cmake/FindODBC.cmake

# Copyright (c) 2007, 2024, Oracle and/or its affiliates.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License, version 2.0, as
# published by the Free Software Foundation.
#
# This program is designed to work with certain software (including
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# designated in a particular file or component or in included license
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# separately licensed software that they have either included with
# the program or referenced in the documentation.
#
# Without limiting anything contained in the foregoing, this file,
# which is part of Connector/ODBC, is also subject to the
# Universal FOSS Exception, version 1.0, a copy of which can be found at
# https://oss.oracle.com/licenses/universal-foss-exception.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the GNU General Public License, version 2.0, for more details.
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# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

##########################################################################

MACRO(_FIX_NOPREFIX VAR _odbc_config _param)
    EXECUTE_PROCESS(COMMAND ${_odbc_config} ${_param}
                     OUTPUT_VARIABLE _output
                   )
    STRING(REGEX REPLACE "\n" "" _output "${_output}")

    IF(${VAR} MATCHES "/noprefix")

      IF(NOT GUESSED_PREFIX)

        GET_FILENAME_COMPONENT(GUESSED_PREFIX "${_odbc_config}" PATH)
        GET_FILENAME_COMPONENT(GUESSED_PREFIX "${GUESSED_PREFIX}" PATH)
        
      ENDIF(NOT GUESSED_PREFIX)

      STRING(REGEX REPLACE "/noprefix" "${GUESSED_PREFIX}" _output "${_output}")

    ENDIF(${VAR} MATCHES "/noprefix")

    SET(${VAR} ${_output})
ENDMACRO(_FIX_NOPREFIX VAR _odbc_config _param)


IF(ODBC_INCLUDES)
  INCLUDE_DIRECTORIES(${ODBC_INCLUDES})

  IF(ODBCINST_INCLUDES)
    INCLUDE_DIRECTORIES(${ODBCINST_INCLUDES})
  ENDIF(ODBCINST_INCLUDES)

ENDIF(ODBC_INCLUDES)

IF(ODBC_LIB_DIR)

  IF(ODBCINST_LIB_DIR)
    SET(ODBC_LINK_FLAGS "-L${ODBC_LIB_DIR} -L${ODBCINST_LIB_DIR} -l${ODBCLIB} -l${ODBCINSTLIB}")
    SET(ODBC_DRIVER_LINK_FLAGS "-L${ODBC_LIB_DIR} -L${ODBCINST_LIB_DIR} -l${ODBCINSTLIB}")
  ELSE(ODBCINST_LIB_DIR)
    SET(ODBC_LINK_FLAGS "-L${ODBC_LIB_DIR} -l${ODBCLIB} -l${ODBCINSTLIB}")
    SET(ODBC_DRIVER_LINK_FLAGS "-L${ODBC_LIB_DIR} -l${ODBCINSTLIB}")
  ENDIF(ODBCINST_LIB_DIR)


ENDIF(ODBC_LIB_DIR)


# No need to look for (i)odbc[_-]config and run it
IF(NOT ODBC_INCLUDES OR NOT ODBC_LIB_DIR)

  IF(WITH_UNIXODBC)
    # check for location of odbc_config
    FIND_PROGRAM(ODBC_CONFIG odbc_config
          PATHS
          $ENV{ODBC_PATH}/bin)
      
    IF(NOT ODBC_CONFIG)
      MESSAGE(STATUS "Couldn't find unixODBC' odbc_config")

      #odbc config may be not present, and that can be ok
      IF(NOT ODBC_INCLUDES)

        INCLUDE (CheckIncludeFiles)
        CHECK_INCLUDE_FILES(sql.h HAVE_SQL_H)

        IF(NOT HAVE_SQL_H)
          MESSAGE(FATAL_ERROR "sql.h is not found either!")
        ENDIF(NOT HAVE_SQL_H)

      ENDIF(NOT ODBC_INCLUDES)

      
      IF(NOT ODBC_LIB_DIR)

        INCLUDE (CheckLibraryExists)
        CHECK_LIBRARY_EXISTS(odbc SQLConnect "" HAVE_ODBC_LIB)

        IF(NOT HAVE_ODBC_LIB)
          MESSAGE(FATAL_ERROR "odbc lib is not found either!")
        ENDIF(NOT HAVE_ODBC_LIB)

        SET(ODBC_LINK_FLAGS "-l${ODBCLIB} -l${ODBCINSTLIB}")

      ENDIF(NOT ODBC_LIB_DIR)

    ELSE(NOT ODBC_CONFIG)
      MESSAGE(STATUS "unixODBC: Found odbc_config in ${ODBC_CONFIG}")

      IF(NOT ODBC_INCLUDES)
        _FIX_NOPREFIX(ODBC_INCLUDE_DIR ${ODBC_CONFIG} "--include-prefix")
        INCLUDE_DIRECTORIES(${ODBC_INCLUDE_DIR})
      ENDIF(NOT ODBC_INCLUDES)

      IF(NOT ODBC_LIB_DIR)
        _FIX_NOPREFIX(ODBC_LINK_FLAGS ${ODBC_CONFIG} "--libs")
      ENDIF(NOT ODBC_LIB_DIR)

    ENDIF(NOT ODBC_CONFIG)

  ELSE(WITH_UNIXODBC)

    FIND_PROGRAM(ODBC_CONFIG iodbc-config
          PATHS
          $ENV{ODBC_PATH}/bin)
      
    IF(NOT ODBC_CONFIG)
      MESSAGE(FATAL_ERROR "Couldn't find iODBC")
    ENDIF(NOT ODBC_CONFIG)

    MESSAGE(STATUS "iODBC: Found iodbc-config in ${ODBC_CONFIG}")


    IF(NOT ODBC_INCLUDES)
      _FIX_NOPREFIX(ODBC_CFLAGS ${ODBC_CONFIG} "--cflags")
      STRING(STRIP "${ODBC_CFLAGS}" ODBC_CFLAGS)
      MESSAGE(STATUS "ODBC cflags: ${ODBC_CFLAGS}")
    ENDIF(NOT ODBC_INCLUDES)

    IF(NOT ODBC_LIB_DIR)
      _FIX_NOPREFIX(ODBC_LINK_FLAGS ${ODBC_CONFIG} "--libs")
    ENDIF(NOT ODBC_LIB_DIR)

    STRING(STRIP "${ODBC_LINK_FLAGS}" ODBC_LINK_FLAGS)
    MESSAGE(STATUS "ODBC LINK flags: ${ODBC_LINK_FLAGS}")

  ENDIF(WITH_UNIXODBC)
ENDIF(NOT ODBC_INCLUDES OR NOT ODBC_LIB_DIR)