From cfde89ab66cb4e5957b1c4b68ad6a9449e2784da Mon Sep 17 00:00:00 2001

From: Roy Marples <roy@marples.name>

Date: Fri, 19 Apr 2019 21:42:07 +0100

Subject: [PATCH] compat: Provide consttime_memequal if not in libc

Public domain version by Matthias Drochner <drochner@netbsd.org>

---

 configure | 22 ++++++++++++++++++++++

 1 file changed, 22 insertions(+)

diff --git a/configure b/configure

index 570e65f2..4f58f0f3 100755

--- a/configure

+++ b/configure

@@ -13,6 +13,7 @@ IPV4LL=

 INET6=

 ARC4RANDOM=

 CLOSEFROM=

+CONSTTIME_MEMEQUAL=

 STRLCPY=

 UDEV=

 OS=

@@ -846,6 +847,27 @@ if [ "$STRTOI" = no ]; then

 	echo "#include			\"compat/strtoi.h\"" >>$CONFIG_H

 fi

+if [ -z "$CONSTTIME_MEMEQUAL" ]; then

+	printf "Testing for consttime_memequal ... "

+	cat <<EOF >_consttime_memequal.c

+#include <string.h>

+int main(void) {

+	return consttime_memequal("deadbeef", "deadbeef", 8);

+}

+EOF

+	if $XCC _consttime_memequal.c -o _consttime_memequal 2>&3; then

+		CONSTTIME_MEMEQUAL=yes

+	else

+		CONSTTIME_MEMEQUAL=no

+	fi

+	echo "$CONSTTIME_MEMEQUAL"

+	rm -f _consttime_memequal.c _consttime_memequal

+fi

+if [ "$CONSTTIME_MEMEQUAL" = no ]; then

+	echo "#include			\"compat/consttime_memequal.h\"" \

+	    >>$CONFIG_H

+fi

+

 if [ -z "$DPRINTF" ]; then

 	printf "Testing for dprintf ... "

 	cat <<EOF >_dprintf.c

-- 

2.21.0