[llvm-branch-commits] [clang] [Driver] Temporarily probe aarch64-linux-gnu GCC installation (PR #102039)

[via llvm-branch-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Fangrui Song (MaskRay)

<details>
<summary>Changes</summary>

As the comment explains, `*Triples[]` lists are discouraged and not comprehensive anyway (e.g.
aarch64-unknown-linux-gnu/aarch64-unknown-linux-musl/aarch64-amazon-linux do not work).

Boost incorrectly specifies --target=arm64-pc-linux ("arm64" should not be used for Linux) and expects to probe "aarch64-linux-gnu". Add this temporary workaround for the 19.x releases.

Fix #<!-- -->101525

---
Full diff: https://github.com/llvm/llvm-project/pull/102039.diff


1 Files Affected:

- (modified) clang/lib/Driver/ToolChains/Gnu.cpp (+2-1) 


``````````diff
diff --git a/clang/lib/Driver/ToolChains/Gnu.cpp b/clang/lib/Driver/ToolChains/Gnu.cpp
index 52c2ee90b1b28..543f3965dfd4f 100644
--- a/clang/lib/Driver/ToolChains/Gnu.cpp
+++ b/clang/lib/Driver/ToolChains/Gnu.cpp
@@ -2463,7 +2463,8 @@ void Generic_GCC::GCCInstallationDetector::AddDefaultGCCPrefixes(
   // lists should shrink over time. Please don't add more elements to *Triples.
   static const char *const AArch64LibDirs[] = {"/lib64", "/lib"};
   static const char *const AArch64Triples[] = {
-      "aarch64-none-linux-gnu", "aarch64-redhat-linux", "aarch64-suse-linux"};
+      "aarch64-none-linux-gnu", "aarch64-linux-gnu", "aarch64-redhat-linux",
+      "aarch64-suse-linux"};
   static const char *const AArch64beLibDirs[] = {"/lib"};
   static const char *const AArch64beTriples[] = {"aarch64_be-none-linux-gnu"};
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/102039