From d6a6024e9eb993d94d24bb0d98f966c50079a525 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Thu, 21 Jul 2016 15:38:47 -0400
Subject: [PATCH] Tests: Hide errors from `ldd --help` output check

If `--help` is not a valid option then it may print content to stderr,
so we need to capture that.
---
 Tests/RunCMake/CMakeLists.txt | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Tests/RunCMake/CMakeLists.txt b/Tests/RunCMake/CMakeLists.txt
index b6d1c3857..dbd553023 100644
--- a/Tests/RunCMake/CMakeLists.txt
+++ b/Tests/RunCMake/CMakeLists.txt
@@ -309,7 +309,8 @@ endif()
 if("${CMAKE_GENERATOR}" MATCHES "Make|Ninja")
   if(UNIX AND NOT CYGWIN)
     execute_process(COMMAND ldd --help
-      OUTPUT_VARIABLE LDD_HELP)
+      OUTPUT_VARIABLE LDD_HELP
+      ERROR_VARIABLE LDD_ERR)
     if("${LDD_HELP}" MATCHES
         "(-r, --function-relocs.*process data and function relocations.*-u, --unused.*print unused direct dependencies)")
       add_RunCMake_test(LinkWhatYouUse)