configure: Identify OpenSSL libraries in Windows.

Signed-off-by: Gurucharan Shetty <[email protected]>
Acked-by: Ben Pfaff <[email protected]>

BUILD.Windows

@@ -54,3 +54,25 @@ or from a distribution tar ball.
 * Run make for the ported executables in the top source directory, e.g.:
 
   % make utilities/ovs-vsctl.exe ovsdb/ovsdb-server.exe
+
+OpenSSL, Open vSwitch and Visual C++
+------------------------------------
+To get SSL support for Open vSwitch on Windows, do the following:
+
+* Install OpenSSL for Windows as suggested at
+http://www.openssl.org/related/binaries.html.
+The link as of this writing suggests to download it from
+http://slproweb.com/products/Win32OpenSSL.html and the latest version is
+"Win32 OpenSSL v1.0.1f".
+
+Note down the directory where OpenSSL is installed (e.g.: C:/OpenSSL-Win32).
+
+* While configuring the package, specify the OpenSSL directory path.
+For example,
+
+  % ./configure CC=./build-aux/cccl LD="`which link`" LIBS="-lws2_32 ..." \
+  --prefix="C:/openvswitch/usr" --localstatedir="C:/openvswitch/var" \
+  --sysconfdir="C:/openvswitch/etc" --enable-ssl \
+  --with-openssl="C:/OpenSSL-Win32"
+
+* Run make for the ported executables.

Makefile.am

@@ -10,11 +10,14 @@ ACLOCAL_AMFLAGS = -I m4
 SUBDIRS = datapath
 
 AM_CPPFLAGS = $(SSL_CFLAGS)
+AM_LDFLAGS = $(SSL_LDFLAGS)
 
 if WIN32
 AM_CPPFLAGS += -I $(top_srcdir)/include/windows
 endif
 
+AM_CPPFLAGS += $(SSL_INCLUDES)
+
 AM_CPPFLAGS += -I $(top_srcdir)/include
 AM_CPPFLAGS += -I $(top_srcdir)/lib
 AM_CPPFLAGS += -I $(top_builddir)/lib

m4/ax_check_openssl.m4

@@ -79,7 +79,11 @@ AC_DEFUN([AX_CHECK_OPENSSL], [
             if test -f "$ssldir/include/openssl/ssl.h"; then
                 SSL_INCLUDES="-I$ssldir/include"
                 SSL_LDFLAGS="-L$ssldir/lib"
-                SSL_LIBS="-lssl -lcrypto"
+                if test "$WIN32" = "yes"; then
+                    SSL_LIBS="-lssleay32 -llibeay32"
+                else
+                    SSL_LIBS="-lssl -lcrypto"
+                fi
                 found=true
                 AC_MSG_RESULT([yes])
                 break
@@ -106,7 +110,8 @@ AC_DEFUN([AX_CHECK_OPENSSL], [
     LIBS="$SSL_LIBS $LIBS"
     CPPFLAGS="$SSL_INCLUDES $CPPFLAGS"
     AC_LINK_IFELSE(
-        [AC_LANG_PROGRAM([#include <openssl/ssl.h>], [SSL_new(NULL)])],
+        [AC_LANG_PROGRAM([#include <openssl/ssl.h>],
+            [SSL_CTX *ctx=NULL;SSL_new(ctx)])],
         [
             AC_MSG_RESULT([yes])
             $1