OpenSSL in Android 2.1+ lacks Elliptic Curve and ENGINE support.

Unfortunately, opensslconf.h was not changed accordingly.

Android.mk.in

@@ -42,6 +42,10 @@ strongswan_CFLAGS := \
 	-DHAVE_STRUCT_SADB_X_POLICY_SADB_X_POLICY_PRIORITY \
 	-DHAVE_IPSEC_MODE_BEET \
 	-DHAVE_IPSEC_DIR_FWD \
+	-DOPENSSL_NO_EC \
+	-DOPENSSL_NO_ECDSA \
+	-DOPENSSL_NO_ECDH \
+	-DOPENSSL_NO_ENGINE \
 	-DCAPABILITIES \
 	-DCAPABILITIES_NATIVE \
 	-DMONOLITHIC \