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MINOR: compiler: add a new macro to set an attribute on an enum when possible

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Gcc 6 and above support placing an attribute on an enum's value. This
is convenient for marking some values as deprecated. We just need the
macro because older versions fail to parse __attribute__() there.
This commit is contained in:
Willy Tarreau 2022-05-09 19:45:06 +02:00
parent 444d702130
commit 4fc2cd7c8e
1 changed files with 8 additions and 0 deletions
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8
include/haproxy/compiler.h
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@ -207,6 +207,14 @@
})
#endif
/* From gcc 6 and above, enum values may have attributes */
#if __GNUC_PREREQ__(6, 0)
#define ENUM_ATTRIBUTE(x) __attribute__(x)
#else
#define ENUM_ATTRIBUTE(x)
#endif
/* Some architectures have a double-word CAS, sometimes even dual-8 bytes.
* Some architectures support unaligned accesses, others are fine with them
* but only for non-atomic operations. Also mention those supporting unaligned