From bb6256c5a2983557e956c0244d844bbd5dbb3e0c Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Mon, 12 Oct 2015 19:20:29 +1100
Subject: [PATCH] m4: bump for autocruft

---
 m4/nc_optimisation.m4 | 12 ++++++++++++
 m4/nc_warnings.m4     |  1 +
 2 files changed, 13 insertions(+)

diff --git a/m4/nc_optimisation.m4 b/m4/nc_optimisation.m4
index 194c5272..4d266634 100644
--- a/m4/nc_optimisation.m4
+++ b/m4/nc_optimisation.m4
@@ -32,6 +32,18 @@ AC_DEFUN([NC_OPTIMISATION],[
         AX_APPEND_COMPILE_FLAGS([-fdevirtualize-at-ltrans], [], [-Werror])
     ])
 
+    ##-------------------------------------------------------------------------
+    ## Enable frame pointer
+
+    AC_ARG_ENABLE([frame-pointer], [
+        AS_HELP_STRING([--enable-frame-pointer], [retain the frame pointer even if optimising])
+    ])
+
+    AS_IF([test "x$enable_frame_pointer" = "xyes"], [
+        AX_APPEND_COMPILE_FLAGS([-fno-omit-frame-pointer], [], [-Werror])
+    ])
+
+
     ##-------------------------------------------------------------------------
     ## Choose the most performant processor architecture and features
 
diff --git a/m4/nc_warnings.m4 b/m4/nc_warnings.m4
index 9f16183d..4a141e85 100644
--- a/m4/nc_warnings.m4
+++ b/m4/nc_warnings.m4
@@ -33,6 +33,7 @@ AC_DEFUN([NC_WARNINGS],[
     AX_APPEND_COMPILE_FLAGS([-Wunused-but-set-variable], [], [-Werror])
     AX_APPEND_COMPILE_FLAGS([-Wunused-parameter], [], [-Werror])
     AX_APPEND_COMPILE_FLAGS([-Wuseless-cast], [], [-Werror])
+    AX_APPEND_COMPILE_FLAGS([-Wpessimizing-move], [], [-Werror])
 
     # -------------------------------------------------------------------------
     # Required extensions