[asterisk-dev] [Code Review] 3488: RAII_VAR: nested functions aren't portable. Adapting RAII_VAR to use clang/llvm blocks to get the same/similar functionality.

[rmudgett]

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This review can be discarded now.

- rmudgett


On May 15, 2014, 3:57 a.m., Diederik de Groot wrote:
> 
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> https://reviewboard.asterisk.org/r/3488/
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> (Updated May 15, 2014, 3:57 a.m.)
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> 
> Review request for Asterisk Developers.
> 
> 
> Bugs: ASTERISK-20850
>     https://issues.asterisk.org/jira/browse/ASTERISK-20850
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> Repository: Asterisk
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> Description
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> 
> RAII_VAR: nested functions aren't portable. Adapting RAII_VAR to use clang/llvm blocks to get the same/similar functionality.
> Making it possible again to use clang as a compiler, instead of depending on gcc completely.
> 
> Compile instructions:
> ================
> ./bootstrap.sh
> CC=clang CXX=clang++ ./configure --enable-dev-mode
> Needed to set DISABLE_INLINE to get passed the double declaration error in api-inline.h, i guess someone needs to figure out how to get this passed clang, correctly
> make menuselect.makeopts
> menuselect/menuselect --enable DISABLE_INLINE
> Needed to suppresse some of the warnings to get clang to compile (for now), clang can be a little panicky, but for a good reason.
> 
>     -Wno-unknown-warning-option. When gcc doesn't know a compiler option it returns NON-ZERO errorlevel, clang returns ZERO errorlevel, which is annoying. Even the linux kernel developers group complained about this. Will be fixed/changed (hopefully soon). For now, when checking clang compiler options, you would need to grep and parse the error output
>     -Wno-error needed to quite down clang being panicky (Standard asterisk -Werror is a good idea in general, but not when compiling against a 'new' compiler )
> 
> ASTCFLAGS="-Wno-unknown-warning-option -Wno-error" make
> make install
> RAII_VAR seems to work, but i guess there is still a bit of work before clang support for the rest of asterisk can be announced.
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> 
> Diffs
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>   /trunk/makeopts.in 413043 
>   /trunk/main/Makefile 413043 
>   /trunk/include/asterisk/utils.h 413043 
>   /trunk/configure.ac 413043 
>   /trunk/configure UNKNOWN 
>   /trunk/Makefile 413043 
> 
> Diff: https://reviewboard.asterisk.org/r/3488/diff/
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> Testing
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> Just a proof of concept, to show how asterisk could be made clang compatible again.
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> 
> Thanks,
> 
> Diederik de Groot
> 
>

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