[clang] [lld] [lld][clang][ELF][MTE] Add generic -z memtag-* options (PR #187055)

[Florian Mayer via cfe-commits]

================
@@ -1796,16 +1796,23 @@ bool tools::addSanitizerRuntimes(const ToolChain &TC, 
const ArgList &Args,
     CmdArgs.push_back("--export-dynamic-symbol=__cfi_check");
 
   if (SanArgs.hasMemTag()) {
-    if (!TC.getTriple().isAndroid()) {
-      TC.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
-          << "-fsanitize=memtag*" << TC.getTriple().str();
-    }
+    CmdArgs.push_back("-z");
     CmdArgs.push_back(
-        Args.MakeArgString("--android-memtag-mode=" + 
SanArgs.getMemtagMode()));
-    if (SanArgs.hasMemtagHeap())
-      CmdArgs.push_back("--android-memtag-heap");
-    if (SanArgs.hasMemtagStack())
-      CmdArgs.push_back("--android-memtag-stack");
+        Args.MakeArgString("memtag-mode=" + SanArgs.getMemtagMode()));
+
+    if (SanArgs.hasMemtagHeap()) {
+      CmdArgs.push_back("-z");
+      CmdArgs.push_back("memtag-heap");
+    }
+
+    if (SanArgs.hasMemtagStack()) {
+      CmdArgs.push_back("-z");
+      CmdArgs.push_back("memtag-stack");
+    }
+
+    if (TC.getTriple().isAndroid()) {
+      CmdArgs.push_back("--android-memtag-note");
+    }
----------------
fmayer wrote:

nit: no braces for single statement

https://github.com/llvm/llvm-project/pull/187055
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