From c8532ae7a9f55f333165db8bcd759410445e62e0 Mon Sep 17 00:00:00 2001
From: "Todd C. Miller" <Todd.Miller@sudo.ws>
Date: Wed, 25 Dec 2019 11:21:49 -0700
Subject: [PATCH] Enable OpenBSD extensions on NetBSD to get reallocarray(3)
 prototype.

---
 config.h.in  | 5 +++++
 configure    | 4 ++++
 configure.ac | 8 ++++++++
 3 files changed, 17 insertions(+)

diff --git a/config.h.in b/config.h.in
index 7966d5559..412f9b8bd 100644
--- a/config.h.in
+++ b/config.h.in
@@ -1286,6 +1286,11 @@
 # undef _BSD_SOURCE
 #endif
 
+/* Enable OpenBSD extensions on NetBSD.  */
+#ifndef _OPENBSD_SOURCE
+# undef _OPENBSD_SOURCE
+#endif
+
 /* Enable BSD types on IRIX.  */
 #ifndef _BSD_TYPES
 # undef _BSD_TYPES
diff --git a/configure b/configure
index 924a20d8e..1ff27230a 100755
--- a/configure
+++ b/configure
@@ -16284,6 +16284,10 @@ done
 		test -z "$with_pam" && AUTH_EXCL_DEF="PAM"
 		: ${with_logincap='maybe'}
 
+		# For reallocarray()
+		$as_echo "#define _OPENBSD_SOURCE 1" >>confdefs.h
+
+
 		# Examples go in share/examples/sudo
 		if test X"$with_exampledir" = X""; then
 		    exampledir='$(datarootdir)/examples/$(PACKAGE_TARNAME)'
diff --git a/configure.ac b/configure.ac
index 18c5fc234..3eea639da 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2189,6 +2189,9 @@ case "$host" in
 		test -z "$with_pam" && AUTH_EXCL_DEF="PAM"
 		: ${with_logincap='maybe'}
 
+		# For reallocarray()
+		AC_DEFINE([_OPENBSD_SOURCE])
+
 		# Examples go in share/examples/sudo
 		if test X"$with_exampledir" = X""; then
 		    exampledir='$(datarootdir)/examples/$(PACKAGE_TARNAME)'
@@ -4737,6 +4740,11 @@ AH_BOTTOM([/* BSD compatibility on some SVR4 systems. */
 # undef _BSD_SOURCE
 #endif
 
+/* Enable OpenBSD extensions on NetBSD.  */
+#ifndef _OPENBSD_SOURCE
+# undef _OPENBSD_SOURCE
+#endif
+
 /* Enable BSD types on IRIX.  */
 #ifndef _BSD_TYPES
 # undef _BSD_TYPES