[PATCH] D84482: [Fuchsia] Use -z dead-reloc-in-nonalloc=*=0 for Fuchsia targets

[Roland McGrath via Phabricator via cfe-commits]

mcgrathr created this revision.
mcgrathr added reviewers: phosek, leonardchan.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.

Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D84482

Files:
  clang/lib/Driver/ToolChains/Fuchsia.cpp


Index: clang/lib/Driver/ToolChains/Fuchsia.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Fuchsia.cpp
+++ clang/lib/Driver/ToolChains/Fuchsia.cpp
@@ -53,6 +53,13 @@
   CmdArgs.push_back("-z");
   CmdArgs.push_back("now");
 
+  // 0 is never a valid code address for Fuchsia (user or kernel), so using the
+  // traditional 0 value for references to discarded code is always fine on
+  // Fuchsia.  The new defaults of -1 and such in lld confuse some older tools
+  // for no benefit to Fuchsia.
+  CmdArgs.push_back("-z");
+  CmdArgs.push_back("dead-reloc-in-nonalloc=*=0");
+
   const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
   if (llvm::sys::path::filename(Exec).equals_lower("ld.lld") ||
       llvm::sys::path::stem(Exec).equals_lower("ld.lld")) {


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