From 84aa715eb1a0f99c8c2a6aa74485a6bb551666ef Mon Sep 17 00:00:00 2001
From: Fijxu <fijxu@nadeko.net>
Date: Wed, 13 Mar 2024 08:16:00 +0000
Subject: [PATCH] feature: Use CCACHE if possible

---
 CMakeLists.txt | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9aeea1c13b..5a3f5f97d7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -70,6 +70,8 @@ CMAKE_DEPENDENT_OPTION(SUYU_USE_FASTER_LD "Check if a faster linker is available
 
 CMAKE_DEPENDENT_OPTION(USE_SYSTEM_MOLTENVK "Use the system MoltenVK lib (instead of the bundled one)" OFF "APPLE" OFF)
 
+option(USE_CCACHE "Use CCache for faster building" ON)
+
 set(DEFAULT_ENABLE_OPENSSL ON)
 if (ANDROID OR WIN32 OR APPLE)
     # - Windows defaults to the Schannel backend.
@@ -733,3 +735,17 @@ if(ENABLE_QT AND UNIX AND NOT APPLE)
     install(FILES "dist/org.suyu_emu.suyu.metainfo.xml"
             DESTINATION "share/metainfo")
 endif()
+
+# Enable CCACHE. Linux only for now.
+if (USE_CCACHE)
+  find_program(CCACHE_PROGRAM ccache)
+  if(CCACHE_PROGRAM)
+    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE_PROGRAM}")
+    if (SUYU_USE_PRECOMPILED_HEADERS)
+      message(NOTICE "To make use of CCache, set SUYU_USE_PRECOMPILED_HEADERS to OFF or else, it will barely be functional")
+    endif()
+    message(STATUS "CCache found.")
+  else()
+    message(STATUS "CCache has not been found and it will not be used. Install CCache or set USE_CCACHE to OFF")
+  endif()
+endif()