This is the mail archive of the cygwin mailing list for the Cygwin project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: Visibility of compiler symbols between executables and DLLs


On Mon, Sep 26, 2005 at 02:32:25AM -0700, Brian Dessent wrote:
>Max Bowsher wrote:
>
>> I'm fairly sure that it is impossible. Actually, it might be possible if
>> there was a flag to convice GCC to add an import table to the built .exe,
>> but last time I investigated that, there was no such flag. But even if that
>> was possible, the .dll would need to explicitly link against the .exe that
>> was to load it, for this method to work.
>
>This does actually work, AFAIK.  You need to use __declspec(dllexport)
>on the symbols in the .exe, and produce an import library
>(-Wl,--out-implib) when building the .exe which is then used in linking
>the .dll.  It hardcodes the name of the .exe in the .dll though, so it
>also means that you cannot use the .dll as a general purpose library.

Right on both counts.  This isn't impossible.  It's just not really convenient/useful.

cgf

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]