# This file copied from contrib/poco/cmake/FindODBC.cmake to allow build without submodules

#
# Find the ODBC driver manager includes and library.
#
# ODBC is an open standard for connecting to different databases in a
# semi-vendor-independent fashion.  First you install the ODBC driver
# manager.  Then you need a driver for each separate database you want
# to connect to (unless a generic one works).  VTK includes neither
# the driver manager nor the vendor-specific drivers: you have to find
# those yourself.
#
# This module defines
# ODBC_INCLUDE_DIRECTORIES, where to find sql.h
# ODBC_LIBRARIES, the libraries to link against to use ODBC
# ODBC_FOUND.  If false, you cannot build anything that requires ODBC.

option (ENABLE_ODBC "Enable ODBC" ${OS_LINUX})
if (OS_LINUX)
    option (USE_INTERNAL_ODBC_LIBRARY "Set to FALSE to use system odbc library instead of bundled" ${NOT_UNBUNDLED})
else ()
    option (USE_INTERNAL_ODBC_LIBRARY "Set to FALSE to use system odbc library instead of bundled" OFF)
endif ()

if (USE_INTERNAL_ODBC_LIBRARY AND NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/unixodbc/README")
    message (WARNING "submodule contrib/unixodbc is missing. to fix try run: \n git submodule update --init --recursive")
   set (USE_INTERNAL_ODBC_LIBRARY 0)
endif ()

if (ENABLE_ODBC)
    if (USE_INTERNAL_ODBC_LIBRARY)
        set (ODBC_LIBRARIES unixodbc)
        set (ODBC_INCLUDE_DIRECTORIES ${CMAKE_SOURCE_DIR}/contrib/unixodbc/include)
        set (ODBC_FOUND 1)
        set (USE_ODBC 1)
    else ()
        find_path(ODBC_INCLUDE_DIRECTORIES
            NAMES sql.h
            HINTS
            /usr/include
            /usr/include/iodbc
            /usr/include/odbc
            /usr/local/include
            /usr/local/include/iodbc
            /usr/local/include/odbc
            /usr/local/iodbc/include
            /usr/local/odbc/include
            "C:/Program Files/ODBC/include"
            "C:/Program Files/Microsoft SDKs/Windows/v7.0/include"
            "C:/Program Files/Microsoft SDKs/Windows/v6.0a/include"
            "C:/ODBC/include"
            DOC "Specify the directory containing sql.h."
        )

        find_library(ODBC_LIBRARIES
            NAMES iodbc odbc iodbcinst odbcinst odbc32
            HINTS
            /usr/lib
            /usr/lib/iodbc
            /usr/lib/odbc
            /usr/local/lib
            /usr/local/lib/iodbc
            /usr/local/lib/odbc
            /usr/local/iodbc/lib
            /usr/local/odbc/lib
            "C:/Program Files/ODBC/lib"
            "C:/ODBC/lib/debug"
            "C:/Program Files (x86)/Microsoft SDKs/Windows/v7.0A/Lib"
            DOC "Specify the ODBC driver manager library here."
        )

        # MinGW find usually fails
        if(MINGW)
            set(ODBC_INCLUDE_DIRECTORIES ".")
            set(ODBC_LIBRARIES odbc32)
        endif()

        include(FindPackageHandleStandardArgs)
        find_package_handle_standard_args(ODBC
            DEFAULT_MSG
            ODBC_INCLUDE_DIRECTORIES
            ODBC_LIBRARIES)

        mark_as_advanced(ODBC_FOUND ODBC_LIBRARIES ODBC_INCLUDE_DIRECTORIES)
    endif ()
endif ()

message (STATUS "Using odbc: ${ODBC_INCLUDE_DIRECTORIES} : ${ODBC_LIBRARIES}")