initial commit-moved from vulkan_guide

third_party/SDL/cmake/macros.cmake

@@ -0,0 +1,126 @@
+macro(ADD_TO_ALLOPTIONS _NEWNAME)
+  list(APPEND ALLOPTIONS ${_NEWNAME})
+  string(LENGTH ${_NEWNAME} _SLEN)
+  if(${LONGESTOPTIONNAME} LESS ${_SLEN})
+    set(LONGESTOPTIONNAME ${_SLEN})
+  endif()
+endmacro()
+
+macro(SET_OPTION _NAME _DESC)
+  add_to_alloptions(${_NAME})
+  if(${ARGC} EQUAL 3)
+    set(_DEFLT ${ARGV2})
+  else()
+    set(_DEFLT OFF)
+  endif()
+  option(${_NAME} ${_DESC} ${_DEFLT})
+endmacro()
+
+macro(DEP_OPTION _NAME _DESC _DEFLT _DEPTEST _FAILDFLT)
+  add_to_alloptions("${_NAME}")
+  cmake_dependent_option("${_NAME}" "${_DESC}" "${_DEFLT}" "${_DEPTEST}" "${_FAILDFLT}")
+endmacro()
+
+macro(OPTION_STRING _NAME _DESC _VALUE)
+  add_to_alloptions(${_NAME})
+  set(${_NAME} ${_VALUE} CACHE STRING "${_DESC}")
+  set(HAVE_${_NAME} ${_VALUE})
+ENDMACRO()
+
+# Message Output
+macro(MESSAGE_WARN _TEXT)
+  message(WARNING "${_TEXT}")
+endmacro()
+
+macro(MESSAGE_ERROR _TEXT)
+  message(FATAL_ERROR "*** ERROR: ${_TEXT}")
+endmacro()
+
+macro(MESSAGE_BOOL_OPTION _NAME _VALUE)
+  if(${_VALUE})
+    message(STATUS "  ${_NAME}:\tON")
+  else()
+    message(STATUS "  ${_NAME}:\tOFF")
+  endif()
+endmacro()
+
+macro(MESSAGE_TESTED_OPTION _NAME)
+  set(_REQVALUE ${${_NAME}})
+  set(_PAD " ")
+  if(${ARGC} EQUAL 2)
+    set(_PAD ${ARGV1})
+  endif()
+  string(SUBSTRING "${_NAME}" 0 4 _NAMESTART)
+  if(_NAMESTART STREQUAL "SDL_")
+    string(SUBSTRING "${_NAME}" 4 -1 _STRIPPEDNAME)
+  else()
+    set(_STRIPPEDNAME "${_NAME}")
+  endif()
+  if(NOT HAVE_${_STRIPPEDNAME})
+    set(HAVE_${_STRIPPEDNAME} OFF)
+  elseif("${HAVE_${_STRIPPEDNAME}}" MATCHES "1|TRUE|YES|Y")
+    set(HAVE_${_STRIPPEDNAME} ON)
+  endif()
+  message(STATUS "  ${_NAME}${_PAD}(Wanted: ${_REQVALUE}): ${HAVE_${_STRIPPEDNAME}}")
+endmacro()
+
+function(LISTTOSTR _LIST _OUTPUT)
+  if(${ARGC} EQUAL 3)
+    # prefix for each element
+    set(_LPREFIX ${ARGV2})
+  else()
+    set(_LPREFIX "")
+  endif()
+  # Do not use string(REPLACE ";" " ") here to avoid messing up list
+  # entries
+  set(res)
+  foreach(_ITEM ${${_LIST}})
+    set(res "${res} ${_LPREFIX}${_ITEM}")
+  endforeach()
+  set(${_OUTPUT} "${res}" PARENT_SCOPE)
+endfunction()
+
+macro(LISTTOSTRREV _LIST _OUTPUT)
+  if(${ARGC} EQUAL 3)
+    # prefix for each element
+    set(_LPREFIX ${ARGV2})
+  else()
+    set(_LPREFIX "")
+  endif()
+  # Do not use string(REPLACE ";" " ") here to avoid messing up list
+  # entries
+  foreach(_ITEM ${${_LIST}})
+    set(${_OUTPUT} "${_LPREFIX}${_ITEM} ${${_OUTPUT}}")
+  endforeach()
+endmacro()
+
+if(CMAKE_VERSION VERSION_LESS 3.16.0 OR SDL2_SUBPROJECT)
+  # - CMake versions <3.16 do not support the OBJC language
+  # - When SDL is built as a subproject and when the main project does not enable OBJC,
+  #   CMake fails due to missing internal CMake variables (CMAKE_OBJC_COMPILE_OBJECT)
+  #   (reproduced with CMake 3.24.2)
+  macro(CHECK_OBJC_SOURCE_COMPILES SOURCE VAR)
+    set(PREV_REQUIRED_DEFS "${CMAKE_REQUIRED_DEFINITIONS}")
+    set(CMAKE_REQUIRED_DEFINITIONS "-x objective-c ${PREV_REQUIRED_DEFS}")
+    CHECK_C_SOURCE_COMPILES("${SOURCE}" ${VAR})
+    set(CMAKE_REQUIRED_DEFINITIONS "${PREV_REQUIRED_DEFS}")
+  endmacro()
+else()
+  include(CheckOBJCSourceCompiles)
+  if (APPLE)
+      enable_language(OBJC)
+  endif()
+endif()
+
+if(APPLE)
+  check_language(OBJC)
+  if(NOT CMAKE_OBJC_COMPILER)
+    message(WARNING "Cannot find working OBJC compiler.")
+  endif()
+endif()
+
+if(CMAKE_VERSION VERSION_LESS 3.13.0)
+  macro(target_link_directories _TARGET _SCOPE)
+    link_directories(${ARGN})
+  endmacro()
+endif()