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From:	"Vance Miller" <vancemiller AT pobox DOT com>
To:	<cygwin AT cygwin DOT com>
Subject:	Additional Info on undefined reference to `_WinMain AT 16'
Date:	Tue, 29 Jul 2003 14:26:43 -0700
Message-ID:	<000401c35618$1b96d720$8300a8c0@QUATTRO4>
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Sorry if this info seems a bit too basic, but I spent several hours last
night trying to resolve a linking error while compiling with gcc on Cygwin.

G++ version 3.2 20020927 (prerelease)
Cygwin Net Release 2.340.2.5 installed via the net 2 weeks ago.

Being new to namespaces, I thought it made sense to place my main() within a
named space. This caused the linking error when no main() in the std (or
global) space was available. See below:


$ cat test.cpp
// filename test.cpp
namespace my_namespace
{
int main()
   {
   return 0;
   }
}


Owner AT QUATTRO4 ~/project1/p1
$ g++ test.cpp
/usr/lib/gcc-lib/i686-pc-cygwin/3.2/../../../libcygwin.a(libcmain.o)(.text+0
x7c)
: undefined reference to `_WinMain AT 16'
collect2: ld returned 1 exit status

This fix was simple enough:

$ cat test.cpp
// filename test.cpp

using my_namespace::CLASS;

int main()
   {
   return 0;
   }

I hope this helps someone.

Vance

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