135 lines
5.0 KiB
CMake
135 lines
5.0 KiB
CMake
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# .rst:
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# UseCompilerCache
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# --------
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#
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# This module provides a function to setup a compiler cache tool (default: ``ccache``)
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# Main function of interest is ``UseCompilerCache``
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#
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# Needs CMake 3.4 at least
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# Inspired from:
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# * https://crascit.com/2016/04/09/using-ccache-with-cmake/
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# * https://stackoverflow.com/a/36515503/
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# * https://gitlab.kitware.com/henryiii/cmake/blob/cache/Modules/UseCompilerCache.cmake
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# .rst
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# pcl_ccache_compat_file_gen
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# -- Generates a wrapper file which launches the compiler commands using ccache.
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# This allows support for XCode and CCache < 3.3
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function(pcl_ccache_compat_file_gen FILE_NAME CCACHE_PROGRAM COMPILER)
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message(STATUS "${FILE_NAME} for ${CCACHE_PROGRAM} with ${COMPILER}")
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file(WRITE "${CMAKE_BINARY_DIR}/${FILE_NAME}" ""
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"#! /usr/bin/env sh\n"
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"\n"
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"# Xcode generator doesn't include the compiler as the\n"
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"# first argument, Ninja and Makefiles do. Handle both cases.\n"
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"if [ \"$1\" = \"${COMPILER}\" ] ; then\n"
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" shift\n"
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"fi\n"
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"\n"
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"export CCACHE_CPP2=true\n"
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"exec \"${CCACHE_PROGRAM}\" \"${COMPILER}\" \"$@\"\n")
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endfunction()
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# .rst
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# UseCompilerCache([PROGRAM <ccache_name>] [QUIET] [REQUIRED])
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# -- Add the compiler cache tool (default to look for ccache on the path)
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# to your build through CMAKE_<LANG>_COMPILER_LAUNCHER variables. Also
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# supports XCode. Uses a wrapper for XCode and CCache < 3.3.
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# Sets the COMPILER_CACHE_VERSION variable.
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function(UseCompilerCache)
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set(options QUIET REQUIRED)
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set(oneValueArgs CCACHE)
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set(multiValueArgs)
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cmake_parse_arguments(ARGS "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
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if(NOT ARGS_CCACHE)
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set(ARGS_CCACHE ccache)
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endif()
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find_program(CCACHE_PROGRAM ${ARGS_CCACHE})
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# Quit if not found
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if(NOT CCACHE_PROGRAM)
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if(REQUIRED)
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message(FATAL_ERROR "Failed to find ${CCACHE_PROGRAM} (REQUIRED)")
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endif()
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return()
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endif()
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if(CMAKE_GENERATOR MATCHES "Visual")
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message(FATAL_ERROR "MSVC isn't compatible with current solutions. Please rename compiler cache to cl.exe and prepend its location in env PATH variable")
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return()
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endif()
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# Get version number
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execute_process(COMMAND "${CCACHE_PROGRAM}" --version OUTPUT_VARIABLE output)
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string(REPLACE "\n" ";" output "${output}")
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foreach(line ${output})
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string(TOLOWER ${line} line)
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string(REGEX REPLACE "^ccache version ([\\.0-9]+)$" "\\1" version "${line}")
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if(version)
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set(COMPILER_CACHE_VERSION ${version} PARENT_SCOPE)
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break()
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endif()
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endforeach()
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if(NOT QUIET)
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message(STATUS "Using Compiler Cache (${CCACHE_PROGRAM}) v${version} in the C/C++ toolchain")
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endif()
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set(xcode_compat FALSE)
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if(CMAKE_GENERATOR STREQUAL Xcode)
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set(xcode_compat TRUE)
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endif()
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set(ccache_compat FALSE)
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if((ARGS_CCACHE STREQUAL ccache) AND (version VERSION_LESS 3.3.0))
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set(ccache_compat TRUE)
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endif()
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# Indirect wrapper is needed for CCache < 3.3 or XCode
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if(NOT (${xcode_compat} OR ${ccache_compat}))
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# Support Unix Makefiles and Ninja
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message(STATUS "Compiler cache via cmake launcher prefix")
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set(CMAKE_C_COMPILER_LAUNCHER "${CCACHE_PROGRAM}" PARENT_SCOPE)
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set(CMAKE_CXX_COMPILER_LAUNCHER "${CCACHE_PROGRAM}" PARENT_SCOPE)
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set(CMAKE_CUDA_COMPILER_LAUNCHER "${CCACHE_PROGRAM}" PARENT_SCOPE)
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return()
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endif()
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message(STATUS "Generating launch helpers for compiler cache")
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pcl_ccache_compat_file_gen("launch-c" ${CCACHE_PROGRAM} ${CMAKE_C_COMPILER})
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pcl_ccache_compat_file_gen("launch-cxx" ${CCACHE_PROGRAM} ${CMAKE_CXX_COMPILER})
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execute_process(COMMAND chmod a+rx
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"${CMAKE_BINARY_DIR}/launch-c"
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"${CMAKE_BINARY_DIR}/launch-cxx")
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# Cuda support only added in CMake 3.10
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set(cuda_supported FALSE)
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if (NOT (CMAKE_VERSION VERSION_LESS 3.10) AND CMAKE_CUDA_COMPILER)
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set(cuda_supported TRUE)
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endif()
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if(${cuda_supported})
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pcl_ccache_compat_file_gen("launch-cuda" ${CCACHE_PROGRAM} ${CMAKE_CUDA_COMPILER})
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execute_process(COMMAND chmod a+rx
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"${CMAKE_BINARY_DIR}/launch-cuda")
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endif()
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if(${xcode_compat})
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# Set Xcode project attributes to route compilation and linking properly
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message(STATUS "Compiler cache via launch files to support XCode")
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set(CMAKE_XCODE_ATTRIBUTE_CC "${CMAKE_BINARY_DIR}/launch-c" PARENT_SCOPE)
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set(CMAKE_XCODE_ATTRIBUTE_CXX "${CMAKE_BINARY_DIR}/launch-cxx" PARENT_SCOPE)
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set(CMAKE_XCODE_ATTRIBUTE_LD "${CMAKE_BINARY_DIR}/launch-c" PARENT_SCOPE)
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set(CMAKE_XCODE_ATTRIBUTE_LDPLUSPLUS "${CMAKE_BINARY_DIR}/launch-cxx" PARENT_SCOPE)
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else()
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message(STATUS "Compiler cache via launch files to support Unix Makefiles and Ninja")
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set(CMAKE_C_COMPILER_LAUNCHER "${CMAKE_BINARY_DIR}/launch-c" PARENT_SCOPE)
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set(CMAKE_CXX_COMPILER_LAUNCHER "${CMAKE_BINARY_DIR}/launch-cxx" PARENT_SCOPE)
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if (${cuda_supported})
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set(CMAKE_CUDA_COMPILER_LAUNCHER "${CMAKE_BINARY_DIR}/launch-cuda" PARENT_SCOPE)
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endif()
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endif()
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endfunction()
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