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Correct Clang feature detection

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Clang's __GNUC__ and __GNUC_MINOR__ definitions are not reliable and may
not be defined at all when targeting the MSVC ABI. Use feature-checking
macros when possible or check for __clang__.

[guillem@hadrons.org: Update for __ protected keyword change. ]

Signed-off-by: Guillem Jover <guillem@hadrons.org>
This commit is contained in:
Aaron Dierking 2018-06-14 11:38:31 -07:00 committed by Guillem Jover
parent 574c7a1365
commit 7cfa2d4530
2 changed files with 20 additions and 13 deletions
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27
include/bsd/sys/cdefs.h
View File

@ -30,6 +30,13 @@
#ifndef __has_include_next
#define __has_include_next(x) 1
#endif
#ifndef __has_attribute
#define __has_attribute(x) 0
#endif
/* Clang expands this to 1 if an identifier is *not* reserved. */
#ifndef __is_identifier
#define __is_identifier(x) 1
#endif
#ifdef LIBBSD_OVERLAY
/*
@ -85,7 +92,7 @@
#define LIBBSD_GCC_VERSION 0
#endif
#if LIBBSD_GCC_VERSION >= 0x0405
#if LIBBSD_GCC_VERSION >= 0x0405 || __has_attribute(__deprecated__)
#define LIBBSD_DEPRECATED(x) __attribute__((__deprecated__(x)))
#elif LIBBSD_GCC_VERSION >= 0x0301
#define LIBBSD_DEPRECATED(x) __attribute__((__deprecated__))
@ -93,14 +100,14 @@
#define LIBBSD_DEPRECATED(x)
#endif
#if LIBBSD_GCC_VERSION >= 0x0200
#if LIBBSD_GCC_VERSION >= 0x0200 || defined(__clang__)
#define LIBBSD_REDIRECT(name, proto, alias) name proto __asm__(LIBBSD_ASMNAME(#alias))
#endif
#define LIBBSD_ASMNAME(cname) LIBBSD_ASMNAME_PREFIX(__USER_LABEL_PREFIX__, cname)
#define LIBBSD_ASMNAME_PREFIX(prefix, cname) LIBBSD_STRING(prefix) cname
#ifndef __dead2
# if LIBBSD_GCC_VERSION >= 0x0207
# if LIBBSD_GCC_VERSION >= 0x0207 || __has_attribute(__noreturn__)
# define __dead2 __attribute__((__noreturn__))
# else
# define __dead2
@ -108,7 +115,7 @@
#endif
#ifndef __pure2
# if LIBBSD_GCC_VERSION >= 0x0207
# if LIBBSD_GCC_VERSION >= 0x0207 || __has_attribute(__const__)
# define __pure2 __attribute__((__const__))
# else
# define __pure2
@ -116,7 +123,7 @@
#endif
#ifndef __packed
# if LIBBSD_GCC_VERSION >= 0x0207
# if LIBBSD_GCC_VERSION >= 0x0207 || __has_attribute(__packed__)
# define __packed __attribute__((__packed__))
# else
# define __packed
@ -124,7 +131,7 @@
#endif
#ifndef __aligned
# if LIBBSD_GCC_VERSION >= 0x0207
# if LIBBSD_GCC_VERSION >= 0x0207 || __has_attribute(__aligned__)
# define __aligned(x) __attribute__((__aligned__(x)))
# else
# define __aligned(x)
@ -145,7 +152,7 @@
#endif
#ifndef __printflike
# if LIBBSD_GCC_VERSION >= 0x0300
# if LIBBSD_GCC_VERSION >= 0x0300 || __has_attribute(__format__)
# define __printflike(x, y) __attribute((__format__(__printf__, (x), (y))))
# else
# define __printflike(x, y)
@ -153,7 +160,7 @@
#endif
#ifndef __nonnull
# if LIBBSD_GCC_VERSION >= 0x0302
# if LIBBSD_GCC_VERSION >= 0x0302 || __has_attribute(__nonnull__)
# define __nonnull(x) __attribute__((__nonnull__(x)))
# else
# define __nonnull(x)
@ -175,7 +182,7 @@
* require it.
*/
#ifndef __offsetof
# if LIBBSD_GCC_VERSION >= 0x0401
# if LIBBSD_GCC_VERSION >= 0x0401 || !__is_identifier(__builtin_offsetof)
# define __offsetof(type, field) __builtin_offsetof(type, field)
# else
# ifndef __cplusplus
@ -200,7 +207,7 @@
* compatible with member m.
*/
#ifndef __containerof
# if LIBBSD_GCC_VERSION >= 0x0301
# if LIBBSD_GCC_VERSION >= 0x0301 || !__is_identifier(__typeof__)
# define __containerof(x, s, m) ({ \
const volatile __typeof__(((s *)0)->m) *__x = (x); \
__DEQUALIFY(s *, (const volatile char *)__x - __offsetof(s, m)); \

6
src/arc4random.c
View File

@ -39,11 +39,11 @@
#define minimum(a, b) ((a) < (b) ? (a) : (b))
#if defined(__GNUC__) || defined(_MSC_VER)
#if defined(__GNUC__) || defined(__clang__) || defined(_MSC_VER)
#define inline __inline
#else /* __GNUC__ || _MSC_VER */
#else /* __GNUC__ || __clang__ || _MSC_VER */
#define inline
#endif /* !__GNUC__ && !_MSC_VER */
#endif /* !__GNUC__ && !__clang__ && !_MSC_VER */
#define KEYSZ 32
#define IVSZ 8