
point to timestamp of foo.c
I want to do this because the timestamp of my source file (foo.c) could
change both back and forth.
So i need to build the target only if the timestamp changes for source.
Is it possible to achieve this by just defining the makefile rules or would
i need to modify the
code of GNU make.
Thanks and Regards
--
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- How to modify algorithm that determines weather a target needs rebuild,
mirage1987 <=
- Re: How to modify algorithm that determines weather a target needs rebuild, Paul Smith, 2010/08/08
- Re: How to modify algorithm that determines weather a target needs rebuild, mirage1987, 2010/08/09
- Re: How to modify algorithm that determines weather a target needs rebuild, Philip Guenther, 2010/08/09
- Re: How to modify algorithm that determines weather a target needs rebuild, Todd Showalter, 2010/08/09
- Re: How to modify algorithm that determines weather a target needs rebuild, Paul Smith, 2010/08/09
- Re: How to modify algorithm that determines weather a target needs rebuild, David Boyce, 2010/08/09
- Re: How to modify algorithm that determines weather a target needs rebuild, Todd Showalter, 2010/08/09
Re: How to modify algorithm that determines weather a target needs rebuild, Bob Proulx, 2010/08/09