Re: bash conditional expressions

[Alex fxmbsw7 Ratchev]

i suggest a bash only makefile script then that spawns few instances of
whatever only, i do such whatever overall systems
a find printf to comparement is fairly fast, to estimate new files
then a good gcc in one cmd
done

On Fri, Nov 12, 2021, 14:22 Mischa Baars <mjbaars1977.backup@gmail.com>
wrote:

> Hi Greg,
>
> It is how my makefiles work :)
>
> Do you realize how much time it takes to load the stat executable on all
> source files and object files? Conditional expressions are already in
> memory. I prefer using the mtime field, the atime field and conditional
> expressions.
>
> Mischa.
>
>
> On Fri, Nov 12, 2021 at 1:25 PM Greg Wooledge <greg@wooledge.org> wrote:
>
> > On Fri, Nov 12, 2021 at 10:36:01AM +0100, Mischa Baars wrote:
> > > All of my makefiles only compile source files and link object files
> that
> > > are NEW, as in the modification timestamp is newer than OR EQUAL TO the
> > > access timestamp,
> >
> > That's not how Makefiles work.
> >
> > Makefiles compare the mtimes of two files against each other.  Source
> > and target.  If the source's mtime is greater than the target's mtime,
> > then the target needs to be rebuilt.
> >
> > Most Linux distributions these days are disabling or half-disabling
> > the atime field at the file system mount-option level, because of the
> > tremendous inefficiency and wear on disks that it creates.
> >
> >
>