$OpenBSD: patch-configure,v 1.1.1.1 2018/07/11 15:09:00 chrisz Exp $

Index: configure
--- configure.orig
+++ configure
@@ -292,7 +292,7 @@ fi
 
 arch='none'
 case $host in
-    x86_64-*linux-gnu|x86_64-kfreebsd-gnu)
+    x86_64-*linux-gnu|x86_64-kfreebsd-gnu|amd64-*-openbsd*)
         ccdef="-DZ_ELF -DZ_DOT_LABEL_PREFIX $ccdef"
         arch='x86_64';;
     i486-*linux-gnu|i686-*linux-gnu|i486-kfreebsd-gnu)
@@ -307,7 +307,7 @@ case $host in
             arch='i686'
         fi
 	;;
-    i386-*darwin* | x86_64-*darwin*)
+    i386-*darwin* | x86_64-*darwin* | i386-*-openbsd*)
         ccdef="-DZ_UNDERSCORE_PREFIX -DZ_MACOS $ccdef"
         if test "x$wordsize" = "x64"; then
             ccopt="-arch x86_64 $ccopt"
@@ -321,7 +321,7 @@ case $host in
             checkcc
         fi
         ;;
-    armv7*-gnueabi)
+    armv7*-gnueabi | armv7-*-openbsd*)
         arch='arm'
         ;;
     none)
