From 598354d16cc45221c7517e18ca30b55140f54079 Mon Sep 17 00:00:00 2001
From: Boris Zbarsky <bzbarsky@apple.com>
Date: Thu, 18 Nov 2021 08:40:49 -0500
Subject: [PATCH] Add a libfuzzer config to the build system. (#11921)

---
 build/config/compiler/BUILD.gn | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
index d26edebaf3a929..81fb08caa8afdb 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -304,6 +304,9 @@ declare_args() {
   # enable undefined behavior sanitizer
   is_ubsan = false
 
+  # enable libfuzzer
+  is_libfuzzer = false
+
   # Exit on sanitize error. Generally standard libraries may get errors
   # so not stopping on the first error is often useful
   is_sanitize_fatal = true
@@ -374,7 +377,16 @@ config("sanitize_default") {
   }
 }
 
+config("libfuzzer_fuzzing") {
+  cflags = [ "-fsanitize=fuzzer" ]
+  ldflags = cflags
+}
+
 config("fuzzing_default") {
+  configs = []
+  if (is_libfuzzer) {
+    configs += [ ":libfuzzer_fuzzing" ]
+  }
 }
 
 declare_args() {