Announce: FlexDLL, flexible DLLs under Windows

Christopher Faylor
Tue Nov 20 15:48:00 GMT 2007

On Tue, Nov 20, 2007 at 02:49:48PM -0000, Dave Korn wrote:
>On 20 November 2007 13:58, Alain Frisch wrote:
>> Dear Cygwin and MinGW mailing lists,
>> I'd like to announce the availability of FlexDLL, a new tool that should
>> greatly help porting some Unix applications under Windows. FlexDLL
>> implements the classical POSIX dlopen API. In short, it lets you create
>> DLLs with unresolved symbols. 
>> Feedback and comments are very welcome!
>  This looks very interesting indeed.  The technique of turning unresolved
>imports into data items that can be fixed up at runtime thus letting the
>windows runtime loaded accept the dll is a clever trick, and it occurs to me
>that it might be worth adopting the same technique directly in the binutils
>toolchain itself.
>  Thanks for your valuable contribution!

Indeed, this is very interesting.  It sounds a little like the code in Cygwin which handles optional linking from dlls but it
is obviously much more advanced.


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