http://d.puremagic.com/issues/show_bug.cgi?id=4854


nfxjfg@gmail.com changed:

           What    |Removed                     |Added
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                 CC|                            |nfxjfg@gmail.com


--- Comment #9 from nfxjfg@gmail.com 2010-11-08 14:19:29 PST ---
I'm curious: why you need to rely on (obviously) not guaranteed linker
behaviour?
Btw. gcc supports TLS variables via extensions, if that is the problem.

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--- Comment #10 from Jacob Carlborg <doob@me.com> 2010-11-09 00:09:39 PST ---
TLS is not supported by GCC on Mac OS X.

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--- Comment #11 from Jacob Carlborg <doob@me.com> 2010-11-20 03:14:21 PST ---
Created an attachment (id=823)
Patch

I'm adding my patch here as well so it doesn't get lost.

I've created a patch but I'm not completely sure if it solves the problem or not. I don't get an error in __tls_get_addr now but instead I get this:

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x00000000
0x97655133 in strncmp ()
(gdb) bt
#0  0x97655133 in strncmp ()
#1  0x0000101c in ?? ()
Previous frame inner to this frame (gdb could not unwind past this frame)
(gdb)

Maybe someone else can look at the patch and see if I did something wrong or maybe the solution we thought of couldn't fix the problem.

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Andrei Alexandrescu <andrei@metalanguage.com> changed:

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                 CC|                            |andrei@metalanguage.com


--- Comment #12 from Andrei Alexandrescu <andrei@metalanguage.com> 2012-01-31 14:57:11 PST ---
Can this be still reproduced? The code works for me on OSX 10.7.2.

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--- Comment #13 from Jacob Carlborg <doob@me.com> 2012-01-31 23:32:45 PST ---
(In reply to comment #12)
> Can this be still reproduced? The code works for me on OSX 10.7.2.

As the title say, it's only for Mac OS X 10.5.

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--- Comment #14 from Walter Bright <bugzilla@digitalmars.com> 2012-02-06 19:58:16 PST ---
Is anyone still running 10.5? That's two OSX versions ago.

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--- Comment #15 from Jacob Carlborg <doob@me.com> 2012-02-07 04:21:38 PST ---
I (In reply to comment #14)
> Is anyone still running 10.5? That's two OSX versions ago.

I don't know. But I see now reason why we shouldn't support 10.5 as long as it doesn't cause too much problem. We're still supporting Windows XP which is two versions ago as well and is far older than Mac OS X 10.5. And yes, I know you can't really compare Mac OS X and Windows in this case.

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--- Comment #16 from github-bugzilla@puremagic.com 2012-03-07 18:33:23 PST ---
Commit pushed to master at https://github.com/D-Programming-Language/druntime

https://github.com/D-Programming-Language/druntime/commit/73cf2c150665cb17d9365a6e3d6cf144d76312d6
fix Issue 4854 - Regression(2.047, Mac 10.5 only) writefln Segmentation fault
if no globals

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Walter Bright <bugzilla@digitalmars.com> changed:

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


--- Comment #17 from Walter Bright <bugzilla@digitalmars.com> 2012-03-07 18:34:28 PST ---
I don't have 10.5 to test it on, but this should fix it.

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