From 945dd207b6ca6ca38e3b87247836eb1b3d5f8a77 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Tue, 13 Dec 2016 13:04:18 -0500
Subject: CUDA: Allow platform files to set device linking rules

Condition the default settings on the rule variables not already being
set.
---
 Modules/CMakeCUDAInformation.cmake | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/Modules/CMakeCUDAInformation.cmake b/Modules/CMakeCUDAInformation.cmake
index 202a7a6..cb0eef5 100644
--- a/Modules/CMakeCUDAInformation.cmake
+++ b/Modules/CMakeCUDAInformation.cmake
@@ -177,11 +177,14 @@ if(NOT CMAKE_CUDA_LINK_EXECUTABLE)
 endif()
 
 #These are used when linking relocatable (dc) cuda code
-set(CMAKE_CUDA_DEVICE_LINK_LIBRARY
-      "<CMAKE_CUDA_COMPILER> <CMAKE_CUDA_LINK_FLAGS> <LANGUAGE_COMPILE_FLAGS> ${CMAKE_CUDA_COMPILE_OPTIONS_PIC} -shared -dlink <OBJECTS> -o <TARGET> <LINK_LIBRARIES>")
-set(CMAKE_CUDA_DEVICE_LINK_EXECUTABLE
-      "<CMAKE_CUDA_COMPILER> <CMAKE_CUDA_LINK_FLAGS> ${CMAKE_CUDA_COMPILE_OPTIONS_PIC} -shared -dlink <OBJECTS> -o <TARGET> <LINK_LIBRARIES>")
-
+if(NOT CMAKE_CUDA_DEVICE_LINK_LIBRARY)
+  set(CMAKE_CUDA_DEVICE_LINK_LIBRARY
+    "<CMAKE_CUDA_COMPILER> <CMAKE_CUDA_LINK_FLAGS> <LANGUAGE_COMPILE_FLAGS> ${CMAKE_CUDA_COMPILE_OPTIONS_PIC} -shared -dlink <OBJECTS> -o <TARGET> <LINK_LIBRARIES>")
+endif()
+if(NOT CMAKE_CUDA_DEVICE_LINK_EXECUTABLE)
+  set(CMAKE_CUDA_DEVICE_LINK_EXECUTABLE
+    "<CMAKE_CUDA_COMPILER> <CMAKE_CUDA_LINK_FLAGS> ${CMAKE_CUDA_COMPILE_OPTIONS_PIC} -shared -dlink <OBJECTS> -o <TARGET> <LINK_LIBRARIES>")
+endif()
 
 mark_as_advanced(
 CMAKE_CUDA_FLAGS
-- 
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