From 45f274deacdc195b5ed3c4b837f16ff2c6a7a77b Mon Sep 17 00:00:00 2001
From: Tyler Yankee <tyler.yankee@kitware.com>
Date: Fri, 27 Feb 2026 09:30:58 -0500
Subject: [PATCH] Add LSan feature to UNIX toolchain

Mirror the existing sanitizer features with the appropriate leak
sanitizer flags.
---
 cc/private/toolchain/unix_cc_toolchain_config.bzl | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/cc/private/toolchain/unix_cc_toolchain_config.bzl b/cc/private/toolchain/unix_cc_toolchain_config.bzl
index 86480f8d8..6815e9f16 100644
--- a/cc/private/toolchain/unix_cc_toolchain_config.bzl
+++ b/cc/private/toolchain/unix_cc_toolchain_config.bzl
@@ -1690,6 +1690,17 @@ def _impl(ctx):
         ],
     )
 
+    lsan_feature = _sanitizer_feature(
+        name = "lsan",
+        specific_compile_flags = [
+            "-fsanitize=leak",
+            "-fno-common",
+        ],
+        specific_link_flags = [
+            "-fsanitize=leak",
+        ],
+    )
+
     tsan_feature = _sanitizer_feature(
         name = "tsan",
         specific_compile_flags = [
@@ -1839,6 +1850,7 @@ def _impl(ctx):
             supports_pic_feature,
             prefer_pic_for_opt_binaries_feature,
             asan_feature,
+            lsan_feature,
             tsan_feature,
             ubsan_feature,
             gcc_quoting_for_param_files_feature,
@@ -1891,6 +1903,7 @@ def _impl(ctx):
             libtool_feature,
             archiver_flags_feature,
             asan_feature,
+            lsan_feature,
             tsan_feature,
             ubsan_feature,
             gcc_quoting_for_param_files_feature,