#-------------------------------------------------------------------------------
# Add a compiler define flag if a variable is defined
#-------------------------------------------------------------------------------
function( compiler_define_if_found predicate name )
  if( ${predicate} )
    add_definitions( -D${name} )
  endif()
endfunction()

macro( define_default variable value )
  if( NOT DEFINED ${variable} )
    set( ${variable} ${value} )
  endif()
endmacro()

macro( component_status name flag found )
  if( ${flag} AND ${found} )
    set( STATUS_${name} "yes" )
  elseif( ${flag} AND NOT ${found} )
    set( STATUS_${name} "libs not found" )
  else()
    set( STATUS_${name} "disabled" )
  endif()
endmacro()

#-------------------------------------------------------------------------------
# Detect in source builds
#-------------------------------------------------------------------------------
function( CheckBuildDirectory )

  # Get Real Paths of the source and binary directories
  get_filename_component( srcdir "${CMAKE_SOURCE_DIR}" REALPATH )
  get_filename_component( bindir "${CMAKE_BINARY_DIR}" REALPATH )

  # Check for in-source builds
  if( ${srcdir} STREQUAL ${bindir} )
    message( FATAL_ERROR "XRootD cannot be built in-source! "
                         "Please run cmake <src-dir> outside the "
                         "source directory and be sure to remove "
                         "CMakeCache.txt or CMakeFiles if they "
                         "exist in the source directory." )
  endif()

endfunction()

#-------------------------------------------------------------------------------
# Detect what kind of solaris machine we're running
#-------------------------------------------------------------------------------
macro( define_solaris_flavor )
  execute_process( COMMAND isainfo
                   OUTPUT_VARIABLE SOLARIS_ARCH )
  string( REPLACE " " ";" SOLARIS_ARCH_LIST ${SOLARIS_ARCH} )

  # amd64 (opteron)
  list( FIND SOLARIS_ARCH_LIST amd64 SOLARIS_AMD64 )
  if( SOLARIS_AMD64 EQUAL -1 )
    set( SOLARIS_AMD64 FALSE )
  else()
    set( SOLARIS_AMD64 TRUE )
  endif()

endmacro()

#-------------------------------------------------------------------------------
# Install headers from a directory
#-------------------------------------------------------------------------------
function( install_headers destination files )
  foreach( file ${files} )
    string( REGEX MATCH "^(.+)/(.+)$" fileAr ${file} )
    install( FILES ${file} DESTINATION ${destination}/${CMAKE_MATCH_1} )
  endforeach()
endfunction()