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Date: Tue, 01 Jun 2004 22:46:52 -0400
To: Clive Levinson <clivel AT bundu DOT com>, cygwin AT cygwin DOT com
From: Larry Hall <cygwin-lh AT cygwin DOT com>
Subject: Re: gcc Unicode and _WinMain AT 16
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At 03:17 AM 6/1/2004, you wrote:
>Hi,
>I have a simple Windows app that I am building using gcc:
>
>gcc -c -Wall -mno-cygwin  app.cpp -o app.o
>windres -i resource.rc -o resource.o
>gcc  -Wall -mno-cygwin app.o -o app.exe resource.o -s -mwindows
>
>The app entry is:
>int WINAPI WinMain(HINSTANCE instance,HINSTANCE prevInstance,LPTSTR cmdLine,int cmdShow)
>
>This compiles,builds, and executes fine.
>
>However, I need to build a Unicode version of the app. The only change I made
>was to define UNICODE & _UNICODE before including windows.h. It compiles, but
>when linking I get the error:
>main.c: undefined reference to `_WinMain AT 16'
>
>If anyone can please help, it would be most appreciated.


This is really a question for the MinGW list at mingw.org.  You're using
the -mno-cygwin switch to gcc which means you're not using Cygwin.  By
definition, this fact makes the question off-topic for this list.  If 
you google around a bit though, you'll probably find out why you get this
problem.  Setting UNICODE changes the provided entry point to
wWinMainCRTStartup.  You'll need to specify this entry point explicitly 
in your link line to get it to build properly.



--
Larry Hall                              http://www.rfk.com
RFK Partners, Inc.                      (508) 893-9779 - RFK Office
838 Washington Street                   (508) 893-9889 - FAX
Holliston, MA 01746                     


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