Crash with LMDB on iOS

[QW Support]

I'm having trouble running the latest LMDB version on iOS 8.1.3

It seems to work with previous versions before SysV semaphores were used.

Now it crashes with SIGSYS on line:

semid = semget(IPC_PRIVATE, 2, mode);
(line:4520 file:mdb.c)

Has anyone got this to work?

Thanks

- Greg

[Howard Chu]

Content preview: QW Support wrote: > I'm having trouble running the latest
LMDB version on iOS 8.1.3 > > It seems to work with previous versions before
SysV semaphores were used. > > Now it crashes with SIGSYS on line: > > semid
= semget(IPC_PRIVATE, 2, mode); > (line:4520 file:mdb.c) > > Has anyone got
this to work? [...]

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See
http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block
for more information.
[URIs: highlandsun.com]
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[score: 0.0000]

Post by QW Support
I'm having trouble running the latest LMDB version on iOS 8.1.3
It seems to work with previous versions before SysV semaphores were used.
semid = semget(IPC_PRIVATE, 2, mode);
(line:4520 file:mdb.c)
Has anyone got this to work?

Sounds like iOS doesn't support SysV semaphores. That's unfortunate. I
was hoping we could forget about the POSIX semaphore code but apparently
we can't. I suggest you look back through the git history and revert the
commit that removed the POSIX semaphore code in your build.

LMDB on iOS is pretty limited already; iOS only supports 2GB of address
space even on the 64 bit builds. Apple's quite dishonest here,
advertising 64 bit support but not actually delivering any of the
advantages of it.