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Define a new __GNUC_PREREQ__(maj, min) to test if we have a specific

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version of GCC or later and use it where appropriate.  It makes this
file more readable.

Obtained from:	OpenBSD
This commit is contained in:
mux 2003-09-30 20:34:57 +00:00
parent 603a67c9fe
commit 17b036038d
1 changed files with 16 additions and 6 deletions
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22
sys/sys/cdefs.h
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@ -48,6 +48,16 @@
#define __END_DECLS
#endif
/*
* Macro to test if we're using a specific version of gcc or later.
*/
#ifdef __GNUC__
#define __GNUC_PREREQ__(ma, mi) \
((__GNUC__ > (ma)) || (__GNUC__ == (ma) && __GNUC_MINOR__ >= (mi)))
#else
#define __GNUC_PREREQ__(ma, mi) 0
#endif
/*
* The __CONCAT macro is used to concatenate parts of symbol names, e.g.
* with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
@ -122,7 +132,7 @@
#define __aligned(x)
#define __section(x)
#else
#if __GNUC__ < 2 || __GNUC__ == 2 && __GNUC_MINOR__ < 5
#if !__GNUC_PREREQ__(2, 5)
#define __dead2
#define __pure2
#define __unused
@ -133,7 +143,7 @@
#define __unused
/* XXX Find out what to do for __packed, __aligned and __section */
#endif
#if __GNUC__ == 2 && __GNUC_MINOR__ >= 7 || __GNUC__ == 3
#if __GNUC_PREREQ__(2, 7)
#define __dead2 __attribute__((__noreturn__))
#define __pure2 __attribute__((__const__))
#define __unused __attribute__((__unused__))
@ -143,20 +153,20 @@
#endif
#endif
#if (__GNUC__ == 3 && __GNUC_MINOR__ >= 1) || __GNUC__ >= 4
#if __GNUC_PREREQ__(3, 1)
#define __always_inline __attribute__((__always_inline__))
#else
#define __always_inline
#endif
#if (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) || __GNUC__ >= 4
#if __GNUC_PREREQ__(3, 3)
#define __nonnull(x) __attribute__((__nonnull__(x)))
#else
#define __nonnull(x)
#endif
/* XXX: should use `#if __STDC_VERSION__ < 199901'. */
#if !(__GNUC__ == 2 && __GNUC_MINOR__ >= 7 || __GNUC__ >= 3)
#if !__GNUC_PREREQ__(2, 7)
#define __func__ NULL
#endif
@ -190,7 +200,7 @@
* that are known to support the features properly (old versions of gcc-2
* didn't permit keeping the keywords out of the application namespace).
*/
#if __GNUC__ < 2 || __GNUC__ == 2 && __GNUC_MINOR__ < 7
#if !__GNUC_PREREQ__(2, 7)
#define __printflike(fmtarg, firstvararg)
#define __scanflike(fmtarg, firstvararg)
#else