package/zeromq: allow building with draft APIs enabled

Signed-off-by: Lionel Flandrin <lionel@svkt.org>
[Thomas: add explicit --disable-drafts]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/zeromq/Config.in

@@ -52,4 +52,11 @@ config BR2_PACKAGE_ZEROMQ_PGM
 	  3208) implemented either over raw IP packets or UDP
 	  datagrams (encapsulated PGM).
 
+config BR2_PACKAGE_ZEROMQ_DRAFTS
+	bool "Draft APIs support"
+	help
+	  Enable unstable draft ZeroMQ APIs
+
+	  https://pyzmq.readthedocs.io/en/latest/draft.html
+
 endif

package/zeromq/zeromq.mk

@@ -47,6 +47,12 @@ else
 ZEROMQ_CONF_OPTS += --without-pgm
 endif
 
+ifeq ($(BR2_PACKAGE_ZEROMQ_DRAFTS),y)
+ZEROMQ_CONF_OPTS += --enable-drafts
+else
+ZEROMQ_CONF_OPTS += --disable-drafts
+endif
+
 # ZeroMQ uses libsodium if it's available.
 ifeq ($(BR2_PACKAGE_LIBSODIUM),y)
 ZEROMQ_DEPENDENCIES += libsodium