new stuff

assimp/contrib/draco/cmake/draco_sanitizer.cmake

@@ -0,0 +1,48 @@
+# 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_SANITIZER_CMAKE_)
+  return()
+endif() # DRACO_CMAKE_DRACO_SANITIZER_CMAKE_
+set(DRACO_CMAKE_DRACO_SANITIZER_CMAKE_ 1)
+
+# Handles the details of enabling sanitizers.
+macro(draco_configure_sanitizer)
+  if(DRACO_SANITIZE
+     AND NOT EMSCRIPTEN
+     AND NOT MSVC)
+    if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+      if(DRACO_SANITIZE MATCHES "cfi")
+        list(APPEND SAN_CXX_FLAGS "-flto" "-fno-sanitize-trap=cfi")
+        list(APPEND SAN_LINKER_FLAGS "-flto" "-fno-sanitize-trap=cfi"
+                    "-fuse-ld=gold")
+      endif()
+
+      if(${CMAKE_SIZEOF_VOID_P} EQUAL 4 AND DRACO_SANITIZE MATCHES
+                                            "integer|undefined")
+        list(APPEND SAN_LINKER_FLAGS "--rtlib=compiler-rt" "-lgcc_s")
+      endif()
+    endif()
+
+    list(APPEND SAN_CXX_FLAGS "-fsanitize=${DRACO_SANITIZE}")
+    list(APPEND SAN_LINKER_FLAGS "-fsanitize=${DRACO_SANITIZE}")
+
+    # Make sanitizer callstacks accurate.
+    list(APPEND SAN_CXX_FLAGS "-fno-omit-frame-pointer")
+    list(APPEND SAN_CXX_FLAGS "-fno-optimize-sibling-calls")
+
+    draco_test_cxx_flag(FLAG_LIST_VAR_NAMES SAN_CXX_FLAGS FLAG_REQUIRED)
+    draco_test_exe_linker_flag(FLAG_LIST_VAR_NAME SAN_LINKER_FLAGS)
+  endif()
+endmacro()