[Bug 42437] Wine Wiki: Building Wine - Compiler Optimizations & Call-Stacks

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=42437

Kyle Auble <kyle.auble at zoho.com> changed:

           What    |Removed                     |Added
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                 CC|                            |kyle.auble at zoho.com

--- Comment #4 from Kyle Auble <kyle.auble at zoho.com> ---
(In reply to Wylda from comment #0)
> Wiki link:
> https://wiki.winehq.org/Building_Wine#Compiler_Optimizations_.26_Call-Stacks
>
> Says:
> ../wine-source/configure CFLAGS="-g -O1 -fno-optimize-sibling-calls
> -fno-omit-frame-pointer -fno-inline"
>
>
> IMHO these two are superfluous as:
>  * "optimize-sibling-calls" is disabled in -O1 and enabled since -O2
>  * "omit-frame-pointer" is disabled in -O0, -O1 and -O2

Hi Wylda,

This section of the page came from splicing what was already on the wiki with
info from GCC & Clang docs. I never really bothered to see if they were
redundant because that shouldn't cause any problems, plus I think which
features each -O level enables can vary based on your GCC version and config.

(In reply to Austin English from comment #2)
> Actually, you may want -Og for that:
>   -Og                         Optimize for debugging experience rather than
> speed or size.

Now, this -Og option definitely simplifies things so I've rewritten the
wiki-page to emphasize it. I think it's a relatively new feature (the GCC
release notes mention adding it in v4.8), but I imagine most distros have moved
to that version or newer by now. I've left the table of individual flags as a
note though, mainly to give the reader some context about the debug process.

If that sounds good to everybody, I think we can close the bug.

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