Chris@49: # - Check if the prototype for a single argument math function exists.
Chris@49: # ARMA_CHECK_MATH_PROTO (FUNCTION NAMESPACE HEADER VARIABLE)
Chris@49: #
Chris@49: #  FUNCTION  - the name of the single argument math function you are looking for
Chris@49: #  NAMESPACE - the name of the namespace
Chris@49: #  HEADER    - the header(s) where the prototype should be declared
Chris@49: #  VARIABLE  - variable to store the result
Chris@49: #
Chris@49: # The following variables may be set before calling this macro to
Chris@49: # modify the way the check is run:
Chris@49: #
Chris@49: #  CMAKE_REQUIRED_FLAGS = string of compile command line flags
Chris@49: #  CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
Chris@49: #  CMAKE_REQUIRED_INCLUDES = list of include directories
Chris@49: 
Chris@49: # adapted from "CheckPrototypeExists.cmake"
Chris@49: # ( http://websvn.kde.org/trunk/KDE/kdelibs/cmake/modules/CheckPrototypeExists.cmake )
Chris@49: # on 2009-06-19 by Conrad Sanderson (conradsand at ieee dot org)
Chris@49: 
Chris@49: # original copyright for "CheckPrototypeExists.cmake":
Chris@49: #
Chris@49: # Copyright (c) 2006, Alexander Neundorf, <neundorf@kde.org>
Chris@49: #
Chris@49: # Redistribution and use is allowed according to the terms of the BSD license.
Chris@49: # For details see the accompanying COPYING-CMAKE-SCRIPTS file.
Chris@49: 
Chris@49: 
Chris@49: INCLUDE(CheckCXXSourceCompiles)
Chris@49: 
Chris@49: MACRO (ARMA_CHECK_MATH_PROTO _SYMBOL _NAMESPACE _HEADER _RESULT)
Chris@49: 
Chris@49:   SET(_INCLUDE_FILES)
Chris@49: 
Chris@49:   FOREACH (it ${_HEADER})
Chris@49:     SET(_INCLUDE_FILES "${_INCLUDE_FILES}#include <${it}>\n")
Chris@49:   ENDFOREACH (it)
Chris@49:    
Chris@49:   SET(_TMP_SOURCE_CODE "
Chris@49: ${_INCLUDE_FILES}
Chris@49: int main()
Chris@49:   {
Chris@49:   #if !defined(${_SYMBOL})
Chris@49:     int i = (${_NAMESPACE}::${_SYMBOL})(1.0);
Chris@49:   #endif
Chris@49:   return 0;
Chris@49:   }
Chris@49: ")
Chris@49: 
Chris@49:   CHECK_CXX_SOURCE_COMPILES("${_TMP_SOURCE_CODE}" ${_RESULT})
Chris@49: 
Chris@49: ENDMACRO (ARMA_CHECK_MATH_PROTO _SYMBOL _NAMESPACE _HEADER _RESULT)