[Qt-interest] qmake/moc goes into endless loop when files have a timestamp in the future

[Thiago Macieira]

Em Quarta-feira 10. Março 2010, às 23.01.19, Jaco Naude escreveu:
> Hi
> 
> I'm not sure if the issue is with creator or with the qt tools (qmake
> & moc) so I'm giving both lists a try.
> 
> I accidentally set my system time to a date in the future and only
> realized it a day or so later. After I changed back the time and try
> to build my project, the tools goes into a endless loop. See the the
> qmake output below for an example:

Please touch all of your files and reset the date. The problem is probably with 
make, not moc or qmake.

make compares the timestamp of the target file and of the source file. If the 
source file is newer than the target file, then it runs the commands that 
generate the target file. But if the source file has dates in the future, the 
newly-generated target file will still be "older" than the source.

Note the same problem happens if your clock is set wrong the other way: if the 
clock is before the source dates, the same problem will happen (since both zip 
and tar keep the original dates of when the package was created).

Times are extremely important for make, to the point that NTP is mandatory if 
you're building on an NFS share.

> I think it is because some files have a timestap in the future. Is
> there a way to get around this? Or should I manually edit all files
> with the date set back? I tried to set the attributes of all files
> with the date set back but that does not do the trick.

Just touch all files "source" files.

-- 
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
  Senior Product Manager - Nokia, Qt Development Frameworks
      PGP/GPG: 0x6EF45358; fingerprint:
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