mirror of
https://github.com/qemu/qemu.git
synced 2025-10-31 04:06:46 +00:00
87751797c7
The code which tests whether gcc supports warn_unused_result was wrong. Remove the wrong test from configure and replace it by code using macro QEMU_GNUC_PREREQ in compiler.h. Signed-off-by: Stefan Weil <weil@mail.berlios.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
/* public domain */
|
|
|
|
#ifndef COMPILER_H
|
|
#define COMPILER_H
|
|
|
|
#include "config-host.h"
|
|
|
|
/*----------------------------------------------------------------------------
|
|
| The macro QEMU_GNUC_PREREQ tests for minimum version of the GNU C compiler.
|
|
| The code is a copy of SOFTFLOAT_GNUC_PREREQ, see softfloat-macros.h.
|
|
*----------------------------------------------------------------------------*/
|
|
#if defined(__GNUC__) && defined(__GNUC_MINOR__)
|
|
# define QEMU_GNUC_PREREQ(maj, min) \
|
|
((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
|
|
#else
|
|
# define QEMU_GNUC_PREREQ(maj, min) 0
|
|
#endif
|
|
|
|
#define QEMU_NORETURN __attribute__ ((__noreturn__))
|
|
|
|
#if QEMU_GNUC_PREREQ(3, 4)
|
|
#define QEMU_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
|
|
#else
|
|
#define QEMU_WARN_UNUSED_RESULT
|
|
#endif
|
|
|
|
#if defined(_WIN32)
|
|
# define QEMU_PACKED __attribute__((gcc_struct, packed))
|
|
#else
|
|
# define QEMU_PACKED __attribute__((packed))
|
|
#endif
|
|
|
|
#define QEMU_BUILD_BUG_ON(x) \
|
|
typedef char qemu_build_bug_on__##__LINE__[(x)?-1:1];
|
|
|
|
#if defined __GNUC__
|
|
# if !QEMU_GNUC_PREREQ(4, 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 */
|