Hide the unsafe buffers pragmas if there's no unsafe buffers attribute

Clang doesn't have a way to query if a pragma exists, so assume the pragmas are present if the attribute is present, and not otherwise. This avoids -Werror=unknown-pragmas on older/system clang. [email protected] Bug: 40284755 Change-Id: I3254640c7561e5adaabbe89fdb46619dddf53ece Reviewed-on: https://chromium-review.googlesource.com/c/chromium/mini_chromium/+/5440553 Reviewed-by: Mark Mentovai <[email protected]>
CS2Us · Apr 9, 2024 · dd821d3 · dd821d3
1 parent 2eee431
commit dd821d3
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/base/compiler_specific.h b/base/compiler_specific.h
@@ -559,7 +559,7 @@ inline constexpr bool AnalyzerAssumeTrue(bool arg) {
 // explanation requires cooperation of code that is not fully encapsulated close
 // to the UNSAFE_BUFFERS() usage, it should be rejected and replaced with safer
 // coding patterns or stronger guarantees.
-#if defined(__clang__)
+#if defined(__clang__) && HAS_ATTRIBUTE(unsafe_buffer_usage)
 // clang-format off
 // Formatting is off so that we can put each _Pragma on its own line, as
 // recommended by the gcc docs.