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Re: How compile GNU make from sources?

From Tauno Voipio <tauno.voipio@notused.fi.invalid>
Newsgroups comp.os.linux.development.apps
Subject Re: How compile GNU make from sources?
Date 2018-12-05 20:21 +0200
Organization A noiseless patient Spider
Message-ID <pu94va$amm$1@dont-email.me> (permalink)
References <pu8mr5$s1n$1@node2.news.atman.pl> <pu92c4$o5i$1@dont-email.me> <pu93sc$8hc$1@node2.news.atman.pl>

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On 5.12.18 20:02, Borneq wrote:
> W dniu 05.12.2018 o 18:37, Tauno Voipio pisze:
>>> I want compile it from sources bacause I ant prepare it do not 
>>> rebuild all after git commits.
>>> Make has one big disadvatage: after git commit of project, whole 
>>> project is rebuild.
>>
>>
>> You may be barking up the wrong tree here: To force Make to rebuild
>> the whole kit and caboodle, GIT seeems to change the modification
>> timestamps of the files. It cannot be solved by changing Make.
>>
> 
> I think, git not changes timestamps of my *.cpp files on commit, only on 
> checkout (if I change branch)
> Make looks to .git directory and timestamp of any git file is changed.
> If I previously use ninja, no any *.cpp file was changes, buf "explain" 
> give me
> 
> EXPLAIN("recorded mtime of %s older than most recent input %s (%d vs 
> %d)"...
> and
> EXPLAIN("command line changed for %s", output->path().c_str());
> 
> if I comment this, only changed *.cpp file was build

Your makefile is bad, if it looks at or into .git directory.
Make should use timestamps of the dependencies only.

-- 

-TV

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Thread

How compile GNU make from sources? Borneq <borneq@antyspam.hidden.pl> - 2018-12-05 15:20 +0100
  Re: How compile GNU make from sources? Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2018-12-05 19:37 +0200
    Re: How compile GNU make from sources? Borneq <borneq@antyspam.hidden.pl> - 2018-12-05 19:02 +0100
      Re: How compile GNU make from sources? Rainer Weikusat <rweikusat@talktalk.net> - 2018-12-05 18:18 +0000
      Re: How compile GNU make from sources? Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2018-12-05 20:21 +0200
        Re: How compile GNU make from sources? Borneq <borneq@antyspam.hidden.pl> - 2018-12-05 20:28 +0100
          Re: How compile GNU make from sources? Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2018-12-05 22:43 +0200
            Re: How compile GNU make from sources? Rainer Weikusat <rweikusat@talktalk.net> - 2018-12-05 23:07 +0000
        Re: How compile GNU make from sources? Borneq <borneq@antyspam.hidden.pl> - 2018-12-05 21:30 +0100

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