in the 202310 branch, build using the system llvm

chromium-114-lld-argument.patch

@@ -0,0 +1,18 @@
+diff --git a/BUILD.gn b/BUILD.gn.new
+index 28c2255..7f89fe6 100644
+--- a/build/config/compiler/BUILD.gn
++++ b/build/config/compiler/BUILD.gn
+@@ -727,13 +727,6 @@ config("compiler") {
+ 
+       ldflags += [ "-Wl,-mllvm,-import-instr-limit=$import_instr_limit" ]
+ 
+-      if (!is_chromeos) {
+-        # TODO(https://crbug.com/972449): turn on for ChromeOS when that
+-        # toolchain has this flag.
+-        # We only use one version of LLVM within a build so there's no need to
+-        # upgrade debug info, which can be expensive since it runs the verifier.
+-        ldflags += [ "-Wl,-mllvm,-disable-auto-upgrade-debug-info" ]
+-      }
+     }
+ 
+     # TODO(https://crbug.com/1211155): investigate why this isn't effective on

chromium-browser-stable.spec

@@ -61,7 +61,11 @@
 
 %define xcb_version 1.14.1
 
+%if %{mdvver} == 202110
 %bcond_without alternative_llvm
+%else
+%bcond_with alternative_llvm
+%endif
 
 %if %{with alternative_llvm}
 %define llvm_ver 17
@@ -161,6 +165,10 @@ Patch655:	0005-Adjust-sizes-in-new-tab-page-for-Russian-text.patch
 Patch656:	block-requests.patch
 # From Arch Linux, fix includes
 Patch657:	angle-wayland-include-protocol.patch
+# system llvm rosa 202310
+%if %{mdvver} == 202310
+Patch658:	chromium-114-lld-argument.patch
+%endif
 
 BuildRequires:	bison
 %if %{with alternative_llvm}