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lib:replace: Add FALL_THROUGH support

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Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This commit is contained in:
Andreas Schneider 2017-07-26 16:33:10 +02:00 committed by Andrew Bartlett
parent 76535df324
commit 05dae361b3
3 changed files with 46 additions and 0 deletions
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1
.ycm_extra_conf.py
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@ -47,6 +47,7 @@ flags = [
'-D_XOPEN_SOURCE_EXTENDED=1',
'-DAD_DC_BUILD_IS_ENABLED=1',
'-DHAVE_IPV6=1',
'-DFALL_THROUGH',
'-I/usr/local/include',
'-I.',
'-Iauth',

9
lib/replace/replace.h
View File

@ -922,6 +922,15 @@ void rep_setproctitle(const char *fmt, ...) PRINTF_ATTRIBUTE(1, 2);
#define setproctitle_init rep_setproctitle_init
void rep_setproctitle_init(int argc, char *argv[], char *envp[]);
#endif
#ifndef FALL_THROUGH
# ifdef HAVE_FALLTHROUGH_ATTRIBUTE
# define FALL_THROUGH __attribute__ ((fallthrough))
# else /* HAVE_FALLTHROUGH_ATTRIBUTE */
# define FALL_THROUGH ((void)0)
# endif /* HAVE_FALLTHROUGH_ATTRIBUTE */
#endif /* FALL_THROUGH */
bool nss_wrapper_enabled(void);
bool nss_wrapper_hosts_enabled(void);
bool socket_wrapper_enabled(void);

36
lib/replace/wscript
View File

@ -249,6 +249,42 @@ def configure(conf):
headers='stdint.h sys/atomic.h',
msg='Checking for atomic_add_32 compiler builtin')
conf.CHECK_CODE('''
#define FALL_THROUGH __attribute__((fallthrough))
enum direction_e {
UP = 0,
DOWN,
};
int main(void) {
enum direction_e key = UP;
int i = 10;
int j = 0;
switch (key) {
case UP:
i = 5;
FALL_THROUGH;
case DOWN:
j = i * 2;
break;
default:
break;
}
if (j < i) {
return 1;
}
return 0;
}
''',
'HAVE_FALLTHROUGH_ATTRIBUTE',
addmain=False,
cflags='-Werror',
msg='Checking for fallthrough attribute')
# these may be builtins, so we need the link=False strategy
conf.CHECK_FUNCS('strdup memmem printf memset memcpy memmove strcpy strncpy bzero', link=False)