Depends: Add ZeroMQ package

depends/packages/packages.mk

@@ -1,5 +1,7 @@
 zcash_packages := libsnark libgmp libsodium
 packages := boost openssl $(zcash_packages) googletest googlemock
+packages_darwin:=zeromq
+packages_linux:=zeromq
 native_packages := native_ccache
 
 wallet_packages=bdb

depends/packages/zeromq.mk

@@ -0,0 +1,26 @@
+package=zeromq
+$(package)_version=4.0.4
+$(package)_download_path=http://download.zeromq.org
+$(package)_file_name=$(package)-$($(package)_version).tar.gz
+$(package)_sha256_hash=1ef71d46e94f33e27dd5a1661ed626cd39be4d2d6967792a275040e34457d399
+
+define $(package)_set_vars
+  $(package)_config_opts=--without-documentation --disable-shared
+  $(package)_config_opts_linux=--with-pic
+endef
+
+define $(package)_config_cmds
+  $($(package)_autoconf)
+endef
+
+define $(package)_build_cmds
+  $(MAKE) -C src
+endef
+
+define $(package)_stage_cmds
+  $(MAKE) -C src DESTDIR=$($(package)_staging_dir) install
+endef
+
+define $(package)_postprocess_cmds
+  rm -rf bin share
+endef