From 4fd78f9c2639921739836c08f12949e2476ca2ce Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alex=20R=C3=B8nne=20Petersen?= <alex@alexrp.com>
Date: Sun, 28 Sep 2025 08:00:56 +0200
Subject: [PATCH] libcxx: respond to some feature macro changes in LLVM 20

https://github.com/llvm/llvm-project/commit/ba87515fea90b5d55836a8e3be63a7e683ce299d

closes #25376
---
 src/libs/libcxx.zig | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/src/libs/libcxx.zig b/src/libs/libcxx.zig
index 40da4dd92f..3fc91aaa66 100644
--- a/src/libs/libcxx.zig
+++ b/src/libs/libcxx.zig
@@ -509,19 +509,19 @@ pub fn addCxxArgs(
     try cflags.append(try std.fmt.allocPrint(arena, "-D_LIBCPP_ABI_NAMESPACE=__{d}", .{
         abi_version,
     }));
-    try cflags.append(try std.fmt.allocPrint(arena, "-D_LIBCPP_HAS_{s}THREADS", .{
-        if (!comp.config.any_non_single_threaded) "NO_" else "",
+    try cflags.append(try std.fmt.allocPrint(arena, "-D_LIBCPP_HAS_THREADS={d}", .{
+        @as(u1, if (comp.config.any_non_single_threaded) 1 else 0),
     }));
     try cflags.append("-D_LIBCPP_HAS_MONOTONIC_CLOCK");
     try cflags.append("-D_LIBCPP_HAS_TERMINAL");
-    try cflags.append(try std.fmt.allocPrint(arena, "-D_LIBCPP_HAS_{s}MUSL_LIBC", .{
-        if (!target.abi.isMusl()) "NO_" else "",
+    try cflags.append(try std.fmt.allocPrint(arena, "-D_LIBCPP_HAS_MUSL_LIBC={d}", .{
+        @as(u1, if (target.abi.isMusl()) 1 else 0),
     }));
     try cflags.append("-D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS");
     try cflags.append("-D_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS");
-    try cflags.append("-D_LIBCPP_HAS_NO_VENDOR_AVAILABILITY_ANNOTATIONS");
-    try cflags.append(try std.fmt.allocPrint(arena, "-D_LIBCPP_HAS_{s}FILESYSTEM", .{
-        if (target.os.tag == .wasi) "NO_" else "",
+    try cflags.append("-D_LIBCPP_HAS_VENDOR_AVAILABILITY_ANNOTATIONS=0");
+    try cflags.append(try std.fmt.allocPrint(arena, "-D_LIBCPP_HAS_FILESYSTEM={d}", .{
+        @as(u1, if (target.os.tag == .wasi) 0 else 1),
     }));
     try cflags.append("-D_LIBCPP_HAS_RANDOM_DEVICE");
     try cflags.append("-D_LIBCPP_HAS_LOCALIZATION");
@@ -545,7 +545,7 @@ pub fn addCxxArgs(
     if (target.isGnuLibC()) {
         // glibc 2.16 introduced aligned_alloc
         if (target.os.versionRange().gnuLibCVersion().?.order(.{ .major = 2, .minor = 16, .patch = 0 }) == .lt) {
-            try cflags.append("-D_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION");
+            try cflags.append("-D_LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION=0");
         }
     }
     try cflags.append("-D_LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS");