set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS true)
include(CheckFunctionExists)
if (ICONV_INCLUDE_DIR)
    # Already in cache, be silent
    set(ICONV_FIND_QUIETLY TRUE)
endif()

find_path(ICONV_INCLUDE_DIR iconv.h
        /usr/include
        /usr/local/include
        /opt/local/include)

set(POTENTIAL_ICONV_LIBS iconv libiconv libiconv2)

find_library(ICONV_LIBRARY NAMES ${POTENTIAL_ICONV_LIBS}
        PATHS /usr/lib /usr/local/lib /opt/local/lib)

if(WIN32)
    set(ICONV_DLL_NAMES iconv.dll  libiconv.dll libiconv2.dll)
    find_file(ICONV_DLL
            NAMES ${ICONV_DLL_NAMES}
            PATHS ENV PATH
            NO_DEFAULT_PATH)
    find_file(ICONV_DLL_HELP
            NAMES ${ICONV_DLL_NAMES}
            PATHS ENV PATH
            ${ICONV_INCLUDE_DIR}/../bin)
    if(ICONV_FIND_REQUIRED)
        if(NOT ICONV_DLL AND NOT ICONV_DLL_HELP)
            message(FATAL_ERROR "Could not find iconv.dll, please add correct your PATH environment variable")
        endif()
        if(NOT ICONV_DLL AND ICONV_DLL_HELP)
            get_filename_component(ICONV_DLL_HELP ${ICONV_DLL_HELP} PATH)
            message(STATUS)
            message(STATUS "Could not find iconv.dll in standard search path, please add ")
            message(STATUS "${ICONV_DLL_HELP}")
            message(STATUS "to your PATH environment variable.")
            message(STATUS)
            message(FATAL_ERROR "exit cmake")
        endif()
    endif()
    if(ICONV_INCLUDE_DIR AND ICONV_LIBRARY AND ICONV_DLL)
        set(ICONV_FOUND TRUE)
    endif()
else()
    check_function_exists(iconv HAVE_ICONV_IN_LIBC)
    if(ICONV_INCLUDE_DIR AND HAVE_ICONV_IN_LIBC)
        set(ICONV_FOUND TRUE)
        set(ICONV_LIBRARY  CACHE TYPE STRING FORCE)
    endif()
    if(ICONV_INCLUDE_DIR AND ICONV_LIBRARY)
        set(ICONV_FOUND TRUE)
    endif()
endif()



if(ICONV_FOUND)
    if(NOT ICONV_FIND_QUIETLY)
        message(STATUS "Found iconv library: ${ICONV_LIBRARY}")
        #message(STATUS "Found iconv   dll  : ${ICONV_DLL}")
    endif()
else()
    if(ICONV_FIND_REQUIRED)
        message(STATUS "Looked for iconv library named ${POTENTIAL_ICONV_LIBS}.")
        message(STATUS "Found no acceptable iconv library. This is fatal.")
        message(STATUS "iconv header: ${ICONV_INCLUDE_DIR}")
        message(STATUS "iconv lib   : ${ICONV_LIBRARY}")
        message(FATAL_ERROR "Could NOT find iconv library")
    endif()
endif()

mark_as_advanced(ICONV_LIBRARY ICONV_INCLUDE_DIR)