source: BAORadio/libindi/v1.0.1/cmake_modules/MacroLogFeature.cmake@ 642

# This file defines the Feature Logging macros.
#
# MACRO_LOG_FEATURE(VAR FEATURE DESCRIPTION URL [REQUIRED [MIN_VERSION [COMMENTS]]])
#   Logs the information so that it can be displayed at the end
#   of the configure run
#   VAR : TRUE or FALSE, indicating whether the feature is supported
#   FEATURE: name of the feature, e.g. "libjpeg"
#   DESCRIPTION: description what this feature provides
#   URL: home page
#   REQUIRED: TRUE or FALSE, indicating whether the featue is required
#   MIN_VERSION: minimum version number. empty string if unneeded
#   COMMENTS: More info you may want to provide.  empty string if unnecessary
#
# MACRO_DISPLAY_FEATURE_LOG()
#   Call this to display the collected results.
#   Exits CMake with a FATAL error message if a required feature is missing
#
# Example:
#
# INCLUDE(MacroLogFeature)
#
# FIND_PACKAGE(JPEG)
# MACRO_LOG_FEATURE(JPEG_FOUND "libjpeg" "Support JPEG images" "http://www.ijg.org" TRUE "3.2a" "")
# ...
# MACRO_DISPLAY_FEATURE_LOG()

# Copyright (c) 2006, Alexander Neundorf, <neundorf@kde.org>
# Copyright (c) 2006, Allen Winter, <winter@kde.org>
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.

IF (NOT _macroLogFeatureAlreadyIncluded)
   SET(_file ${CMAKE_BINARY_DIR}/MissingRequirements.txt)
   IF (EXISTS ${_file})
      FILE(REMOVE ${_file})
   ENDIF (EXISTS ${_file})

   SET(_file ${CMAKE_BINARY_DIR}/EnabledFeatures.txt)
   IF (EXISTS ${_file})
      FILE(REMOVE ${_file})
   ENDIF (EXISTS ${_file})

   SET(_file ${CMAKE_BINARY_DIR}/DisabledFeatures.txt)
   IF (EXISTS ${_file})
      FILE(REMOVE ${_file})
  ENDIF (EXISTS ${_file})

  SET(_macroLogFeatureAlreadyIncluded TRUE)
ENDIF (NOT _macroLogFeatureAlreadyIncluded)


MACRO(MACRO_LOG_FEATURE _var _package _description _url ) # _required _minvers _comments)

   SET(_required "${ARGV4}")
   SET(_minvers "${ARGV5}")
   SET(_comments "${ARGV6}")

   IF (${_var})
     SET(_LOGFILENAME ${CMAKE_BINARY_DIR}/EnabledFeatures.txt)
   ELSE (${_var})
     IF (${_required} MATCHES "[Tt][Rr][Uu][Ee]")
       SET(_LOGFILENAME ${CMAKE_BINARY_DIR}/MissingRequirements.txt)
     ELSE (${_required} MATCHES "[Tt][Rr][Uu][Ee]")
       SET(_LOGFILENAME ${CMAKE_BINARY_DIR}/DisabledFeatures.txt)
     ENDIF (${_required} MATCHES "[Tt][Rr][Uu][Ee]")
   ENDIF (${_var})

   SET(_logtext "+ ${_package}")

   IF (NOT ${_var})
      IF (${_minvers} MATCHES ".*")
        SET(_logtext "${_logtext}, ${_minvers}")
      ENDIF (${_minvers} MATCHES ".*")
      SET(_logtext "${_logtext}: ${_description} <${_url}>")
      IF (${_comments} MATCHES ".*")
        SET(_logtext "${_logtext}\n${_comments}")
      ENDIF (${_comments} MATCHES ".*")
#      SET(_logtext "${_logtext}\n") #double-space missing features?
   ENDIF (NOT ${_var})
   FILE(APPEND "${_LOGFILENAME}" "${_logtext}\n")
 
ENDMACRO(MACRO_LOG_FEATURE)


MACRO(MACRO_DISPLAY_FEATURE_LOG)

   SET(_file ${CMAKE_BINARY_DIR}/MissingRequirements.txt)
   IF (EXISTS ${_file})
      FILE(READ ${_file} _requirements)
      MESSAGE(STATUS "\n-----------------------------------------------------------------------------\n-- The following REQUIRED packages could NOT be located on your system.\n-- Please install them before continuing this software installation.\n-----------------------------------------------------------------------------\n${_requirements}-----------------------------------------------------------------------------")
      FILE(REMOVE ${_file})
      MESSAGE(FATAL_ERROR "Exiting: Missing Requirements")
   ENDIF (EXISTS ${_file})

   SET(_summary "\n")

   SET(_elist 0)
   SET(_file ${CMAKE_BINARY_DIR}/EnabledFeatures.txt)
   IF (EXISTS ${_file})
      SET(_elist 1)
      FILE(READ ${_file} _enabled)
      FILE(REMOVE ${_file})
      SET(_summary "${_summary}-----------------------------------------------------------------------------\n-- The following external packages were located on your system.\n-- This installation will have the extra features provided by these packages.\n${_enabled}")
   ENDIF (EXISTS ${_file})

   SET(_dlist 0)
   SET(_file ${CMAKE_BINARY_DIR}/DisabledFeatures.txt)
   IF (EXISTS ${_file})
      SET(_dlist 1)
      FILE(READ ${_file} _disabled)
      FILE(REMOVE ${_file})
      SET(_summary "${_summary}-----------------------------------------------------------------------------\n-- The following OPTIONAL packages could NOT be located on your system.\n-- Consider installing them to enable more features from this software.\n${_disabled}")
   ELSE (EXISTS ${_file})
      IF (${_elist})
        SET(_summary "${_summary}Congratulations! All external packages have been found.\n")
      ENDIF (${_elist})
   ENDIF (EXISTS ${_file})

   IF (${_elist} OR ${_dlist})
      SET(_summary "${_summary}-----------------------------------------------------------------------------\n")
   ENDIF (${_elist} OR ${_dlist})
   MESSAGE(STATUS "${_summary}")

ENDMACRO(MACRO_DISPLAY_FEATURE_LOG)