diff -r b60487c3ec36 -r af685cc9d623 ucx/cx/common.h
--- a/ucx/cx/common.h	Sun Aug 31 14:39:13 2025 +0200
+++ b/ucx/cx/common.h	Sat Nov 08 23:06:11 2025 +0100
@@ -46,10 +46,10 @@
  * Repositories:<br>
  * <a href="https://sourceforge.net/p/ucx/code">https://sourceforge.net/p/ucx/code</a>
  * -&nbsp;or&nbsp;-
- * <a href="https://develop.uap-core.de/hg/ucx">https://develop.uap-core.de/hg/ucx</a>
+ * <a href="https://uap-core.de/hg/ucx">https://uap-core.de/hg/ucx</a>
  * </p>
  *
- * <h2>LICENCE</h2>
+ * <h2>LICENSE</h2>
  *
  * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
  *
@@ -131,6 +131,11 @@
 #endif
 
 /**
+ * Inform the compiler that falling through a switch case is intentional.
+ */
+#define cx_attr_fallthrough __attribute__((__fallthrough__))
+
+/**
  * All pointer arguments must be non-NULL.
  */
 #define cx_attr_nonnull __attribute__((__nonnull__))
@@ -150,7 +155,7 @@
  */
 #define cx_attr_malloc __attribute__((__malloc__))
 
-#ifndef __clang__
+#if !defined(__clang__) && __GNUC__ >= 11
 /**
  * The pointer returned by the attributed function is supposed to be freed
  * by @p freefunc.
@@ -184,7 +189,7 @@
  */
 #define cx_attr_cstr_arg(idx)
 /**
- * No support for access attribute in clang.
+ * No support for the access attribute in clang.
  */
 #define cx_attr_access(mode, ...)
 #else
@@ -240,20 +245,6 @@
  */
 #define cx_attr_access_w(...) cx_attr_access(__write_only__, __VA_ARGS__)
 
-#if __STDC_VERSION__ >= 202300L
-
-/**
- * Do not warn about unused variable.
- */
-#define cx_attr_unused [[maybe_unused]]
-
-/**
- * Warn about discarded return value.
- */
-#define cx_attr_nodiscard [[nodiscard]]
-
-#else // no C23
-
 /**
  * Do not warn about unused variable.
  */
@@ -264,8 +255,6 @@
  */
 #define cx_attr_nodiscard __attribute__((__warn_unused_result__))
 
-#endif // __STDC_VERSION__
-
 
 // ---------------------------------------------------------------------------
 //       MSVC specifics
@@ -276,15 +265,32 @@
 #define _Thread_local __declspec(thread)
 #endif // _MSC_VER
 
+// ---------------------------------------------------------------------------
+//       Exported and inlined functions
+// ---------------------------------------------------------------------------
+
 #if defined(CX_WINDLL_EXPORT)
-#define cx_attr_export __declspec(dllexport)
+#define CX_EXPORT __declspec(dllexport)
 #elif defined(CX_WINDLL)
-#define cx_attr_export __declspec(dllimport)
+#define CX_EXPORT __declspec(dllimport)
 #else
 /** Only used for building Windows DLLs. */
-#define cx_attr_export
+#define CX_EXPORT
 #endif // CX_WINDLL / CX_WINDLL_EXPORT
 
+#ifdef __GNUC__
+/**
+ * Declares a function to be inlined.
+ */
+#define CX_INLINE __attribute__((always_inline)) static inline
+#else
+#define CX_INLINE static inline
+#endif
+/**
+ * Declares a compatibility function for C++ builds.
+ */
+#define CX_CPPDECL static inline
+
 // ---------------------------------------------------------------------------
 //       Useful function pointers
 // ---------------------------------------------------------------------------
@@ -292,22 +298,12 @@
 /**
  * Function pointer compatible with fwrite-like functions.
  */
-typedef size_t (*cx_write_func)(
-        const void *,
-        size_t,
-        size_t,
-        void *
-);
+typedef size_t (*cx_write_func)(const void*, size_t, size_t, void*);
 
 /**
  * Function pointer compatible with fread-like functions.
  */
-typedef size_t (*cx_read_func)(
-        void *,
-        size_t,
-        size_t,
-        void *
-);
+typedef size_t (*cx_read_func)(void*, size_t, size_t, void*);
 
 // ---------------------------------------------------------------------------
 //       Utility macros
@@ -359,9 +355,7 @@
 #if __cplusplus
 extern "C"
 #endif
-cx_attr_export int cx_szmul_impl(size_t a, size_t b, size_t *result);
+CX_EXPORT int cx_szmul_impl(size_t a, size_t b, size_t *result);
 #endif // cx_szmul
 
-
-
 #endif // UCX_COMMON_H