Add LunaSVG

Android/android-ndk-r27d/build/ldflags_to_sanitizers.py

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+#!/usr/bin/env python3
+#
+# Copyright (C) 2018 The Android Open Source Project
+#
+# 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.
+#
+"""Determines which sanitizers should be linked based on ldflags."""
+from __future__ import print_function
+
+import sys
+from typing import TextIO
+
+
+def sanitizers_from_args(args: list[str]) -> list[str]:
+    """Returns the sanitizers enabled by a given set of ldflags."""
+    sanitizers = set()
+    for arg in args:
+        if arg.startswith("-fsanitize="):
+            sanitizer_list = arg.partition("=")[2]
+            sanitizers |= set(sanitizer_list.split(","))
+        elif arg.startswith("-fno-sanitize="):
+            sanitizer_list = arg.partition("=")[2]
+            sanitizers -= set(sanitizer_list.split(","))
+    return sorted(list(sanitizers))
+
+
+def argv_to_module_arg_lists(args: list[str]) -> tuple[list[str], list[list[str]]]:
+    """Converts module ldflags from argv format to per-module lists.
+
+    Flags are passed to us in the following format:
+        ['global flag', '--module', 'flag1', 'flag2', '--module', 'flag 3']
+
+    These should be returned as a list for the global flags and a list of
+    per-module lists, i.e.:
+        ['global flag'], [['flag1', 'flag2'], ['flag1', 'flag3']]
+    """
+    modules: list[list[str]] = [[]]
+    for arg in args:
+        if arg == "--module":
+            modules.append([])
+        else:
+            modules[-1].append(arg)
+    return modules[0], modules[1:]
+
+
+def main(argv: list[str], stream: TextIO = sys.stdout) -> None:
+    """Program entry point."""
+    # The only args we're guaranteed to see are the program name and at least
+    # one --module. GLOBAL_FLAGS might be empty, as might any of the
+    # MODULE_FLAGS sections.
+    if len(argv) < 2:
+        sys.exit(
+            "usage: ldflags_to_sanitizers.py [GLOBAL_FLAGS] "
+            "--module [MODULE_FLAGS] [--module [MODULE_FLAGS]...]"
+        )
+
+    global_flags, modules_flags = argv_to_module_arg_lists(argv[1:])
+    all_sanitizers = list(sanitizers_from_args(global_flags))
+    for module_flags in modules_flags:
+        all_sanitizers.extend(sanitizers_from_args(module_flags))
+    print(" ".join(sorted(set(all_sanitizers))), file=stream)
+
+
+if __name__ == "__main__":
+    main(sys.argv)