From 3ad39e9878310e5317ee73c9b353c1e2c1c5c4ee Mon Sep 17 00:00:00 2001
From: Richard Qin <richard.qin.x@gmail.com>
Date: Sat, 11 Jul 2026 22:48:30 +0800
Subject: lib: establish Zircon libc++ and KTL foundation

---
 lib/ktl/include/cstdlib | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 lib/ktl/include/cstdlib

(limited to 'lib/ktl/include/cstdlib')

diff --git a/lib/ktl/include/cstdlib b/lib/ktl/include/cstdlib
new file mode 100644
index 0000000..25ad762
--- /dev/null
+++ b/lib/ktl/include/cstdlib
@@ -0,0 +1,30 @@
+// Copyright 2018 The Fuchsia Authors
+//
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file or at
+// https://opensource.org/licenses/MIT
+
+#pragma once
+
+// This is used by libc++'s <new> just for std::abort, ::posix_memalign, and
+// ::free.
+
+#include <stdlib.h>
+
+#include <__config>
+
+#define _LIBCPP_UNREACHABLE() __builtin_unreachable()
+
+// This is used by the __libcpp_aligned_alloc inline.  Since it always fails
+// that inline will trivially always return nullptr.
+inline int posix_memalign(void** ptr, size_t align, size_t size) { return 1; }
+
+// This is used by the __libcpp_aligned_free inline, which won't really ever be
+// called.  The kernel does have a real free declared elsewhere.
+void free(void* ptr);
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+using ::abort;
+
+_LIBCPP_END_NAMESPACE_STD
-- 
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