mirror of
https://gitlab.gnome.org/GNOME/glib.git
synced 2024-11-10 03:16:17 +01:00
gmacros.h: use g_macro__has_attribute() where possible
Fall back to compiler version checks only when `__has_attribute()` is not available. clang-cl doesn't define `__GNU__`, but still accepts attributes. This change gets rid of a lot of warnings when building GLib with clang-cl. For GCC and non-cl Clang nothing should change.
This commit is contained in:
Aleksandr Mezin
parent
a78b7ebb20
commit
2b9bf7b162
@ -754,6 +754,21 @@ g_macro__has_attribute
|
||||
g_macro__has_builtin
|
||||
g_macro__has_feature
|
||||
g_macro__has_extension
|
||||
g_macro__has_attribute___alloc_size__
|
||||
g_macro__has_attribute___const__
|
||||
g_macro__has_attribute___deprecated__
|
||||
g_macro__has_attribute___format__
|
||||
g_macro__has_attribute___format_arg__
|
||||
g_macro__has_attribute___malloc__
|
||||
g_macro__has_attribute___no_instrument_function__
|
||||
g_macro__has_attribute___noreturn__
|
||||
g_macro__has_attribute___pure__
|
||||
g_macro__has_attribute___sentinel__
|
||||
g_macro__has_attribute___unused__
|
||||
g_macro__has_attribute_fallthrough
|
||||
g_macro__has_attribute_may_alias
|
||||
g_macro__has_attribute_noinline
|
||||
g_macro__has_attribute_warn_unused_result
|
||||
</SECTION>
|
||||
|
||||
<SECTION>
|
||||
|
||||
127
glib/gmacros.h
127
glib/gmacros.h
@ -37,6 +37,12 @@
|
||||
*/
|
||||
#include <stddef.h>
|
||||
|
||||
/*
|
||||
* Note: Clang (but not clang-cl) defines __GNUC__ and __GNUC_MINOR__.
|
||||
* Both Clang 11.1 on current Arch Linux and Apple's Clang 12.0 define
|
||||
* __GNUC__ = 4 and __GNUC_MINOR__ = 2. So G_GNUC_CHECK_VERSION(4, 2) on
|
||||
* current Clang will be 1.
|
||||
*/
|
||||
#ifdef __GNUC__
|
||||
#define G_GNUC_CHECK_VERSION(major, minor) \
|
||||
((__GNUC__ > (major)) || \
|
||||
@ -106,6 +112,39 @@
|
||||
# define G_INLINE_FUNC static inline GLIB_DEPRECATED_MACRO_IN_2_48_FOR(static inline)
|
||||
#endif /* G_IMPLEMENT_INLINES */
|
||||
|
||||
/*
|
||||
* Attribute support detection. Works on clang and GCC >= 5
|
||||
* https://clang.llvm.org/docs/LanguageExtensions.html#has-attribute
|
||||
* https://gcc.gnu.org/onlinedocs/cpp/_005f_005fhas_005fattribute.html
|
||||
*/
|
||||
|
||||
#ifdef __has_attribute
|
||||
#define g_macro__has_attribute __has_attribute
|
||||
#else
|
||||
|
||||
/*
|
||||
* Fallback for GCC < 5 and other compilers not supporting __has_attribute.
|
||||
*/
|
||||
#define g_macro__has_attribute(x) g_macro__has_attribute_##x
|
||||
|
||||
#define g_macro__has_attribute___pure__ G_GNUC_CHECK_VERSION (2, 96)
|
||||
#define g_macro__has_attribute___malloc__ G_GNUC_CHECK_VERSION (2, 96)
|
||||
#define g_macro__has_attribute_noinline G_GNUC_CHECK_VERSION (2, 96)
|
||||
#define g_macro__has_attribute___sentinel__ G_GNUC_CHECK_VERSION (4, 0)
|
||||
#define g_macro__has_attribute___alloc_size__ G_GNUC_CHECK_VERSION (4, 3)
|
||||
#define g_macro__has_attribute___format__ G_GNUC_CHECK_VERSION (2, 4)
|
||||
#define g_macro__has_attribute___format_arg__ G_GNUC_CHECK_VERSION (2, 4)
|
||||
#define g_macro__has_attribute___noreturn__ G_GNUC_CHECK_VERSION (2, 4)
|
||||
#define g_macro__has_attribute___const__ G_GNUC_CHECK_VERSION (2, 4)
|
||||
#define g_macro__has_attribute___unused__ G_GNUC_CHECK_VERSION (2, 4)
|
||||
#define g_macro__has_attribute___no_instrument_function__ G_GNUC_CHECK_VERSION (2, 4)
|
||||
#define g_macro__has_attribute_fallthrough G_GNUC_CHECK_VERSION (6, 0)
|
||||
#define g_macro__has_attribute___deprecated__ G_GNUC_CHECK_VERSION (3, 1)
|
||||
#define g_macro__has_attribute_may_alias G_GNUC_CHECK_VERSION (3, 3)
|
||||
#define g_macro__has_attribute_warn_unused_result G_GNUC_CHECK_VERSION (3, 4)
|
||||
|
||||
#endif
|
||||
|
||||
/* Provide macros to feature the GCC function attribute.
