/* config-h.in. Generated from configure.ac by autoheader. */ /* Define to 1 if you have the `argz_add' function. */ #undef HAVE_ARGZ_ADD /* Define to 1 if you have the `argz_append' function. */ #undef HAVE_ARGZ_APPEND /* Define to 1 if you have the `argz_count' function. */ #undef HAVE_ARGZ_COUNT /* Define to 1 if you have the `argz_create_sep' function. */ #undef HAVE_ARGZ_CREATE_SEP /* Define to 1 if you have the header file. */ #undef HAVE_ARGZ_H /* Define to 1 if you have the `argz_insert' function. */ #undef HAVE_ARGZ_INSERT /* Define to 1 if you have the `argz_next' function. */ #undef HAVE_ARGZ_NEXT /* Define to 1 if you have the `argz_stringify' function. */ #undef HAVE_ARGZ_STRINGIFY /* Define to 1 if you have the `closedir' function. */ #undef HAVE_CLOSEDIR /* Define to 1 if you have the declaration of `cygwin_conv_path', and to 0 if you don't. */ #undef HAVE_DECL_CYGWIN_CONV_PATH /* Define to 1 if you have the header file. */ #undef HAVE_DIRENT_H /* Define if you have the GNU dld library. */ #undef HAVE_DLD /* Define to 1 if you have the header file. */ #undef HAVE_DLD_H /* Define to 1 if you have the `dlerror' function. */ #undef HAVE_DLERROR /* Define to 1 if you have the header file. */ #undef HAVE_DLFCN_H /* Define to 1 if you have the header file. */ #undef HAVE_DL_H /* Define if you have the _dyld_func_lookup function. */ #undef HAVE_DYLD /* Define to 1 if the system has the type `error_t'. */ #undef HAVE_ERROR_T /* Define to 1 if you have the header file. */ #undef HAVE_INTTYPES_H /* Define if you have the libdl library or equivalent. */ #undef HAVE_LIBDL /* Define if libdlloader will be built on this platform */ #undef HAVE_LIBDLLOADER /* Define to 1 if you have the header file. */ #undef HAVE_MACH_O_DYLD_H /* Define to 1 if you have the `opendir' function. */ #undef HAVE_OPENDIR /* Define if libtool can extract symbol lists from object files. */ #undef HAVE_PRELOADED_SYMBOLS /* Define to 1 if you have the `readdir' function. */ #undef HAVE_READDIR /* Define if you have the shl_load function. */ #undef HAVE_SHL_LOAD /* Define to 1 if you have the header file. */ #undef HAVE_STDINT_H /* Define to 1 if you have the header file. */ #undef HAVE_STDIO_H /* Define to 1 if you have the header file. */ #undef HAVE_STDLIB_H /* Define to 1 if you have the header file. */ #undef HAVE_STRINGS_H /* Define to 1 if you have the header file. */ #undef HAVE_STRING_H /* Define to 1 if you have the `strlcat' function. */ #undef HAVE_STRLCAT /* Define to 1 if you have the `strlcpy' function. */ #undef HAVE_STRLCPY /* Define to 1 if you have the header file. */ #undef HAVE_SYS_DL_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_STAT_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_TYPES_H /* Define to 1 if you have the header file. */ #undef HAVE_UNISTD_H /* This value is set to 1 to indicate that the system argz facility works */ #undef HAVE_WORKING_ARGZ /* Define if the OS needs help to load dependent libraries for dlopen(). */ #undef LTDL_DLOPEN_DEPLIBS /* Define to the system default library search path. */ #undef LT_DLSEARCH_PATH /* The archive extension */ #undef LT_LIBEXT /* The archive prefix */ #undef LT_LIBPREFIX /* Define to the extension used for runtime loadable modules, say, ".so". */ #undef LT_MODULE_EXT /* Define to the name of the environment variable that determines the run-time module search path. */ #undef LT_MODULE_PATH_VAR /* Define to the sub-directory where libtool stores uninstalled libraries. */ #undef LT_OBJDIR /* Define to the shared library suffix, say, ".dylib". */ #undef LT_SHARED_EXT /* Define to the shared archive member specification, say "(shr.o)". */ #undef LT_SHARED_LIB_MEMBER /* Define if dlsym() requires a leading underscore in symbol names. */ #undef NEED_USCORE /* Name of package */ #undef PACKAGE /* Define to the address where bug reports for this package should be sent. */ #undef PACKAGE_BUGREPORT /* Define to the full name of this package. */ #undef PACKAGE_NAME /* Define to the full name and version of this package. */ #undef PACKAGE_STRING /* Define to the one symbol short name of this package. */ #undef PACKAGE_TARNAME /* Define to the home page for this package. */ #undef PACKAGE_URL /* Define to the version of this package. */ #undef PACKAGE_VERSION /* Define to 1 if all of the C90 standard headers exist (not just the ones required in a freestanding environment). This macro is provided for backward compatibility; new code need not use it. */ #undef STDC_HEADERS /* Version number of package */ #undef VERSION /* True if the compiler says it groks GNU C version MAJOR.MINOR. */ #if defined __GNUC__ && defined __GNUC_MINOR__ # define _GL_GNUC_PREREQ(major, minor) \ ((major) < __GNUC__ + ((minor) <= __GNUC_MINOR__)) #else # define _GL_GNUC_PREREQ(major, minor) 0 #endif /* The _Noreturn keyword of C11. */ #ifndef _Noreturn # if (defined __cplusplus \ && ((201103 <= __cplusplus && !(__GNUC__ == 4 && __GNUC_MINOR__ == 7)) \ || (defined _MSC_VER && 1900 <= _MSC_VER)) \ && 0) /* [[noreturn]] is not practically usable, because with it the syntax extern _Noreturn void func (...); would not be valid; such a declaration would only be valid with 'extern' and '_Noreturn' swapped, or without the 'extern' keyword. However, some AIX system header files and several gnulib header files use precisely this syntax with 'extern'. */ # define _Noreturn [[noreturn]] # elif (defined __clang__ && __clang_major__ < 16 \ && defined _GL_WORK_AROUND_LLVM_BUG_59792) /* Compile with -D_GL_WORK_AROUND_LLVM_BUG_59792 to work around that rare LLVM bug, though you may get many false-alarm warnings. */ # define _Noreturn # elif ((!defined __cplusplus || defined __clang__) \ && (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) \ || (!defined __STRICT_ANSI__ \ && (_GL_GNUC_PREREQ (4, 7) \ || (defined __apple_build_version__ \ ? 