[clang] Add -static-libasan alias for -static-libsan. (PR #98194)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Evgenii Stepanov (eugenis)

<details>
<summary>Changes</summary>

This helps compatibility with gcc, which has (static|shared)-libasan, but not *-libsan.

Clang currently has
  -shared-libasan
  -shared-libsan
  -static-libsan

This change improves consistency by adding
  -static-libasan

---
Full diff: https://github.com/llvm/llvm-project/pull/98194.diff


2 Files Affected:

- (modified) clang/include/clang/Driver/Options.td (+1) 
- (modified) clang/test/Driver/sanitizer-ld.c (+7) 


``````````diff
diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index be7c3b60c20f1..93292a35841c4 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -1618,6 +1618,7 @@ def shared_libsan : Flag<["-"], "shared-libsan">,
 def static_libsan : Flag<["-"], "static-libsan">,
   HelpText<"Statically link the sanitizer runtime (Not supported for ASan, TSan or UBSan on darwin)">;
 def : Flag<["-"], "shared-libasan">, Alias<shared_libsan>;
+def : Flag<["-"], "static-libasan">, Alias<static_libsan>;
 def fasm : Flag<["-"], "fasm">, Group<f_Group>;
 
 defm assume_unique_vtables : BoolFOption<"assume-unique-vtables",
diff --git a/clang/test/Driver/sanitizer-ld.c b/clang/test/Driver/sanitizer-ld.c
index 93702f456229f..e215c034070e0 100644
--- a/clang/test/Driver/sanitizer-ld.c
+++ b/clang/test/Driver/sanitizer-ld.c
@@ -196,6 +196,13 @@
 // RUN:     -static-libsan \
 // RUN:   | FileCheck --check-prefix=CHECK-ASAN-ANDROID-STATICLIBASAN %s
 //
+// RUN: %clang -### %s 2>&1 \
+// RUN:     --target=arm-linux-androideabi -fuse-ld=ld -fsanitize=address \
+// RUN:     --sysroot=%S/Inputs/basic_android_tree/sysroot \
+// RUN:     -resource-dir=%S/Inputs/resource_dir \
+// RUN:     -static-libasan \
+// RUN:   | FileCheck --check-prefix=CHECK-ASAN-ANDROID-STATICLIBASAN %s
+//
 // CHECK-ASAN-ANDROID-STATICLIBASAN: "{{(.*[^.0-9A-Z_a-z])?}}ld.lld{{(.exe)?}}"
 // CHECK-ASAN-ANDROID-STATICLIBASAN: libclang_rt.asan.a"
 // CHECK-ASAN-ANDROID-STATICLIBASAN-NOT: "-lpthread"

``````````

</details>


https://github.com/llvm/llvm-project/pull/98194