[clang] [clang][Driver] Fix Linux/sparc64 -m32 (PR #98124)

[via cfe-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Rainer Orth (rorth)

<details>
<summary>Changes</summary>

`clang` currently fails to find a GCC installation on Linux/sparc64 with `-m32`.  `strace` reveals that `clang` tries to access `/usr/lib/gcc/sparcv9-linux-gnu` (which doesn't exist) instead of `/usr/lib/gcc/sparc64-linux-gnu`.

It turns out that 20d497c26fc95c80a1bacb38820d92e5f52bec58 was overeager in removing some of the necessary directories.

Fixed by reverting the Linux/sparc* part of the patch.

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

---
Full diff: https://github.com/llvm/llvm-project/pull/98124.diff


1 Files Affected:

- (modified) clang/lib/Driver/ToolChains/Gnu.cpp (+4-2) 


``````````diff
diff --git a/clang/lib/Driver/ToolChains/Gnu.cpp b/clang/lib/Driver/ToolChains/Gnu.cpp
index b141e5f2adfab..ff5e4022a2763 100644
--- a/clang/lib/Driver/ToolChains/Gnu.cpp
+++ b/clang/lib/Driver/ToolChains/Gnu.cpp
@@ -2563,9 +2563,11 @@ void Generic_GCC::GCCInstallationDetector::AddDefaultGCCPrefixes(
                                                "riscv64-unknown-elf"};
 
   static const char *const SPARCv8LibDirs[] = {"/lib32", "/lib"};
-  static const char *const SPARCv8Triples[] = {"sparcv8-linux-gnu"};
+  static const char *const SPARCv8Triples[] = {"sparc-linux-gnu",
+                                               "sparcv8-linux-gnu"};
   static const char *const SPARCv9LibDirs[] = {"/lib64", "/lib"};
-  static const char *const SPARCv9Triples[] = {"sparcv9-linux-gnu"};
+  static const char *const SPARCv9Triples[] = {"sparc64-linux-gnu",
+                                               "sparcv9-linux-gnu"};
 
   static const char *const SystemZLibDirs[] = {"/lib64", "/lib"};
   static const char *const SystemZTriples[] = {

``````````

</details>


https://github.com/llvm/llvm-project/pull/98124