# - Check if the given struct or class has the specified member variable
# CHECK_STRUCT_MEMBER (STRUCT MEMBER HEADER VARIABLE)
#
# STRUCT - the name of the struct or class you are interested in
# MEMBER - the member which existence you want to check
# 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) 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_STRUCT_MEMBER _STRUCT _MEMBER _HEADER _RESULT)
SET(_INCLUDE_FILES)
FOREACH (it ${_HEADER})
SET(_INCLUDE_FILES "${_INCLUDE_FILES}#include <${it}>\n")
ENDFOREACH (it)

SET(_CHECK_STRUCT_MEMBER_SOURCE_CODE "
${_INCLUDE_FILES}
int main()
{
static ${_STRUCT} tmp;
if (sizeof(tmp.${_MEMBER}))
return 0;
return 0;
}
")
CHECK_C_SOURCE_COMPILES("${_CHECK_STRUCT_MEMBER_SOURCE_CODE}" ${_RESULT})

ENDMACRO (CHECK_STRUCT_MEMBER)

