buildroot/package/cppzmq/0001-fix-install-without-static-libzmq.patch

From bffb0eda34195339f2af49f2879d9d0b9dee5c28 Mon Sep 17 00:00:00 2001
From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Date: Thu, 20 Sep 2018 19:37:26 +0200
Subject: [PATCH] fix install without static libzmq

If libzmq is only available as a shared library and not a static one
then cmake fails with:

-- CMake libzmq package not found, trying again with pkg-config (normal install of zeromq)
-- Found PkgConfig: /home/fabrice/buildroot/output/host/bin/pkg-config (found version "0.28")
CMake Error at CMakeLists.txt:20 (message):
  ZeroMQ was not found, neither as a CMake package nor via pkg-config

This is due to the fact that ZeroMQ_FOUND is not set to ON even if
ZEROMQ_LIBRARY is TRUE:

if(ZeroMQ_LIBRARY AND ZeroMQ_STATIC_LIBRARY)
    set(ZeroMQ_FOUND ON)
endif()

So change AND by OR as suggested in
https://github.com/zeromq/cppzmq/issues/266

Fix #266

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
[Upstream status: https://github.com/zeromq/cppzmq/pull/267]
---
 libzmq-pkg-config/FindZeroMQ.cmake | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libzmq-pkg-config/FindZeroMQ.cmake b/libzmq-pkg-config/FindZeroMQ.cmake
index 89d8236..1b84c95 100644
--- a/libzmq-pkg-config/FindZeroMQ.cmake
+++ b/libzmq-pkg-config/FindZeroMQ.cmake
@@ -8,7 +8,7 @@ find_library(ZeroMQ_LIBRARY NAMES libzmq.so libzmq.dylib libzmq.dll
 find_library(ZeroMQ_STATIC_LIBRARY NAMES libzmq-static.a libzmq.a libzmq.dll.a
              PATHS ${PC_LIBZMQ_LIBDIR} ${PC_LIBZMQ_LIBRARY_DIRS})
 
-if(ZeroMQ_LIBRARY AND ZeroMQ_STATIC_LIBRARY)
+if(ZeroMQ_LIBRARY OR ZeroMQ_STATIC_LIBRARY)
     set(ZeroMQ_FOUND ON)
 endif()
 
-- 
2.17.1