open source pkg v1

pkg/OpenFace/cmake/modules/CMakePushCheckState.cmake

@@ -0,0 +1,86 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+#.rst:
+# CMakePushCheckState
+# -------------------
+#
+#
+#
+# This module defines three macros: CMAKE_PUSH_CHECK_STATE()
+# CMAKE_POP_CHECK_STATE() and CMAKE_RESET_CHECK_STATE() These macros can
+# be used to save, restore and reset (i.e., clear contents) the state of
+# the variables CMAKE_REQUIRED_FLAGS, CMAKE_REQUIRED_DEFINITIONS,
+# CMAKE_REQUIRED_LIBRARIES, CMAKE_REQUIRED_INCLUDES and CMAKE_EXTRA_INCLUDE_FILES
+# used by the various Check-files coming with CMake, like e.g.
+# check_function_exists() etc.  The variable contents are pushed on a
+# stack, pushing multiple times is supported.  This is useful e.g.  when
+# executing such tests in a Find-module, where they have to be set, but
+# after the Find-module has been executed they should have the same
+# value as they had before.
+#
+# CMAKE_PUSH_CHECK_STATE() macro receives optional argument RESET.
+# Whether it's specified, CMAKE_PUSH_CHECK_STATE() will set all
+# CMAKE_REQUIRED_* variables to empty values, same as
+# CMAKE_RESET_CHECK_STATE() call will do.
+#
+# Usage:
+#
+# ::
+#
+#    cmake_push_check_state(RESET)
+#    set(CMAKE_REQUIRED_DEFINITIONS -DSOME_MORE_DEF)
+#    check_function_exists(...)
+#    cmake_reset_check_state()
+#    set(CMAKE_REQUIRED_DEFINITIONS -DANOTHER_DEF)
+#    check_function_exists(...)
+#    cmake_pop_check_state()
+
+macro(CMAKE_RESET_CHECK_STATE)
+
+   set(CMAKE_EXTRA_INCLUDE_FILES)
+   set(CMAKE_REQUIRED_INCLUDES)
+   set(CMAKE_REQUIRED_DEFINITIONS)
+   set(CMAKE_REQUIRED_LIBRARIES)
+   set(CMAKE_REQUIRED_FLAGS)
+   set(CMAKE_REQUIRED_QUIET)
+
+endmacro()
+
+macro(CMAKE_PUSH_CHECK_STATE)
+
+   if(NOT DEFINED _CMAKE_PUSH_CHECK_STATE_COUNTER)
+      set(_CMAKE_PUSH_CHECK_STATE_COUNTER 0)
+   endif()
+
+   math(EXPR _CMAKE_PUSH_CHECK_STATE_COUNTER "${_CMAKE_PUSH_CHECK_STATE_COUNTER}+1")
+
+   set(_CMAKE_EXTRA_INCLUDE_FILES_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER}  ${CMAKE_EXTRA_INCLUDE_FILES})
+   set(_CMAKE_REQUIRED_INCLUDES_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER}    ${CMAKE_REQUIRED_INCLUDES})
+   set(_CMAKE_REQUIRED_DEFINITIONS_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER} ${CMAKE_REQUIRED_DEFINITIONS})
+   set(_CMAKE_REQUIRED_LIBRARIES_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER}   ${CMAKE_REQUIRED_LIBRARIES})
+   set(_CMAKE_REQUIRED_FLAGS_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER}       ${CMAKE_REQUIRED_FLAGS})
+   set(_CMAKE_REQUIRED_QUIET_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER}       ${CMAKE_REQUIRED_QUIET})
+
+   if (ARGC GREATER 0 AND ARGV0 STREQUAL "RESET")
+      cmake_reset_check_state()
+   endif()
+
+endmacro()
+
+macro(CMAKE_POP_CHECK_STATE)
+
+# don't pop more than we pushed
+   if("${_CMAKE_PUSH_CHECK_STATE_COUNTER}" GREATER "0")
+
+      set(CMAKE_EXTRA_INCLUDE_FILES  ${_CMAKE_EXTRA_INCLUDE_FILES_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER}})
+      set(CMAKE_REQUIRED_INCLUDES    ${_CMAKE_REQUIRED_INCLUDES_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER}})
+      set(CMAKE_REQUIRED_DEFINITIONS ${_CMAKE_REQUIRED_DEFINITIONS_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER}})
+      set(CMAKE_REQUIRED_LIBRARIES   ${_CMAKE_REQUIRED_LIBRARIES_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER}})
+      set(CMAKE_REQUIRED_FLAGS       ${_CMAKE_REQUIRED_FLAGS_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER}})
+      set(CMAKE_REQUIRED_QUIET       ${_CMAKE_REQUIRED_QUIET_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER}})
+
+      math(EXPR _CMAKE_PUSH_CHECK_STATE_COUNTER "${_CMAKE_PUSH_CHECK_STATE_COUNTER}-1")
+   endif()
+
+endmacro()