From 227197cc5b1b7bed4fd635a893edde52ee3e9a98 Mon Sep 17 00:00:00 2001
From: "Bernhard M. Wiedemann" <bwiedemann@suse.de>
Date: Sun, 19 Nov 2023 11:53:55 +0100
Subject: [PATCH] Omit BUILD_HOST_NAME for reproducible builds

Distributions that want reproducible builds, set the SOURCE_DATE_EPOCH
environment variable. In this case, we should not record the build
host name to allow for bit-identical rebuilds elsewhere.

This patch was done while working on reproducible builds for openSUSE.
---
 CMakeLists.txt | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3c9341be..06598efd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -47,7 +47,11 @@ execute_process(
 )
 message("GIT_BRANCH: ${GIT_BRANCH}")
 
-cmake_host_system_information(RESULT BUILD_HOST_NAME QUERY HOSTNAME)
+if($ENV{SOURCE_DATE_EPOCH})
+    set(BUILD_HOST_NAME "reproduciblebuild")
+else ()
+    cmake_host_system_information(RESULT BUILD_HOST_NAME QUERY HOSTNAME)
+endif()
 if(${CMAKE_VERSION} VERSION_GREATER "3.22.0")
     cmake_host_system_information(RESULT BUILD_HOST_DISTRI QUERY DISTRIB_PRETTY_NAME)
 else ()