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| author | Luiz Capitulino <lcapitulino@gmail.com> | 2011-07-11 14:24:44 -0300 |
|---|---|---|
| committer | Luiz Capitulino <lcapitulino@gmail.com> | 2011-07-21 16:48:13 -0300 |
| commit | 5c0263204da1870243107acd6c73b21f2e7b78f0 (patch) | |
| tree | fc830789faac741efed0b20412fb59edf0614303 /compiler.h | |
| parent | d967b2f14f238c24264fa73d02e9b0dde0b19506 (diff) | |
Introduce compiler.h header file
This moves compiler related macros from qemu-common.h to compiler.h.
The reason for this change is that there are simple header files that
depend only on the compiler macros, so including qemu-common.h is overkill.
Besides, qemu-common.h is bloated and will benefit from some splitting.
Please, also note that the QEMU_BUILD_BUG_ON() macro is being fixed to
not use double underscores as a prefix and the license text was added
by Vassili Karpov (malc), who is one of the authors of the new file.
Signed-off-by: Luiz Capitulino <lcapitulino@gmail.com>
Diffstat (limited to 'compiler.h')
| -rw-r--r-- | compiler.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/compiler.h b/compiler.h new file mode 100644 index 0000000000..9af5dc6c91 --- /dev/null +++ b/compiler.h @@ -0,0 +1,34 @@ +/* public domain */ + +#ifndef COMPILER_H +#define COMPILER_H + +#include "config-host.h" + +#define QEMU_NORETURN __attribute__ ((__noreturn__)) +#ifdef CONFIG_GCC_ATTRIBUTE_WARN_UNUSED_RESULT +#define QEMU_WARN_UNUSED_RESULT __attribute__((warn_unused_result)) +#else +#define QEMU_WARN_UNUSED_RESULT +#endif + +#define QEMU_BUILD_BUG_ON(x) \ + typedef char qemu_build_bug_on__##__LINE__[(x)?-1:1]; + +#if defined __GNUC__ +# if (__GNUC__ < 4) || \ + defined(__GNUC_MINOR__) && (__GNUC__ == 4) && (__GNUC_MINOR__ < 4) + /* gcc versions before 4.4.x don't support gnu_printf, so use printf. */ +# define GCC_ATTR __attribute__((__unused__, format(printf, 1, 2))) +# define GCC_FMT_ATTR(n, m) __attribute__((format(printf, n, m))) +# else + /* Use gnu_printf when supported (qemu uses standard format strings). */ +# define GCC_ATTR __attribute__((__unused__, format(gnu_printf, 1, 2))) +# define GCC_FMT_ATTR(n, m) __attribute__((format(gnu_printf, n, m))) +# endif +#else +#define GCC_ATTR /**/ +#define GCC_FMT_ATTR(n, m) +#endif + +#endif /* COMPILER_H */ |