6000000 <= __apple_build_version__ \ : 3 < __clang_major__ + (5 <= __clang_minor__)))))) /* _Noreturn works as-is. */ # elif _GL_GNUC_PREREQ (2, 8) || defined __clang__ || 0x5110 <= __SUNPRO_C # define _Noreturn __attribute__ ((__noreturn__)) # elif 1200 <= (defined _MSC_VER ? _MSC_VER : 0) # define _Noreturn __declspec (noreturn) # else # define _Noreturn # endif #endif /* Define so that glibc/gnulib argp.h does not typedef error_t. */ #undef __error_t_defined /* The _GL_ASYNC_SAFE marker should be attached to functions that are signal handlers (for signals other than SIGABRT, SIGPIPE) or can be invoked from such signal handlers. Such functions have some restrictions: * All functions that it calls should be marked _GL_ASYNC_SAFE as well, or should be listed as async-signal-safe in POSIX section 2.4.3. Note that malloc(), sprintf(), and fwrite(), in particular, are NOT async-signal-safe. * All memory locations (variables and struct fields) that these functions access must be marked 'volatile'. This holds for both read and write accesses. Otherwise the compiler might optimize away stores to and reads from such locations that occur in the program, depending on its data flow analysis. For example, when the program contains a loop that is intended to inspect a variable set from within a signal handler while (!signal_occurred) ; the compiler is allowed to transform this into an endless loop if the variable 'signal_occurred' is not declared 'volatile'. Additionally, recall that: * A signal handler should not modify errno (except if it is a handler for a fatal signal and ends by raising the same signal again, thus provoking the termination of the process). If it invokes a function that may clobber errno, it needs to save and restore the value of errno. */ #define _GL_ASYNC_SAFE /* Attributes. */ #if (defined __has_attribute \ && (!defined __clang_minor__ \ || (defined __apple_build_version__ \ ? 6000000 <= __apple_build_version__ \ : 5 <= __clang_major__))) # define _GL_HAS_ATTRIBUTE(attr) __has_attribute (__##attr##__) #else # define _GL_HAS_ATTRIBUTE(attr) _GL_ATTR_##attr # define _GL_ATTR_alloc_size _GL_GNUC_PREREQ (4, 3) # define _GL_ATTR_always_inline _GL_GNUC_PREREQ (3, 2) # define _GL_ATTR_artificial _GL_GNUC_PREREQ (4, 3) # define _GL_ATTR_cold _GL_GNUC_PREREQ (4, 3) # define _GL_ATTR_const _GL_GNUC_PREREQ (2, 95) # define _GL_ATTR_deprecated _GL_GNUC_PREREQ (3, 1) # define _GL_ATTR_diagnose_if 0 # define _GL_ATTR_error _GL_GNUC_PREREQ (4, 3) # define _GL_ATTR_externally_visible _GL_GNUC_PREREQ (4, 1) # define _GL_ATTR_fallthrough _GL_GNUC_PREREQ (7, 0) # define _GL_ATTR_format _GL_GNUC_PREREQ (2, 7) # define _GL_ATTR_leaf _GL_GNUC_PREREQ (4, 6) # define _GL_ATTR_malloc _GL_GNUC_PREREQ (3, 0) # ifdef _ICC # define _GL_ATTR_may_alias 0 # else # define _GL_ATTR_may_alias _GL_GNUC_PREREQ (3, 3) # endif # define _GL_ATTR_noinline _GL_GNUC_PREREQ (3, 1) # define _GL_ATTR_nonnull _GL_GNUC_PREREQ (3, 3) # define _GL_ATTR_nonstring _GL_GNUC_PREREQ (8, 0) # define _GL_ATTR_nothrow _GL_GNUC_PREREQ (3, 3) # define _GL_ATTR_packed _GL_GNUC_PREREQ (2, 7) # define _GL_ATTR_pure _GL_GNUC_PREREQ (2, 96) # define _GL_ATTR_returns_nonnull _GL_GNUC_PREREQ (4, 9) # define _GL_ATTR_sentinel _GL_GNUC_PREREQ (4, 0) # define _GL_ATTR_unused _GL_GNUC_PREREQ (2, 7) # define _GL_ATTR_warn_unused_result _GL_GNUC_PREREQ (3, 4) #endif /* Disable GCC -Wpedantic if using __has_c_attribute and this is not C23+. */ #if (defined __has_c_attribute && _GL_GNUC_PREREQ (4, 6) \ && (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) <= 201710) # pragma GCC diagnostic ignored "-Wpedantic" #endif /* _GL_ATTRIBUTE_ALLOC_SIZE ((N)) declares that the Nth argument of the function is the size of the returned memory block. _GL_ATTRIBUTE_ALLOC_SIZE ((M, N)) declares that the Mth argument multiplied by the Nth argument of the function is the size of the returned memory block. */ /* Applies to: function, pointer to function, function types. */ #ifndef _GL_ATTRIBUTE_ALLOC_SIZE # if _GL_HAS_ATTRIBUTE (alloc_size) # define _GL_ATTRIBUTE_ALLOC_SIZE(args) __attribute__ ((__alloc_size__ args)) # else # define _GL_ATTRIBUTE_ALLOC_SIZE(args) # endif #endif /* _GL_ATTRIBUTE_ALWAYS_INLINE tells that the compiler should always inline the function and report an error if it cannot do so. */ /* Applies to: function. */ #ifndef _GL_ATTRIBUTE_ALWAYS_INLINE # if _GL_HAS_ATTRIBUTE (always_inline) # define _GL_ATTRIBUTE_ALWAYS_INLINE __attribute__ ((__always_inline__)) # else # define _GL_ATTRIBUTE_ALWAYS_INLINE # endif #endif /* _GL_ATTRIBUTE_ARTIFICIAL declares that the function is not important to show in stack traces when debugging. The compiler should omit the function from stack traces. */ /* Applies to: function. */ #ifndef _GL_ATTRIBUTE_ARTIFICIAL # if _GL_HAS_ATTRIBUTE (artificial) # define _GL_ATTRIBUTE_ARTIFICIAL __attribute__ ((__artificial__)) # else # define _GL_ATTRIBUTE_ARTIFICIAL # endif #endif /* _GL_ATTRIBUTE_COLD declares that the function is rarely executed. */ /* Applies to: functions. */ /* Avoid __attribute__ ((cold)) on MinGW; see thread starting at . Also, Oracle Studio 12.6 requires 'cold' not '__cold__'. */ #ifndef _GL_ATTRIBUTE_COLD # if _GL_HAS_ATTRIBUTE (cold) && !defined __MINGW32__ # ifndef __SUNPRO_C # define _GL_ATTRIBUTE_COLD __attribute__ ((__cold__)) # else # define _GL_ATTRIBUTE_COLD __attribute__ ((cold)) # endif # else # define _GL_ATTRIBUTE_COLD # endif #endif /* _GL_ATTRIBUTE_CONST declares that it is OK for a compiler to omit duplicate calls to the function with the same arguments. This attribute is safe for a function that neither depends on nor affects observable state, and always returns exactly once - e.g., does not loop forever, and does not call longjmp. (This attribute is stricter than _GL_ATTRIBUTE_PURE.) */ /* Applies to: functions. */ #ifndef _GL_ATTRIBUTE_CONST # if _GL_HAS_ATTRIBUTE (const) # define _GL_ATTRIBUTE_CONST __attribute__ ((__const__)) # else # define _GL_ATTRIBUTE_CONST # endif #endif /* _GL_ATTRIBUTE_DEALLOC (F, I) declares that the function returns pointers that can be freed by passing them as the Ith argument to the function F. _GL_ATTRIBUTE_DEALLOC_FREE declares that the function returns pointers that can be freed via 'free'; it can be used only after declaring 'free'. */ /* Applies to: functions. Cannot be used on inline functions. */ #ifndef _GL_ATTRIBUTE_DEALLOC # if _GL_GNUC_PREREQ (11, 0) # define _GL_ATTRIBUTE_DEALLOC(f, i) __attribute__ ((__malloc__ (f, i))) # else # define _GL_ATTRIBUTE_DEALLOC(f, i) # endif #endif /* If gnulib's or has already defined this macro, continue to use this earlier definition, since may not have