# - Check if the system has the specified type

# CHECK_TYPE_EXISTS (TYPE HEADER VARIABLE)

#

#  TYPE - the name of the type or struct or class you are interested in

#  HEADER - the header(s) where the prototype should be declared

#  VARIABLE - variable to store the result

#

# The following variables may be set before calling this macro to

# modify the way the check is run:

#

#  CMAKE_REQUIRED_FLAGS = string of compile command line flags

#  CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)

#  CMAKE_REQUIRED_INCLUDES = list of include directories

# Copyright (c) 2009, Michihiro NAKAJIMA

# Copyright (c) 2006, Alexander Neundorf, <neundorf@kde.org>

#

# Redistribution and use is allowed according to the terms of the BSD license.

# For details see the accompanying COPYING-CMAKE-SCRIPTS file.

INCLUDE(CheckCSourceCompiles)

MACRO (CHECK_TYPE_EXISTS _TYPE _HEADER _RESULT)

   SET(_INCLUDE_FILES)

   FOREACH (it ${_HEADER})

      SET(_INCLUDE_FILES "${_INCLUDE_FILES}#include <${it}>\n")

   ENDFOREACH (it)

   SET(_CHECK_TYPE_EXISTS_SOURCE_CODE "

${_INCLUDE_FILES}

int main()

{

   static ${_TYPE} tmp;

   if (sizeof(tmp))

      return 0;

  return 0;

}

")

   CHECK_C_SOURCE_COMPILES("${_CHECK_TYPE_EXISTS_SOURCE_CODE}" ${_RESULT})

ENDMACRO (CHECK_TYPE_EXISTS)