Re: g++: Shared library, mapfiles, execution speed

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#3546

From: Fred Ma
Date: Fri, 14 Mar 2003 09:49

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Markus Gyger wrote:

> Fred Ma <fma@doe.carleton.ca> writes:
> > My question is:  is execution speed or optimizability
> > (gcc -O) affected by -shared?
>
> PIC might execute slightly slower (less registers might be
> available for optimizations and address calculations might
> take more steps).
>
> >     -Wl,-M,${MATLAB}/extern/lib/sol2/mexFunction.map
>
> > To get a grip on shared functions, I looked at the ld man
> > page for the above -Wl switch.  It talks about mapfiles, and
>
> Regarding speed, map files affect mostly the startup time only.
>
> > I'm using g++ 3.2.1 on solaris 8.
>
> You might want to take a look at gcc2c and use it with the current
> (production) Sun C compiler for maximum speed optimization:
>
> http://soldc.sun.com/migration/linux/gcc2c_tool.html
> http://access1.sun.com/s1sprod/
>
> Markus

Actually, I want to stick with gcc because I want transparency
between solaris8 and Win2K/Cygwin.  Thanks for the suggestions.

Fred

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Subject: Re: g++: Shared library, mapfiles, execution speed
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