# Find TAUCS library shipped with CGAL
#
# This module searches for TAUCS in CGAL "auxiliary" folder
# and in in $CGAL_TAUCS_DIR environment variable.
#
# This module sets the following variables:
#  CGAL_TAUCS_FOUND - set to true if TAUCS library shipped with CGAL
#    is found
#  CGAL_TAUCS_PLATFORM - name of TAUCS subfolder corresponding to the current compiler
#  CGAL_TAUCS_INCLUDE_DIR - list of folders (using full path name) containing
#    TAUCS (and optionaly BLAS and LAPACK) headers
#  CGAL_TAUCS_LIBRARIES_DIR -list of folders (using full path name) containing
#    TAUCS (and optionaly BLAS and LAPACK) libraries

if ( NOT CGAL_TAUCS_FOUND )

  #
  # Find out TAUCS name for the current platform.
  # This code is a translation of TAUCS "configure" script.
  #

  # The first task is to figure out CMAKE_SYSTEM_NAME
  # (on unix this is uname -s, for windows it is Windows).
  #message("DEBUG: CMAKE_SYSTEM_NAME = ${CMAKE_SYSTEM_NAME}")
  #message("DEBUG: CMAKE_SYSTEM_PROCESSOR = ${CMAKE_SYSTEM_PROCESSOR}")
  set( CGAL_TAUCS_PLATFORM "${CMAKE_SYSTEM_NAME}" )

  # Convert to lower case
  STRING(TOLOWER "${CGAL_TAUCS_PLATFORM}" CGAL_TAUCS_PLATFORM)

  # Sometimes uname returns a value that is
  # inconsistent with the way CGAL_TAUCS_PLATFORM is set. For example, on
  # Solaris, CGAL_TAUCS_PLATFORM=solaris but uname returns SunOS.
  if ( ${CGAL_TAUCS_PLATFORM} STREQUAL "sunos" )
    set( CGAL_TAUCS_PLATFORM "solaris" )
  endif()
  if ( ${CGAL_TAUCS_PLATFORM} STREQUAL "windows" )
    set( CGAL_TAUCS_PLATFORM "win32" )
  endif()

  # LS 2007: added "darwin_intel" for Intel Macs.
  # "darwin" = original Darwin platform = PowerPC architecture.
  if ( ${CGAL_TAUCS_PLATFORM} STREQUAL "darwin" )
    # CMAKE_SYSTEM_PROCESSOR=uname -p
    if ( ${CMAKE_SYSTEM_PROCESSOR} STREQUAL "i386" )
      set( CGAL_TAUCS_PLATFORM "darwin_intel" )
    endif()
  endif()

  # LS 2007: append "64" if 64 bits processor (tested on Linux only)

  if ( ${CGAL_TAUCS_PLATFORM} STREQUAL "linux" )
    # CMAKE_SYSTEM_PROCESSOR=uname -p
    if ( ${CMAKE_SYSTEM_PROCESSOR} MATCHES ".*64.*" )
      set( CGAL_TAUCS_PLATFORM "${CGAL_TAUCS_PLATFORM}64" )
    endif()
  endif()

  #message("DEBUG: CGAL_TAUCS_PLATFORM = ${CGAL_TAUCS_PLATFORM}")


  #
  # Search for TAUCS folder.
  #

  if ( MSVC )

    # Search for TAUCS in CGAL "auxiliary" folder
    if ( EXISTS "${CGAL_SOURCE_DIR}/auxiliary/taucs" )
      set( CGAL_TAUCS_INCLUDE_DIR   "${CGAL_SOURCE_DIR}/auxiliary/taucs/include")
      set( CGAL_TAUCS_LIBRARIES_DIR "${CGAL_SOURCE_DIR}/auxiliary/taucs/lib"    )
      set( CGAL_TAUCS_FOUND TRUE )
    endif()

  else ( MSVC )

    # Check $CGAL_TAUCS_DIR environment variable
    fetch_env_var(CGAL_TAUCS_DIR)
    if ( NOT "${CGAL_TAUCS_DIR}" STREQUAL "" )
      if ( EXISTS ${CGAL_TAUCS_DIR} )

          set( CGAL_TAUCS_INCLUDE_DIR   "${CGAL_TAUCS_DIR}/build/${CGAL_TAUCS_PLATFORM}"
                                        "${CGAL_TAUCS_DIR}/src" )
          set( CGAL_TAUCS_LIBRARIES_DIR "${CGAL_TAUCS_DIR}/external/lib/${CGAL_TAUCS_PLATFORM}"
                                        "${CGAL_TAUCS_DIR}/lib/${CGAL_TAUCS_PLATFORM}" )
          set( CGAL_TAUCS_FOUND TRUE )

      endif()
    endif()

  endif ( MSVC )

  #message("DEBUG: CGAL_TAUCS_INCLUDE_DIR = ${CGAL_TAUCS_INCLUDE_DIR}")
  #message("DEBUG: CGAL_TAUCS_LIBRARIES_DIR = ${CGAL_TAUCS_LIBRARIES_DIR}")
  #message("DEBUG: CGAL_TAUCS_FOUND = ${CGAL_TAUCS_FOUND}")

endif ( NOT CGAL_TAUCS_FOUND )