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build: wrap "fallthrough" attr

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This generates a warning on gcc versions before 7.0.

Signed-off-by: David Lamparter <equinox@diac24.net>
This commit is contained in:
David Lamparter 2018-08-15 05:49:29 +02:00
parent 5ab5e410d0
commit bd27ea43e9
2 changed files with 10 additions and 1 deletions
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9
lib/compiler.h
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@ -24,6 +24,9 @@
#if __clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 5)
# define _RET_NONNULL , returns_nonnull
#endif
#if __has_attribute(fallthrough)
# define _FALLTHROUGH __attribute__((fallthrough));
#endif
# define _CONSTRUCTOR(x) constructor(x)
#elif defined(__GNUC__)
#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 9)
@ -34,6 +37,9 @@
# define _DESTRUCTOR(x) destructor(x)
# define _ALLOC_SIZE(x) alloc_size(x)
#endif
#if __GNUC__ >= 7
# define _FALLTHROUGH __attribute__((fallthrough));
#endif
#endif
#ifdef __sun
@ -55,6 +61,9 @@
#ifndef _ALLOC_SIZE
# define _ALLOC_SIZE(x)
#endif
#ifndef _FALLTHROUGH
#define _FALLTHROUGH
#endif
/*
* for warnings on macros, put in the macro content like this:

2
tests/bgpd/test_capability.c
View File

@ -821,7 +821,7 @@ static void parse_test(struct peer *peer, struct test_segment *t, int type)
switch (type) {
case CAPABILITY:
len += 2; /* to cover the OPT-Param header */
__attribute__ ((fallthrough));
_FALLTHROUGH
case OPT_PARAM:
printf("len: %u\n", len);
/* peek_for_as4 wants getp at capibility*/