#include <stdbool.h>
+/* GNUC_PREREQ (V, W, X) is true if this is GNU C version V.W.X or later.
+ It can be used in a preprocessor expression. */
+#ifndef __GNUC_MINOR__
+# define GNUC_PREREQ(v, w, x) false
+#elif ! defined __GNUC_PATCHLEVEL__
+# define GNUC_PREREQ(v, w, x) \
+ ((v) < __GNUC__ + ((w) < __GNUC_MINOR__ + ((x) == 0))
+#else
+# define GNUC_PREREQ(v, w, x) \
+ ((v) < __GNUC__ + ((w) < __GNUC_MINOR__ + ((x) <= __GNUC_PATCHLEVEL__)))
+#endif
+
/* The type of bool bitfields. Needed to compile Objective-C with
standard GCC. It was also needed to port to pre-C99 compilers,
although we don't care about that any more. */
on arguments like alloc_size that are handled in this simulation. */
#ifndef __has_attribute
# define __has_attribute(a) __has_attribute_##a
-# define __has_attribute_alloc_size (4 < __GNUC__ + (3 <= __GNUC_MINOR__))
-# define __has_attribute_cleanup (3 < __GNUC__ + (4 <= __GNUC_MINOR__))
-# define __has_attribute_externally_visible \
- (4 < __GNUC__ + (1 <= __GNUC_MINOR__))
+# define __has_attribute_alloc_size GNUC_PREREQ (4, 3, 0)
+# define __has_attribute_cleanup GNUC_PREREQ (3, 4, 0)
+# define __has_attribute_externally_visible GNUC_PREREQ (4, 1, 0)
# define __has_attribute_no_address_safety_analysis false
-# define __has_attribute_no_sanitize_address \
- (4 < __GNUC__ + (8 <= __GNUC_MINOR__))
+# define __has_attribute_no_sanitize_address GNUC_PREREQ (4, 8, 0)
+#endif
+
+/* Simulate __has_builtin on compilers that lack it. It is used only
+ on arguments like __builtin_assume_aligned that are handled in this
+ simulation. */
+#ifndef __has_builtin
+# define __has_builtin(a) __has_builtin_##a
+# define __has_builtin___builtin_assume_aligned GNUC_PREREQ (4, 7, 0)
#endif
/* Simulate __has_feature on compilers that lack it. It is used only
# define ADDRESS_SANITIZER false
#endif
+/* Yield PTR, which must be aligned to ALIGNMENT. */
+#if ! __has_builtin (__builtin_assume_aligned)
+# define __builtin_assume_aligned(ptr, ...) ((void *) (ptr))
+#endif
+
#ifdef DARWIN_OS
#ifdef emacs
#define malloc unexec_malloc
# define HAVE_LSTAT 1
#else
# define lstat stat
+/* DJGPP 2.03 and older don't have the next two. */
+# define EOVERFLOW ERANGE
+# define SIZE_MAX 4294967295U
#endif
/* We must intercept 'opendir' calls to stash away the directory name,
#endif
#ifdef CYGWIN
-#define SYSTEM_PURESIZE_EXTRA 10000
+#define SYSTEM_PURESIZE_EXTRA 50000
#endif
#if defined HAVE_NTGUI && !defined DebPrint
extern void _DebPrint (const char *fmt, ...);
# define DebPrint(stuff) _DebPrint stuff
# else
-# define DebPrint(stuff)
+# define DebPrint(stuff) ((void) 0)
# endif
#endif
#define EXTERNALLY_VISIBLE
#endif
-#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
+#if GNUC_PREREQ (2, 7, 0)
# define ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
#else
# define ATTRIBUTE_FORMAT(spec) /* empty */
#endif
-#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4)
-# define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
- ATTRIBUTE_FORMAT ((__gnu_printf__, formatstring_parameter, first_argument))
+#if GNUC_PREREQ (4, 4, 0) && defined __GLIBC_MINOR__
+# define PRINTF_ARCHETYPE __gnu_printf__
+#elif GNUC_PREREQ (4, 4, 0) && defined __MINGW32__
+# define PRINTF_ARCHETYPE __ms_printf__
#else
-# define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
- ATTRIBUTE_FORMAT ((__printf__, formatstring_parameter, first_argument))
+# define PRINTF_ARCHETYPE __printf__
#endif
+#define ATTRIBUTE_FORMAT_PRINTF(string_index, first_to_check) \
+ ATTRIBUTE_FORMAT ((PRINTF_ARCHETYPE, string_index, first_to_check))
#define ATTRIBUTE_CONST _GL_ATTRIBUTE_CONST
#define ATTRIBUTE_UNUSED _GL_UNUSED
no_sanitize_address attribute. This bug is fixed in GCC 4.9.0 and
clang 3.4. */
#if (! ADDRESS_SANITIZER \
- || ((4 < __GNUC__ + (9 <= __GNUC_MINOR__)) \
+ || (GNUC_PREREQ (4, 9, 0) \
|| 3 < __clang_major__ + (4 <= __clang_minor__)))
# define ADDRESS_SANITIZER_WORKAROUND /* No workaround needed. */
#else
# define FLEXIBLE_ARRAY_MEMBER
#endif
-/* Use this to suppress gcc's `...may be used before initialized' warnings. */
-#ifdef lint
-/* Use CODE only if lint checking is in effect. */
-# define IF_LINT(Code) Code
+/* When used in place of 'volatile', 'NONVOLATILE' is equivalent to nothing,
+ except it cajoles GCC into not warning incorrectly that a variable needs to
+ be volatile. This works around GCC bug 54561. */
+#if defined GCC_LINT || defined lint
+# define NONVOLATILE volatile
+#else
+# define NONVOLATILE /* empty */
+#endif
+
+/* 'int x UNINIT;' is equivalent to 'int x;', except it cajoles GCC
+ into not warning incorrectly about use of an uninitialized variable. */
+#if defined GCC_LINT || defined lint
+# define UNINIT = {0,}
#else
-# define IF_LINT(Code) /* empty */
+# define UNINIT /* empty */
#endif
/* conf_post.h ends here */