Merge pull request #209 from DWesl/patch-3

Port code from CygwinCCompiler to UnixCCompiler

Author: jaraco

distutils/unixccompiler.py

@@ -144,6 +144,9 @@ class UnixCCompiler(CCompiler):
     xcode_stub_lib_format = dylib_lib_format
     if sys.platform == "cygwin":
         exe_extension = ".exe"
+        shared_lib_extension = ".dll.a"
+        dylib_lib_extension = ".dll"
+        dylib_lib_format = "cyg%s%s"
 
     def preprocess(
         self,