fix: preserve relibc and wayland build surfaces

local/patches/libwayland/redox.patch

@@ -1,18 +1,3 @@
---- a/src/connection.c
-+++ b/src/connection.c
-@@ -40,6 +40,12 @@
- #include <time.h>
- #include <ffi.h>
- 
-+#ifndef MSG_NOSIGNAL
-+#define MSG_NOSIGNAL 0
-+#endif
-+
-+extern FILE *open_memstream(char **bufp, size_t *sizep);
-+
- #include "wayland-util.h"
- #include "wayland-private.h"
- #include "wayland-os.h"
 --- a/src/meson.build
 +++ b/src/meson.build
 @@ -81,8 +81,7 @@

local/patches/relibc/P0-strtold-cpp-linkage-and-compat.patch

@@ -0,0 +1,106 @@
+diff --git a/include/features.h b/include/features.h
+index 6d0a0d6..d14516f 100644
+--- a/include/features.h
++++ b/include/features.h
+@@ -14,6 +14,11 @@
+ #define __RELIBC__MAJOR 0
+ #define __RELIBC__MINOR 2
+ 
++#ifndef __RELIBC_C_LONGDOUBLE_DEFINED
++#define __RELIBC_C_LONGDOUBLE_DEFINED 1
++typedef long double c_longdouble;
++#endif
++
+ /*
+  * Sources:
+  * https://en.cppreference.com/w/c/language/attributes
+diff --git a/include/stddef.h b/include/stddef.h
+index 334267f..bb58d55 100644
+--- a/include/stddef.h
++++ b/include/stddef.h
+@@ -11,6 +11,11 @@ typedef __PTRDIFF_TYPE__ ptrdiff_t;
+ 
+ typedef long unsigned int size_t;
+ 
++#ifndef __RELIBC_C_LONGDOUBLE_DEFINED
++#define __RELIBC_C_LONGDOUBLE_DEFINED 1
++typedef long double c_longdouble;
++#endif
++
+ typedef struct { long long __ll; long double __ld; } max_align_t;
+ 
+ #define offsetof(type, member) __builtin_offsetof(type, member)
+diff --git a/src/c/stdlib.c b/src/c/stdlib.c
+index 62e9810..4040655 100644
+--- a/src/c/stdlib.c
++++ b/src/c/stdlib.c
+@@ -1,9 +1,5 @@
+ double strtod(const char *nptr, char **endptr);
+ 
+-long double strtold(const char *nptr, char **endptr) {
+-    return (long double)strtod(nptr, endptr);
+-}
+-
+ double relibc_ldtod(const long double* val) {
+     return (double)(*val);
+ }
+diff --git a/src/header/stdlib/cbindgen.toml b/src/header/stdlib/cbindgen.toml
+index c105da5..d5bcb23 100644
+--- a/src/header/stdlib/cbindgen.toml
++++ b/src/header/stdlib/cbindgen.toml
+@@ -1,21 +1,5 @@
+ sys_includes = ["stddef.h", "alloca.h", "wchar.h", "features.h"]
+ include_guard = "_RELIBC_STDLIB_H"
+-trailer = """
+-#ifndef _RELIBC_STDLIB_EXTRA_H
+-#define _RELIBC_STDLIB_EXTRA_H
+-
+-#ifdef __cplusplus
+-extern "C" {
+-#endif
+-
+-long double strtold(const char *nptr, char **endptr);
+-
+-#ifdef __cplusplus
+-}
+-#endif
+-
+-#endif
+-"""
+ language = "C"
+ style = "Type"
+ no_includes = true
+diff --git a/src/header/stdlib/mod.rs b/src/header/stdlib/mod.rs
+index 423ee95..43bc912 100644
+--- a/src/header/stdlib/mod.rs
++++ b/src/header/stdlib/mod.rs
+@@ -31,7 +31,7 @@ use crate::{
+     platform::{
+         self, Pal, Sys,
+         types::{
+-            c_char, c_double, c_float, c_int, c_long, c_longlong, c_uint, c_ulong, c_ulonglong,
++            c_char, c_double, c_float, c_int, c_long, c_longdouble, c_longlong, c_uint, c_ulong, c_ulonglong,
+             c_ushort, c_void, size_t, ssize_t, uintptr_t, wchar_t,
+         },
+     },
+@@ -1490,12 +1494,19 @@ pub unsafe extern "C" fn strtod(s: *const c_char, endptr: *mut *mut c_char) -> c
+     strto_float_impl!(c_double, s, endptr)
+ }
+ 
+-/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/strtod.html>.
++/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/strtof.html>.
+ #[unsafe(no_mangle)]
+ pub unsafe extern "C" fn strtof(s: *const c_char, endptr: *mut *mut c_char) -> c_float {
+     strto_float_impl!(c_float, s, endptr)
+ }
+ 
++/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/strtod.html>.
++#[unsafe(no_mangle)]
++pub unsafe extern "C" fn strtold(s: *const c_char, endptr: *mut *mut c_char) -> c_longdouble {
++    let result = unsafe { strtod(s, core::ptr::null_mut()) };
++    result as c_longdouble
++}
++
+ /// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/strtol.html>.
+ #[unsafe(no_mangle)]
+ pub unsafe extern "C" fn strtol(s: *const c_char, endptr: *mut *mut c_char, base: c_int) -> c_long {

