opencv

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set(CMAKE_SYSTEM_NAME Linux)
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set(CMAKE_SYSTEM_PROCESSOR riscv64)
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message(STATUS "RISCV: $ENV{RISCV}")
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message(STATUS "RISCV_GCC_INSTALL_ROOT: $ENV{RISCV_GCC_INSTALL_ROOT}")
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set(RISCV_GCC_INSTALL_ROOT $ENV{RISCV} CACHE PATH "Path to GCC for RISC-V cross compiler installation directory")
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set(CMAKE_C_COMPILER  ${RISCV_GCC_INSTALL_ROOT}/bin/riscv64-linux-gcc)
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set(CMAKE_CXX_COMPILER ${RISCV_GCC_INSTALL_ROOT}/bin/riscv64-linux-g++)
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# fix toolchain macro
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__ANDES=1")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D__ANDES=1")
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# enable rvp
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=rv64gc -mext-dsp")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=rv64gc -mext-dsp")
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# fix segment address
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-Ttext-segment=0x50000")
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set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,-Ttext-segment=0x50000")
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