libzmq: Fix build by disabling libunwind&update

packages/libzmq/build.sh

@@ -1,7 +1,11 @@
 TERMUX_PKG_HOMEPAGE=http://zeromq.org/
 TERMUX_PKG_DESCRIPTION="Fast messaging system built on sockets. C and C++ bindings. aka 0MQ, ZMQ."
-TERMUX_PKG_VERSION=4.2.1
+TERMUX_PKG_VERSION=4.2.2
 TERMUX_PKG_SRCURL=https://github.com/zeromq/libzmq/releases/download/v${TERMUX_PKG_VERSION}/zeromq-${TERMUX_PKG_VERSION}.tar.gz
-TERMUX_PKG_SHA256=27d1e82a099228ee85a7ddb2260f40830212402c605a4a10b5e5498a7e0e9d03
+TERMUX_PKG_SHA256=5b23f4ca9ef545d5bd3af55d305765e3ee06b986263b31967435d285a3e6df6b
 TERMUX_PKG_DEPENDS="libsodium"
 TERMUX_PKG_EXTRA_CONFIGURE_ARGS="--with-libsodium"
+
+termux_step_post_extract_package() {
+	./autogen.sh
+}

packages/libzmq/configure.ac.patch

@@ -0,0 +1,21 @@
+diff -u -r ../zeromq-4.2.2/configure.ac ./configure.ac
+--- ../zeromq-4.2.2/configure.ac	2017-02-18 19:05:37.000000000 +0100
++++ ./configure.ac	2017-03-23 10:31:34.501893021 +0100
+@@ -653,17 +653,6 @@
+     AC_SUBST(pkg_config_defines, "")
+ fi
+ 
+-PKG_CHECK_MODULES(LIBUNWIND, [libunwind],
+-    [
+-        AC_DEFINE(HAVE_LIBUNWIND, 1, [The libunwind library is to be used])
+-        AC_SUBST([LIBUNWIND_CFLAGS])
+-        AC_SUBST([LIBUNWIND_LIBS])
+-        AC_CHECK_LIB([dl], [dladdr])
+-    ],
+-    [
+-        AC_MSG_WARN([Cannot find libunwind])
+-    ])
+-
+ # Subst LIBZMQ_EXTRA_CFLAGS & CXXFLAGS & LDFLAGS
+ AC_SUBST(LIBZMQ_EXTRA_CFLAGS)
+ AC_SUBST(LIBZMQ_EXTRA_CXXFLAGS)