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Kitware
GitHub Repository: Kitware/CMake
 Path: blob/master/Tests/Assembler/CMakeLists.txt
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cmake_minimum_required (VERSION 3.10)

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if(POLICY CMP0129)

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  cmake_policy(SET CMP0129 NEW)

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endif()

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project(Assembler C)

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message("CTEST_FULL_OUTPUT ")

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set(CMAKE_VERBOSE_MAKEFILE 1)

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set(SRCS)

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# (at least) the following toolchains can process assembler files directly

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# and also generate assembler files from C:

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if("${CMAKE_GENERATOR}" MATCHES "Makefile|Xcode|Ninja" AND

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    NOT CMAKE_OSX_ARCHITECTURES MATCHES ";")

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  if((CMAKE_C_COMPILER_ID MATCHES "^(GNU|LCC|Clang|AppleClang|HP|SunPro|XL|OrangeC)$") OR (CMAKE_C_COMPILER_ID MATCHES "Intel"  AND  UNIX)

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     AND NOT (CMAKE_C_COMPILER_ID STREQUAL "Clang" AND "x${CMAKE_C_COMPILER_FRONTEND_VARIANT}" STREQUAL "xMSVC"))

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    set(C_FLAGS "${CMAKE_C_FLAGS}")

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    separate_arguments(C_FLAGS)

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    if(CMAKE_OSX_SYSROOT AND CMAKE_C_SYSROOT_FLAG AND NOT ";${C_FLAGS};" MATCHES ";${CMAKE_C_SYSROOT_FLAG};")

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      list(APPEND C_FLAGS ${CMAKE_C_SYSROOT_FLAG} ${CMAKE_OSX_SYSROOT})

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    endif()

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    if(CMAKE_OSX_ARCHITECTURES)

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      list(APPEND C_FLAGS -arch ${CMAKE_OSX_ARCHITECTURES})

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    elseif("${CMAKE_SYSTEM_NAME};${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "Darwin;arm64")

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      list(APPEND C_FLAGS -arch arm64)

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    endif()

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    if(CMAKE_C_COMPILER_ID MATCHES "Clang")

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      # Just in case the user is passing -flto, we need to pass -fno-lto to

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      # clang when generating the assembly file, or else clang will generate

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      # LLVM IR instead of assembly.

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      list(APPEND C_FLAGS -fno-lto)

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    endif()

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    # Clang on OS X, and perhaps other compilers, do not support -g

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    # for both generating and assembling, so drop it from generating.

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    list(REMOVE_ITEM C_FLAGS -g)

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    set(SRCS main.s)

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    add_custom_command(

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      OUTPUT main.s

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      COMMAND ${CMAKE_C_COMPILER} ${C_FLAGS}

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        "$<$<CONFIG:Debug>:${CMAKE_C_COMPILE_OPTIONS_MSVC_RUNTIME_LIBRARY_MultiThreadedDebugDLL}>"

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        "$<$<NOT:$<CONFIG:Debug>>:${CMAKE_C_COMPILE_OPTIONS_MSVC_RUNTIME_LIBRARY_MultiThreadedDLL}>"

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        -S ${CMAKE_CURRENT_SOURCE_DIR}/main.c -o main.s

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      COMMAND_EXPAND_LISTS

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      DEPENDS main.c

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      VERBATIM

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      )

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  endif()

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endif()

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if(SRCS)

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  set(CMAKE_ASM_FLAGS "${CMAKE_C_FLAGS}")

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  enable_language(ASM OPTIONAL)

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else()

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  message(STATUS "No assembler enabled, using C")

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  set(SRCS main.c)

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endif()

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add_executable(HelloAsm ${SRCS})

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