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Message-ID: <004a01c600cd$6985cd30$0300a8c0@Piero>
From: "Piero Silvestri" <psilvestri AT omnicad DOT com>
To: <cygwin AT cygwin DOT com>
Subject: CygWin + gcc to build Windows application written in C.
Date: Wed, 14 Dec 2005 17:42:44 +0100
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Hi all,

I'm a software developer and I'm working on an application entirely written 
in C, that's been built with Watcom compiler until now, and whose only 
target was Windows (NT/2000/XP). I need to port it to Linux and some other 
Unix-like OS, so I decided to go for Qt, a multiplatform library that seems 
good for my needs. This choice forced me to change my compiler, so I decided 
to use gcc.

Therefore my goal at the moment is to build my application with gcc, and 
make it run on a Windows OS; the next step will be to use Qt for removing 
all the OS dependencies and then to switch on Linux. So I downloaded and 
installed the latest version of Cygwin to have a shell from which to run gcc 
(I'm working on a PC whose only OS is Windows 2000 Professional), but I'm a 
little confused about some point...

- I'm looking for some documentation about -mno-cygwin and -mwindows 
options, which I can't find neither in the gcc on-line manual, nor in the 
gcc man pages, nor in the CygWin manual. Where they come from? Using the 
first makes the compiler complain about a missing crt2.o (?), the last seems 
to be ignored.
- I have a mysterious linker error (undefined reference to __imp___iob); I 
searched the web and found some hints about using MinGW under Cygwin, but 
nothing clear or certain; above all, only questions but not answers...

I hope someone can help me.

Thanks in advance,
Piero Silvestri.


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