[LU-15492] Fix fallthrough decorator to use attribute((fallthrough)) for gcc 7

Tue, 5 Jul 2022 22:54:50 +0000

Using the new fallthrough macro, building on openSUSE 15 with gcc-7.5

error: this statement may fall through [-Werror=implicit-fallthrough=]

Where the fallthrough attribute is available prefer it over a no-op suppression of
the implicit fallthrough warning.

Ex:

# if defined(__GNUC__) && __GNUC__ >= 7
#  define fallthrough  __attribute__((fallthrough)) /* fallthrough */
# else
#  define fallthrough do {} while (0)  /* fallthrough */
# endif

Whamcloud Community JIRA

[LU-15492] Fix fallthrough decorator to use __attribute__((fallthrough)) for gcc 7

[LU-15492] Fix fallthrough decorator to use attribute((fallthrough)) for gcc 7