[PATCH wayland] build: Add declaration checks to check for required syscall flags

[Rob Bradford]

From: Rob Bradford <rob at linux.intel.com>

The required flags are relatively new and some older enterprise distributions
do not feature them.

https://bugs.freedesktop.org/show_bug.cgi?id=63360
---
 configure.ac | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/configure.ac b/configure.ac
index f317a73..d4c58e6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -41,6 +41,17 @@ AC_SUBST(GCC_CFLAGS)
 
 AC_CHECK_FUNCS([accept4 mkostemp])
 
+AC_CHECK_DECL(SFD_CLOEXEC,[],
+	      [AC_MSG_ERROR("SFD_CLOEXEC is needed to compile weston")],
+	      [[#include <sys/signalfd.h>]])
+AC_CHECK_DECL(SFD_CLOEXEC,[],
+	      [AC_MSG_ERROR("TFD_CLOEXEC is needed to compile weston")],
+	      [[#include <sys/timerfd.h>]])
+AC_CHECK_DECL(CLOCK_MONOTONIC,[],
+	      [AC_MSG_ERROR("CLOCK_MONOTONIC is needed to compile weston")],
+	      [[#include <time.h>]])
+AC_CHECK_HEADERS([execinfo.h])
+
 AC_ARG_ENABLE([scanner],
               [AC_HELP_STRING([--disable-scanner],
                               [Disable compilation of wayland-scanner])],
-- 
1.8.1.4