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macros: verify if __alloc_size__ works with clang

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So we can avoid using using an attribute not supported for the compiler.

warning:
../spice-common/common/mem.h:91:80: warning: unknown attribute
'__alloc_size__' ignored [-Wunknown-attributes]

void *spice_malloc0_n(size_t n_blocks, size_t n_block_bytes)
SPICE_GNUC_MALLOC SPICE_GNUC_ALLOC_SIZE2(1,2);

../spice-common/spice-protocol/spice/macros.h:52:52: note: expanded
from macro 'SPICE_GNUC_ALLOC_SIZE2'

 #define SPICE_GNUC_ALLOC_SIZE2(x,y) __attribute__((__alloc_size__(x,y)))
                                                    ^
This commit is contained in:
Victor Toso 2015-08-14 18:24:22 +02:00 committed by Frediano Ziglio
parent 2cd036e9d4
commit fa19ebb83f
1 changed files with 2 additions and 1 deletions
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3
spice/macros.h
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@ -47,7 +47,8 @@
#define SPICE_GNUC_NULL_TERMINATED
#endif
#if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
#if (!defined(__clang__) && ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))) || \
(defined(__clang__) && __has_feature(__alloc_size__))
#define SPICE_GNUC_ALLOC_SIZE(x) __attribute__((__alloc_size__(x)))
#define SPICE_GNUC_ALLOC_SIZE2(x,y) __attribute__((__alloc_size__(x,y)))
#else