ladybird/Ports/zig/patches/0005-Add-support-for-SerenityOS.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: sin-ack <sin-ack@protonmail.com>
Date: Tue, 27 Sep 2022 00:08:46 +0000
Subject: [PATCH] Add support for SerenityOS

This commit teaches libc++ about what features are available in our
LibC, namely:
* We do not have locale support, so no-op shims should be used in place
  of the C locale API.
* The number of errno constants defined by us is given by the value of
  the `ELAST` macro.
* Multithreading is implemented though the pthread library.
* Use libc++'s builtin character type table instead of the one provided
  by LibC as there's a lot of extra porting work to convince the rest of
  locale.cpp to use our character type table properly.

This commit is an adaptation of the LLVM patch by Daniel Bertalan to fit
the layout of the zig-bootstrap project.

Co-Authored-By: Daniel Bertalan <dani@danielbertalan.dev>
---
 zig/lib/libcxx/include/__config               |  5 ++--
 zig/lib/libcxx/include/__locale               |  2 ++
 .../include/__support/serenity/xlocale.h      | 24 +++++++++++++++++++
 zig/lib/libcxx/include/locale                 |  2 +-
 zig/lib/libcxx/src/include/config_elast.h     |  2 ++
 5 files changed, 32 insertions(+), 3 deletions(-)
 create mode 100644 zig/lib/libcxx/include/__support/serenity/xlocale.h

diff --git a/zig/lib/libcxx/include/__config b/zig/lib/libcxx/include/__config
index d9a47343dad1faf52826abbcd6da7578cec9932a..74a8970eddfaec23f421c3edbe974f77ad055e27 100644
--- a/zig/lib/libcxx/include/__config
+++ b/zig/lib/libcxx/include/__config
@@ -910,7 +910,8 @@ _LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD
         defined(__sun__) ||                                                                                            \
         defined(__MVS__) ||                                                                                            \
         defined(_AIX) ||                                                                                               \
-        defined(__EMSCRIPTEN__)
+        defined(__EMSCRIPTEN__) ||                                                                                     \
+        defined(__serenity__)
 // clang-format on
 #      define _LIBCPP_HAS_THREAD_API_PTHREAD
 #    elif defined(__Fuchsia__)
@@ -988,7 +989,7 @@ _LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD
 #  endif
 
 #  if defined(__BIONIC__) || defined(__NuttX__) || defined(__Fuchsia__) || defined(__wasi__) ||                        \
-      defined(_LIBCPP_HAS_MUSL_LIBC) || defined(__OpenBSD__)
+      defined(_LIBCPP_HAS_MUSL_LIBC) || defined(__OpenBSD__) || defined(__serenity__)
 #    define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE
 #  endif
 
diff --git a/zig/lib/libcxx/include/__locale b/zig/lib/libcxx/include/__locale
index 40f9a3ff57c22635254be654227333b2a10eca6a..1c499c078b44a49abead17ce566801b4c34733f3 100644
--- a/zig/lib/libcxx/include/__locale
+++ b/zig/lib/libcxx/include/__locale
@@ -42,6 +42,8 @@
 # include <__support/musl/xlocale.h>
 #elif defined(_LIBCPP_HAS_MUSL_LIBC)
 # include <__support/musl/xlocale.h>
+#elif defined(__serenity__)
+# include <__support/serenity/xlocale.h>
 #endif
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
diff --git a/zig/lib/libcxx/include/__support/serenity/xlocale.h b/zig/lib/libcxx/include/__support/serenity/xlocale.h
new file mode 100644
index 0000000000000000000000000000000000000000..0f939d2f6989e2ad617145308d079776fe87b6ce
--- /dev/null
+++ b/zig/lib/libcxx/include/__support/serenity/xlocale.h
@@ -0,0 +1,24 @@
+//===----------------------------------------------------------------------===//
+//
+// 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 _LIBCPP_SUPPORT_SERENITY_XLOCALE_H
+#define _LIBCPP_SUPPORT_SERENITY_XLOCALE_H
+
+#if defined(__serenity__)
+
+#include <cstdlib>
+#include <clocale>
+#include <cwctype>
+#include <ctype.h>
+#include <__support/xlocale/__nop_locale_mgmt.h>
+#include <__support/xlocale/__posix_l_fallback.h>
+#include <__support/xlocale/__strtonum_fallback.h>
+
+#endif // __serenity__
+
+#endif
diff --git a/zig/lib/libcxx/include/locale b/zig/lib/libcxx/include/locale
index b01c66d0430f66ee74118e73296780bb864e920b..da29b7d00c709788facb049f417b6d5ccb5b70e1 100644
--- a/zig/lib/libcxx/include/locale
+++ b/zig/lib/libcxx/include/locale
@@ -217,7 +217,7 @@ template <class charT> class messages_byname;
 
 #if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
 // Most unix variants have catopen.  These are the specific ones that don't.
-#  if !defined(__BIONIC__) && !defined(_NEWLIB_VERSION) && !defined(__EMSCRIPTEN__)
+#  if !defined(__BIONIC__) && !defined(_NEWLIB_VERSION) && !defined(__EMSCRIPTEN__) && !defined(__serenity__)
 #    define _LIBCPP_HAS_CATOPEN 1
 #    include <nl_types.h>
 #  endif
diff --git a/zig/lib/libcxx/src/include/config_elast.h b/zig/lib/libcxx/src/include/config_elast.h
index bef26ec5019eccab758733eb85a1f8a6fc404968..fbb2899b1939a2f9ce7a39337c99e48c7749f7f2 100644
--- a/zig/lib/libcxx/src/include/config_elast.h
+++ b/zig/lib/libcxx/src/include/config_elast.h
@@ -35,6 +35,8 @@
 #define _LIBCPP_ELAST 4095
 #elif defined(__APPLE__)
 // No _LIBCPP_ELAST needed on Apple
+#elif defined(__serenity__)
+// No _LIBCPP_ELAST needed on SerenityOS
 #elif defined(__sun__)
 #define _LIBCPP_ELAST ESTALE
 #elif defined(__MVS__)