From 57056bb60643e390c170ae3166d297a971587c93 Mon Sep 17 00:00:00 2001
From: Andrew Kryczka <ajkr@users.noreply.github.com>
Date: Fri, 1 Dec 2017 18:26:15 -0800
Subject: [PATCH] gflags in cmake on linux

Summary:
We should use it if available otherwise the tools builds never work. Thanks to #3212, we can set -DGFLAGS=1 and it'll be independent of the namespace with which gflags was compiled.
Closes https://github.com/facebook/rocksdb/pull/3214

Differential Revision: D6462214

Pulled By: ajkr

fbshipit-source-id: db4e5f1b905322e3119554a9d01b57532c499384
---
 CMakeLists.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 99c4c4fd2..dbe47cf01 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -249,6 +249,13 @@ if(WITH_UBSAN)
   endif()
 endif()
 
+find_package(gflags)
+if(gflags_FOUND)
+  add_definitions(-DGFLAGS=1)
+  include_directories(${gflags_INCLUDE_DIR})
+  list(APPEND THIRDPARTY_LIBS ${gflags_LIBRARIES})
+endif()
+
 find_package(NUMA)
 if(NUMA_FOUND)
   add_definitions(-DNUMA)