# This module finds the TAUCS libraries.
#
# This module sets the following variables:
#  TAUCS_FOUND - Set to true if headers and libraries are found
#  TAUCS_INCLUDE_DIR - Directories containing the TAUCS header files
#  TAUCS_DEFINITIONS - Compilation options to use TAUCS
#  TAUCS_LIBRARIES_DIR - Directories containing the TAUCS libraries.
#     May be null if TAUCS_LIBRARIES contains libraries name using full path.
#  TAUCS_LIBRARIES - TAUCS libraries name.
#     May be null if the compiler supports auto-link (e.g. VC++).

include(GeneratorSpecificSettings)

# Is it already configured?
if (TAUCS_INCLUDE_DIR AND TAUCS_LIBRARIES_DIR)

  set(TAUCS_FOUND TRUE)

elseif (TAUCS_INCLUDE_DIR AND TAUCS_LIBRARIES)

  set(TAUCS_FOUND TRUE)

else()

  # Unused (yet)
  set(TAUCS_DEFINITIONS)

  # Look first for the TAUCS distributed with CGAL in auxiliary/taucs.
  # Set CGAL_TAUCS_FOUND, CGAL_TAUCS_INCLUDE_DIR and CGAL_TAUCS_LIBRARIES_DIR.
  include(CGAL_Locate_CGAL_TAUCS)

  # Search for TAUCS headers in ${CGAL_TAUCS_INCLUDE_DIR} (TAUCS shipped with CGAL),
  # else in $TAUCS_INC_DIR environment variable.
  if( CGAL_TAUCS_FOUND )
     set( TAUCS_INCLUDE_DIR  "${CGAL_TAUCS_INCLUDE_DIR}"
                             CACHE FILEPATH "Directories containing the TAUCS header files")
  else()
    find_path(TAUCS_INCLUDE_DIR
              NAMES taucs.h
              PATHS ${CGAL_TAUCS_INCLUDE_DIR}
                    ENV TAUCS_INC_DIR
              PATH_SUFFIXES taucs
              DOC "Directories containing the TAUCS header files"
             )
  endif()

  # Search for TAUCS libraries in ${CGAL_TAUCS_LIBRARIES_DIR} (TAUCS shipped with CGAL),
  # else in $TAUCS_LIB_DIR environment variable.
  if( CGAL_TAUCS_FOUND AND AUTO_LINK_ENABLED )
    # if VC++: done
    #message("DEBUG: TAUCS: VC++ case")
    set( TAUCS_LIBRARIES_DIR  "${CGAL_TAUCS_LIBRARIES_DIR}"
                              CACHE FILEPATH "Directories containing the TAUCS libraries")
  else()
    #message("DEBUG: TAUCS: Unix case")
    find_library(TAUCS_LIBRARY
                 NAMES "taucs"
                 PATHS ${CGAL_TAUCS_LIBRARIES_DIR}
                       ENV TAUCS_LIB_DIR
                 PATH_SUFFIXES taucs
                 DOC "TAUCS library"
                )
    find_library(METIS_LIBRARY
                 NAMES "metis"
                 PATHS ${CGAL_TAUCS_LIBRARIES_DIR}
                       ENV TAUCS_LIB_DIR
                 PATH_SUFFIXES taucs
                 DOC "Metis library"
                )
    if(TAUCS_LIBRARY AND METIS_LIBRARY)
      set( TAUCS_LIBRARIES  "${TAUCS_LIBRARY};${METIS_LIBRARY}"
                            CACHE FILEPATH "TAUCS libraries name" )
    endif()
  endif()

  if (TAUCS_INCLUDE_DIR AND TAUCS_LIBRARIES_DIR)
    set(TAUCS_FOUND TRUE)
  elseif (TAUCS_INCLUDE_DIR AND TAUCS_LIBRARIES)
    set(TAUCS_FOUND TRUE)
  else()
    set(TAUCS_FOUND FALSE)
  endif()

  if(NOT TAUCS_FIND_QUIETLY)
    if(TAUCS_FOUND)
      message(STATUS "TAUCS libraries found.")
    else(TAUCS_FOUND)
      if(TAUCS_FIND_REQUIRED)
        message(FATAL_ERROR "TAUCS libraries not found. Please specify libraries location.")
      else()
        message(STATUS "TAUCS libraries not found. Please specify libraries location.")
      endif()
    endif(TAUCS_FOUND)
  endif(NOT TAUCS_FIND_QUIETLY)

  #message("DEBUG: TAUCS_INCLUDE_DIR = ${TAUCS_INCLUDE_DIR}")
  #message("DEBUG: TAUCS_LIBRARIES = ${TAUCS_LIBRARIES}")
  #message("DEBUG: TAUCS_LIBRARIES_DIR = ${TAUCS_LIBRARIES_DIR}")
  #message("DEBUG: TAUCS_FOUND = ${TAUCS_FOUND}")

endif(TAUCS_INCLUDE_DIR AND TAUCS_LIBRARIES_DIR)

#mark_as_advanced(TAUCS_INCLUDE_DIR)
#mark_as_advanced(TAUCS_DEFINITIONS)
#mark_as_advanced(TAUCS_LIBRARIES)
#mark_as_advanced(TAUCS_LIBRARIES_DIR)