Squashed 'third_party/utf8_range/' changes from 72c943dea..d863bc33e

d863bc33e cleanup: avoid "unused function" errors in OSS land
f4948c4f2 internal change
cd1507d14 Fix typo in pkg-config file to properly link the utf8_range libraries
3f179d134 Add pkg-config file declaring Abseil dependency of utf8_range

git-subtree-dir: third_party/utf8_range
git-subtree-split: d863bc33e15cba6d873c878dcca9e6fe52b2f8cb

.github/workflows/bazel_tests.yml

@@ -29,8 +29,15 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
+      - name: Setup Bazel
+        run: |
+          echo "BAZEL=bazel" >> $GITHUB_ENV
+          echo "USE_BAZEL_VERSION=5.1.1" >> $GITHUB_ENV
+      - name: Setup Bazel (macOS)
+        if: runner.os == 'macOS'
+        run: echo "BAZEL=bazelisk" >> $GITHUB_ENV
       - name: Install dependencies
         run: sudo apt update && sudo apt install -y ${{ matrix.install }}
         if: matrix.install != ''
       - name: Run tests
-        run: cd ${{ github.workspace }} && CC=${{ matrix.CC }} bazel test --test_output=errors ... ${{ matrix.flags }}
+        run: cd ${{ github.workspace }} && CC=${{ matrix.CC }} ${{ env.BAZEL }} test --test_output=errors ... ${{ matrix.flags }}

BUILD.bazel

@@ -4,6 +4,12 @@
 # license that can be found in the LICENSE file or at
 # https://opensource.org/licenses/MIT.
 
+DEFAULT_VISIBILITY = [
+    "//third_party/protobuf:__subpackages__",
+    "//:__subpackages__",
+    "//util/utf8/internal:__subpackages__",
+]
+
 package(default_visibility = ["//visibility:public"])
 
 licenses(["notice"])

CMakeLists.txt

@@ -73,6 +73,11 @@ if (utf8_range_ENABLE_INSTALL)
   install(FILES "${PROJECT_BINARY_DIR}/${PROJECT_NAME}-config.cmake"
     DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
   )
+  configure_file(${CMAKE_CURRENT_SOURCE_DIR}/cmake/utf8_range.pc.cmake
+                 ${CMAKE_CURRENT_BINARY_DIR}/utf8_range.pc @ONLY)
+  install(
+    FILES ${CMAKE_CURRENT_BINARY_DIR}/utf8_range.pc
+    DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
 
   # Install public headers explicitly.
   install(FILES utf8_range.h utf8_validity.h

cmake/utf8_range.pc.cmake

@@ -0,0 +1,11 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=@CMAKE_INSTALL_PREFIX@
+libdir=@CMAKE_INSTALL_FULL_LIBDIR@
+includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@
+
+Name: UTF8 Range
+Description: Google's UTF8 Library
+Version: 1.0
+Requires: absl_strings
+Libs: -L${libdir} -lutf8_validity -lutf8_range @CMAKE_THREAD_LIBS_INIT@
+Cflags: -I${includedir}

utf8_validity.cc

@@ -133,6 +133,7 @@ size_t ValidUTF8Span(const char* data, const char* end) {
   return err_pos + (1 - ReturnPosition);
 }
 
+#ifdef __SSE4_1__
 /* Returns the number of bytes needed to skip backwards to get to the first
    byte of codepoint.
  */
@@ -148,6 +149,7 @@ inline int CodepointSkipBackwards(int32_t codepoint_word) {
   }
   return 0;
 }
+#endif  // __SSE4_1__
 
 /* Skipping over ASCII as much as possible, per 8 bytes. It is intentional
    as most strings to check for validity consist only of 1 byte codepoints.