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Re: [MPlayer-dev-eng] [PATCH v2] configure: Avoid eh_frame bloat in release builds




On Sat, 13 Feb 2016 16:53:17 +0100
Reimar Döffinger <Reimar.Doeffinger@xxxxxx> wrote:

> > -fno-async provides the majority of the size benefit indeed, the
> > difference was just bytes. Attaching v2.
> 
> I also suspect, as we are checking it to work anyway, that this
> shouldn't be gnu only.
> Seems reasonable to believe that other compilers might have the
> same option.

Google says clang supports the option, but I cannot test that.

> > The few C++ files in mplayer and ffmpeg do not use exceptions
> > (incidentally, -fno-exceptions and -fno-rtti should be added to
> > CXXFLAGS, they have size impact as well).
> 
> To my knowledge, -fno-rtti changes ABI, and those C++ files are
> mostly there to use C++ library (which might use RTTI and exceptions,
> to the exceptions thing might not matter).
> So I don't believe these options are safe to add.

Those options are quite safe when the code doesn't use the features.
The C++ library's internals do not matter, it's made so that programs
with and without rtti and exceptions work.

If this were a C++ library instead of a program, then they wouldn't be
safe to add, in case a user of the library used the features.

- Lauri
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