|
||||
*/
|
||||
|
||||
@ -194,13 +233,21 @@
|
||||
* code which includes glib.h, even if the third party code doesn’t use the new
|
||||
* macro itself. */
|
||||
|
||||
#if G_GNUC_CHECK_VERSION(2, 96)
|
||||
#if g_macro__has_attribute(__pure__)
|
||||
#define G_GNUC_PURE __attribute__((__pure__))
|
||||
#define G_GNUC_MALLOC __attribute__((__malloc__))
|
||||
#define G_GNUC_NO_INLINE __attribute__((noinline))
|
||||
#else
|
||||
#define G_GNUC_PURE
|
||||
#endif
|
||||
|
||||
#if g_macro__has_attribute(__malloc__)
|
||||
#define G_GNUC_MALLOC __attribute__ ((__malloc__))
|
||||
#else
|
||||
#define G_GNUC_MALLOC
|
||||
#endif
|
||||
|
||||
#if g_macro__has_attribute(noinline)
|
||||
#define G_GNUC_NO_INLINE __attribute__ ((noinline))
|
||||
#else
|
||||
#define G_GNUC_NO_INLINE
|
||||
#endif
|
||||
|
||||
@ -223,7 +270,7 @@
|
||||
*
|
||||
* Since: 2.8
|
||||
*/
|
||||
#if G_GNUC_CHECK_VERSION(4, 0)
|
||||
#if g_macro__has_attribute(__sentinel__)
|
||||
#define G_GNUC_NULL_TERMINATED __attribute__((__sentinel__))
|
||||
#else
|
||||
#define G_GNUC_NULL_TERMINATED
|
||||
@ -261,12 +308,6 @@
|
||||
* So we define it to 0 to satisfy the pre-processor.
|
||||
*/
|
||||
|
||||
#ifdef __has_attribute
|
||||
#define g_macro__has_attribute __has_attribute
|
||||
#else
|
||||
#define g_macro__has_attribute(x) 0
|
||||
#endif
|
||||
|
||||
#ifdef __has_feature
|
||||
#define g_macro__has_feature __has_feature
|
||||
#else
|
||||
@ -328,8 +369,7 @@
|
||||
*
|
||||
* Since: 2.18
|
||||
*/
|
||||
#if (!defined(__clang__) && G_GNUC_CHECK_VERSION(4, 3)) || \
|
||||
(defined(__clang__) && g_macro__has_attribute(__alloc_size__))
|
||||
#if g_macro__has_attribute(__alloc_size__)
|
||||
#define G_GNUC_ALLOC_SIZE(x) __attribute__((__alloc_size__(x)))
|
||||
#define G_GNUC_ALLOC_SIZE2(x,y) __attribute__((__alloc_size__(x,y)))
|
||||
#else
|
||||
@ -515,7 +555,8 @@
|
||||
* See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-no_005finstrument_005ffunction-function-attribute) for more details.