been included yet. */ #ifndef _GL_ATTRIBUTE_DEALLOC_FREE # if defined __cplusplus && defined __GNUC__ && !defined __clang__ /* Work around GCC bug */ # define _GL_ATTRIBUTE_DEALLOC_FREE \ _GL_ATTRIBUTE_DEALLOC ((void (*) (void *)) free, 1) # else # define _GL_ATTRIBUTE_DEALLOC_FREE \ _GL_ATTRIBUTE_DEALLOC (free, 1) # endif #endif /* _GL_ATTRIBUTE_DEPRECATED: Declares that an entity is deprecated. The compiler may warn if the entity is used. */ /* Applies to: - function, variable, - struct, union, struct/union member, - enumeration, enumeration item, - typedef, in C++ also: namespace, class, template specialization. */ #ifndef _GL_ATTRIBUTE_DEPRECATED # ifdef __has_c_attribute # if __has_c_attribute (__deprecated__) # define _GL_ATTRIBUTE_DEPRECATED [[__deprecated__]] # endif # endif # if !defined _GL_ATTRIBUTE_DEPRECATED && _GL_HAS_ATTRIBUTE (deprecated) # define _GL_ATTRIBUTE_DEPRECATED __attribute__ ((__deprecated__)) # endif # ifndef _GL_ATTRIBUTE_DEPRECATED # define _GL_ATTRIBUTE_DEPRECATED # endif #endif /* _GL_ATTRIBUTE_ERROR(msg) requests an error if a function is called and the function call is not optimized away. _GL_ATTRIBUTE_WARNING(msg) requests a warning if a function is called and the function call is not optimized away. */ /* Applies to: functions. */ #if !(defined _GL_ATTRIBUTE_ERROR && defined _GL_ATTRIBUTE_WARNING) # if _GL_HAS_ATTRIBUTE (error) # define _GL_ATTRIBUTE_ERROR(msg) __attribute__ ((__error__ (msg))) # define _GL_ATTRIBUTE_WARNING(msg) __attribute__ ((__warning__ (msg))) # elif _GL_HAS_ATTRIBUTE (diagnose_if) # define _GL_ATTRIBUTE_ERROR(msg) __attribute__ ((__diagnose_if__ (1, msg, "error"))) # define _GL_ATTRIBUTE_WARNING(msg) __attribute__ ((__diagnose_if__ (1, msg, "warning"))) # else # define _GL_ATTRIBUTE_ERROR(msg) # define _GL_ATTRIBUTE_WARNING(msg) # endif #endif /* _GL_ATTRIBUTE_EXTERNALLY_VISIBLE declares that the entity should remain visible to debuggers etc., even with '-fwhole-program'. */ /* Applies to: functions, variables. */ #ifndef _GL_ATTRIBUTE_EXTERNALLY_VISIBLE # if _GL_HAS_ATTRIBUTE (externally_visible) # define _GL_ATTRIBUTE_EXTERNALLY_VISIBLE __attribute__ ((externally_visible)) # else # define _GL_ATTRIBUTE_EXTERNALLY_VISIBLE # endif #endif /* _GL_ATTRIBUTE_FALLTHROUGH declares that it is not a programming mistake if the control flow falls through to the immediately following 'case' or 'default' label. The compiler should not warn in this case. */ /* Applies to: Empty statement (;), inside a 'switch' statement. */ /* Always expands to something. */ #ifndef _GL_ATTRIBUTE_FALLTHROUGH # ifdef __has_c_attribute # if __has_c_attribute (__fallthrough__) # define _GL_ATTRIBUTE_FALLTHROUGH [[__fallthrough__]] # endif # endif # if !defined _GL_ATTRIBUTE_FALLTHROUGH && _GL_HAS_ATTRIBUTE (fallthrough) # define _GL_ATTRIBUTE_FALLTHROUGH __attribute__ ((__fallthrough__)) # endif # ifndef _GL_ATTRIBUTE_FALLTHROUGH # define _GL_ATTRIBUTE_FALLTHROUGH ((void) 0) # endif #endif /* _GL_ATTRIBUTE_FORMAT ((ARCHETYPE, STRING-INDEX, FIRST-TO-CHECK)) declares that the STRING-INDEXth function argument is a format string of style ARCHETYPE, which