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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
# This module is shared by multiple languages; use include blocker.
if(__COMPILER_CLANG)
return()
endif()
set(__COMPILER_CLANG 1)
include(Compiler/CMakeCommonCompilerMacros)
if("x${CMAKE_C_SIMULATE_ID}" STREQUAL "xMSVC"
OR "x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC"
OR "x${CMAKE_Fortran_SIMULATE_ID}" STREQUAL "xMSVC")
macro(__compiler_clang lang)
endmacro()
else()
include(Compiler/GNU)
macro(__compiler_clang lang)
__compiler_gnu(${lang})
set(CMAKE_${lang}_COMPILE_OPTIONS_PIE "-fPIE")
# Link options for PIE are already set in 'Compiler/GNU.cmake'
# but clang may require alternate syntax on some platforms
if (APPLE)
set(CMAKE_${lang}_LINK_OPTIONS_PIE ${CMAKE_${lang}_COMPILE_OPTIONS_PIE} -Xlinker -pie)
set(CMAKE_${lang}_LINK_OPTIONS_NO_PIE -Xlinker -no_pie)
endif()
set(CMAKE_INCLUDE_SYSTEM_FLAG_${lang} "-isystem ")
set(CMAKE_${lang}_COMPILE_OPTIONS_VISIBILITY "-fvisibility=")
if(CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 3.4.0)
set(CMAKE_${lang}_COMPILE_OPTIONS_TARGET "-target ")
set(CMAKE_${lang}_COMPILE_OPTIONS_EXTERNAL_TOOLCHAIN "-gcc-toolchain ")
else()
set(CMAKE_${lang}_COMPILE_OPTIONS_TARGET "--target=")
set(CMAKE_${lang}_COMPILE_OPTIONS_EXTERNAL_TOOLCHAIN "--gcc-toolchain=")
endif()
set(CMAKE_${lang}_LINKER_WRAPPER_FLAG "-Xlinker" " ")
set(CMAKE_${lang}_LINKER_WRAPPER_FLAG_SEP)
if(CMAKE_${lang}_COMPILER_TARGET)
if(CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 3.4.0)
list(APPEND CMAKE_${lang}_COMPILER_PREDEFINES_COMMAND "-target" "${CMAKE_${lang}_COMPILER_TARGET}")
else()
list(APPEND CMAKE_${lang}_COMPILER_PREDEFINES_COMMAND "--target=${CMAKE_${lang}_COMPILER_TARGET}")
endif()
endif()
set(_CMAKE_${lang}_IPO_SUPPORTED_BY_CMAKE YES)
set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES)
string(COMPARE EQUAL "${CMAKE_${lang}_COMPILER_ID}" "AppleClang" __is_apple_clang)
# '-flto=thin' available since Clang 3.9 and Xcode 8
# * http://clang.llvm.org/docs/ThinLTO.html#clang-llvm
# * https://trac.macports.org/wiki/XcodeVersionInfo
set(_CMAKE_LTO_THIN TRUE)
if(__is_apple_clang)
if(CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 8.0)
set(_CMAKE_LTO_THIN FALSE)
endif()
else()
if(CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 3.9)
set(_CMAKE_LTO_THIN FALSE)
endif()
endif()
if(_CMAKE_LTO_THIN)
set(CMAKE_${lang}_COMPILE_OPTIONS_IPO "-flto=thin")
else()
set(CMAKE_${lang}_COMPILE_OPTIONS_IPO "-flto")
endif()
if(ANDROID)
# https://github.com/android-ndk/ndk/issues/242
set(CMAKE_${lang}_LINK_OPTIONS_IPO "-fuse-ld=gold")
endif()
if(ANDROID OR __is_apple_clang)
set(__ar "${CMAKE_AR}")
set(__ranlib "${CMAKE_RANLIB}")
else()
set(__ar "${CMAKE_${lang}_COMPILER_AR}")
set(__ranlib "${CMAKE_${lang}_COMPILER_RANLIB}")
endif()
set(CMAKE_${lang}_ARCHIVE_CREATE_IPO
"\"${__ar}\" cr <TARGET> <LINK_FLAGS> <OBJECTS>"
)
set(CMAKE_${lang}_ARCHIVE_APPEND_IPO
"\"${__ar}\" r <TARGET> <LINK_FLAGS> <OBJECTS>"
)
set(CMAKE_${lang}_ARCHIVE_FINISH_IPO
"\"${__ranlib}\" <TARGET>"
)
set(CMAKE_PCH_EXTENSION .pch)
if (NOT CMAKE_GENERATOR MATCHES "Xcode")
set(CMAKE_PCH_PROLOGUE "#pragma clang system_header")
endif()
set(CMAKE_${lang}_COMPILE_OPTIONS_USE_PCH -Xclang -include-pch -Xclang <PCH_FILE>)
set(CMAKE_${lang}_COMPILE_OPTIONS_CREATE_PCH -Xclang -emit-pch -Xclang -include -Xclang <PCH_HEADER>)
endmacro()
endif()
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