diff --git a/llvm/CMakeLists.txt b/llvm/CMakeLists.txt index cfd1a086c0fc2..6913fde73be67 100644 --- a/llvm/CMakeLists.txt +++ b/llvm/CMakeLists.txt @@ -271,30 +271,51 @@ set(LLVM_CCACHE_BUILD OFF CACHE BOOL "Set to ON for a ccache enabled build") if(LLVM_CCACHE_BUILD) find_program(CCACHE_PROGRAM ccache) if(CCACHE_PROGRAM) + # ccache --version example output: "ccache version 4.9.1\n(..)" + execute_process(COMMAND ${CCACHE_PROGRAM} --version OUTPUT_VARIABLE CCACHE_VERSION_STR) + string(REGEX MATCH "[0-9]+\.[0-9]+\.?[0-9]*" CCACHE_VERSION "${CCACHE_VERSION_STR}") + set(LLVM_CCACHE_MAXSIZE "" CACHE STRING "Size of ccache") set(LLVM_CCACHE_DIR "" CACHE STRING "Directory to keep ccached data") - set(LLVM_CCACHE_PARAMS "CCACHE_CPP2=yes CCACHE_HASHDIR=yes" - CACHE STRING "Parameters to pass through to ccache") - if(NOT CMAKE_SYSTEM_NAME MATCHES "Windows") - set(CCACHE_PROGRAM "${LLVM_CCACHE_PARAMS} ${CCACHE_PROGRAM}") + # ccache only supports passing options on the command line from version 4.8.0 + # use a workaround with ad-hoc environment variables for older versions + if (CCACHE_VERSION VERSION_LESS "4.8.0") + set(LLVM_CCACHE_PARAMS "CCACHE_CPP2=yes;CCACHE_HASHDIR=yes" + CACHE STRING "Parameters to pass through to ccache") + + if(NOT CMAKE_SYSTEM_NAME MATCHES "Windows") + set(launcher_params ${LLVM_CCACHE_PARAMS}) + if (LLVM_CCACHE_MAXSIZE) + set(launcher_params CCACHE_MAXSIZE=${LLVM_CCACHE_MAXSIZE} ${launcher_params}) + endif() + if (LLVM_CCACHE_DIR) + set(launcher_params CCACHE_DIR=${LLVM_CCACHE_DIR} ${launcher_params}) + endif() + set(launcher ${launcher_params} "${CCACHE_PROGRAM}") + else() + if(LLVM_CCACHE_MAXSIZE OR LLVM_CCACHE_DIR OR + NOT LLVM_CCACHE_PARAMS MATCHES "CCACHE_CPP2=yes;CCACHE_HASHDIR=yes") + message(FATAL_ERROR "Ccache configuration through CMake is not supported on Windows. Please use environment variables.") + endif() + set(launcher "${CCACHE_PROGRAM}") + endif() + else() + set(LLVM_CCACHE_PARAMS "run_second_cpp=true;hash_dir=true" + CACHE STRING "Parameters to pass through to ccache") + + set(launcher_params ${LLVM_CCACHE_PARAMS}) if (LLVM_CCACHE_MAXSIZE) - set(CCACHE_PROGRAM "CCACHE_MAXSIZE=${LLVM_CCACHE_MAXSIZE} ${CCACHE_PROGRAM}") + set(launcher_params max_size=${LLVM_CCACHE_MAXSIZE} ${launcher_params}) endif() if (LLVM_CCACHE_DIR) - set(CCACHE_PROGRAM "CCACHE_DIR=${LLVM_CCACHE_DIR} ${CCACHE_PROGRAM}") + set(launcher_params cache_dir=${LLVM_CCACHE_DIR} ${launcher_params}) endif() - set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ${CCACHE_PROGRAM}) - else() - if(LLVM_CCACHE_MAXSIZE OR LLVM_CCACHE_DIR OR - NOT LLVM_CCACHE_PARAMS MATCHES "CCACHE_CPP2=yes CCACHE_HASHDIR=yes") - message(FATAL_ERROR "Ccache configuration through CMake is not supported on Windows. Please use environment variables.") - endif() - # RULE_LAUNCH_COMPILE should work with Ninja but currently has issues - # with cmd.exe and some MSVC tools other than cl.exe - set(CMAKE_C_COMPILER_LAUNCHER ${CCACHE_PROGRAM}) - set(CMAKE_CXX_COMPILER_LAUNCHER ${CCACHE_PROGRAM}) + set(launcher "${CCACHE_PROGRAM}" ${launcher_params}) endif() + + set(CMAKE_C_COMPILER_LAUNCHER ${launcher}) + set(CMAKE_CXX_COMPILER_LAUNCHER ${launcher}) else() message(FATAL_ERROR "Unable to find the program ccache. Set LLVM_CCACHE_BUILD to OFF") endif()