Merge pull request #5166 from keszybz/gcc7

Fixes for gcc 7 and new µhttpd & glibc warnings

src/basic/MurmurHash2.c

@@ -69,9 +69,9 @@ uint32_t MurmurHash2 ( const void * key, int len, uint32_t seed )
 
   switch(len)
   {
-  case 3: h ^= data[2] << 16;
-  case 2: h ^= data[1] << 8;
-  case 1: h ^= data[0];
+  case 3: h ^= data[2] << 16; /* fall through */
+  case 2: h ^= data[1] << 8;  /* fall through */
+  case 1: h ^= data[0];       /* fall through */
       h *= m;
   };
 

src/basic/nss-util.h

@@ -27,6 +27,10 @@
 
 #define NSS_SIGNALS_BLOCK SIGALRM,SIGVTALRM,SIGPIPE,SIGCHLD,SIGTSTP,SIGIO,SIGHUP,SIGUSR1,SIGUSR2,SIGPROF,SIGURG,SIGWINCH
 
+#ifndef DEPRECATED_RES_USE_INET6
+#  define DEPRECATED_RES_USE_INET6 0x00002000
+#endif
+
 #define NSS_GETHOSTBYNAME_PROTOTYPES(module)            \
 enum nss_status _nss_##module##_gethostbyname4_r(       \
                 const char *name,                       \
@@ -92,7 +96,7 @@ enum nss_status _nss_##module##_gethostbyname_r(        \
                 int *errnop, int *h_errnop) {           \
         enum nss_status ret = NSS_STATUS_NOTFOUND;      \
                                                         \
-        if (_res.options & RES_USE_INET6)               \
+        if (_res.options & DEPRECATED_RES_USE_INET6)    \
                 ret = _nss_##module##_gethostbyname3_r( \
                         name,                           \
                         AF_INET6,                       \

src/basic/siphash24.c

@@ -127,18 +127,25 @@ void siphash24_compress(const void *_in, size_t inlen, struct siphash *state) {
         switch (left) {
                 case 7:
                         state->padding |= ((uint64_t) in[6]) << 48;
+                        /* fall through */
                 case 6:
                         state->padding |= ((uint64_t) in[5]) << 40;
+                        /* fall through */
                 case 5:
                         state->padding |= ((uint64_t) in[4]) << 32;
+                        /* fall through */
                 case 4:
                         state->padding |= ((uint64_t) in[3]) << 24;
+                        /* fall through */
                 case 3:
                         state->padding |= ((uint64_t) in[2]) << 16;
+                        /* fall through */
                 case 2:
                         state->padding |= ((uint64_t) in[1]) <<  8;
+                        /* fall through */
                 case 1:
                         state->padding |= ((uint64_t) in[0]);
+                        /* fall through */
                 case 0:
                         break;
         }

src/basic/time-util.c

@@ -1271,7 +1271,7 @@ bool clock_supported(clockid_t clock) {
                 if (!clock_boottime_supported())
                         return false;
 
-                /* fall through, after checking the cached value for CLOCK_BOOTTIME. */
+                /* fall through */
 
         default:
                 /* For everything else, check properly */