70 lines
3.3 KiB
CMake
70 lines
3.3 KiB
CMake
# This function provides a set of specific flags for each supported board
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# depending on the processor type. The objective is to optimize for size.
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# Thus, all of the following flags are chosen carefully to reduce binary
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# footprints.
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# Set generic minimization flags for all platforms.
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# These flags are the same for all cross-compilation cases.
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Os -fdata-sections -ffunction-sections")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fomit-frame-pointer -fno-unwind-tables")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-asynchronous-unwind-tables -fvisibility=hidden")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fshort-enums -finline-small-functions")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -findirect-inlining -fno-common")
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#-flto -fuse-ld=gold # There is an issue with gold link when compiling on
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# Ubuntu 16. At that point gcc linker did not integrate the flto support
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# inside and it was a separate plugin that need to be added. Therefore,
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# this can be added when mlpack Azure CI moves toward Ubuntu 20.
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set(BOARD_NAME "" CACHE STRING "Specify Board name to optimize for.")
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string(TOUPPER ${BOARD_NAME} BOARD)
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# Set specific platforms CMAKE CXX flags.
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if(BOARD MATCHES "RPI0" OR BOARD MATCHES "RPI1")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mtune=arm1176jzf-s")
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gc-sections")
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set(OPENBLAS_TARGET "ARMV6")
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set(OPENBLAS_BINARY "32")
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elseif(BOARD MATCHES "RPI2")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mtune=cortex-a7")
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gc-sections")
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set(OPENBLAS_TARGET "ARMV7")
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set(OPENBLAS_BINARY "32")
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elseif(BOARD MATCHES "RPI3")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mtune=cortex-a53")
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gc-sections")
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set(OPENBLAS_TARGET "CORTEXA53")
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set(OPENBLAS_BINARY "64")
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elseif(BOARD MATCHES "RPI4")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mtune=cortex-a72")
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gc-sections")
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set(OPENBLAS_TARGET "CORTEXA72")
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set(OPENBLAS_BINARY "64")
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elseif(BOARD MATCHES "BV")
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gc-sections")
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set(OPENBLAS_TARGET "RISCV64_GENERIC")
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set(OPENBLAS_BINARY "64")
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elseif(BOARD MATCHES "JETSONAGX")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -matune=cortex-a76")
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gc-sections")
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set(OPENBLAS_TARGET "ARM8")
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set(OPENBLAS_BINARY "64")
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elseif(BOARD MATCHES "KATAMI")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=pentium3")
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gc-sections")
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set(OPENBLAS_TARGET "KATAMI")
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set(OPENBLAS_BINARY "32")
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elseif(BOARD MATCHES "COPPERMINE")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=pentium3")
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gc-sections")
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set(OPENBLAS_TARGET "COPPERMINE")
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set(OPENBLAS_BINARY "32")
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elseif(BOARD MATCHES "NORTHWOOD")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=pentium4")
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gc-sections")
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set(OPENBLAS_TARGET "NORTHWOOD")
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set(OPENBLAS_BINARY "32")
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elseif(BOARD)
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## TODO: update documentation with a list of the supported boards.
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message(FATAL_ERROR "Given BOARD_NAME is not known; please choose a supported board from the list")
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endif()
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