oops, i forgot to say that i'm nevertheless surprised that CW would be
*that* aggressive at only level 2. i would expect global constructors to
get eliminated only at the very highest optimization level. heck, ideally
i'd expect a warning about them.
----- Original Message -----
From: Chris Antos <[EMAIL PROTECTED]>
To: Palm Developer Forum <[EMAIL PROTECTED]>
Sent: Saturday, February 05, 2000 6:58 PM
Subject: Re: Another Debug-ROM catch
> many (most) optimizations are potentially unsafe. that's why there are so
> many different options for which optimizations to enable, and pragmas to
> turn them off around certain pieces of code, etc. as with any optimizing
> compiler, the higher the optimization level, the more likely that the
> developer will have to twiddle some pragmas around specific pieces of
code,
> to counteract aggressive optimizations.
>
> some optimizing compilers may choose to not even implement optimizations
> that might be unsafe. that's all well and good, but they certainly won't
> produce as fast or compact code as compilers utilizing more aggressive
> optimizations.
>
>
> ----- Original Message -----
> From: Marshall Clow <[EMAIL PROTECTED]>
> To: Palm Developer Forum <[EMAIL PROTECTED]>
> Sent: Saturday, February 05, 2000 3:21 PM
> Subject: Re: Another Debug-ROM catch
>
>
> > At 10:23 PM -0800 2/4/00, Greg Lutz wrote:
> > >Well, my actual example involved calling WinCreateWindow() from within
> the constructor that was called to initialize a global variable. But to
> illustrate the point about the CodeWarrior linker, here's an example
> (slightly extended for dramatic effect!).
> > >
> > >Create a project using C++ stationery (this example uses the stock CW
6.0
> release, with the PalmOS 3.0 SDK). Create the following file "sub.cpp"
and
> add it to the project:
> > >
> > > #include <Pilot.h>
> > >
> > > class C {
> > > public:
> > > C() {
> > > ErrDisplay("Got here");
> > > }
> > > };
> > > C c;
> > >
> > >
> > >In the target settings dialog, set global optimizations to level 2.
> Build and execute the application(1). It will do nothing.
> >
> > Thanks for the example.
> >
> > IMHO, this is incorrect behavior.
> > You have a global variable with a constructor.
> > That constructor has to be run, precisely because of possible side
> effects.
> >
> > [ More steps removed ]
> >
> > -- Marshall
> >
> > "The era of big government is over."
> > Bill Clinton, State of the Union Address, January 23, 1996
> > Marshall Clow Adobe Systems <mailto:[EMAIL PROTECTED]>
> >
> > --
> > For information on using the Palm Developer Forums, or to unsubscribe,
> please see http://www.palm.com/devzone/mailinglists.html
> >
>
>
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