Okay, maybe FreeBSD will like this better.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@115159 65c4cc65-6c06-0410-ace0-fbb531ad65f3

configure

 #! /bin/sh
-# From configure.ac Revision: 114713 .
+# From configure.ac Revision: 115078 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.61 for asterisk 1.6.
 #
@@ -16863,6 +16863,58 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+{ echo "$as_me:$LINENO: checking for compiler 'attribute sentinel' support" >&5
+echo $ECHO_N "checking for compiler 'attribute sentinel' support... $ECHO_C" >&6; }
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+static int __attribute__((sentinel)) test(void) {}
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$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 $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  { echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6; }
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_ATTRIBUTE_sentinel 1
+_ACEOF
+
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	{ echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6; }
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+
 { echo "$as_me:$LINENO: checking for -ffunction-sections support" >&5
 echo $ECHO_N "checking for -ffunction-sections support... $ECHO_C" >&6; }
 saved_CFLAGS="${CFLAGS}"

configure.ac

@@ -437,6 +437,7 @@ AST_GCC_ATTRIBUTE(const)
 AST_GCC_ATTRIBUTE(unused)
 AST_GCC_ATTRIBUTE(always_inline)
 AST_GCC_ATTRIBUTE(deprecated)
+AST_GCC_ATTRIBUTE(sentinel)
 
 AC_MSG_CHECKING(for -ffunction-sections support)
 saved_CFLAGS="${CFLAGS}"

include/asterisk/autoconfig.h.in

@@ -104,6 +104,9 @@
 /* Define to 1 if your GCC C compiler supports the 'pure' attribute. */
 #undef HAVE_ATTRIBUTE_pure
 
+/* Define to 1 if your GCC C compiler supports the 'sentinel' attribute. */
+#undef HAVE_ATTRIBUTE_sentinel
+
 /* Define to 1 if your GCC C compiler supports the 'unused' attribute. */
 #undef HAVE_ATTRIBUTE_unused
 

include/asterisk/compiler.h

@@ -53,4 +53,10 @@
 #define attribute_malloc
 #endif
 
+#if HAVE_ATTRIBUTE_sentinel
+#define attribute_sentinel __attribute__((sentinel))
+#else
+#define attribute_sentinel
+#endif
+
 #endif /* _ASTERISK_COMPILER_H */

include/asterisk/config.h

@@ -182,8 +182,8 @@ int ast_category_exist(const struct ast_config *config, const char *category_nam
  * that unlike the variables in ast_config, the resulting list of variables
  * MUST be freed with ast_variables_destroy() as there is no container.
  */
-struct ast_variable *ast_load_realtime(const char *family, ...) __attribute__((sentinel));
-struct ast_variable *ast_load_realtime_all(const char *family, ...) __attribute__((sentinel));
+struct ast_variable *ast_load_realtime(const char *family, ...) attribute_sentinel;
+struct ast_variable *ast_load_realtime_all(const char *family, ...) attribute_sentinel;
 
 /*! 
  * \brief Retrieve realtime configuration 
@@ -194,7 +194,7 @@ struct ast_variable *ast_load_realtime_all(const char *family, ...) __attribute_
  * is thus stored inside a taditional ast_config structure rather than 
  * just returning a linked list of variables.
  */
-struct ast_config *ast_load_realtime_multientry(const char *family, ...) __attribute__((sentinel));
+struct ast_config *ast_load_realtime_multientry(const char *family, ...) attribute_sentinel;
 
 /*! 
  * \brief Update realtime configuration 
@@ -204,7 +204,7 @@ struct ast_config *ast_load_realtime_multientry(const char *family, ...) __attri
  * This function is used to update a parameter in realtime configuration space.
  *
  */
-int ast_update_realtime(const char *family, const char *keyfield, const char *lookup, ...) __attribute__((sentinel));
+int ast_update_realtime(const char *family, const char *keyfield, const char *lookup, ...) attribute_sentinel;
 
 /*! 
  * \brief Create realtime configuration 
@@ -212,7 +212,7 @@ int ast_update_realtime(const char *family, const char *keyfield, const char *lo
  * This function is used to create a parameter in realtime configuration space.
  *
  */
-int ast_store_realtime(const char *family, ...) __attribute__((sentinel));
+int ast_store_realtime(const char *family, ...) attribute_sentinel;
 
 /*! 
  * \brief Destroy realtime configuration 
@@ -223,7 +223,7 @@ int ast_store_realtime(const char *family, ...) __attribute__((sentinel));
  * Additional params are used as keys.
  *
  */
-int ast_destroy_realtime(const char *family, const char *keyfield, const char *lookup, ...) __attribute__((sentinel));
+int ast_destroy_realtime(const char *family, const char *keyfield, const char *lookup, ...) attribute_sentinel;
 
 /*! 
  * \brief Check if realtime engine is configured for family