Mail Archives: cygwin/2003/10/23/13:32:56
Thank you for your replies. But here is my problem:
I am trying to make a DLL from a C program that has embedded Perl in it.
I successfully created the DLL, and also created a test C client. The
client successfully calls the DLL. All this is done in Cygwin and without
the "-mno-cygwin" option.
But, when I try to invoke this DLL from Visual Basic, the application
crashes with the error message, "An unhandled Win32 Exception has
occurred in VB6.EXE."
Thanks.
Paul
On Thu, 23 Oct 2003, Igor Pechtchanski wrote:
> On Thu, 23 Oct 2003, Paul Bezzam wrote:
>
> > Hello everyone,
> >
> > I have this issue: I have a C program that uses embedded perl to call a
> > Perl subroutine. This runs successfully when compiled with gcc with
> > default options. But, when I use the -mno-cygwin option, I get errors
> > indicating that some include files are not available. (The error messages
> > are shown below my signature)
> >
> > All of this is on Cygwin. Can anyone please point my mistakes?
> >
> > Thank you.
> > Paul
> >
> > Below is part of the error message:
> >
> > $ gcc -c -mno-cygwin mpdll2.c `perl -MExtUtils::Embed -e ccopts -e ldopts`
> > Note (probably harmless): No library found for -lcrypt
> > Note (probably harmless): No library found for -lutil
> > In file included from mpdll2.c:2:
> > /usr/lib/perl5/5.8.0/cygwin-multi-64int/CORE/perl.h:613:27: netinet/in.h:
> > No such file or directory
> > /usr/lib/perl5/5.8.0/cygwin-multi-64int/CORE/perl.h:617:26: arpa/inet.h:
> > No such file or directory
> > /usr/lib/perl5/5.8.0/cygwin-multi-64int/CORE/perl.h:663:27: sys/times.h:
> > No such file or directory
> > /usr/lib/perl5/5.8.0/cygwin-multi-64int/CORE/perl.h:782:30: sys/ioctl.h:
> > No such file or directory
> > /usr/lib/perl5/5.8.0/cygwin-multi-64int/CORE/perl.h:1193:23: ieeefp.h: No
> > such file or directory
> > /usr/lib/perl5/5.8.0/cygwin-multi-64int/CORE/perl.h:1984:21: win32.h: No
> > such file or directory
> > In file included from
> > /usr/lib/perl5/5.8.0/cygwin-multi-64int/CORE/perl.h:2215,
> > from mpdll2.c:2:
>
> Paul,
>
> When you give the -mno-cygwin flag to gcc, you're invoking the MinGW
> runtime/environment. MinGW stands for "Minimalist GNU for Windows" (the
> keyword here is "Minimalist"). It doesn't supply all of POSIX emulation,
> and it's very likely that some of the headers (and system calls) aren't
> available in it.
>
> You will most likely have to implement a lot of the functionality using
> Windows native calls (e.g. winsock, etc). It also looks like you're
> pulling in the Cygwin versions of perl headers - while not an error in
> itself, this might be a warning flag, since Cygwin and MinGW runtimes
> usually don't mix well.
> Igor
> --
> http://cs.nyu.edu/~pechtcha/
> |\ _,,,---,,_ pechtcha AT cs DOT nyu DOT edu
> ZZZzz /,`.-'`' -. ;-;;,_ igor AT watson DOT ibm DOT com
> |,4- ) )-,_. ,\ ( `'-' Igor Pechtchanski, Ph.D.
> '---''(_/--' `-'\_) fL a.k.a JaguaR-R-R-r-r-r-.-.-. Meow!
>
> "I have since come to realize that being between your mentor and his route
> to the bathroom is a major career booster." -- Patrick Naughton
>
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