# Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
#
# The MySQL Connector/ODBC is licensed under the terms of the GPLv2
# <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
# MySQL Connectors. There are special exceptions to the terms and
# conditions of the GPLv2 as it is applied to this software, see the
# FLOSS License Exception
# <http://www.mysql.com/about/legal/licensing/foss-exception.html>.
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published
# by the Free Software Foundation; version 2 of the License.
# 
# 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
# for more details.
# 
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA

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

SET(LTDL_LIBS "ltdl")

IF(LTDL_PATH)

  SET(LTDL_INCLUDES "${LTDL_PATH}/include")
  SET(LTDL_LIB_DIR "${LTDL_PATH}/lib")
  SET(LTDL_LFLAGS "-L${LTDL_LIB_DIR}")

  IF(NOT LTDL_LINK_DYNAMIC AND EXISTS "${LTDL_LIB_DIR}/libltdl.a")
    SET(LTDL_LIBS "${LTDL_LIB_DIR}/libltdl.a")
  ENDIF(NOT LTDL_LINK_DYNAMIC AND EXISTS "${LTDL_LIB_DIR}/libltdl.a")

ELSE(LTDL_PATH)

  INCLUDE (CheckIncludeFiles)
  CHECK_INCLUDE_FILES(ltdl.h HAVE_LTDL_H)

  IF(NOT HAVE_LTDL_H)
    MESSAGE(FATAL_ERROR "ltdl.h could not be found")
  ENDIF(NOT HAVE_LTDL_H)

  INCLUDE (CheckLibraryExists)
  CHECK_LIBRARY_EXISTS(ltdl lt_dlopen "" HAVE_LTDL_LIB)

  IF(NOT HAVE_LTDL_LIB)
    MESSAGE(FATAL_ERROR "ltdl lib could not be found")
  ENDIF(NOT HAVE_LTDL_LIB)

ENDIF(LTDL_PATH)

TRY_COMPILE(COMPILE_RESULT ${CMAKE_SOURCE_DIR}/cmake/CMakeTmp ${CMAKE_SOURCE_DIR}/cmake/needdl.c
            CMAKE_FLAGS -DINCLUDE_DIRECTORIES=${LTDL_INCLUDES}
            -DLINK_DIRECTORIES=${LTDL_LIB_DIR}
            -DLINK_LIBRARIES=${LTDL_LIBS}
            OUTPUT_VARIABLE     COMPILE_OUTPUT)

# Perhaps to add try_compile with dl would be safer
IF(COMPILE_RESULT) 
  MESSAGE(STATUS "Checking if need to link dl - FALSE")
ElSE(COMPILE_RESULT) 
  MESSAGE(STATUS "Checking if need to link dl - TRUE")
  SET(LTDL_LIBS ${LTDL_LIBS} "dl")
ENDIF(COMPILE_RESULT)