From 8fab38662cb6fd70483bd552c44860bd9304dbd1 Mon Sep 17 00:00:00 2001
From: snider <snider@lt.hn>
Date: Mon, 6 Oct 2025 21:45:00 +0100
Subject: [PATCH] Refactor ccache usage in CMake to enable it for all platforms
 and simplify usability checks

---
 CMakeLists.txt         |  2 +-
 cmake/FindCcache.cmake | 26 +++-----------------------
 2 files changed, 4 insertions(+), 24 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index fa197d89..f5f5cf58 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -30,7 +30,7 @@ endif()
 
 include(DocBuilder)
 option (USE_CCACHE "Use ccache if a usable instance is found" ON)
-if (USE_CCACHE AND NOT WIN32)
+if (USE_CCACHE)
   include(FindCcache)
 else()
   message(STATUS "ccache deselected")
diff --git a/cmake/FindCcache.cmake b/cmake/FindCcache.cmake
index 364f943d..4b440f5a 100644
--- a/cmake/FindCcache.cmake
+++ b/cmake/FindCcache.cmake
@@ -1,28 +1,8 @@
 find_program(CCACHE_FOUND ccache)
 if (CCACHE_FOUND)
-    # Try to compile a test program with ccache, in order to verify if it really works. (needed on exotic setups)
-    set(TEST_PROJECT "${CMAKE_BINARY_DIR}/${CMAKE_FILES_DIRECTORY}/CMakeTmp")
-    file(WRITE "${TEST_PROJECT}/CMakeLists.txt" [=[
-cmake_minimum_required(VERSION 3.10)
-project(test)
-option (CCACHE "")
-cmake_policy(SET CMP0091 NEW)
-file(WRITE "${CMAKE_SOURCE_DIR}/test.cpp" "int main() { return 0; }")
-set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE} cache_dir=${CMAKE_SOURCE_DIR}/build/.ccache")
-set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK    "${CCACHE} cache_dir=${CMAKE_SOURCE_DIR}/build/.ccache")
-add_executable(main test.cpp)
-]=])
-    cmake_policy(SET CMP0091 NEW)
-    try_compile(RET "${TEST_PROJECT}/build" "${TEST_PROJECT}" "test" CMAKE_FLAGS -DCCACHE="${CCACHE_FOUND} -DCMAKE_POLICY_DEFAULT_CMP0091=NEW")
-    unset(TEST_PROJECT)
-    if (${RET})
-        # Success
-        message(STATUS "Found usable ccache: ${CCACHE_FOUND}")
-        set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE_FOUND} cache_dir=${CMAKE_SOURCE_DIR}/build/.ccache")
-        set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK    "${CCACHE_FOUND} cache_dir=${CMAKE_SOURCE_DIR}/build/.ccache")
-    else()
-        message(STATUS "Found ccache ${CCACHE_FOUND}, but is UNUSABLE! Return code: ${RET}")
-    endif()
+    message(STATUS "Found usable ccache: ${CCACHE_FOUND}")
+    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE_FOUND} cache_dir=${CMAKE_SOURCE_DIR}/build/.ccache")
+    set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK    "${CCACHE_FOUND} cache_dir=${CMAKE_SOURCE_DIR}/build/.ccache")
 else()
     message(STATUS "ccache NOT found! Please install it for faster rebuilds.")
 endif()
\ No newline at end of file