chore: import upstream snapshot with attribution

2026-07-13 12:25:07 +08:00
commit a26e856398
1681 changed files with 296950 additions and 0 deletions
@@ -0,0 +1,70 @@
+cmake_minimum_required(VERSION 3.7.2)
+
+# Copyright 2017 gRPC 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.
+
+find_package(re2 QUIET CONFIG)
+if(re2_FOUND)
+  message(STATUS "Found RE2 via CMake.")
+  return()
+endif()
+
+# As per https://github.com/grpc/grpc/issues/25434, idempotence is necessary
+# because CMake fails when another target with the same name already exists.
+if(TARGET re2::re2)
+  message(STATUS "Found RE2 via pkg-config already?")
+  return()
+endif()
+
+find_package(PkgConfig QUIET)
+if (PKG_CONFIG_FOUND)
+  # TODO(junyer): Use the IMPORTED_TARGET option whenever CMake 3.6 (or newer)
+  # becomes the minimum required: that will take care of the add_library() and
+  # set_property() calls; then we can simply alias PkgConfig::RE2 as re2::re2.
+  # For now, we can only set INTERFACE_* properties that existed in CMake 3.5.
+  pkg_check_modules(RE2 QUIET re2)
+endif()
+
+if(RE2_FOUND)
+  set(re2_FOUND true)
+  add_library(re2::re2 INTERFACE IMPORTED)
+  if(RE2_INCLUDE_DIRS)
+    set_property(TARGET re2::re2 PROPERTY
+                 INTERFACE_INCLUDE_DIRECTORIES "${RE2_INCLUDE_DIRS}")
+  endif()
+  if(RE2_CFLAGS_OTHER)
+    # Filter out the -std flag, which is handled by CMAKE_CXX_STANDARD.
+    # TODO(junyer): Use the FILTER option whenever CMake 3.6 (or newer)
+    # becomes the minimum required: that will allow this to be concise.
+    foreach(flag IN LISTS RE2_CFLAGS_OTHER)
+      if("${flag}" MATCHES "^-std=")
+        list(REMOVE_ITEM RE2_CFLAGS_OTHER "${flag}")
+      endif()
+    endforeach()
+    set_property(TARGET re2::re2 PROPERTY
+                 INTERFACE_COMPILE_OPTIONS "${RE2_CFLAGS_OTHER}")
+  endif()
+
+  if(RE2_LDFLAGS)
+    set_property(TARGET re2::re2 PROPERTY
+                 INTERFACE_LINK_LIBRARIES "${RE2_LDFLAGS}")
+  endif()
+
+  message(STATUS "Found RE2 via pkg-config.")
+  return()
+endif()
+
+if(re2_FIND_REQUIRED)
+  message(WARNING "Failed to find RE2.")
+endif()