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Re: [gpsd-dev] regression tests blow up on os x 10.9 with shm issues

From: Eric S. Raymond
Subject: Re: [gpsd-dev] regression tests blow up on os x 10.9 with shm issues
Date: Thu, 12 Feb 2015 15:40:06 -0500
User-agent: Mutt/1.5.23 (2014-03-12)

Greg Troxel <address@hidden>:
> Things are much better with release-3.11-434-g8b107ca, passing on os x
> 10.9, netbsd-5 amd64 and netbsd-6 i386.

That's great!  Have you played with WRITE_PAD to see if it can be zeroed or

Interestingly, when I try building on Frank Nicholas's OS X box, GPS regression
tests pass but gpsdecode coredumps when trying to interpret RTCM2 or AIVDM
files.  I suspect this is some kind of dynamic-loading issue; I prevented it
once by forcing static linking, but have not been able to reproduce that.

> I am seeing one leftover shm segment after running tests.  Not a huge
> problem, but really there should not be any.

I can think of a good reason for one to be left over. Apparently shmctl(2)
marks segments for deletion but it's up to the kernel to decide when the
memory is actually garbage-collected - that's what the man page description
implies, anyway.

The only known issue left is Hal's bizarre build glitch.  

I might try tweaking the build to work with uClibc - libdbus needs to move
to the end of the library list - but it looks to me like the C code is ready
to ship.  I'll run all four static checkers on it, though.
                <a href="";>Eric S. Raymond</a>

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