Merge topic 'add-cmake_reset_check_state'
9349d69
Add cmake_reset_check_state() macro
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cdfeda60f6
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@ -1,8 +1,10 @@
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# This module defines two macros:
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# This module defines three macros:
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# CMAKE_PUSH_CHECK_STATE()
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# and
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# CMAKE_POP_CHECK_STATE()
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# These two macros can be used to save and restore the state of the variables
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# and
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# CMAKE_RESET_CHECK_STATE()
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# These macros can be used to save, restore and reset (i.e., clear contents)
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# the state of the variables
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# CMAKE_REQUIRED_FLAGS, CMAKE_REQUIRED_DEFINITIONS, CMAKE_REQUIRED_LIBRARIES
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# and CMAKE_REQUIRED_INCLUDES used by the various Check-files coming with CMake,
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# like e.g. check_function_exists() etc.
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# but after the Find-module has been executed they should have the same value
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# as they had before.
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#
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# CMAKE_PUSH_CHECK_STATE() macro receives optional argument RESET. Whether it's specified,
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# CMAKE_PUSH_CHECK_STATE() will set all CMAKE_REQUIRED_* variables to empty values, same
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# as CMAKE_RESET_CHECK_STATE() call will do.
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#
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# Usage:
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# cmake_push_check_state()
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# set(CMAKE_REQUIRED_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} -DSOME_MORE_DEF)
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# cmake_push_check_state(RESET)
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# set(CMAKE_REQUIRED_DEFINITIONS -DSOME_MORE_DEF)
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# check_function_exists(...)
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# cmake_reset_check_state()
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# set(CMAKE_REQUIRED_DEFINITIONS -DANOTHER_DEF)
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# check_function_exists(...)
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# cmake_pop_check_state()
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@ -31,6 +40,15 @@
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# License text for the above reference.)
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macro(CMAKE_RESET_CHECK_STATE)
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set(CMAKE_REQUIRED_INCLUDES)
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set(CMAKE_REQUIRED_DEFINITIONS)
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set(CMAKE_REQUIRED_LIBRARIES)
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set(CMAKE_REQUIRED_FLAGS)
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endmacro()
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macro(CMAKE_PUSH_CHECK_STATE)
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if(NOT DEFINED _CMAKE_PUSH_CHECK_STATE_COUNTER)
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@ -43,6 +61,11 @@ macro(CMAKE_PUSH_CHECK_STATE)
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set(_CMAKE_REQUIRED_DEFINITIONS_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER} ${CMAKE_REQUIRED_DEFINITIONS})
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set(_CMAKE_REQUIRED_LIBRARIES_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER} ${CMAKE_REQUIRED_LIBRARIES})
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set(_CMAKE_REQUIRED_FLAGS_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER} ${CMAKE_REQUIRED_FLAGS})
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if (ARGC GREATER 0 AND ARGV0 STREQUAL "RESET")
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cmake_reset_check_state()
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endif()
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endmacro()
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macro(CMAKE_POP_CHECK_STATE)
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