libzmq: Remove uClibc++ support

libzmq is used by fbzmq, which absolutely requires libstdcpp since it's a
C++14 project. There's no point in using two libc++.

Cleaned up Makefile for consistency between packages.

Added nanosleep patch for platforms that are missing usleep.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
(cherry-picked from ad11587c40)

libs/zmq/Makefile

@@ -1,4 +1,4 @@
-# 
+#
 # Copyright (C) 2016 OpenWrt.org
 #
 # This is free software, licensed under the GNU General Public License v2.
@@ -11,25 +11,22 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=zeromq
 PKG_VERSION:=4.1.7
-PKG_RELEASE:=1
-PKG_MAINTAINER:=Dirk Chang <dirk@kooiot.com>
-PKG_LICENSE:=GPL-3.0+
-PKG_LICENSE_FILES:=LICENCE.txt
-
-PKG_CPE_ID:=cpe:/a:zeromq:libzmq
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://github.com/zeromq/zeromq4-1/releases/download/v$(PKG_VERSION)
 PKG_HASH:=31c383cfcd3be1dc8a66e448c403029e793687e70473b89c4cc0bd626e7da299
-
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(BUILD_VARIANT)/$(PKG_NAME)-$(PKG_VERSION)
 
-PKG_FIXUP:=autoreconf
+PKG_MAINTAINER:=Dirk Chang <dirk@kooiot.com>
+PKG_LICENSE:=GPL-3.0-or-later
+PKG_LICENSE_FILES:=LICENCE.txt
+PKG_CPE_ID:=cpe:/a:zeromq:libzmq
 
 PKG_INSTALL:=1
+PKG_BUILD_PARALLEL:=1
+PKG_REMOVE_FILES:=autogen.sh acinclude.m4 aclocal.m4
 
-
-include $(INCLUDE_DIR)/uclibc++.mk
 include $(INCLUDE_DIR)/package.mk
 
 define Package/libzmq/default
@@ -37,7 +34,7 @@ define Package/libzmq/default
   URL:=http://www.zeromq.org/
   SECTION:=libs
   CATEGORY:=Libraries
-  DEPENDS:=+libuuid +libpthread +librt $(CXX_DEPENDS)
+  DEPENDS:=+libuuid +libpthread +librt +libstdcpp
   PROVIDES:=libzmq
 endef
 
@@ -65,7 +62,10 @@ endef
 # add extra configure flags here
 CONFIGURE_ARGS += \
 	--enable-static \
-	--enable-shared
+	--enable-shared \
+	--with-pic \
+	--with-relaxed \
+	--without-documentation
 
 ifeq ($(BUILD_VARIANT),curve)
   CONFIGURE_ARGS+= --with-libsodium
@@ -73,6 +73,8 @@ else
   CONFIGURE_ARGS+= --without-libsodium
 endif
 
+TARGET_CXXFLAGS += -Wno-error=cpp
+
 define Build/InstallDev
 	$(INSTALL_DIR) $(1)/usr/include
 	$(CP) $(PKG_INSTALL_DIR)/usr/include/zmq.h $(1)/usr/include

libs/zmq/patches/010-disable_pedantic_on_linux_with_ulibc++.patch

@@ -1,14 +0,0 @@
---- a/configure.ac
-+++ b/configure.ac
-@@ -150,8 +150,10 @@ case "${host_os}" in
-     *linux*)
-         # Define on Linux to enable all library features. Define if using a gnu compiler
-         if test "x$GXX" = "xyes"; then
--            CPPFLAGS="-D_GNU_SOURCE $CPPFLAGS"
-+            CPPFLAGS="-D_GNU_SOURCE $CPPFLAGS -Wno-long-long"
-         fi
-+        libzmq_pedantic="no"
-+        libzmq_werror="no"
-         AC_DEFINE(ZMQ_HAVE_LINUX, 1, [Have Linux OS])
-         libzmq_on_linux="yes"
- 

libs/zmq/patches/020-map_with_const_string_with_ublic++.patch

@@ -12,16 +12,6 @@
  
              metadata_t (const dict_t &dict);
              virtual ~metadata_t ();
---- a/src/socket_base.cpp
-+++ b/src/socket_base.cpp
-@@ -30,6 +30,7 @@
- #include <new>
- #include <string>
- #include <algorithm>
-+#include <ctype.h>
- 
- #include "platform.hpp"
- 
 --- a/src/stream_engine.cpp
 +++ b/src/stream_engine.cpp
 @@ -208,7 +208,11 @@ void zmq::stream_engine_t::plug (io_thread_t *io_thread_,
@@ -36,7 +26,7 @@
              zmq_assert (metadata == NULL);
              metadata = new (std::nothrow) metadata_t (properties);
          }
-@@ -815,7 +815,11 @@ void zmq::stream_engine_t::mechanism_ready ()
+@@ -824,7 +828,11 @@ void zmq::stream_engine_t::mechanism_ready ()
  
      //  If we have a peer_address, add it to metadata
      if (!peer_address.empty()) {

libs/zmq/patches/050-nanosleep.patch

@@ -0,0 +1,54 @@
+--- a/src/signaler.cpp
++++ b/src/signaler.cpp
+@@ -86,7 +86,8 @@ static int sleep_ms (unsigned int ms_)
+     usleep (ms_ * 1000);
+     return 0;
+ #else
+-    return usleep (ms_ * 1000);
++    const struct timespec req = {0, (long int)ms_ * 1000 * 1000};
++    return nanosleep (&req, NULL);
+ #endif
+ }
+ 
+--- a/src/tcp_address.cpp
++++ b/src/tcp_address.cpp
+@@ -29,6 +29,7 @@
+ 
+ #include <string>
+ #include <sstream>
++#include <ctime>
+ 
+ #include "tcp_address.hpp"
+ #include "platform.hpp"
+@@ -194,7 +195,8 @@ int zmq::tcp_address_t::resolve_nic_name (const char *nic_, bool ipv6_, bool is_
+         rc = getifaddrs (&ifa);
+         if (rc == 0 || (rc < 0 && errno != ECONNREFUSED))
+             break;
+-        usleep ((backoff_msec << i) * 1000);
++        const struct timespec req = {0, (backoff_msec << i) * 1000 * 1000};
++        nanosleep (&req, NULL);
+     }
+     errno_assert (rc == 0);
+     zmq_assert (ifa != NULL);
+--- a/src/zmq.cpp
++++ b/src/zmq.cpp
+@@ -692,7 +692,8 @@ int zmq_poll (zmq_pollitem_t *items_, int nitems_, long timeout_)
+         usleep (timeout_ * 1000);
+         return 0;
+ #else
+-        return usleep (timeout_ * 1000);
++        const struct timespec req = {0, timeout_ * 1000 * 1000};
++        return nanosleep (&req, NULL);
+ #endif
+     }
+ 
+@@ -852,7 +853,8 @@ int zmq_poll (zmq_pollitem_t *items_, int nitems_, long timeout_)
+         Sleep (timeout_ > 0 ? timeout_ : INFINITE);
+         return 0;
+ #else
+-        return usleep (timeout_ * 1000);
++        const struct timespec req = {0, timeout_ * 1000 * 1000};
++        return nanosleep (&req, NULL);
+ #endif
+     }
+     zmq::clock_t clock;