diff options
Diffstat (limited to 'compiler.h')
| -rw-r--r-- | compiler.h | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/compiler.h b/compiler.h index a2d5959e4b..3a9b8a174b 100644 --- a/compiler.h +++ b/compiler.h @@ -5,7 +5,19 @@ #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__)) + #ifdef CONFIG_GCC_ATTRIBUTE_WARN_UNUSED_RESULT #define QEMU_WARN_UNUSED_RESULT __attribute__((warn_unused_result)) #else @@ -22,8 +34,7 @@ typedef char qemu_build_bug_on__##__LINE__[(x)?-1:1]; #if defined __GNUC__ -# if (__GNUC__ < 4) || \ - defined(__GNUC_MINOR__) && (__GNUC__ == 4) && (__GNUC_MINOR__ < 4) +# 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))) |