Hi All,

While trying to install epiktimer following this wiki page:

http://wiki.lazarus.freepascal.org/EpikTimer

I got this error:

/home/xrfang/git/epiktimer/epiktimer.pas(403,29) Error: Identifier not
found "clock_gettime"

I am running Lazarus 1.2.4/FPC2.6.2 on Ubuntu 14.10 64bit.

Any ideas?

Thanks a lot.

Xiangrong
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clock_gettime is defined in unit Linux.

I am running Lazarus 1.2.4/FPC2.6.2 on Ubuntu 14.10 64bit.

Mattias

Thanks, this worked. I added unit Linux in here:

{$IFDEF Windows}
  Windows, MMSystem,
{$ELSE}
  unix, unixutil, baseunix, *Linux*,
{$ENDIF}

Should this be considered a minor bug in epiktimer's platform dependant code?

Xiangrong

2014-09-02 22:28 GMT+08:00 Mattias Gaertner :

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Mattias Gaertner wrote

clock_gettime is defined in unit Linux.

It seems FPC it out of date then. Because clock_gettime is a POSIX.1 standard, and FreeBSD has support for it.

http://www.freebsd.org/cgi/man.cgi?query=clock_gettime

I'll file a bug report on Mantis if one doesn't already exist.

Regards,
- Graeme -

Graeme Geldenhuys wrote

It seems FPC it out of date then. Because clock_gettime is a POSIX.1 standard, and FreeBSD has support for it.

Trouble is that monotonic clock support is an optional part of the standard, AND the cheapness/accurancy tradeoffs of the same constants may vary with OS. (e.g. freebSD MONOTONIC vs MONOTONIC_FAST, the latter I'd expect in a gettickcount)

Did you see my patch in FPC Mantis regarding this? If it's not 100% correct (I'm a total newbie when it comes to compiler development), hopefully it is at least a good starting point to implement this in FreeBSD. Any feedback would be appreciated.

Regards,
Graeme
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I committed it, since the patch itself was ok. Maybe it should have been attempted to come to one implementation for free/open/net in bsd.pas though.

What I was hinting above maybe the sysutils code should use MONOTONIC_FAST, not MONOTONIC on FreeBSD. Granularity worsens, but performnace improves.

It depends on what the sysutils routine is supposed to favor.

I was thinking of that too afterwards. Though I don't have access to Open/NetBSD systems, so not sure how compatible it is with FreeBSD.

Ah, I see what you mean. I'll look into this and do a few more tests.

Regards,
Graeme
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Graeme Geldenhuys wrote

I was thinking of that too afterwards. Though I don't have access to Open/NetBSD systems, so not sure how compatible it is with FreeBSD.

In general very, but with some exceptions and sometimes a bit of time between introduction of a feature over all flavors.