Merge branch 'linux-port-hdd' of github.ibm.com:ibmswift/swift-corelibs-libdispatch into linux-port-hdd

Author: frankeh

CONTRIBUTING.md

@@ -0,0 +1,10 @@
+By submitting a pull request, you represent that you have the right to license
+your contribution to Apple and the community, and agree by submitting the patch
+that your contributions are licensed under the [Swift
+license](https://swift.org/LICENSE.txt).
+
+---
+
+Before submitting the pull request, please make sure you have tested your
+changes and that they follow the Swift project [guidelines for contributing
+code](https://swift.org/contributing/#contributing-code).

configure.ac

@@ -137,9 +137,14 @@ AC_SEARCH_LIBS(pthread_create, pthread)
 # Prefer native kqueue(2); otherwise use libkqueue if present.
 #
 AC_CHECK_HEADER(sys/event.h, [],
-  [PKG_CHECK_MODULES(KQUEUE, libkqueue)]
+  [PKG_CHECK_MODULES(KQUEUE, libkqueue)
+   AC_SEARCH_LIBS(kevent, kqueue)
+   AC_SEARCH_LIBS(kevent64, kqueue,
+                 [AC_DEFINE(HAVE_KEVENT64, 1, [Define if kevent64 is present])],
+                 [AC_DEFINE(HAVE_KEVENT64, 0, [Define if kevent64 is present])])]
 )
 
+
 #
 # Checks for header files.
 #