From 9dc4c432ea1b602a4dd63d884096be0479296730 Mon Sep 17 00:00:00 2001
From: Magnus Jacobsson <magnus.jacobsson@berotec.se>
Date: Mon, 29 Jun 2020 08:06:44 +0200
Subject: [PATCH] Generate build date in UTC also in CMake

This is what autogen.sh does.
---
 CMakeLists.txt | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 855d9361f..622901629 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -155,8 +155,12 @@ else()
 endif()
 
 # Set GRAPHVIZ_VERSION_BUILD to time of last commit, or to 0 if that fails.
+if (DEFINED ENV{TZ})
+  set(TZ_ORIG $ENV{TZ})
+endif()
+set(ENV{TZ} UTC)
 execute_process(
-    COMMAND           "${GIT_EXECUTABLE}" log -n 1 --format=%cd --date=format:%Y%m%d.%H%M
+    COMMAND           "${GIT_EXECUTABLE}" log -n 1 --format=%cd --date=format-local:%Y%m%d.%H%M
     WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
     RESULT_VARIABLE   git_result
     OUTPUT_VARIABLE   GRAPHVIZ_VERSION_BUILD
@@ -164,6 +168,7 @@ execute_process(
     OUTPUT_STRIP_TRAILING_WHITESPACE
     ERROR_STRIP_TRAILING_WHITESPACE
 )
+set(ENV{TZ} ${TZ_ORIG})
 if(NOT git_result EQUAL 0)
     message(WARNING "Failed to set build version: ${git_error}")
     set(GRAPHVIZ_VERSION_BUILD 0)
-- 
2.40.0