.gitea/workflows/ci.yml

@@ -6,6 +6,13 @@ on:
       - '**'
   workflow_dispatch:
 
+env:
+  CCACHE_DIR: /ccache
+  CCACHE_MAXSIZE: 10G
+  CCACHE_BASEDIR: /root/.conan2
+  CCACHE_NOHASHDIR: "true"
+  CCACHE_COMPILERCHECK: "%compiler% -dumpversion"
+
 jobs:
   conan-packages-tier1:
     runs-on: ubuntu-latest

ConanProfiles/Toolchains/ccache.cmake

@@ -0,0 +1,30 @@
+include_guard()
+
+# Find ccache executable
+find_program(CCACHE_PROGRAM NAMES ccache)
+
+if(CCACHE_PROGRAM)
+    message(STATUS "ccache found: ${CCACHE_PROGRAM}, enabling via CMake launcher and environment.")
+    if (CMAKE_GENERATOR MATCHES "Visual Studio")
+        # Copy original ccache.exe and rename to cl.exe, this way intermediate cmd file is not needed
+        file(COPY_FILE ${CCACHE_PROGRAM} ${CMAKE_BINARY_DIR}/cl.exe ONLY_IF_DIFFERENT)
+
+        # Set Visual Studio global variables:
+        # - Use above cl.exe (ccache.exe) as a compiler 
+        # - Enable parallel compilation
+        list(APPEND CMAKE_VS_GLOBALS
+            "CLToolExe=cl.exe"
+            "CLToolPath=${CMAKE_BINARY_DIR}"
+            "UseMultiToolTask=true"
+            "UseStructuredOutput=false"
+        )
+    elseif(CMAKE_GENERATOR MATCHES "Ninja" OR CMAKE_GENERATOR MATCHES "Unix Makefiles")
+        message(STATUS "Using ccache as compiler launcher for Ninja or Makefiles.")
+        set(CMAKE_CXX_COMPILER_LAUNCHER ${CCACHE_PROGRAM} CACHE FILEPATH "CXX compiler cache used" FORCE)
+        set(CMAKE_C_COMPILER_LAUNCHER ${CCACHE_PROGRAM} CACHE FILEPATH "C compiler cache used" FORCE)
+    else()
+        message(WARNING "Unsupported generator for ccache integration: ${CMAKE_GENERATOR}. ccache will not be used.")
+    endif()
+else()
+    message(WARNING "ccache not found. Not enabling ccache integration.")
+endif()

ConanProfiles/clang

@@ -10,6 +10,8 @@ compiler.runtime=static
 build_type=Release
 
 [conf]
+tools.cmake.cmaketoolchain:user_toolchain+={{profile_dir}}/Toolchains/ccache.cmake
+
 tools.system.package_manager:mode=install
 tools.system.package_manager:sudo=True
 

ConanProfiles/msvc

@@ -9,6 +9,8 @@ compiler.runtime=static
 build_type=Release
 
 [conf]
+tools.cmake.cmaketoolchain:user_toolchain+={{profile_dir}}/Toolchains/ccache.cmake
+
 tools.build:cflags=["/Zc:preprocessor", "/Zc:__STDC__", "/D_CRT_DECLARE_NONSTDC_NAMES=1"]
 tools.build:cxxflags=["/Zc:preprocessor", "/permissive-", "/Zc:__cplusplus", "/Zc:enumTypes", "/Zc:templateScope"]