117 lines
4.2 KiB
CMake
117 lines
4.2 KiB
CMake
# Copyright Epic Games, Inc. All Rights Reserved.
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set(CMAKE_SYSTEM_NAME Linux)
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set(CMAKE_SYSTEM_VERSION 1)
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set(CMAKE_CONFIGURATION_TYPES Debug Release CACHE STRING "" FORCE)
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option(BUILD_WITH_LIBCXX "Include LibCxx" OFF)
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if(NOT DEFINED ENV{LINUX_MULTIARCH_ROOT})
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message(FATAL_ERROR "LINUX_MULTIARCH_ROOT environment variable is not set!")
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endif()
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file(TO_CMAKE_PATH $ENV{LINUX_MULTIARCH_ROOT} LINUX_MULTIARCH_ROOT)
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if(NOT EXISTS ${LINUX_MULTIARCH_ROOT})
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message(FATAL_ERROR "LINUX_MULTIARCH_ROOT environment variable must point to the root directory!")
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endif()
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if(DEFINED CMAKE_C_COMPILER_TARGET)
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set(UE_LINUX_TARGET ${CMAKE_C_COMPILER_TARGET})
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elseif(DEFINED CMAKE_CXX_COMPILER_TARGET)
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set(UE_LINUX_TARGET ${CMAKE_CXX_COMPILER_TARGET})
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else()
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message(FATAL_ERROR "Must define CMAKE_C_COMPILER_TARGET or CMAKE_CXX_COMPILER_TARGET to use this toolchain!")
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endif()
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set(CMAKE_SYSROOT "${LINUX_MULTIARCH_ROOT}/${UE_LINUX_TARGET}")
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if(NOT EXISTS ${CMAKE_SYSROOT})
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message(FATAL_ERROR "Target '${UE_LINUX_TARGET}' does not exist in '${LINUX_MULTIARCH_ROOT}'!")
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endif()
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SET(LIBCXX_PATH "${CMAKE_SYSROOT}")
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string(CONCAT UE_FLAGS
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" -fPIC"
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" -gdwarf-4"
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" --target=${UE_LINUX_TARGET}" # Needed until commit 270e0d9c to CMake in ~3.18.4.
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)
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string(CONCAT UE_FLAGS_C
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)
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string(CONCAT UE_FLAGS_CXX
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" -std=c++14"
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)
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string(CONCAT UE_FLAGS_DEBUG
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" -O0"
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" -D_DEBUG"
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" -DDEBUG"
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)
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string(CONCAT UE_FLAGS_RELEASE
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" -O3"
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" -DNDEBUG"
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)
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if(BUILD_WITH_LIBCXX)
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string(CONCAT UE_FLAGS_CXX
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"${UE_FLAGS_CXX}"
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" -stdlib=libc++"
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" -I${LIBCXX_PATH}/include"
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" -I${LIBCXX_PATH}/include/c++/v1"
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)
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string(CONCAT LIBCXX_FLAGS
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"${LIBCXX_FLAGS}"
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" -stdlib=libc++"
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" -L${LIBCXX_PATH}/lib64"
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" ${LIBCXX_PATH}/lib64/libc++.a"
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" ${LIBCXX_PATH}/lib64/libc++abi.a"
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)
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set(CMAKE_MODULE_LINKER_FLAGS "${LIBCXX_FLAGS}")
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set(CMAKE_EXE_LINKER_FLAGS "${LIBCXX_FLAGS}")
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set(CMAKE_SHARED_LINKER_FLAGS "${LIBCXX_FLAGS} -Wno-unused-command-line-argument -fuse-ld=lld -nodefaultlibs -lm -lc -lgcc_s -lgcc")
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endif()
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if(WIN32)
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set(TOOL_EXT ".exe")
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else()
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set(TOOL_EXT "")
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endif()
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set(CMAKE_C_FLAGS "${UE_FLAGS} ${UE_FLAGS_C}" CACHE STRING "C Flags" FORCE)
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set(CMAKE_CXX_FLAGS "${UE_FLAGS} ${UE_FLAGS_CXX}" CACHE STRING "C++ Flags" FORCE)
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set(CMAKE_C_FLAGS_DEBUG "${UE_FLAGS_DEBUG}" CACHE STRING "C Debug Flags" FORCE)
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set(CMAKE_CXX_FLAGS_DEBUG "${UE_FLAGS_DEBUG}" CACHE STRING "C++ Debug Flags" FORCE)
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set(CMAKE_C_FLAGS_RELEASE "${UE_FLAGS_RELEASE}" CACHE STRING "C Release Flags" FORCE)
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set(CMAKE_CXX_FLAGS_RELEASE "${UE_FLAGS_RELEASE}" CACHE STRING "C++ Release Flags" FORCE)
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set(CMAKE_ASM_COMPILER_TARGET "${UE_LINUX_TARGET}")
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set(CMAKE_C_COMPILER_TARGET "${UE_LINUX_TARGET}")
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set(CMAKE_CXX_COMPILER_TARGET "${UE_LINUX_TARGET}")
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set(CMAKE_C_COMPILER "${CMAKE_SYSROOT}/bin/clang${TOOL_EXT}" CACHE PATH "C Compiler")
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set(CMAKE_CXX_COMPILER "${CMAKE_SYSROOT}/bin/clang++${TOOL_EXT}" CACHE PATH "C++ Compiler")
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set(CMAKE_CXX_COMPILER_RANLIB "${CMAKE_SYSROOT}/bin/${UE_LINUX_TARGET}-ranlib${TOOL_EXT}" CACHE PATH "Cxx Ranlib")
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set(CMAKE_AR "${CMAKE_SYSROOT}/bin/llvm-ar${TOOL_EXT}" CACHE PATH "Archive")
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set(CMAKE_AS "${CMAKE_SYSROOT}/bin/${UE_LINUX_TARGET}-as${TOOL_EXT}" CACHE PATH "Assembler")
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set(CMAKE_LINKER "${CMAKE_SYSROOT}/bin/lld${TOOL_EXT}" CACHE PATH "Linker")
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set(CMAKE_NM "${CMAKE_SYSROOT}/bin/${UE_LINUX_TARGET}-nm${TOOL_EXT}" CACHE PATH "NM")
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set(CMAKE_OBJCOPY "${CMAKE_SYSROOT}/bin/${UE_LINUX_TARGET}-objcopy${TOOL_EXT}" CACHE PATH "ObjCopy")
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set(CMAKE_OBJDUMP "${CMAKE_SYSROOT}/bin/${UE_LINUX_TARGET}-objdump${TOOL_EXT}" CACHE PATH "ObjDump")
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set(CMAKE_RANLIB "${CMAKE_SYSROOT}/bin/${UE_LINUX_TARGET}-ranlib${TOOL_EXT}" CACHE PATH "Ranlib")
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set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
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set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
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set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
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set(CMAKE_SHARED_LIBRARY_PREFIX_C "lib")
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set(CMAKE_SHARED_LIBRARY_PREFIX_CXX "lib")
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set(CMAKE_STATIC_LIBRARY_PREFIX_C "lib")
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set(CMAKE_STATIC_LIBRARY_PREFIX_CXX "lib")
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set(CMAKE_STATIC_LIBRARY_SUFFIX_C ".a")
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set(CMAKE_STATIC_LIBRARY_SUFFIX_CXX ".a")
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