To get DevC++ to work with the new cygwin compiler

You need to change your autoexec.bat to this:

SET PATH=C:\cygwin\bin;%PATH%
SET C_INCLUDE_PATH=C:\cygwin\include
SET CPP_INCLUDE_PATH=C:\cygwin\include\g++;C:\cygwin\include
SET GCC_EXEC_PREFIX=C:\cygwin\lib\gcc-lib
SET LIBRARY_PATH=C:\cygwin\lib

In DevC++ you need to go to Options/Compiler Options

Bin Directory        c:\cygwin\bin\

Include Files         . (a period)

C++ Include Files . (a period)

Libraries Directory.\ (a period and backslash)

I also updated my IDE link on my homepage to directly link to the DevC++ download site. At the time I wrote this DevC++ had a latest version of 4.01

I have included a link to Dev-C++ (called C++ Compiler IDE) on my main page. At the Dev-C++ site, go to latest version and download the Dev-C++ without compiler and the latest version 4.01. 

After you download, you can use the install option in Winzip for installing Dev-C++ and you can use Winzip to extract the 4.01 version to your Dev-C++ directory.