From 2e87390656dbc66309501dbaf6fcd7521234ef37 Mon Sep 17 00:00:00 2001
From: serg06 <serkhas@hotmail.com>
Date: Sun, 24 May 2020 18:08:57 -0400
Subject: [PATCH] Initialize some CMake variables as empty before build

This prevents a bug that occurs when a parent has a `sources` variable when doing `add_subdirectory("libzmq")`.
---
 CMakeLists.txt | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0fee2532..56059582 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -31,6 +31,12 @@ include(ZMQSupportMacros)
 
 find_package(PkgConfig)
 
+# Set lists to empty beforehand as to not accidentally take values from parent
+set(sources)
+set(cxx-sources)
+set(html-docs)
+set(target_outputs)
+
 option(ENABLE_ASAN "Build with address sanitizer" OFF)
 if(ENABLE_ASAN)
   message(STATUS "Instrumenting with Address Sanitizer")