From ce3972f0b4d832224d4512f8fe02e9b7763b2a5e Mon Sep 17 00:00:00 2001
From: Marcus Holland-Moritz <github@mhxnet.de>
Date: Tue, 12 Dec 2023 17:02:33 +0100
Subject: [PATCH] build: use mold for linking when available

---
 CMakeLists.txt | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 02d62159..18ae5a70 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -48,6 +48,7 @@ else()
   option(PREFER_SYSTEM_XXHASH "use system xxHash if available" OFF)
   option(PREFER_SYSTEM_GTEST "use system gtest if available" OFF)
   option(DISABLE_CCACHE "disable ccache" OFF)
+  option(DISABLE_MOLD "disable mold" OFF)
   option(STATIC_BUILD_DO_NOT_USE "try static build (experimental)" OFF)
 endif()
 
@@ -71,6 +72,15 @@ if(DEFINED ENV{CCACHE_PREFIX})
   add_compile_options(-Wno-gnu-line-marker)
 endif()
 
+if(NOT WIN32)
+  if(NOT DISABLE_MOLD)
+    find_program(MOLD_EXE mold)
+    if(MOLD_EXE)
+      set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fuse-ld=${MOLD_EXE}")
+    endif()
+  endif()
+endif()
+
 set(default_build_type "Release")
 
 set(CMAKE_CXX_STANDARD 20)