[asterisk-dev] [Code Review] Out-of-tree modules can fail because of compiler flag differences.

[Jeff Peeler]

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Ship it!


I can't find anything wrong here, but it would be good to try and test with a third party module if possible.


/trunk/include/asterisk/lock.h
<https://reviewboard.asterisk.org/r/508/#comment4102>

    Spacing is inconsistent here: a, # a


- Jeff


On 2010-04-12 15:55:13, Jason Parker wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviewboard.asterisk.org/r/508/
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> (Updated 2010-04-12 15:55:13)
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> Review request for Asterisk Developers.
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> Summary
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> When compiling modules out-of-tree, there is a large potential for ABI breakage, due to changing compiler flags.  If Asterisk is compiled with DEBUG_THREADS, and an out-of-tree module is not, it should not give undefined symbol errors during load (in fact, there's no reason it shouldn't work).  The biggest problem areas seemed to be DEBUG_THREADS and DEBUG_CHANNEL_LOCKS.
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> Is this the right way to go about this?
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> Note: Many of the functions in lock.h had to be moved into a .c file (main/lock.c).  They were defined as static inline, which defeats much of the purpose.  A module *would* have the information about where a lock was obtained, but since it was including lock.h without DEBUG_THREADS enabled, it wouldn't bother logging it - even though Asterisk would really like it to.
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> Diffs
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>   /trunk/include/asterisk/astobj2.h 256980 
>   /trunk/include/asterisk/heap.h 256980 
>   /trunk/include/asterisk/lock.h 256980 
>   /trunk/include/asterisk/res_odbc.h 256980 
>   /trunk/main/astobj2.c 256980 
>   /trunk/main/heap.c 256980 
>   /trunk/main/lock.c PRE-CREATION 
>   /trunk/res/res_odbc.c 256980 
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> Diff: https://reviewboard.asterisk.org/r/508/diff
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> Testing
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> Compile tests with/without DEBUG_THREADS and DEBUG_CHANNEL_LOCKS work great.  I've not tried building an external module with different flags yet.  I suspect that one would compile fine, but may not act properly, partially because of the note above.
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> Thanks,
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> Jason
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>