From 82860bd55c832b9cd987aa28b65e08ef7fdfe91d Mon Sep 17 00:00:00 2001
From: "Bernhard M. Wiedemann" <bwiedemann@suse.de>
Date: Tue, 12 Sep 2017 17:12:07 -0700
Subject: [PATCH] Use cmake TIMESTAMP function

Summary:
because it is not only platform independent
but also allows to override the build date
This helps to make ceph builds reproducible (that includes a fork of rockdb in a submodule)

Also adds UTC flag, to be independent of timezone.

Requires cmake-2.8.11+ from 2013
Closes https://github.com/facebook/rocksdb/pull/2848

Differential Revision: D5820189

Pulled By: yiwu-arbug

fbshipit-source-id: e3e8c1550e10e238c173f6c5d9ba15f71ad3ce28
---
 CMakeLists.txt | 14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index b0ccc1e4f..54e6de280 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -32,7 +32,7 @@
 # 3. cmake ..
 # 4. make -j
 
-cmake_minimum_required(VERSION 2.6)
+cmake_minimum_required(VERSION 2.8.11)
 project(rocksdb)
 
 if(POLICY CMP0042)
@@ -98,17 +98,7 @@ else()
   endif()
 endif()
 
-if(WIN32)
-  execute_process(COMMAND powershell -noprofile -Command "Get-Date -format MM_dd_yyyy" OUTPUT_VARIABLE DATE)
-  execute_process(COMMAND powershell -noprofile -Command "Get-Date -format HH:mm:ss" OUTPUT_VARIABLE TIME)
-  string(REGEX REPLACE "(..)_(..)_..(..).*" "\\1/\\2/\\3" DATE "${DATE}")
-  string(REGEX REPLACE "(..):(.....).*" " \\1:\\2" TIME "${TIME}")
-  set(GIT_DATE_TIME "${DATE} ${TIME}")
-else()
-  execute_process(COMMAND date "+%Y/%m/%d %H:%M:%S" OUTPUT_VARIABLE DATETIME)
-  string(REGEX REPLACE "\n" "" DATETIME ${DATETIME})
-  set(GIT_DATE_TIME "${DATETIME}")
-endif()
+string(TIMESTAMP GIT_DATE_TIME "%Y/%m/%d %H:%M:%S" UTC)
 
 find_package(Git)