1# this module defines two macros:
2# MACRO_PUSH_REQUIRED_VARS()
3# and
4# MACRO_POP_REQUIRED_VARS()
5# use these if you call cmake macros which use
6# any of the CMAKE_REQUIRED_XXX variables
7#
8# Usage:
9# MACRO_PUSH_REQUIRED_VARS()
10# SET(CMAKE_REQUIRED_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} -DSOME_MORE_DEF)
11# CHECK_FUNCTION_EXISTS(...)
12# MACRO_POP_REQUIRED_VARS()
13
14# Copyright (c) 2006, Alexander Neundorf, <neundorf@kde.org>
15#
16# Redistribution and use is allowed according to the terms of the BSD license.
17# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
18
19MACRO(MACRO_PUSH_REQUIRED_VARS)
20
21   IF(NOT DEFINED _PUSH_REQUIRED_VARS_COUNTER)
22      SET(_PUSH_REQUIRED_VARS_COUNTER 0)
23   ENDIF(NOT DEFINED _PUSH_REQUIRED_VARS_COUNTER)
24
25   MATH(EXPR _PUSH_REQUIRED_VARS_COUNTER "${_PUSH_REQUIRED_VARS_COUNTER}+1")
26
27   SET(_CMAKE_REQUIRED_INCLUDES_SAVE_${_PUSH_REQUIRED_VARS_COUNTER}    ${CMAKE_REQUIRED_INCLUDES})
28   SET(_CMAKE_REQUIRED_DEFINITIONS_SAVE_${_PUSH_REQUIRED_VARS_COUNTER} ${CMAKE_REQUIRED_DEFINITIONS})
29   SET(_CMAKE_REQUIRED_LIBRARIES_SAVE_${_PUSH_REQUIRED_VARS_COUNTER}   ${CMAKE_REQUIRED_LIBRARIES})
30   SET(_CMAKE_REQUIRED_FLAGS_SAVE_${_PUSH_REQUIRED_VARS_COUNTER}       ${CMAKE_REQUIRED_FLAGS})
31ENDMACRO(MACRO_PUSH_REQUIRED_VARS)
32
33MACRO(MACRO_POP_REQUIRED_VARS)
34
35# don't pop more than we pushed
36   IF("${_PUSH_REQUIRED_VARS_COUNTER}" GREATER "0")
37
38      SET(CMAKE_REQUIRED_INCLUDES    ${_CMAKE_REQUIRED_INCLUDES_SAVE_${_PUSH_REQUIRED_VARS_COUNTER}})
39      SET(CMAKE_REQUIRED_DEFINITIONS ${_CMAKE_REQUIRED_DEFINITIONS_SAVE_${_PUSH_REQUIRED_VARS_COUNTER}})
40      SET(CMAKE_REQUIRED_LIBRARIES   ${_CMAKE_REQUIRED_LIBRARIES_SAVE_${_PUSH_REQUIRED_VARS_COUNTER}})
41      SET(CMAKE_REQUIRED_FLAGS       ${_CMAKE_REQUIRED_FLAGS_SAVE_${_PUSH_REQUIRED_VARS_COUNTER}})
42
43      MATH(EXPR _PUSH_REQUIRED_VARS_COUNTER "${_PUSH_REQUIRED_VARS_COUNTER}-1")
44   ENDIF("${_PUSH_REQUIRED_VARS_COUNTER}" GREATER "0")
45
46ENDMACRO(MACRO_POP_REQUIRED_VARS)
47
48