+# sdt.h integration
+AC_ARG_WITH([sdt],
+ [AS_HELP_STRING([--with-sdt],[provide DTrace, GDB and SystemTap integration via sdt.h [default=no]])],
+ [with_sdt=$withval],
+ [with_sdt="no"]
+)
+
+AS_IF([test "x$with_sdt" = "xyes"],[
+ AC_CHECK_HEADERS([sys/sdt.h], [
+ AC_DEFINE([HAVE_SDT_INTEGRATION], [1])
+ ],[
+ AC_MSG_ERROR([The sdt.h integration was requested
+but this header file cannot be found. Make sure it is installed
+or use CFLAGS=-I/path/ to specify a non-standard path to sys/sdt.h])
+ ])
+])
+