diff -r b9b521efeba3 Lib/distutils/cygwinccompiler.py
--- a/Lib/distutils/cygwinccompiler.py	Sat May 18 17:56:42 2013 +0200
+++ b/Lib/distutils/cygwinccompiler.py	Mon Jun 24 12:20:07 2013 +0100
@@ -291,13 +291,18 @@
         else:
             entry_point = ''
 
-        self.set_executables(compiler='gcc -mno-cygwin -O -Wall',
-                             compiler_so='gcc -mno-cygwin -mdll -O -Wall',
-                             compiler_cxx='g++ -mno-cygwin -O -Wall',
-                             linker_exe='gcc -mno-cygwin',
-                             linker_so='%s -mno-cygwin %s %s'
-                                        % (self.linker_dll, shared_option,
-                                           entry_point))
+        if self.gcc_version < '4' or is_cygwingcc():
+            no_cygwin = ' -mno-cygwin'
+        else:
+            no_cygwin = ''
+
+        self.set_executables(compiler='gcc%s -O -Wall' % no_cygwin,
+                             compiler_so='gcc%s -mdll -O -Wall' % no_cygwin,
+                             compiler_cxx='g++%s -O -Wall' % no_cygwin,
+                             linker_exe='gcc%s' % no_cygwin,
+                             linker_so='%s%s %s %s'
+                                    % (self.linker_dll, no_cygwin,
+                                       shared_option, entry_point))
         # Maybe we should also append -mthreads, but then the finished
         # dlls need another dll (mingwm10.dll see Mingw32 docs)
         # (-mthreads: Support thread-safe exception handling on `Mingw32')
@@ -390,3 +395,15 @@
     """
     commands = ['gcc -dumpversion', 'ld -v', 'dllwrap --version']
     return tuple([_find_exe_version(cmd) for cmd in commands])
+
+def is_cygwingcc():
+    '''Try to determine if the gcc that would be used is from cygwin.'''
+    from subprocess import Popen, PIPE
+    out = Popen(['gcc', '-dumpmachine'], shell=True, stdout=PIPE).stdout
+    try:
+        out_string = out.read()
+    finally:
+        out.close()
+    # out_string is the target triplet cpu-vendor-os
+    # Cygwin's gcc sets the os to 'cygwin'
+    return out_string.decode('ascii').strip().endswith('cygwin')