+2022-02-09 Bruno Haible <bruno@clisp.org>
+
+ string: Fix "mismatched allocation function" warnings regarding strndup.
+ * lib/string.in.h (strndup): Mark with _GL_ATTRIBUTE_MALLOC and
+ _GL_ATTRIBUTE_DEALLOC_FREE. For GCC >= 11: Declare also when the
+ platform already declares the function or when the module 'strndup' is
+ not in use.
+
2022-02-09 Bruno Haible <bruno@clisp.org>
unictype/category-byname: Fix test failure.
# undef strndup
# define strndup rpl_strndup
# endif
-_GL_FUNCDECL_RPL (strndup, char *, (char const *__s, size_t __n)
- _GL_ARG_NONNULL ((1)));
+_GL_FUNCDECL_RPL (strndup, char *,
+ (char const *__s, size_t __n)
+ _GL_ARG_NONNULL ((1))
+ _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
_GL_CXXALIAS_RPL (strndup, char *, (char const *__s, size_t __n));
# else
-# if ! @HAVE_DECL_STRNDUP@
-_GL_FUNCDECL_SYS (strndup, char *, (char const *__s, size_t __n)
- _GL_ARG_NONNULL ((1)));
+# if !@HAVE_DECL_STRNDUP@ || __GNUC__ >= 11
+_GL_FUNCDECL_SYS (strndup, char *,
+ (char const *__s, size_t __n)
+ _GL_ARG_NONNULL ((1))
+ _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
# endif
_GL_CXXALIAS_SYS (strndup, char *, (char const *__s, size_t __n));
# endif
_GL_CXXALIASWARN (strndup);
-#elif defined GNULIB_POSIXCHECK
-# undef strndup
-# if HAVE_RAW_DECL_STRNDUP
+#else
+# if __GNUC__ >= 11
+/* For -Wmismatched-dealloc: Associate strndup with free or rpl_free. */
+_GL_FUNCDECL_SYS (strndup, char *,
+ (char const *__s, size_t __n)
+ _GL_ARG_NONNULL ((1))
+ _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
+# endif
+# if defined GNULIB_POSIXCHECK
+# undef strndup
+# if HAVE_RAW_DECL_STRNDUP
_GL_WARN_ON_USE (strndup, "strndup is unportable - "
"use gnulib module strndup for portability");
+# endif
# endif
#endif