# --- T2-COPYRIGHT-BEGIN ---
# t2/package/*/wasi-libcxx/hotfix-wasi-no-copy-file-range.patch
# Copyright (C) 2026 The T2 SDE Project
# SPDX-License-Identifier: GPL-2.0 or patched project license
# --- T2-COPYRIGHT-END ---

wasi-libc is musl-derived, so _LIBCPP_HAS_MUSL_LIBC makes libc++
assume copy_file_range() is available, but WASI has no such syscall
and wasi-libc guards the declaration out. Exclude WASI so the
filesystem code falls back to the fstream copy implementation.

Signed-off-by: René Rebe <rene@exactco.de>

--- ./libcxx/src/filesystem/operations.cpp.vanilla	2026-08-30 14:38:40.000000000 +0200
+++ ./libcxx/src/filesystem/operations.cpp	2026-08-30 14:38:40.000000000 +0200
@@ -41,7 +41,7 @@
 #include <time.h>

 // since Linux 4.5 and FreeBSD 13, but the Linux libc wrapper is only provided by glibc >= 2.27 and musl
-#if _LIBCPP_GLIBC_PREREQ(2, 27) || _LIBCPP_HAS_MUSL_LIBC || defined(__FreeBSD__)
+#if (_LIBCPP_GLIBC_PREREQ(2, 27) || _LIBCPP_HAS_MUSL_LIBC || defined(__FreeBSD__)) && !defined(__wasi__)
 #  define _LIBCPP_FILESYSTEM_USE_COPY_FILE_RANGE
 #endif