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include(CheckFunctionExists)
macro(check_c_fortran_function_exists _func_base _result)
string(TOLOWER "${_func_base}" _func_base_lower)
string(TOUPPER "${_func_base}" _func_base_upper)
set(${_result} FALSE)
foreach(_func ${_func_base_lower}_;${_func_base_lower};${_func_base_lower}__;${_func_base_upper};${_func_base_upper}_)
check_function_exists(${_func} _${_func}_found)
if(_${_func}_found)
set(${_result} ${_func})
break()
else() # try appending c++ libs if depend on c++ runtime
foreach(_cxxlib -lstdc++;-lc++)
cmake_push_check_state()
set(CMAKE_REQUIRED_LIBRARIES "${CMAKE_REQUIRED_LIBRARIES};${_cxxlib}")
check_function_exists(${_func} _${_func}_found_with_${_cxxlib})
cmake_pop_check_state()
if(_${_func}_found_with_${_cxxlib})
set(${_result} ${_func})
break()
endif()
endforeach()
if(${_result})
break()
endif()
endif()
endforeach()
endmacro()
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