new file mode 100644
--- /dev/null
+++ b/auto/lib/libatomic/conf
@@ -0,0 +1,38 @@
+
+# Copyright (C) Igor Sysoev
+
+
+if [ $NGX_LIBATOMIC != YES ]; then
+
+    have=NGX_HAVE_LIBATOMIC . auto/have
+    CORE_INCS="$CORE_INCS $NGX_LIBATOMIC/src"
+    LINK_DEPS="$LINK_DEPS $NGX_LIBATOMIC/src/libatomic_ops.a"
+    CORE_LIBS="$CORE_LIBS $NGX_LIBATOMIC/src/libatomic_ops.a"
+
+else
+
+    ngx_feature="atomic_ops library"
+    ngx_feature_name=NGX_HAVE_LIBATOMIC
+    ngx_feature_run=no
+    ngx_feature_incs="#include <atomic_ops.h>"
+    ngx_feature_path=
+    ngx_feature_libs="-latomic_ops"
+    ngx_feature_test="AO_t *n;
+                      AO_compare_and_swap(n, 0, 1);
+                      AO_fetch_and_add(n, 1);
+                      AO_nop();"
+
+    . auto/feature
+
+    if [ $ngx_found = yes ]; then
+        CORE_LIBS="$CORE_LIBS $ngx_feature_libs"
+    else
+
+cat << END
+
+$0: error: libatomic_ops library was not found.
+
+END
+        exit 1
+    fi
+fi