[libcxx-commits] [libcxx] ba0cddb - [libc++][NFC] Remove _LIBCPP_FREESTANDING (#176907)

[via libcxx-commits]

Author: Nikolas Klauser
Date: 2026-01-29T10:13:32+01:00
New Revision: ba0cddb43ee8fa677ecb44c848dd1a1539804b60

URL: https://github.com/llvm/llvm-project/commit/ba0cddb43ee8fa677ecb44c848dd1a1539804b60
DIFF: https://github.com/llvm/llvm-project/commit/ba0cddb43ee8fa677ecb44c848dd1a1539804b60.diff

LOG: [libc++][NFC] Remove _LIBCPP_FREESTANDING (#176907)

`_LIBCPP_FREESTANDING` isn't used and it is unclear what libc++'s
strategy is going to be for implementing freestanding at the moment.
Therefore, remove the macro.

Added: 
    

Modified: 
    libcxx/include/__config
    libcxx/include/__cxx03/__config

Removed: 
    libcxx/test/libcxx-03/libcpp_freestanding.sh.cpp
    libcxx/test/libcxx/libcpp_freestanding.sh.cpp


################################################################################
diff  --git a/libcxx/include/__config b/libcxx/include/__config
index 3813e11929217..9cb98bbb59341 100644
--- a/libcxx/include/__config
+++ b/libcxx/include/__config
@@ -38,10 +38,6 @@
 #  define _LIBCPP_CONCAT(_X, _Y) _LIBCPP_CONCAT_IMPL(_X, _Y)
 #  define _LIBCPP_CONCAT3(X, Y, Z) _LIBCPP_CONCAT(X, _LIBCPP_CONCAT(Y, Z))
 
-#  if __STDC_HOSTED__ == 0
-#    define _LIBCPP_FREESTANDING
-#  endif
-
 #  define _LIBCPP_TOSTRING2(x) #x
 #  define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x)
 

diff  --git a/libcxx/include/__cxx03/__config b/libcxx/include/__cxx03/__config
index d574eab8a12b1..d955429cc4ddc 100644
--- a/libcxx/include/__cxx03/__config
+++ b/libcxx/include/__cxx03/__config
@@ -32,10 +32,6 @@
 #  define _LIBCPP_CONCAT_IMPL(_X, _Y) _X##_Y
 #  define _LIBCPP_CONCAT(_X, _Y) _LIBCPP_CONCAT_IMPL(_X, _Y)
 
-#  if __STDC_HOSTED__ == 0
-#    define _LIBCPP_FREESTANDING
-#  endif
-
 // HARDENING {
 
 // This is for backward compatibility -- make enabling `_LIBCPP_ENABLE_ASSERTIONS` (which predates hardening modes)

diff  --git a/libcxx/test/libcxx-03/libcpp_freestanding.sh.cpp b/libcxx/test/libcxx-03/libcpp_freestanding.sh.cpp
deleted file mode 100644
index 8dd7a8ac85211..0000000000000
--- a/libcxx/test/libcxx-03/libcpp_freestanding.sh.cpp
+++ /dev/null
@@ -1,20 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-
-// Test that _LIBCPP_FREESTANDING is not defined when -ffreestanding is not passed
-// to the compiler but defined when -ffreestanding is passed to the compiler.
-
-// RUN: %{cxx} %{flags} %{compile_flags} -fsyntax-only %s
-// RUN: %{cxx} %{flags} %{compile_flags} -fsyntax-only -ffreestanding -DFREESTANDING %s
-
-#include <__config>
-
-#if defined(FREESTANDING) != defined(_LIBCPP_FREESTANDING)
-#error _LIBCPP_FREESTANDING should be defined in freestanding mode and not \
-       defined in non-freestanding mode
-#endif

diff  --git a/libcxx/test/libcxx/libcpp_freestanding.sh.cpp b/libcxx/test/libcxx/libcpp_freestanding.sh.cpp
deleted file mode 100644
index 8dd7a8ac85211..0000000000000
--- a/libcxx/test/libcxx/libcpp_freestanding.sh.cpp
+++ /dev/null
@@ -1,20 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-
-// Test that _LIBCPP_FREESTANDING is not defined when -ffreestanding is not passed
-// to the compiler but defined when -ffreestanding is passed to the compiler.
-
-// RUN: %{cxx} %{flags} %{compile_flags} -fsyntax-only %s
-// RUN: %{cxx} %{flags} %{compile_flags} -fsyntax-only -ffreestanding -DFREESTANDING %s
-
-#include <__config>
-
-#if defined(FREESTANDING) != defined(_LIBCPP_FREESTANDING)
-#error _LIBCPP_FREESTANDING should be defined in freestanding mode and not \
-       defined in non-freestanding mode
-#endif