[Qt-interest] dll problem

[Jeroen Wijnhout]

On Thu, Dec 11, 2008 at 11:00 AM,  <Oliver.Knoll at comit.ch> wrote:
> Evan Teran wrote on Monday, December 08, 2008 9:15 PM:
>
>> Actually, my problem isn't lack of compilation. It's runtime crashes
>> that don't occur on my linux builds.
>>
>> I actually need to do the opposite of your suggestion to, because
>> some of my plugins use objects which are provided by my core
>> application.
>
> That's "broken by design", also on Linux (in fact, this broken design has nothing to do with any OS, is a
>"platform-independent broken-by-design" :)

Broken or not, the people from the linux linker thought it was
important enough to support. From the ld man page:

       -E
       --export-dynamic
	   When creating a dynamically linked executable, add all  symbols  to
	   the	dynamic  symbol table.	The dynamic symbol table is the set of
	   symbols which are visible from dynamic objects at run time.

	   If you do not use this option, the dynamic symbol table  will  nor-
	   mally  contain  only  those	symbols  which	are referenced by some
	   dynamic object mentioned in the link.

	   If you use "dlopen" to load a dynamic object which needs  to  refer
	   back  to the symbols defined by the program, rather than some other
	   dynamic object, then you will probably need to use this option when
	   linking the program itself.

	   You	can also use the version script to control what symbols should
	   be added to the dynamic symbol table if the output format  supports
	   it.	See the description of --version-script in VERSION.


Note that executables are technically very similar to shared libraries
(in terms of what the linker does to the file after loading).

best,
Jeroen