is one of: printf, gnu_printf scanf, gnu_scanf, strftime, gnu_strftime, strfmon, or the same thing prefixed and suffixed with '__'. If FIRST-TO-CHECK is not 0, arguments starting at FIRST-TO_CHECK are suitable for the format string. */ /* Applies to: functions. */ #ifndef _GL_ATTRIBUTE_FORMAT # if _GL_HAS_ATTRIBUTE (format) # define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec)) # else # define _GL_ATTRIBUTE_FORMAT(spec) # endif #endif /* _GL_ATTRIBUTE_LEAF declares that if the function is called from some other compilation unit, it executes code from that unit only by return or by exception handling. This declaration lets the compiler optimize that unit more aggressively. */ /* Applies to: functions. */ #ifndef _GL_ATTRIBUTE_LEAF # if _GL_HAS_ATTRIBUTE (leaf) # define _GL_ATTRIBUTE_LEAF __attribute__ ((__leaf__)) # else # define _GL_ATTRIBUTE_LEAF # endif #endif /* _GL_ATTRIBUTE_MALLOC declares that the function returns a pointer to freshly allocated memory. */ /* Applies to: functions. */ #ifndef _GL_ATTRIBUTE_MALLOC # if _GL_HAS_ATTRIBUTE (malloc) # define _GL_ATTRIBUTE_MALLOC __attribute__ ((__malloc__)) # else # define _GL_ATTRIBUTE_MALLOC # endif #endif /* _GL_ATTRIBUTE_MAY_ALIAS declares that pointers to the type may point to the same storage as pointers to other types. Thus this declaration disables strict aliasing optimization. */ /* Applies to: types. */ /* Oracle Studio 12.6 mishandles may_alias despite __has_attribute OK. */ #ifndef _GL_ATTRIBUTE_MAY_ALIAS # if _GL_HAS_ATTRIBUTE (may_alias) && !defined __SUNPRO_C # define _GL_ATTRIBUTE_MAY_ALIAS __attribute__ ((__may_alias__)) # else # define _GL_ATTRIBUTE_MAY_ALIAS # endif #endif /* _GL_ATTRIBUTE_MAYBE_UNUSED declares that it is not a programming mistake if the entity is not used. The compiler should not warn if the entity is not used. */ /* Applies to: - function, variable, - struct, union, struct/union member, - enumeration, enumeration item, - typedef, in C++ also: class. */ /* In C++ and C23, this is spelled [[__maybe_unused__]]. GCC's syntax is __attribute__ ((__unused__)). clang supports both syntaxes. Except that with clang ≥ 6, < 10, in C++ mode, __has_c_attribute (__maybe_unused__) yields true but the use of [[__maybe_unused__]] nevertheless produces a warning. */ #ifndef _GL_ATTRIBUTE_MAYBE_UNUSED # if defined __clang__ && defined __cplusplus # if !defined __apple_build_version__ && __clang_major__ >= 10 # define _GL_ATTRIBUTE_MAYBE_UNUSED [[__maybe_unused__]] # endif # elif defined __has_c_attribute # if __has_c_attribute (__maybe_unused__) # define _GL_ATTRIBUTE_MAYBE_UNUSED [[__maybe_unused__]] # endif # endif # ifndef _GL_ATTRIBUTE_MAYBE_UNUSED # define _GL_ATTRIBUTE_MAYBE_UNUSED _GL_ATTRIBUTE_UNUSED # endif #endif /* Alternative spelling of this macro, for convenience and for compatibility with glibc/include/libc-symbols.h. */ #define _GL_UNUSED _GL_ATTRIBUTE_MAYBE_UNUSED /* Earlier spellings of this macro. */ #define _UNUSED_PARAMETER_ _GL_ATTRIBUTE_MAYBE_UNUSED /* _GL_ATTRIBUTE_NODISCARD declares that the caller of the function should not discard the return value. The compiler may