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]>
>
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