Re: Constructors on static variables

Subject: Re: Constructors on static variables
From: Ming Mah <email@hidden>
Date: Thu, 3 Jul 2003 08:04:19 -0400

Hi Randy,

According to Apple, NSAddImage does not bind (and hence call static
initializers) a dylib until you reference something in the library.
Looking up a symbol:
NSSymbol symbol = NSLookupSymbolInImage (mh, dummyFunc, NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_NOW);
is good enough (the symbol needs to exist though).

Have fun.
Ming

Message: 18
Date: Wed, 2 Jul 2003 15:55:41 -0400
To: Randy Croucher <email@hidden>,
email@hidden
From: Eric Slosser <email@hidden>
Subject: Re: Constructors on static variables

I have a dylib with a static variable declared in it, and I never hit this variable's constructor when I called NSAddImage from my main application.

How do you know?

Is there something I need to call to get these constructors called after getting the mach_header back from NSAddImage?

Your dylib should have a section called "__mod_init_func" in the __DATA segment. That should be where the compiler placed a function to call your global objects' ctors. I don't know if NSAddImage is supposed to call it automatically, or whether you're supposed to do something. (I'm a mach-O newbie).
--
//-------------------------------------------------
email@hidden virtual-fx, inc. (617) 244-9694

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