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compiler.h: explicit case for Clang printf attribute

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Since commit efc6c07 ("configure: Add a test for the minimum compiler
version"), QEMU explicitely depends on GCC >= 4.8, we could thus drop
earlier version checks. Except clang advertizes itself as GCC 4.2.1.

Since clang doesn't support gnu_printf, make that case explicitely and
drop GCC version check.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20201210134752.780923-8-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Marc-André Lureau 2020-12-10 17:47:46 +04:00 committed by Paolo Bonzini
parent db5deef996
commit 28f86163a4
1 changed files with 12 additions and 12 deletions
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16
include/qemu/compiler.h
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@ -99,19 +99,19 @@
#define QEMU_BUILD_BUG_ON_ZERO(x) (sizeof(QEMU_BUILD_BUG_ON_STRUCT(x)) - \
sizeof(QEMU_BUILD_BUG_ON_STRUCT(x)))
#if defined __GNUC__
# if !QEMU_GNUC_PREREQ(4, 4)
/* gcc versions before 4.4.x don't support gnu_printf, so use printf. */
#if defined(__clang__)
/* clang doesn't support gnu_printf, so use printf. */
# define GCC_FMT_ATTR(n, m) __attribute__((format(printf, n, m)))
# else
/* Use gnu_printf when supported (qemu uses standard format strings). */
#elif defined(__GNUC__)
/* Use gnu_printf (qemu uses standard format strings). */
# define GCC_FMT_ATTR(n, m) __attribute__((format(gnu_printf, n, m)))
# if defined(_WIN32)
/* Map __printf__ to __gnu_printf__ because we want standard format strings
* even when MinGW or GLib include files use __printf__. */
/*
* Map __printf__ to __gnu_printf__ because we want standard format strings even
* when MinGW or GLib include files use __printf__.
*/
# define __printf__ __gnu_printf__
# endif
# endif
#else
#define GCC_FMT_ATTR(n, m)
#endif