2012-09-12  Teresa Johnson  <tejohnson@google.com>

	PR gcov-profile/54487
	* configure.ac (HOST_HAS_F_SETLKW): Set based on compile
	test using F_SETLKW with fcntl.
	* configure, config.in: Regenerate.

--- gcc/configure.ac	(revision 191237)
+++ gcc/configure.ac	(revision 191238)
@@ -1146,6 +1146,22 @@ if test $gcc_cv_type_clock_t = yes; then
   [Define if <time.h> defines clock_t.])
 fi
 
+# Check if F_SETLKW is supported by fcntl.
+AC_CACHE_CHECK(for F_SETLKW, ac_cv_f_setlkw, [
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <fcntl.h>]], [[
+struct flock fl;
+fl.l_whence = 0;
+fl.l_start = 0;
+fl.l_len = 0;
+fl.l_pid = 0;
+return fcntl (1, F_SETLKW, &fl);]])],
+[ac_cv_f_setlkw=yes],[ac_cv_f_setlkw=no])])
+if test $ac_cv_f_setlkw = yes; then
+  AC_DEFINE(HOST_HAS_F_SETLKW, 1,
+  [Define if F_SETLKW supported by fcntl.])
+fi
+
 # Restore CFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
 CFLAGS="$saved_CFLAGS"
 
--- gcc/configure	(revision 191237)
+++ gcc/configure	(revision 191238)
@@ -13271,6 +13271,76 @@ _ACEOF
 
 fi
 
+# Check if F_SETLKW is supported by fcntl.
+echo "$as_me:$LINENO: checking for F_SETLKW" >&5
+echo $ECHO_N "checking for F_SETLKW... $ECHO_C" >&6
+if test "${ac_cv_f_setlkw+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+#include <fcntl.h>
+int
+main ()
+{
+
+struct flock fl;
+fl.l_whence = 0;
+fl.l_start = 0;
+fl.l_len = 0;
+fl.l_pid = 0;
+return fcntl (1, F_SETLKW, &fl);
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_f_setlkw=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_f_setlkw=no
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: $ac_cv_f_setlkw" >&5
+echo "${ECHO_T}$ac_cv_f_setlkw" >&6
+if test $ac_cv_f_setlkw = yes; then
+
+cat >>confdefs.h <<\_ACEOF
+#define HOST_HAS_F_SETLKW 1
+_ACEOF
+
+fi
+
 # Restore CFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
 CFLAGS="$saved_CFLAGS"
 
--- gcc/config.in	(revision 191237)
+++ gcc/config.in	(revision 191238)
@@ -1398,6 +1398,12 @@
 #endif
 
 
+/* Define if F_SETLKW supported by fcntl. */
+#ifndef USED_FOR_TARGET
+#undef HOST_HAS_F_SETLKW
+#endif
+
+
 /* Define as const if the declaration of iconv() needs const. */
 #ifndef USED_FOR_TARGET
 #undef ICONV_CONST