-- Avoid GN "Assignment had no effect" errors for `c_additional_outputs`
-- values that are set but not consumed by this FreeBSD build.
-- Also remove Clang flags that are not supported by the Clang version used for
-- this FreeBSD port (-fdiagnostics-show-inlining-chain and -fno-lifetime-dse).
--- build/config/compiler/BUILD.gn.orig	2026-09-24 10:29:01 UTC
+++ build/config/compiler/BUILD.gn
@@ -588,14 +588,6 @@ config("compiler") {
   if (is_clang) {
     # Flags for diagnostics.
     cflags += [ "-fcolor-diagnostics" ]
-    if (!is_wasm) {
-      if (!is_win) {
-        cflags += [ "-fdiagnostics-show-inlining-chain" ]
-      } else {
-        # Combine after https://github.com/llvm/llvm-project/pull/192241
-        cflags += [ "/clang:-fdiagnostics-show-inlining-chain" ]
-      }
-    }
     if (diagnostics_print_source_range_info && !is_win) {
       cflags += [ "-fdiagnostics-print-source-range-info" ]
     }
@@ -626,13 +618,6 @@ config("compiler") {
       ]
     }
 
-    # The performance improvement does not seem worth the risk. See
-    # https://crbug.com/484082200 for background and https://crrev.com/c/7593035
-    # for discussion.
-    if (!is_wasm) {
-      cflags += [ "-fno-lifetime-dse" ]
-    }
-
     # TODO(hans): Remove this once Clang generates better optimized debug info
     # by default. https://crbug.com/765793
     cflags += [
@@ -910,8 +895,6 @@ config("compiler") {
   if (compiler_timing) {
     if (is_clang) {
       cflags += [ "-ftime-trace" ]
-      c_additional_outputs =
-          [ "{{target_out_dir}}/{{label_name}}/{{source_name_part}}.json" ]
       if (use_lld && is_mac) {
         ldflags += [ "-Wl,--time-trace" ]
       }
@@ -2868,10 +2851,6 @@ config("split_dwarf") {
   # thinlto requires -gsplit-dwarf in ldflags.
   if (use_thin_lto && !is_apple) {
     ldflags = split_dwarf_flags
-  } else {
-    # .dwo files are generated when ThinLTO is not used.
-    c_additional_outputs =
-        [ "{{target_out_dir}}/{{label_name}}/{{source_name_part}}.dwo" ]
   }
 }