warn if the caller does not use the return value, unless the caller uses something like ignore_value. */ /* Applies to: function, enumeration, class. */ #ifndef _GL_ATTRIBUTE_NODISCARD # if defined __clang__ && defined __cplusplus /* With clang up to 15.0.6 (at least), in C++ mode, [[__nodiscard__]] produces a warning. The 1000 below means a yet unknown threshold. When clang++ version X starts supporting [[__nodiscard__]] without warning about it, you can replace the 1000 with X. */ # if __clang_major__ >= 1000 # define _GL_ATTRIBUTE_NODISCARD [[__nodiscard__]] # endif # elif defined __has_c_attribute # if __has_c_attribute (__nodiscard__) # define _GL_ATTRIBUTE_NODISCARD [[__nodiscard__]] # endif # endif # if !defined _GL_ATTRIBUTE_NODISCARD && _GL_HAS_ATTRIBUTE (warn_unused_result) # define _GL_ATTRIBUTE_NODISCARD __attribute__ ((__warn_unused_result__)) # endif # ifndef _GL_ATTRIBUTE_NODISCARD # define _GL_ATTRIBUTE_NODISCARD # endif #endif /* _GL_ATTRIBUTE_NOINLINE tells that the compiler should not inline the function. */ /* Applies to: functions. */ #ifndef _GL_ATTRIBUTE_NOINLINE # if _GL_HAS_ATTRIBUTE (noinline) # define _GL_ATTRIBUTE_NOINLINE __attribute__ ((__noinline__)) # else # define _GL_ATTRIBUTE_NOINLINE # endif #endif /* _GL_ATTRIBUTE_NONNULL ((N1, N2,...)) declares that the arguments N1, N2,... must not be NULL. _GL_ATTRIBUTE_NONNULL () declares that all pointer arguments must not be null. */ /* Applies to: functions. */ #ifndef _GL_ATTRIBUTE_NONNULL # if _GL_HAS_ATTRIBUTE (nonnull) # define _GL_ATTRIBUTE_NONNULL(args) __attribute__ ((__nonnull__ args)) # else # define _GL_ATTRIBUTE_NONNULL(args) # endif #endif /* _GL_ATTRIBUTE_NONSTRING declares that the contents of a character array is not meant to be NUL-terminated. */ /* Applies to: struct/union members and variables that are arrays of element type '[[un]signed] char'. */ #ifndef _GL_ATTRIBUTE_NONSTRING # if _GL_HAS_ATTRIBUTE (nonstring) # define _GL_ATTRIBUTE_NONSTRING __attribute__ ((__nonstring__)) # else # define _GL_ATTRIBUTE_NONSTRING # endif #endif /* There is no _GL_ATTRIBUTE_NORETURN; use _Noreturn instead. */ /* _GL_ATTRIBUTE_NOTHROW declares that the function does not throw exceptions. */ /* Applies to: functions. */ #ifndef _GL_ATTRIBUTE_NOTHROW # if _GL_HAS_ATTRIBUTE (nothrow) && !defined __cplusplus # define _GL_ATTRIBUTE_NOTHROW __attribute__ ((__nothrow__)) # else # define _GL_ATTRIBUTE_NOTHROW # endif #endif /* _GL_ATTRIBUTE_PACKED declares: For struct members: The member has the smallest possible alignment. For struct, union, class: All members have the smallest possible alignment, minimizing the memory required. */ /* Applies to: struct members, struct, union, in C++ also: class. */ #ifndef _GL_ATTRIBUTE_PACKED # if _GL_HAS_ATTRIBUTE (packed) # define _GL_ATTRIBUTE_PACKED __attribute__ ((__packed__)) # else # define _GL_ATTRIBUTE_PACKED # endif #endif /* _GL_ATTRIBUTE_PURE declares that It is OK for a compiler to omit duplicate calls to the function with the same arguments if observable state is not changed between calls. This attribute is safe for a function that does not affect