From 5fe984a8de70773ef7b9a617702d0091a968e77f Mon Sep 17 00:00:00 2001
From: Laurin-Luis Lehning <65224843+e820@users.noreply.github.com>
Date: Thu, 4 Mar 2021 19:55:31 +0100
Subject: [PATCH] Fix the primitive system dependency discovery for Darwin
 systems

---
 lib/configure | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/configure b/lib/configure
index e181b7f..77a0816 100755
--- a/lib/configure
+++ b/lib/configure
@@ -62,6 +62,7 @@ echo >$m 'WITH_LIBS='
 echo_n "Looking for access methods..."
 LIBRESOLV=-lresolv
 LIBEXT=so
+MACSDKROOT=
 
 case $sys in
 	linux*)
@@ -112,6 +113,7 @@ case $sys in
 		echo >>$c '#define PCI_HAVE_64BIT_ADDRESS'
 		LIBRESOLV=
 		LIBEXT=dylib
+		MACSDKROOT=$(xcrun --sdk macosx --show-sdk-path)
 		;;
 	aix)
 		echo_n " aix-device"
@@ -172,7 +174,7 @@ echo_n "Checking for zlib support... "
 if [ "$ZLIB" = yes -o "$ZLIB" = no ] ; then
 	echo "$ZLIB (set manually)"
 else
-	if [ -f /usr/include/zlib.h -o -f /usr/local/include/zlib.h ] ; then
+	if [ -f "$MACSDKROOT"/usr/include/zlib.h -o -f /usr/local/include/zlib.h ] ; then
 		ZLIB=yes
 	else
 		ZLIB=no
@@ -193,7 +195,7 @@ echo_n "Checking for DNS support... "
 if [ "$DNS" = yes -o "$DNS" = no ] ; then
 	echo "$DNS (set manually)"
 else
-	if [ -f /usr/include/resolv.h ] ; then
+	if [ -f "$MACSDKROOT"/usr/include/resolv.h ] ; then
 		DNS=yes
 	else
 		DNS=no
-- 
2.39.2