local/patches/relibc/P3-threads.patch

@@ -26,7 +26,7 @@ new file mode 100644
 index 0000000..9ab9496
 --- /dev/null
 +++ b/src/header/threads/mod.rs
-@@ -0,0 +1,31 @@
+@@ -0,0 +1,36 @@
 +//! `threads.h` implementation — C11 threads type definitions and constants.
 +//!
 +//! Full C11 threads API (thrd_create, mtx_lock, cnd_wait, etc.) requires
@@ -58,3 +58,8 @@ index 0000000..9ab9496
 +
 +#[unsafe(no_mangle)]
 +pub unsafe extern "C" fn thrd_yield() {}
++
++#[unsafe(no_mangle)]
++pub unsafe extern "C" fn thrd_exit(_ret: *mut c_int) -> ! {
++    loop {}
++}

recipes/wip/wayland/libwayland/recipe.toml

@@ -1,6 +1,6 @@
-#TODO: Requires Redox compatibility patching for missing Linux header paths and
+#TODO: Requires a narrow Redox delta for native scanner discovery during
-# some POSIX/Linux-only flags during cross-builds.
+# cross-builds and a userspace eventfd fallback because relibc lacks sys/eventfd.h.
-# redox.patch restores the Redox compatibility stubs plus Meson scanner detection.
+# redox.patch keeps only the active scanner/eventfd compatibility surface.
 [source]
 tar = "https://gitlab.freedesktop.org/wayland/wayland/-/releases/1.24.0/downloads/wayland-1.24.0.tar.xz"
 patches = ["redox.patch"]
@@ -26,7 +26,12 @@ COOKBOOK_MESON_FLAGS=(
     -Ddefault_library=static
     -Dprefix=/usr
 )
-cookbook_meson -Ddocumentation=false -Dtests=false -Ddtd_validation=false -Dscanner=false -Dc_args=-Wno-error
+cookbook_meson \
+    -Ddocumentation=false \
+    -Dtests=false \
+    -Ddtd_validation=false \
+    -Dscanner=false \
+    -Dc_args="['-I${COOKBOOK_SYSROOT}/include','-Wno-error']"
 
 for pc in "${COOKBOOK_STAGE}/usr/lib/pkgconfig/wayland-client.pc" "${COOKBOOK_STAGE}/usr/lib/pkgconfig/wayland-server.pc"; do
     if [ -f "$pc" ]; then