|
||||
*/
|
||||
|
||||
#if G_GNUC_CHECK_VERSION(2, 4)
|
||||
#if g_macro__has_attribute(__format__)
|
||||
|
||||
#if !defined (__clang__) && G_GNUC_CHECK_VERSION (4, 4)
|
||||
#define G_GNUC_PRINTF( format_idx, arg_idx ) \
|
||||
__attribute__((__format__ (gnu_printf, format_idx, arg_idx)))
|
||||
@ -533,31 +574,54 @@
|
||||
__attribute__((__format__ (__strftime__, format_idx, 0))) \
|
||||
GLIB_AVAILABLE_MACRO_IN_2_60
|
||||
#endif
|
||||
#define G_GNUC_FORMAT( arg_idx ) \
|
||||
__attribute__((__format_arg__ (arg_idx)))
|
||||
#define G_GNUC_NORETURN \
|
||||
__attribute__((__noreturn__))
|
||||
#define G_GNUC_CONST \
|
||||
__attribute__((__const__))
|
||||
#define G_GNUC_UNUSED \
|
||||
__attribute__((__unused__))
|
||||
#define G_GNUC_NO_INSTRUMENT \
|
||||
__attribute__((__no_instrument_function__))
|
||||
#else /* !__GNUC__ */
|
||||
|
||||
#else
|
||||
|
||||
#define G_GNUC_PRINTF( format_idx, arg_idx )
|
||||
#define G_GNUC_SCANF( format_idx, arg_idx )
|
||||
#define G_GNUC_STRFTIME( format_idx ) \
|
||||
GLIB_AVAILABLE_MACRO_IN_2_60
|
||||
|
||||
#endif
|
||||
|
||||
#if g_macro__has_attribute(__format_arg__)
|
||||
#define G_GNUC_FORMAT(arg_idx) \
|
||||
__attribute__ ((__format_arg__ (arg_idx)))
|
||||
#else
|
||||
#define G_GNUC_FORMAT( arg_idx )
|
||||
#endif
|
||||
|
||||
#if g_macro__has_attribute(__noreturn__)
|
||||
#define G_GNUC_NORETURN \
|
||||
__attribute__ ((__noreturn__))
|
||||
#else
|
||||
/* NOTE: MSVC has __declspec(noreturn) but unlike GCC __attribute__,
|
||||
* __declspec can only be placed at the start of the function prototype
|
||||
* and not at the end, so we can't use it without breaking API.
|
||||
*/
|
||||
#define G_GNUC_NORETURN
|
||||
#endif
|
||||
|
||||
#if g_macro__has_attribute(__const__)
|
||||
#define G_GNUC_CONST \
|
||||
__attribute__ ((__const__))
|
||||
#else
|
||||
#define G_GNUC_CONST
|
||||
#endif
|
||||
|
||||
#if g_macro__has_attribute(__unused__)
|
||||
#define G_GNUC_UNUSED \
|
||||
__attribute__ ((__unused__))
|
||||
#else
|
||||
#define G_GNUC_UNUSED
|
||||
#endif
|
||||
|
||||
#if g_macro__has_attribute(__no_instrument_function__)
|
||||
#define G_GNUC_NO_INSTRUMENT \
|
||||
__attribute__ ((__no_instrument_function__))
|
||||
#else
|
||||
#define G_GNUC_NO_INSTRUMENT
|
||||
#endif /* !__GNUC__ */
|
||||
#endif
|
||||
|
||||
/**
|
||||
* G_GNUC_FALLTHROUGH:
|
||||
@ -587,16 +651,13 @@
|
||||
*
|
||||
* Since: 2.60
|
||||
*/
|
||||
#if G_GNUC_CHECK_VERSION(6, 0)
|
||||
#define G_GNUC_FALLTHROUGH __attribute__((fallthrough)) \
|
||||
GLIB_AVAILABLE_MACRO_IN_2_60
|
||||
#elif g_macro__has_attribute (fallthrough)
|
||||
#if g_macro__has_attribute(fallthrough)
|
||||
#define G_GNUC_FALLTHROUGH __attribute__((fallthrough)) \
|
||||
GLIB_AVAILABLE_MACRO_IN_2_60
|
||||
#else
|
||||
#define G_GNUC_FALLTHROUGH \
|
||||
GLIB_AVAILABLE_MACRO_IN_2_60
|
||||
#endif /* __GNUC__ */
|
||||
#endif
|
||||
|
||||
/**
|
||||
* G_GNUC_DEPRECATED:
|
||||
@ -616,7 +677,7 @@
|
||||
*
|
||||
* Since: 2.2
|
||||
*/
|
||||
#if G_GNUC_CHECK_VERSION(3, 1) || defined(__clang__)
|
||||
#if g_macro__has_attribute(__deprecated__)
|
||||
#define G_GNUC_DEPRECATED __attribute__((__deprecated__))
|
||||
#else
|
||||
#define G_GNUC_DEPRECATED
|
||||
@ -694,7 +755,7 @@
|
||||
*
|
||||
* Since: 2.14
|
||||
*/
|
||||
#if G_GNUC_CHECK_VERSION(3, 3)
|
||||
#if g_macro__has_attribute(may_alias)
|
||||
#define G_GNUC_MAY_ALIAS __attribute__((may_alias))
|
||||
#else
|
||||
#define G_GNUC_MAY_ALIAS
|
||||
@ -718,7 +779,7 @@
|
||||
*
|
||||
* Since: 2.10
|
||||
*/
|
||||
#if G_GNUC_CHECK_VERSION(3, 4)
|
||||
#if g_macro__has_attribute(warn_unused_result)
|
||||
#define G_GNUC_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
|
||||
#else
|
||||
#define G_GNUC_WARN_UNUSED_RESULT
|
||||
|
||||
Loading…
Reference in New Issue
Block a user