[libc-commits] [libc] 58d4f18 - [libc][annex_k] Add Annex K support macros. (#163100)

[via libc-commits]

Author: Muhammad Bassiouni
Date: 2025-10-22T21:25:27+03:00
New Revision: 58d4f180676776ed70f7408189f0fcd087919439

URL: https://github.com/llvm/llvm-project/commit/58d4f180676776ed70f7408189f0fcd087919439
DIFF: https://github.com/llvm/llvm-project/commit/58d4f180676776ed70f7408189f0fcd087919439.diff

LOG: [libc][annex_k] Add Annex K support macros. (#163100)

RFC https://discourse.llvm.org/t/rfc-bounds-checking-interfaces-for-llvm-libc/87685

Add internal support macros required by Annex K interface in LLVM libc.

Added: 
    libc/include/llvm-libc-macros/annex-k-macros.h

Modified: 
    libc/include/llvm-libc-macros/CMakeLists.txt

Removed: 
    


################################################################################
diff  --git a/libc/include/llvm-libc-macros/CMakeLists.txt b/libc/include/llvm-libc-macros/CMakeLists.txt
index a33ff6cabbcf5..b16337cccd58b 100644
--- a/libc/include/llvm-libc-macros/CMakeLists.txt
+++ b/libc/include/llvm-libc-macros/CMakeLists.txt
@@ -31,6 +31,12 @@ if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/${LIBC_TARGET_OS})
   add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/${LIBC_TARGET_OS})
 endif()
 
+add_macro_header(
+  annex_k_macros
+  HDR
+    annex-k-macros.h
+)
+
 add_macro_header(
   assert_macros
   HDR

diff  --git a/libc/include/llvm-libc-macros/annex-k-macros.h b/libc/include/llvm-libc-macros/annex-k-macros.h
new file mode 100644
index 0000000000000..7cfb5c1d3060b
--- /dev/null
+++ b/libc/include/llvm-libc-macros/annex-k-macros.h
@@ -0,0 +1,27 @@
+//===-- Definition of macros to be used with Annex K functions ------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_INCLUDE_LLVM_LIBC_MACROS_ANNEX_K_MACROS_H
+#define LLVM_LIBC_INCLUDE_LLVM_LIBC_MACROS_ANNEX_K_MACROS_H
+
+#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) ||              \
+    (defined(__cplusplus) && __cplusplus >= 201703L)
+
+// TODO(bassiounix): Who should def this macro (clang vs libc)? Where?
+// TODO(bassiounix): uncomment/move when Annex K is fully implemented.
+// #define __STDC_LIB_EXT1__ 201112L
+
+#if defined(__STDC_WANT_LIB_EXT1__) && __STDC_WANT_LIB_EXT1__ == 1
+
+#define LIBC_HAS_ANNEX_K
+
+#endif // defined(__STDC_WANT_LIB_EXT1__) && __STDC_WANT_LIB_EXT1__ == 1
+
+#endif // (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) ||
+       // (defined(__cplusplus) && __cplusplus >= 201703L)
+#endif // LLVM_LIBC_INCLUDE_LLVM_LIBC_MACROS_ANNEX_K_MACROS_H