build: Add declaration checks to check for required syscall flags
The required flags are relatively new and some older enterprise
distributions do not feature them.
https://bugs.freedesktop.org/show_bug.cgi?id=63360
diff --git a/configure.ac b/configure.ac
index ba1fcac..848ff92 100644
--- a/configure.ac
+++ b/configure.ac
@@ -39,6 +39,15 @@
AC_CHECK_LIB([dl], [dlopen], DLOPEN_LIBS="-ldl"))
AC_SUBST(DLOPEN_LIBS)
+AC_CHECK_DECL(SFD_CLOEXEC,[],
+ [AC_MSG_ERROR("SFD_CLOEXEC is needed to compile weston")],
+ [[#include <sys/signalfd.h>]])
+AC_CHECK_DECL(TFD_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_CHECK_FUNCS([mkostemp strchrnul])