--- configure.orig	2013-06-12 07:13:59.000000000 +0000
+++ configure
@@ -304,6 +304,14 @@ case $host in
             arch='i686'
         fi
 	;;
+    i386-*freebsd* | i386-*dragonfly*)
+        ccdef="-DZ_ELF -DZ_DOT_LABEL_PREFIX $ccdef"
+        arch='i686'
+        ;;
+    amd64-*freebsd* | x86_64-*dragonfly*)
+        ccdef="-DZ_ELF -DZ_DOT_LABEL_PREFIX $ccdef"
+        arch='x86_64'
+        ;;
     i386-*darwin* | x86_64-*darwin*)
         ccdef="-DZ_UNDERSCORE_PREFIX -DZ_MACOS $ccdef"
         if test "x$wordsize" = "x64"; then
@@ -401,7 +409,7 @@ CFLAGS=$ccinc $ccdef $ccopt
 ASFLAGS=$ccdef $asopt
 LIBS=$cclib
 ARCH=$arch
-INSTALLDIR=$installdir
+INSTALLDIR=${DESTDIR}$installdir
 AR=$ar
 INSTALL=install
 OCAMLFIND=ocamlfind