From 6a6aebb84541d02315925b565aa7343c57825799 Mon Sep 17 00:00:00 2001
From: Pawel Kurdybacha <pawel.kurdybacha@gmail.com>
Date: Tue, 22 Jan 2019 20:55:06 +0000
Subject: [PATCH] Problem #284: test pthread link error with with gcc

Solution: Use Threads cmake module as suggested in this thread:
https://cmake.org/pipermail/cmake/2016-February/062729.html

I was able to reproduce with gcc 8.2.1 and cmake 3.13.2.
---
 tests/CMakeLists.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index c2a13f0..cc187fb 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -10,6 +10,7 @@ set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR})
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_BINDIR})
 
 include(cmake/catch.cmake)
+find_package(Threads)
 
 add_executable(
     unit_tests
@@ -28,6 +29,7 @@ target_include_directories(unit_tests PUBLIC ${CATCH_INCLUDE_DIR})
 target_link_libraries(
     unit_tests
     PRIVATE cppzmq
+    PRIVATE ${CMAKE_THREAD_LIBS_INIT}
 )
 
 OPTION (COVERAGE "Enable gcda file generation needed by lcov" OFF)