Re: GMAKE 3.81 vs GMAKE 4.2

[nikhil jain]

Thank you Paul for the suggestions. Will think over them. Thanks for the
help.

On Tue, Dec 17, 2019 at 9:03 PM Paul Smith <address@hidden> wrote:

> On Tue, 2019-12-17 at 20:44 +0530, nikhil jain wrote:
> > No, I do not want to delete the object file before sending the target
> > out. That's not how make should work or I should make it work.
>
> That is simply not true.
>
> In virtually all cases rebuilding a target will involve deleting the old
> one in some fashion.  Most reliable build systems will create the target as
> a different file then atomically rename it to its final name, so that if
> the command is killed while the target is half-written it doesn't corrupt
> the next build.
>
> It's absolutely fine if the recipe decides to delete the target explicitly
> before starting to rebuild it and a great many recipes work exactly like
> this.  The old file will not be used anyway if the recipe fails, nor should
> you want it to be since it's known to be out of date!
>
> > It is issue with NFS stale mounts which seems to be resolved if we open
> > the file again according to NFS specs (mentioned in another email).
>
> As I haven't seen the actual code you're using I can't say for sure but in
> general I'm leery of adding extra overhead to every check of every target
> to handle an obscure case that can't actually happen with standard make.
>
>