observable state, and always returns exactly once. (This attribute is looser than _GL_ATTRIBUTE_CONST.) */ /* Applies to: functions. */ #ifndef _GL_ATTRIBUTE_PURE # if _GL_HAS_ATTRIBUTE (pure) # define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__)) # else # define _GL_ATTRIBUTE_PURE # endif #endif /* _GL_ATTRIBUTE_RETURNS_NONNULL declares that the function's return value is a non-NULL pointer. */ /* Applies to: functions. */ #ifndef _GL_ATTRIBUTE_RETURNS_NONNULL # if _GL_HAS_ATTRIBUTE (returns_nonnull) # define _GL_ATTRIBUTE_RETURNS_NONNULL __attribute__ ((__returns_nonnull__)) # else # define _GL_ATTRIBUTE_RETURNS_NONNULL # endif #endif /* _GL_ATTRIBUTE_SENTINEL(pos) declares that the variadic function expects a trailing NULL argument. _GL_ATTRIBUTE_SENTINEL () - The last argument is NULL (requires C99). _GL_ATTRIBUTE_SENTINEL ((N)) - The (N+1)st argument from the end is NULL. */ /* Applies to: functions. */ #ifndef _GL_ATTRIBUTE_SENTINEL # if _GL_HAS_ATTRIBUTE (sentinel) # define _GL_ATTRIBUTE_SENTINEL(pos) __attribute__ ((__sentinel__ pos)) # else # define _GL_ATTRIBUTE_SENTINEL(pos) # endif #endif /* A helper macro. Don't use it directly. */ #ifndef _GL_ATTRIBUTE_UNUSED # if _GL_HAS_ATTRIBUTE (unused) # define _GL_ATTRIBUTE_UNUSED __attribute__ ((__unused__)) # else # define _GL_ATTRIBUTE_UNUSED # endif #endif /* _GL_UNUSED_LABEL; declares that it is not a programming mistake if the immediately preceding label is not used. The compiler should not warn if the label is not used. */ /* Applies to: label (both in C and C++). */ /* Note that g++ < 4.5 does not support the '__attribute__ ((__unused__)) ;' syntax. But clang does. */ #ifndef _GL_UNUSED_LABEL # if !(defined __cplusplus && !_GL_GNUC_PREREQ (4, 5)) || defined __clang__ # define _GL_UNUSED_LABEL _GL_ATTRIBUTE_UNUSED # else # define _GL_UNUSED_LABEL # endif #endif /* Define to a type to use for 'error_t' if it is not otherwise available. */ #undef error_t /* Work around a bug in Apple GCC 4.0.1 build 5465: In C99 mode, it supports the ISO C 99 semantics of 'extern inline' (unlike the GNU C semantics of earlier versions), but does not display it by setting __GNUC_STDC_INLINE__. __APPLE__ && __MACH__ test for Mac OS X. __APPLE_CC__ tests for the Apple compiler and its version. __STDC_VERSION__ tests for the C99 mode. */ #if defined __APPLE__ && defined __MACH__ && __APPLE_CC__ >= 5465 && !defined __cplusplus && __STDC_VERSION__ >= 199901L && !defined __GNUC_STDC_INLINE__ # define __GNUC_STDC_INLINE__ 1 #endif /* _GL_CMP (n1, n2) performs a three-valued comparison on n1 vs. n2, where n1 and n2 are expressions without side effects, that evaluate to real numbers (excluding NaN). It returns 1 if n1 > n2 0 if n1 == n2 -1 if n1 < n2 The naïve code (n1 > n2 ? 1 : n1 < n2 ? -1 : 0) produces a conditional jump with nearly all GCC versions up to GCC 10. This variant (n1 < n2 ? -1 : n1 > n2) produces a conditional with many GCC versions up to GCC 9. The better code (n1 > n2) - (n1 < n2) from Hacker's Delight § 2-9 avoids conditional jumps in all GCC versions >= 3.4. */ #define _GL_CMP(n1, n2) (((n1) > (n2)) - ((n1) < (n2)))