diff -up chromium-131.0.6778.69/base/compiler_specific.h.me chromium-131.0.6778.69/base/compiler_specific.h
--- chromium-131.0.6778.69/base/compiler_specific.h.me	2024-11-19 20:44:12.404060581 +0100
+++ chromium-131.0.6778.69/base/compiler_specific.h	2024-11-19 20:44:54.434121935 +0100
@@ -152,7 +152,7 @@
 //     MUSTTAIL return Func1(d + 1);  // `Func1()` will be tail-called.
 //   }
 // ```
-#if __has_cpp_attribute(clang::musttail)
+#if __has_cpp_attribute(clang::musttail) && !defined(__powerpc64__)
 #define MUSTTAIL [[clang::musttail]]
 #else
 #define MUSTTAIL
diff -up chromium-131.0.6778.85/base/allocator/partition_allocator/src/partition_alloc/partition_alloc_base/compiler_specific.h.me chromium-131.0.6778.85/base/allocator/partition_allocator/src/partition_alloc/partition_alloc_base/compiler_specific.h
--- chromium-131.0.6778.85/base/allocator/partition_allocator/src/partition_alloc/partition_alloc_base/compiler_specific.h.me	2024-11-20 18:50:28.690761262 +0100
+++ chromium-131.0.6778.85/base/allocator/partition_allocator/src/partition_alloc/partition_alloc_base/compiler_specific.h	2024-11-20 18:54:49.374711202 +0100
@@ -138,7 +138,7 @@
 //     PA_MUSTTAIL return Func1(d + 1);  // `Func1()` will be tail-called.
 //   }
 // ```
-#if PA_HAS_CPP_ATTRIBUTE(clang::musttail)
+#if PA_HAS_CPP_ATTRIBUTE(clang::musttail) && !defined(__powerpc64__)
 #define PA_MUSTTAIL [[clang::musttail]]
 #else
 #define PA_MUSTTAIL