From c6b600d62373744efa9d30493fe131eb4b89e21c Mon Sep 17 00:00:00 2001
From: Yuri D'Elia <wavexx@thregr.org>
Date: Sun, 2 Oct 2022 00:20:02 +0200
Subject: [PATCH] cmake: Strip prefix from debug info

Paves the way for some extra reproducibility.
---
 CMakeLists.txt | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 41d0087..f6a283d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -95,6 +95,12 @@ add_compile_options(-g)
 
 # optimizations
 if(CMAKE_CROSSCOMPILING)
+  # Reproducible build support
+  add_link_options(-fdebug-prefix-map=${CMAKE_SOURCE_DIR}=)
+  add_link_options(-fdebug-prefix-map=${CMAKE_BINARY_DIR}=)
+  if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "8")
+    add_compile_options(-ffile-prefix-map=${CMAKE_SOURCE_DIR}=)
+  endif()
 
   # default optimization flags
   set(CMAKE_CXX_FLAGS_DEBUG "-Og -g")