gnutls: Allow enabling smart card support as option.

Signed-off-by: Nikos Mavrogiannopoulos <nmav@gnutls.org>

libs/gnutls/Config.in

@@ -31,6 +31,11 @@ config GNUTLS_PSK
 config GNUTLS_ANON
 	bool "enable anonymous authentication support"
 
+config GNUTLS_PKCS11
+	bool "enable smart card (PKCS11) support"
+	select GNUTLS_EXT_LIBTASN1
+	default n
+
 config GNUTLS_EXT_LIBTASN1
 	bool "use external libtasn1"
 	default n

libs/gnutls/Makefile

@@ -75,7 +75,7 @@ endef
 define Package/libgnutls
 $(call Package/gnutls/Default)
   TITLE+= (library)
-  DEPENDS+= +libnettle +!LIBNETTLE_MINI:libgmp +GNUTLS_EXT_LIBTASN1:libtasn1
+  DEPENDS+= +libnettle +!LIBNETTLE_MINI:libgmp +GNUTLS_EXT_LIBTASN1:libtasn1 +GNUTLS_PKCS11:p11-kit
 endef
 
 define Package/libgnutls/description
@@ -106,13 +106,16 @@ CONFIGURE_ARGS+= \
 	--disable-doc \
 	--disable-tests \
 	--disable-rsa-export \
-	--disable-crywrap \
-	--without-p11-kit
+	--disable-crywrap
 
 ifneq ($(CONFIG_GNUTLS_EXT_LIBTASN1),y)
 CONFIGURE_ARGS += --with-included-libtasn1
 endif
 
+ifneq ($(CONFIG_GNUTLS_PKCS11),y)
+CONFIGURE_ARGS += --without-p11-kit
+endif
+
 ifeq ($(CONFIG_LIBNETTLE_MINI),y)
 CONFIGURE_ARGS += --with-nettle-mini
 endif
@@ -209,6 +212,11 @@ ifeq ($(CONFIG_GNUTLS_PSK),y)
 		$(PKG_INSTALL_DIR)/usr/bin/psktool \
 		$(1)/usr/bin/
 endif
+ifeq ($(CONFIG_GNUTLS_PKCS11),y)
+	$(CP) \
+		$(PKG_INSTALL_DIR)/usr/bin/p11tool \
+		$(1)/usr/bin/
+endif
 endef