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# Include CHECK_INCLUDE_FILE_CXX macro used by this macro.
INCLUDE (${CMAKE_ROOT}/Modules/CheckIncludeFileCXX.cmake)
#-----------------------------------------------------------------------------
# Macro to select whether to use old streams or ANSI streams.
# Argument is the variable to set with the result (VTK_USE_ANSI_STDLIB).
MACRO(VTK_SELECT_STREAMS_LIBRARY var VTK_SOURCE_DIR)
IF("${var}" MATCHES "^${var}$")
CHECK_INCLUDE_FILE_CXX("iosfwd" VTK_HAVE_ANSI_STREAMS)
CHECK_INCLUDE_FILE_CXX("iostream.h" VTK_HAVE_OLD_STREAMS)
IF(VTK_HAVE_OLD_STREAMS)
# Some compilers have iostream.h but not strstream.h
# or strstrea.h. Treat these as not having old streams.
CHECK_INCLUDE_FILE_CXX("strstrea.h" VTK_HAVE_OLD_STRSTREA_H)
CHECK_INCLUDE_FILE_CXX("strstream.h" VTK_HAVE_OLD_STRSTREAM_H)
IF(NOT VTK_HAVE_OLD_STRSTREAM_H)
IF(NOT VTK_HAVE_OLD_STRSTREA_H)
SET(VTK_HAVE_OLD_STREAMS 0)
ENDIF(NOT VTK_HAVE_OLD_STRSTREA_H)
ENDIF(NOT VTK_HAVE_OLD_STRSTREAM_H)
ENDIF(VTK_HAVE_OLD_STREAMS)
IF(VTK_HAVE_ANSI_STREAMS AND VTK_HAVE_OLD_STREAMS)
# Have both old and new streams. Provide the option.
# Default to OFF for MSVC 6 and ON for all others.
SET(${var}_DEFAULT ON)
IF(NOT CMAKE_COMPILER_IS_GNUCXX)
IF("VTK_COMPILER_IS_VC6" MATCHES "^VTK_COMPILER_IS_VC6$")
MESSAGE(STATUS "Checking if compiler is VC6")
TRY_COMPILE(VTK_COMPILER_IS_VC6
${CMAKE_CURRENT_BINARY_DIR}/CMakeTmp
${VTK_SOURCE_DIR}/CMake/vtkTestCompilerIsVC6.cxx
OUTPUT_VARIABLE OUTPUT)
IF(VTK_COMPILER_IS_VC6)
MESSAGE(STATUS "Checking if compiler is VC6 -- yes")
SET(VTK_COMPILER_IS_VC6 1 CACHE INTERNAL "Compiler is MSVC 6")
ELSE(VTK_COMPILER_IS_VC6)
MESSAGE(STATUS "Checking if compiler is VC6 -- no")
SET(VTK_COMPILER_IS_VC6 0 CACHE INTERNAL "Compiler is MSVC 6")
WRITE_FILE(${CMAKE_BINARY_DIR}/CMakeFiles/CMakeError.log
"Determining if the compiler is MSVC 6 "
"failed with the following output:\n"
"${OUTPUT}\n" APPEND)
ENDIF(VTK_COMPILER_IS_VC6)
ENDIF("VTK_COMPILER_IS_VC6" MATCHES "^VTK_COMPILER_IS_VC6$")
IF(VTK_COMPILER_IS_VC6)
SET(${var}_DEFAULT OFF)
ENDIF(VTK_COMPILER_IS_VC6)
ENDIF(NOT CMAKE_COMPILER_IS_GNUCXX)
OPTION(${var} "Use the ANSI standard iostream library." ${${var}_DEFAULT})
MARK_AS_ADVANCED(${var})
ELSE(VTK_HAVE_ANSI_STREAMS AND VTK_HAVE_OLD_STREAMS)
IF(VTK_HAVE_ANSI_STREAMS)
# Have only new streams. Use them.
SET(${var} ON)
ELSE(VTK_HAVE_ANSI_STREAMS)
# Have only old streams. Use them.
SET(${var} OFF)
ENDIF(VTK_HAVE_ANSI_STREAMS)
ENDIF(VTK_HAVE_ANSI_STREAMS AND VTK_HAVE_OLD_STREAMS)
ENDIF("${var}" MATCHES "^${var}$")
ENDMACRO(VTK_SELECT_STREAMS_LIBRARY var)
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