# PROJECT ( YAP_REAL C )


#
# - This module locates an installed R distribution.
#
# Defines the following:
#  R_COMMAND           - Path to R command
#  R_HOME              - Path to 'R home', as reported by R
#  R_INCLUDE_DIR       - Path to R include directory
#  R_LIBRARY_BASE      - Path to R library
#  R_LIBRARY_BLAS      - Path to Rblas / blas library
#  R_LIBRARY_LAPACK    - Path to Rlapack / lapack library
#  R_LIBRARY_READLINE  - Path to readline library
#  R_LIBRARIES         - Array of: R_LIBRARY_BASE, R_LIBRARY_BLAS, R_LIBRARY_LAPACK, R_LIBRARY_BASE [, R_LIBRARY_READLINE]
#
#  VTK_R_HOME          - (deprecated, use R_HOME instead) Path to 'R home', as reported by R
#
# Variable search order:
#   1. Attempt to locate and set R_COMMAND
#     - If unsuccessful, generate error and prompt user to manually set R_COMMAND
#   2. Use R_COMMAND to set R_HOME
#   3. Locate other libraries in the priority:
#     1. Within a user-built instance of R at R_HOME
#     2. Within an installed instance of R
#     3. Within external system libraries
#

macro_optional_find_package (R ON)

if (R_LIBRARIES AND R_INCLUDE_DIR)

  set (REAL_SOURCES
    real.c
)

set (REAL_PL
  real.pl
)

add_to_group( REAL_PL  pl_library)

include_directories (
      ${CMAKE_CURRENT_BINARY_DIR}
      ${R_INCLUDE_DIR}
      )

    list (APPEND CMAKE_REQUIRED_INCLUDES
        ${CMAKE_CURRENT_BINARY_DIR}
        ${R_INCLUDE_DIR}
    )

  add_lib(real  ${REAL_SOURCES})

  target_link_libraries (real ${R_LIBRARIES}   libYap)

  check_include_files( "stdio.h;R.h" HAVE_R_H )
  check_include_files( "R.h;Rembedded.h" HAVE_R_EMBEDDED_H )
  check_include_files( "Rembedded.h;Rinterface.h" HAVE_R_INTERFACE_H )

  configure_file ("rconfig.h.cmake" "rconfig.h" )

 install(TARGETS  real
    RUNTIME DESTINATION ${YAP_INSTALL_DLLDIR}
    ARCHIVE DESTINATION ${YAP_INSTALL_DLLDIR}
    LIBRARY DESTINATION ${YAP_INSTALL_DLLDIR}
    )

  install(FILES real.pl
    DESTINATION ${libpl}
    )

  endif()