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Date: Mon, 9 Jun 2003 14:51:13 -0700 (PDT)
From: JS <etoilee_nuit AT yahoo DOT com>
Subject: Help!  (creating a dynamically linked shared library)
To: cygwin AT cygwin DOT com
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Hi,

  I'm trying to build a .dll and .lib file in cygwin,
so I can compile and build them in DOS (under windows
later.  I created a simple file called add.cpp that
calls on a function, addfunction.cpp, to add two
numbers.  
  First I compiled addfunction.cpp, then I created an
export file and a .lib file.  When I tried to use the
export file and .o file to create the .dll file, I got
an error saying: 

/usr/lib/gcc-lib/i686-pc-cygwin/3.2/../../../libcygwin.a(libcmain.o)(.text+0x7c)
: undefined reference to `_WinMain AT 16'.

I looked that up in the FAQ, and it said to add an
empty main() into the file....but this is a function
file.  I tried adding the main() in hopes that it
would work, and it did compile, but the extra main()
created problems later when I was trying to build the
.exe in DOS (using:  cl add.cpp function.lib).

  Does anyone have any idea as to how I might fix
this?

These are the commands I used to create the .lib and
exports.o files:

  gcc -c function.c
  dlltool -e exports.o -l function.lib function.o
  gcc function.o exports.o -o function.dll

(it was after the last command line that I got the
error)

Thanks,
 Julie  


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