$NetBSD: patch-configure.ac,v 1.4 2017/04/23 08:18:15 adam Exp $

Avoid -fstack-protector, it is not portable.
Redefine MYPATH to avoid build directory references.
Detect dirfd() and setprogname() functions.

--- configure.ac.orig	2016-11-02 08:42:29.000000000 +0000
+++ configure.ac
@@ -37,7 +37,7 @@ fi
 AS=${AS-as}
 AC_SUBST(AS)
 if test "$GCC" = yes; then
-    cflags_to_try="-fno-strict-aliasing -fstack-protector -Wempty-body"
+    cflags_to_try="-fno-strict-aliasing -Wempty-body"
     AC_MSG_CHECKING([supported compiler flags])
     old_cflags=$CFLAGS
     echo
@@ -84,7 +84,7 @@ dnl
 if test "$cross_compiling" = "yes"; then
     MYPATH=":"
 else
-    MYPATH=$PATH
+    MYPATH=$MYPATH
 fi
 
 dnl
@@ -547,6 +547,8 @@ AC_CHECK_FUNCS(fdatasync)
 AC_CHECK_FUNCS(lutimes)
 AC_CHECK_FUNCS(mergesort)
 AC_CHECK_FUNCS(getauxval)
+AC_CHECK_FUNCS(dirfd)
+AC_CHECK_FUNCS(setprogname)
 
 AC_REPLACE_FUNCS(stpcpy stpncpy)