From 2b516c5077f27abd9c2605be521de8914055dea1 Mon Sep 17 00:00:00 2001
From: Tim Angus <tim@ngus.net>
Date: Sat, 30 Aug 2025 11:31:31 +0100
Subject: [PATCH] Add SOURCE_DATE_EPOCH support

---
 CMakeLists.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 71f19794..a1056df7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -62,6 +62,11 @@ add_compile_definitions(PRODUCT_VERSION="${PRODUCT_VERSION}")
 # For CI to read from
 file(GENERATE OUTPUT ${CMAKE_BINARY_DIR}/version.txt CONTENT ${PRODUCT_VERSION})
 
+if(DEFINED ENV{SOURCE_DATE_EPOCH})
+    string(TIMESTAMP PRODUCT_DATE "%b %d %Y" UTC)
+    add_compile_definitions(PRODUCT_DATE="${PRODUCT_DATE}")
+endif()
+
 set(SOURCE_DIR ${CMAKE_SOURCE_DIR}/code)
 
 include(compilers/all)