option (BUILD_EXAMPLES "Build the examples and tests." ON)
option (BUILD_EXAMPLES_FORTRAN "Build the FORTRAN examples and tests." OFF)

if (BUILD_EXAMPLES)
  # Make sure the compiler can find include files from our cminpack library.
  include_directories (${CMINPACK_SOURCE_DIR})

  # Make sure the linker can find the cminpack library once it is built.
  link_directories (${CMINPACK_BINARY_DIR})

  set (FPGM tchkder thybrd thybrd1 thybrj thybrj1 tlmder tlmder1 tlmdif tlmdif1 tlmstr tlmstr1)
  set (CPGM ${FPGM} tfdjac2)

  # cmpfiles could be used by runtest.cmake... for now it's unused
  add_executable (cmpfiles cmpfiles.c)

  # inspired by http://www.netlib.org/clapack/clapack-3.2.1-CMAKE/TESTING/CMakeLists.txt
  # except that here we have to compare the output to a reference
  macro(add_minpack_test testname reference)
    set(TEST_OUTPUT "${CMINPACK_BINARY_DIR}/examples/${testname}.out")
    set(TEST_REFERENCE "${CMINPACK_SOURCE_DIR}/examples/ref/${reference}.ref")
    get_target_property(TEST_LOC ${testname} LOCATION)
    add_test(${testname} "${CMAKE_COMMAND}"
      -DTEST=${TEST_LOC}
      -DOUTPUT=${TEST_OUTPUT} 
      -DREFERENCE=${TEST_REFERENCE} 
      -DINTDIR=${CMAKE_CFG_INTDIR}
      -P "${CMINPACK_SOURCE_DIR}/examples/runtest.cmake")
  endmacro(add_minpack_test)

  foreach (source ${CPGM})
    add_executable (${source}_ ${source}_.c)
    target_link_libraries (${source}_ cminpack)
    if (OS_LINUX)
      target_link_libraries (${source}_ m)
    endif (OS_LINUX)
    add_minpack_test(${source}_ ${source}c)
    add_executable (${source}c ${source}c.c)
    target_link_libraries (${source}c 3rd_cminpack)
    if (OS_LINUX)
      target_link_libraries (${source}c m)
    endif (OS_LINUX)
    add_minpack_test(${source}c ${source}c)
  endforeach(source)
endif (BUILD_EXAMPLES)

if (BUILD_EXAMPLES_FORTRAN)
  enable_language (Fortran OPTIONAL)
  if (CMAKE_Fortran_COMPILER_WORKS)
    foreach (FPGM_item ${FPGM})
      list (APPEND FPGM_SRCS ${CMINPACK_SOURCE_DIR}/examples/${FPGM_item}.f)
    endforeach (FPGM_item ${FPGM})

    # add the executable that will do the generation
    add_executable (genf77tests genf77tests.c)
    get_target_property (GENF77TESTS_EXE genf77tests LOCATION)
    add_custom_command (
      OUTPUT ${FPGM_SRCS}
      COMMAND ${GENF77TESTS_EXE} ${CMINPACK_SOURCE_DIR}/doc/minpack-documentation.txt
      WORKING_DIRECTORY ${CMINPACK_SOURCE_DIR}/examples
      DEPENDS genf77tests
      MAIN_DEPENDENCY ${CMINPACK_SOURCE_DIR}/doc/minpack-documentation.txt
      )
    foreach (source ${FPGM})
      add_executable (${source} ${source}.f)
      target_link_libraries (${source} 3rd_cminpack)
      add_minpack_test(${source} ${source})
    endforeach (source)
  endif (CMAKE_Fortran_COMPILER_WORKS)
endif (BUILD_EXAMPLES_FORTRAN)