From ace549587073d387823815b02ec85a28da408844 Mon Sep 17 00:00:00 2001
From: Alexandru Croitor <alexandru.croitor@qt.io>
Date: Wed, 5 Jun 2019 14:28:31 +0200
Subject: [PATCH] Fix a few of the Wrap modules to protect against double
 creation of

targets. This created issues when trying to build standalone examples.

Change-Id: Iaaea2b537793ae25fbf3143cc205574446aa4ad1
Reviewed-by: Kevin Funk <kevin.funk@kdab.com>
---
 cmake/FindAtomic.cmake               | 7 +++++++
 cmake/FindWrapDoubleConversion.cmake | 7 +++++++
 cmake/FindWrapRt.cmake               | 7 +++++++
 3 files changed, 21 insertions(+)

diff --git a/cmake/FindAtomic.cmake b/cmake/FindAtomic.cmake
index b4580067ca..91cee62046 100644
--- a/cmake/FindAtomic.cmake
+++ b/cmake/FindAtomic.cmake
@@ -1,3 +1,10 @@
+# We can't create the same interface imported target multiple times, CMake will complain if we do
+# that. This can happen if the find_package call is done in multiple different subdirectories.
+if(TARGET Atomic)
+    set(Atomic_FOUND ON)
+    return()
+endif()
+
 include(CheckCXXSourceCompiles)
 
 set (atomic_test_sources "#include <atomic>
diff --git a/cmake/FindWrapDoubleConversion.cmake b/cmake/FindWrapDoubleConversion.cmake
index 1164f6ba44..9c804a3eec 100644
--- a/cmake/FindWrapDoubleConversion.cmake
+++ b/cmake/FindWrapDoubleConversion.cmake
@@ -1,3 +1,10 @@
+# We can't create the same interface imported target multiple times, CMake will complain if we do
+# that. This can happen if the find_package call is done in multiple different subdirectories.
+if(TARGET WrapDoubleConversion::WrapDoubleConversion)
+    set(WrapDoubleConversion_FOUND ON)
+    return()
+endif()
+
 add_library(WrapDoubleConversion::WrapDoubleConversion INTERFACE IMPORTED)
 
 find_package(double-conversion)
diff --git a/cmake/FindWrapRt.cmake b/cmake/FindWrapRt.cmake
index ef5475c53d..d14b922062 100644
--- a/cmake/FindWrapRt.cmake
+++ b/cmake/FindWrapRt.cmake
@@ -1,3 +1,10 @@
+# We can't create the same interface imported target multiple times, CMake will complain if we do
+# that. This can happen if the find_package call is done in multiple different subdirectories.
+if(TARGET WrapRt)
+    set(WrapRt_FOUND ON)
+    return()
+endif()
+
 include(CheckCXXSourceCompiles)
 include(CMakePushCheckState)