--- build/config/compiler/BUILD.gn	2025-09-01 12:23:07
+++ build/config/compiler/BUILD.gn	2025-10-20 22:46:15
@@ -2221,7 +2221,7 @@
   }
 
   # TODO(crbug.com/355446806): Clean up and enable.
-  if (is_apple) {
+  if (false) {
     ldflags += [ "-Wl,-no_warn_duplicate_libraries" ]
   }
 
--- build/toolchain/apple/toolchain.gni	2026-05-29 13:02:36
+++ build/toolchain/apple/toolchain.gni	2026-07-18 12:41:56
@@ -200,6 +200,10 @@
     cc = compiler_prefix + _cc
     cxx = compiler_prefix + _cxx
     ld = _cxx
+
+    cc = getenv("CC")
+    cxx = getenv("CXX")
+    ld = cxx
 
     # Set the explicit search path for clang++ so it uses the right linker
     # binary.
@@ -230,11 +234,14 @@
     linker_driver_env = "TOOL_VERSION=${tool_versions.linker_driver}"
     linker_driver =
         rebase_path("//build/toolchain/apple/linker_driver.py", root_build_dir)
+    linker_driver = "$python_path $linker_driver"
     linker_driver_args = "-Wcrl,driver,$ld"
 
     # Specify an explicit path for the strip binary.
     _strippath = "${prefix}llvm-strip"
     _installnametoolpath = "${prefix}llvm-install-name-tool"
+    _strippath = "strip"
+    _installnametoolpath = "install_name_tool"
     linker_driver_args += " -Wcrl,strippath,${_strippath} -Wcrl,installnametoolpath,${_installnametoolpath}"
     _enable_dsyms = enable_dsyms
     _save_unstripped_output = save_unstripped_output
@@ -252,8 +259,7 @@
     if (_enable_dsyms) {
       dsym_switch = " -Wcrl,dsym,{{root_out_dir}} "
       dsym_switch += "-Wcrl,dsymutilpath," +
-                     rebase_path("//tools/clang/dsymutil/bin/dsymutil",
-                                 root_build_dir) + " "
+                     "dsymutil" + " "
 
       # All the toolchains are defined in the context of the default toolchain,
       # this means that the global variable `current_cpu` is not correct, it
@@ -581,7 +587,7 @@
 
     tool("alink") {
       rspfile = "{{output}}.rsp"
-      rspfile_content = "{{inputs}}"
+      rspfile_content = "{{inputs_newline}}"
 
       if (!toolchain_uses_lld) {
         script = rebase_path("//build/toolchain/apple/filter_libtool.py",
@@ -593,7 +599,7 @@
         # Apple's libtool fails if the response file is empty (e.g., for empty
         # targets). We work around this by writing a dummy archive with the ar
         # magic number.
-        command = "rm -f {{output}} && if [ -s \"$rspfile\" ]; then TOOL_VERSION=${tool_versions.filter_libtool} $python_path $script $libtool -static -D {{arflags}} -o {{output}} @$rspfile; else printf '!<arch>\n' > {{output}}; fi"
+        command = "rm -f {{output}} && if [ -s \"$rspfile\" ]; then TOOL_VERSION=${tool_versions.filter_libtool} $python_path $script $libtool -static {{arflags}} -o {{output}} -filelist $rspfile; else printf '!<arch>\n' > {{output}}; fi"
         description = "LIBTOOL-STATIC {{output}}"
       } else {
         ar = "${prefix}llvm-ar"
@@ -632,6 +638,8 @@
       # appropriate binary if there are multiple installs.
       nm = "${prefix}llvm-nm"
       otool = "${prefix}llvm-otool"
+      nm = "nm"
+      otool = "otool"
 
       link_command = "$linker_driver_env $linker_driver"
       link_command += " -Wcrl,otoolpath,$otool -Wcrl,nmpath,$nm"
--- build/toolchain/apple/linker_driver.py	2026-08-15 17:35:18
+++ build/toolchain/apple/linker_driver.py	2026-08-15 17:38:59
@@ -360,13 +360,6 @@
         dsymutil_env['PATH'] = ':'.join(tools_paths)
         subprocess.check_call(
             self._dsymutil_cmd + [
-                # TODO(crbug.com/532150826): Switch to `--linker parallel` when
-                # we figure out how to prevent memory/thread explosion.
-                '--linker=classic',
-                # TODO(crbug.com/513203450): Until we figure out what to do
-                # with > 4GB DWARF data, pass this flag to suppress the
-                # warning
-                '--allow-section-header-offset-overflow',
                 '-o',
                 dsym_out,
                 linker_output,