[PATCH] D130566: [Driver] Default to DWARF 4 on Linux/sparc64

[Rainer Orth via Phabricator via cfe-commits]

ro created this revision.
ro added reviewers: glaubitz, MaskRay.
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During a build on Debian 11/sparc64, several binaries fail to link with

  /usr/bin/ld: /usr/bin/ld: DWARF error: invalid or unhandled FORM value: 0x23

`/usr/bin/ld` is `GNU ld (GNU Binutils for Debian) 2.38.50.20220707`.  `0x23 is `DW_FORM_rnglistx` which isn't handled even by GNU binutils master.  Building with `-gdwarf-4` avoids this.

Tested on `sparc64-unknown-linux-gnu`.

For comparison's sake, I've tried a build on Ubuntu 20.04/x86_64 with GNU `ld` 2.38.90, which isn't affected.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D130566

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


Index: clang/lib/Driver/ToolChains/Linux.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Linux.cpp
+++ clang/lib/Driver/ToolChains/Linux.cpp
@@ -325,7 +325,7 @@
 }
 
 unsigned Linux::GetDefaultDwarfVersion() const {
-  if (getTriple().isAndroid())
+  if (getTriple().isAndroid() || getTriple().isSPARC())
     return 4;
   return ToolChain::GetDefaultDwarfVersion();
 }


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