From 3629a8033ddac0b63c05ee19283baea0cf323a2d Mon Sep 17 00:00:00 2001
From: Pavel Kirienko <pavel.kirienko@gmail.com>
Date: Thu, 2 Jun 2016 23:36:42 +0300
Subject: [PATCH] Building tests only if GTest is found

---
 libuavcan/CMakeLists.txt | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/libuavcan/CMakeLists.txt b/libuavcan/CMakeLists.txt
index d27c89d68c..7d23d707b0 100644
--- a/libuavcan/CMakeLists.txt
+++ b/libuavcan/CMakeLists.txt
@@ -139,10 +139,15 @@ if (DEBUG_BUILD)
     add_dependencies(uavcan_optim libuavcan_dsdlc)
 
     # GTest executables
-    find_package(GTest REQUIRED)
-    add_libuavcan_test(libuavcan_test       uavcan       "")                 # Default
-    add_libuavcan_test(libuavcan_test_cpp03 uavcan_cpp03 "${cpp03_flags}")   # C++03
-    add_libuavcan_test(libuavcan_test_optim uavcan_optim "${optim_flags}")   # Max optimization
+    find_package(GTest)
+    if (GTEST_FOUND)
+        message(STATUS "GTest found, tests will be built and run [${GTEST_INCLUDE_DIRS}] [${GTEST_BOTH_LIBRARIES}]")
+        add_libuavcan_test(libuavcan_test       uavcan       "")                 # Default
+        add_libuavcan_test(libuavcan_test_cpp03 uavcan_cpp03 "${cpp03_flags}")   # C++03
+        add_libuavcan_test(libuavcan_test_optim uavcan_optim "${optim_flags}")   # Max optimization
+    else (GTEST_FOUND)
+        message(STATUS "GTest was not found, tests will not be built")
+    endif (GTEST_FOUND)
 else ()
     message(STATUS "Release build type: " ${CMAKE_BUILD_TYPE})
 endif ()