Re: Visibility of compiler symbols between executables and DLLs

[Christopher Faylor <cgf-no-personal-reply-please@cygwin.com>]

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

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