https://developers.redhat.com/blog/2017/03/10/wimplicit-fallthrough-in-gcc-7/ Fixes the following warnings by annotating with a /* FALLTHRU */ comment. Unfortunately, the __attribute__ ((fallthrough)); approach does not appear to work with older compilers. ../cil/src/cil_parser.c: In function ‘cil_parser’: ../cil/src/cil_parser.c:253:14: warning: this statement may fall through [-Wimplicit-fallthrough=] tok.value = tok.value+1; ~~~~~~~~~~^~~~~~~~~~~~~ ../cil/src/cil_parser.c:254:3: note: here case SYMBOL: ^~~~ ../cil/src/cil_parser.c:275:7: warning: this statement may fall through [-Wimplicit-fallthrough=] if (tok.type != END_OF_FILE) { ^ ../cil/src/cil_parser.c:279:3: note: here case END_OF_FILE: ^~~~ ../cil/src/cil_post.c: In function ‘cil_post_fc_fill_data’: ../cil/src/cil_post.c:104:5: warning: this statement may fall through [-Wimplicit-fallthrough=] c++; ~^~ ../cil/src/cil_post.c:105:3: note: here default: ^~~~~~~ regex.c: In function ‘regex_format_error’: regex.c:541:10: warning: this statement may fall through [-Wimplicit-fallthrough=] *ptr++ = '.'; ~~~~~~~^~~~~ regex.c:542:2: note: here case 3: ^~~~ regex.c:543:10: warning: this statement may fall through [-Wimplicit-fallthrough=] *ptr++ = '.'; ~~~~~~~^~~~~ regex.c:544:2: note: here case 2: ^~~~ regex.c:545:10: warning: this statement may fall through [-Wimplicit-fallthrough=] *ptr++ = '.'; ~~~~~~~^~~~~ regex.c:546:2: note: here case 1: ^~~~ regex.c: In function ‘regex_format_error’: regex.c:541:10: warning: this statement may fall through [-Wimplicit-fallthrough=] *ptr++ = '.'; ~~~~~~~^~~~~ regex.c:542:2: note: here case 3: ^~~~ regex.c:543:10: warning: this statement may fall through [-Wimplicit-fallthrough=] *ptr++ = '.'; ~~~~~~~^~~~~ regex.c:544:2: note: here case 2: ^~~~ regex.c:545:10: warning: this statement may fall through [-Wimplicit-fallthrough=] *ptr++ = '.'; ~~~~~~~^~~~~ regex.c:546:2: note: here case 1: ^~~~ modules.c: In function ‘semanage_module_get_path’: modules.c:602:7: warning: this statement may fall through [-Wimplicit-fallthrough=] if (file == NULL) file = "hll"; ^ modules.c:603:3: note: here case SEMANAGE_MODULE_PATH_CIL: ^~~~ modules.c:604:7: warning: this statement may fall through [-Wimplicit-fallthrough=] if (file == NULL) file = "cil"; ^ modules.c:605:3: note: here case SEMANAGE_MODULE_PATH_LANG_EXT: ^~~~ Signed-off-by: Stephen Smalley <sds@xxxxxxxxxxxxx> --- libselinux/src/regex.c | 4 ++++ libsemanage/src/modules.c | 2 ++ libsepol/cil/src/cil_parser.c | 2 ++ libsepol/cil/src/cil_post.c | 1 + 4 files changed, 9 insertions(+) diff --git a/libselinux/src/regex.c b/libselinux/src/regex.c index 0c5ad27..ec1b0c4 100644 --- a/libselinux/src/regex.c +++ b/libselinux/src/regex.c @@ -539,12 +539,16 @@ truncated: /* no break statements, fall-through is intended */ case 4: *ptr++ = '.'; + /* FALLTHRU */ case 3: *ptr++ = '.'; + /* FALLTHRU */ case 2: *ptr++ = '.'; + /* FALLTHRU */ case 1: *ptr++ = '\0'; + /* FALLTHRU */ default: break; } diff --git a/libsemanage/src/modules.c b/libsemanage/src/modules.c index 90c5e49..62af101 100644 --- a/libsemanage/src/modules.c +++ b/libsemanage/src/modules.c @@ -600,8 +600,10 @@ int semanage_module_get_path(semanage_handle_t *sh, break; case SEMANAGE_MODULE_PATH_HLL: if (file == NULL) file = "hll"; + /* FALLTHRU */ case SEMANAGE_MODULE_PATH_CIL: if (file == NULL) file = "cil"; + /* FALLTHRU */ case SEMANAGE_MODULE_PATH_LANG_EXT: if (file == NULL) file = "lang_ext"; diff --git a/libsepol/cil/src/cil_parser.c b/libsepol/cil/src/cil_parser.c index 101520c..585ea77 100644 --- a/libsepol/cil/src/cil_parser.c +++ b/libsepol/cil/src/cil_parser.c @@ -251,6 +251,7 @@ int cil_parser(char *_path, char *buffer, uint32_t size, struct cil_tree **parse case QSTRING: tok.value[strlen(tok.value) - 1] = '\0'; tok.value = tok.value+1; + /* FALLTHRU */ case SYMBOL: if (paren_count == 0) { cil_log(CIL_ERR, "Symbol not inside parenthesis at line %d of %s\n", tok.line, path); @@ -275,6 +276,7 @@ int cil_parser(char *_path, char *buffer, uint32_t size, struct cil_tree **parse if (tok.type != END_OF_FILE) { break; } + /* FALLTHRU */ // Fall through if EOF case END_OF_FILE: if (paren_count > 0) { diff --git a/libsepol/cil/src/cil_post.c b/libsepol/cil/src/cil_post.c index 0d494ea..ad073e8 100644 --- a/libsepol/cil/src/cil_post.c +++ b/libsepol/cil/src/cil_post.c @@ -102,6 +102,7 @@ void cil_post_fc_fill_data(struct fc_data *fc, char *path) break; case '\\': c++; + /* FALLTHRU */ default: if (!fc->meta) { fc->stem_len++; -- 2.9.4
