返回工具链的前缀

CMakeLists.txt

# reference: https://cmake.org/cmake/help/latest/command/string.html
cmake_minimum_required (VERSION 2.8)

# Returns the compiler prefix
function(compiler_prefix input_string output_string)
    string(REGEX MATCH "[^/]+$" compiler_basename ${input_string})
    string(REGEX MATCH "[^-]+$" compiler_id ${compiler_basename})
    if(NOT ${compiler_basename} STREQUAL ${compiler_id})
        string(REPLACE "-${compiler_id}" "" compiler_host ${compiler_basename})
    endif()
    set(${output_string} ${compiler_host} PARENT_SCOPE)
endfunction()

set(COMPILER_STRING "/usr/local/bin/arm-linux-gcc")
message("COMPILER_STRING: " ${COMPILER_STRING})

compiler_prefix(${COMPILER_STRING} COMPILER_PREFIX)
message("COMPILER_PREFIX: " ${COMPILER_PREFIX})