# DP: Fix PR other/61257, check for working sys/sdt.h

Index: b/src/gcc/configure.ac
===================================================================
--- a/src/gcc/configure.ac
+++ b/src/gcc/configure.ac
@@ -5060,9 +5060,13 @@ GCC_TARGET_TEMPLATE([HAVE_SYS_SDT_H])
 AC_MSG_CHECKING(sys/sdt.h in the target C library)
 have_sys_sdt_h=no
 if test -f $target_header_dir/sys/sdt.h; then
-  have_sys_sdt_h=yes
-  AC_DEFINE(HAVE_SYS_SDT_H, 1,
-            [Define if your target C library provides sys/sdt.h])
+  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/sdt.h>]],
+                                     [[DTRACE_PROBE(foo,bar); return 0;]])
+                    ],[
+                     have_sys_sdt_h=yes
+                     AC_DEFINE(HAVE_SYS_SDT_H, 1,
+                       [Define if your target C library provides sys/sdt.h])
+                    ])
 fi
 AC_MSG_RESULT($have_sys_sdt_h)