new stuff

assimp/contrib/draco/cmake/draco_variables.cmake

@@ -0,0 +1,79 @@
+# Copyright 2021 The Draco Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
+if(DRACO_CMAKE_DRACO_VARIABLES_CMAKE_)
+  return()
+endif() # DRACO_CMAKE_DRACO_VARIABLES_CMAKE_
+set(DRACO_CMAKE_DRACO_VARIABLES_CMAKE_ 1)
+
+# Halts generation when $variable_name does not refer to a directory that
+# exists.
+macro(draco_variable_must_be_directory variable_name)
+  if("${variable_name}" STREQUAL "")
+    message(
+      FATAL_ERROR
+        "Empty variable_name passed to draco_variable_must_be_directory.")
+  endif()
+
+  if("${${variable_name}}" STREQUAL "")
+    message(
+      FATAL_ERROR "Empty variable ${variable_name} is required to build draco.")
+  endif()
+
+  if(NOT IS_DIRECTORY "${${variable_name}}")
+    message(
+      FATAL_ERROR
+        "${variable_name}, which is ${${variable_name}}, does not refer to a\n"
+        "directory.")
+  endif()
+endmacro()
+
+# Adds $var_name to the tracked variables list.
+macro(draco_track_configuration_variable var_name)
+  if(DRACO_VERBOSE GREATER 2)
+    message("---- draco_track_configuration_variable ----\n"
+            "var_name=${var_name}\n"
+            "----------------------------------------------\n")
+  endif()
+
+  list(APPEND draco_configuration_variables ${var_name})
+  list(REMOVE_DUPLICATES draco_configuration_variables)
+endmacro()
+
+# Logs current C++ and executable linker flags via the CMake message command.
+macro(draco_dump_cmake_flag_variables)
+  unset(flag_variables)
+  list(APPEND flag_variables "CMAKE_CXX_FLAGS_INIT" "CMAKE_CXX_FLAGS"
+              "CMAKE_EXE_LINKER_FLAGS_INIT" "CMAKE_EXE_LINKER_FLAGS")
+  if(CMAKE_BUILD_TYPE)
+    list(
+      APPEND flag_variables
+             "CMAKE_BUILD_TYPE"
+             "CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}_INIT"
+             "CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}"
+             "CMAKE_EXE_LINKER_FLAGS_${CMAKE_BUILD_TYPE}_INIT"
+             "CMAKE_EXE_LINKER_FLAGS_${CMAKE_BUILD_TYPE}")
+  endif()
+  foreach(flag_variable ${flag_variables})
+    message("${flag_variable}:${${flag_variable}}")
+  endforeach()
+endmacro()
+
+# Dumps the variables tracked in $draco_configuration_variables via the CMake
+# message command.
+macro(draco_dump_tracked_configuration_variables)
+  foreach(config_variable ${draco_configuration_variables})
+    message("${config_variable}:${${config_variable}}")
+  endforeach()
+endmacro()