cygwin: libatomic_ops: add missing interlibrary dep

pkgs/development/libraries/libatomic_ops/default.nix

···
-{stdenv, fetchurl}:
+{ stdenv, fetchurl, autoconf, automake, libtool }:
 let
   s = # Generated upstream information
   rec {
···
     url="http://www.ivmaisoft.com/_bin/atomic_ops/libatomic_ops-7.4.2.tar.gz";
     sha256="1pdm0h1y7bgkczr8byg20r6bq15m5072cqm5pny4f9crc9gn3yh4";
   };
-  buildInputs = [
-  ];
-in
-stdenv.mkDerivation {
+  
+  buildInputs = stdenv.lib.optionals stdenv.isCygwin [ autoconf automake libtool ];
+
+in stdenv.mkDerivation {
   inherit (s) name version;
   inherit buildInputs;
+
   src = fetchurl {
     inherit (s) url sha256;
   };
+
+  preConfigure = if stdenv.isCygwin then ''
+      sed -i -e "/libatomic_ops_gpl_la_SOURCES/a libatomic_ops_gpl_la_LIBADD = libatomic_ops.la" src/Makefile.am
+      ./autogen.sh
+  '' else null;
+
   meta = {
     inherit (s) version;
     description = ''A library for semi-portable access to hardware-provided atomic memory update operations'';