--- patch103/base/compiler_specific.h	2022-06-08 18:02:54.000000000 +0200
+++ patch103/base/compiler_specific.h.fix-build-clang11-nomerge	2022-06-16 11:11:06.318888678 +0200
@@ -329,7 +329,8 @@ inline constexpr bool AnalyzerAssumeTrue
 #endif  // defined(__clang_analyzer__)
 
 // Use nomerge attribute to disable optimization of merging multiple same calls.
-#if defined(__clang__) && HAS_ATTRIBUTE(nomerge)
+#if defined(__clang__) && (__clang_major__ >= 12) && \
+    __has_attribute(nomerge) && !defined(OS_CHROMEOS)
 #define NOMERGE [[clang::nomerge]]
 #else
 #define NOMERGE
--- patch104/base/allocator/partition_allocator/partition_alloc_base/compiler_specific.h	2022-07-20 20:45:48.000000000 +0200
+++ patch104/base/allocator/partition_allocator/partition_alloc_base/compiler_specific.h-nomerge	2022-07-28 10:43:52.420346483 +0200
@@ -314,7 +314,7 @@ inline constexpr bool AnalyzerAssumeTrue
 #endif  // defined(__clang_analyzer__)
 
 // Use nomerge attribute to disable optimization of merging multiple same calls.
-#if defined(__clang__) && PA_HAS_ATTRIBUTE(nomerge)
+#if defined(__clang__) && PA_HAS_ATTRIBUTE(nomerge) && (__clang_major__ >= 12)
 #define PA_NOMERGE [[clang::nomerge]]
 #else
 #define PA_NOMERGE
--- patch/base/check.h	2022-08-24 22:27:56.000000000 +0200
+++ patch/base/check.h.fix-build-clang11-nomerge	2022-08-28 10:17:58.836057058 +0200
@@ -87,7 +87,7 @@ class BASE_EXPORT CheckError {
   // Stream for adding optional details to the error message.
   std::ostream& stream();
 
-  NOMERGE ~CheckError();
+  ~CheckError();
 
   CheckError(const CheckError&) = delete;
   CheckError& operator=(const CheckError&) = delete;