Call functions from Cygwin compiled dll.

[Hans-Bernhard Bröker]

Am 24.06.2016 um 09:57 schrieb Azatyan, Anushavan:

> I have build in cygwin environment my own dll which calls standard unix like functions
> (fopen, fclose, fread …).

I'll interrupt you right there. No, those are not "unix like functions".
Those are Standard C Library functions, i.e. they're required by the
definition of the C programming language itself. Unix-like functions
would be the ones without the leading 'f', i.e. open(), creat(), read(),
write() etc.

Now the Cygwin implementations of these Standard C Library functions
will have some differences in behaviour, as compared to those provided
by Windows native C compilers (MSVC, MinGW*, ...). But those differences
would be much easier to account for than pull in the entire Cygwin 
subsystem just for this.

> And now I would like to attach that dll to my program which is
> developed in Visual Studio environment and call some of my function from that dll.
> Or I would like to call functions from my dll in Matlab mex or in LabView vi.

For all those jobs you'll need a native Windows DLL. To build one inside
the Cygwin universe you would use the MinGW64 cross-compilation tools.
OTOH, if you already have an use MSVC, it may be better to use it for
this, too.


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