ADDED   aclocal/ax_check_link_flag.m4
Index: aclocal/ax_check_link_flag.m4
==================================================================
--- /dev/null
+++ aclocal/ax_check_link_flag.m4
@@ -0,0 +1,53 @@
+# ===========================================================================
+#    https://www.gnu.org/software/autoconf-archive/ax_check_link_flag.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_CHECK_LINK_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])
+#
+# DESCRIPTION
+#
+#   Check whether the given FLAG works with the linker or gives an error.
+#   (Warnings, however, are ignored)
+#
+#   ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
+#   success/failure.
+#
+#   If EXTRA-FLAGS is defined, it is added to the linker's default flags
+#   when the check is done.  The check is thus made with the flags: "LDFLAGS
+#   EXTRA-FLAGS FLAG".  This can for example be used to force the linker to
+#   issue an error when a bad flag is given.
+#
+#   INPUT gives an alternative input source to AC_LINK_IFELSE.
+#
+#   NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
+#   macro in sync with AX_CHECK_{PREPROC,COMPILE}_FLAG.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
+#   Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
+#
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved.  This file is offered as-is, without any
+#   warranty.
+
+#serial 6
+
+AC_DEFUN([AX_CHECK_LINK_FLAG],
+[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
+AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_ldflags_$4_$1])dnl
+AC_CACHE_CHECK([whether the linker accepts $1], CACHEVAR, [
+  ax_check_save_flags=$LDFLAGS
+  LDFLAGS="$LDFLAGS $4 $1"
+  AC_LINK_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
+    [AS_VAR_SET(CACHEVAR,[yes])],
+    [AS_VAR_SET(CACHEVAR,[no])])
+  LDFLAGS=$ax_check_save_flags])
+AS_VAR_IF(CACHEVAR,yes,
+  [m4_default([$2], :)],
+  [m4_default([$3], :)])
+AS_VAR_POPDEF([CACHEVAR])dnl
+])dnl AX_CHECK_LINK_FLAGS

Index: autogen.sh
==================================================================
--- autogen.sh
+++ autogen.sh
@@ -14,10 +14,11 @@
 urls=(
 	http://chiselapp.com/user/rkeene/repository/autoconf/doc/trunk/tcl.m4
 	http://chiselapp.com/user/rkeene/repository/autoconf/doc/trunk/shobj.m4
 	http://chiselapp.com/user/rkeene/repository/autoconf/doc/trunk/versionscript.m4
 	'http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_check_compile_flag.m4'
+	'http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_check_link_flag.m4'
 )
 
 localFiles=(
 )
 

Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -54,11 +54,15 @@
 ])
 
 dnl If we are building a debug release, enable debugging flags
 if test "$tcl_nano_debug" = 'true'; then
 	AC_DEFINE(TCLEXT_TCL_NANO_DEBUG, [1], [Enable debugging build])
-	AX_CHECK_COMPILE_FLAG([-mmpx -fcheck-pointer-bounds], [CFLAGS="$CFLAGS -mmpx -fcheck-pointer-bounds"])
+	AX_CHECK_COMPILE_FLAG([-mmpx -fcheck-pointer-bounds], [
+		AX_CHECK_LINK_FLAG([-mmpx -fcheck-pointer-bounds], [
+			CFLAGS="$CFLAGS -mmpx -fcheck-pointer-bounds"
+		])
+	])
 	AX_CHECK_COMPILE_FLAG([-g3], [CFLAGS="$CFLAGS -g3"])
 	AX_CHECK_COMPILE_FLAG([-ggdb3], [CFLAGS="$CFLAGS -ggdb3"])
 else
 	dnl If we are not doing debugging disable some of the more annoying warnings
 	AX_CHECK_COMPILE_FLAG([-Wno-unused-value], [CFLAGS="$CFLAGS -Wno-unused-value"])