From 08fd5da6a79f01539cd88bef116ee1729b3785fc Mon Sep 17 00:00:00 2001
From: Markus Blatt <markus@dr-blatt.de>
Date: Wed, 23 Mar 2022 22:46:40 +0100
Subject: [PATCH] Use empty string for buildtime if BUILD_TIMESTAMP is not set.

In combination with the relevant changes in opm-common this
prevent flow in binary Linux packages from having a timestamp in the
executable that changes with every rebuild.

With the changes in opm-common  one can now set the variable
OPM_BINARY_PACKAGE_VERSION to a meaningful version string (Debian
11.2: 2021.10-4). If that is done and flow is built from tarballs it
will now not have a time stamp and print the package version to the
PRT file. E.g.

Flow Version     =  2021.10 (Debian 11.2: 2021.10-1)
---
 opm/simulators/utils/moduleVersion.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/opm/simulators/utils/moduleVersion.cpp b/opm/simulators/utils/moduleVersion.cpp
index 4bbf22c3a..b6420f802 100644
--- a/opm/simulators/utils/moduleVersion.cpp
+++ b/opm/simulators/utils/moduleVersion.cpp
@@ -51,7 +51,11 @@ namespace Opm
     /// the binary was compiled.
     std::string compileTimestamp()
     {
+#ifdef BUILD_TIMESTAMP
         return BUILD_TIMESTAMP;
+#else
+        return "";
+#endif
     }
 
 } // namespace Opm