Cygwin: C++17: register keyword is deprecated

The register keyword was already deprecated with C++11, but
with C++17 it has been entirely removed.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

winsup/cygserver/sysv_msg.cc

@@ -359,7 +359,7 @@ msgctl(struct thread *td, struct msgctl_args *uap)
 	struct msqid_ds *user_msqptr = uap->buf;
 	int rval, error;
 	struct msqid_ds msqbuf;
-	register struct msqid_ds *msqptr;
+	struct msqid_ds *msqptr;
 
 	DPRINTF(("call to msgctl(%d, %d, 0x%x)\n", msqid, cmd, user_msqptr));
 
@@ -516,7 +516,7 @@ msgget(struct thread *td, struct msgget_args *uap)
 	int msqid, error = 0;
 	key_t key = uap->key;
 	unsigned msgflg = uap->msgflg;
-	register struct msqid_ds *msqptr = NULL;
+	struct msqid_ds *msqptr = NULL;
 
 	DPRINTF(("msgget(0x%x, 0%o)\n", key, msgflg));
 
@@ -629,8 +629,8 @@ msgsnd(struct thread *td, struct msgsnd_args *uap)
 	size_t msgsz = uap->msgsz;
 	int msgflg = uap->msgflg;
 	int segs_needed, error = 0;
-	register struct msqid_ds *msqptr;
-	register struct msg *msghdr;
+	struct msqid_ds *msqptr;
+	struct msg *msghdr;
 	short next;
 
 	DPRINTF(("call to msgsnd(%d, 0x%x, %d, %d)\n", msqid, user_msgp, msgsz,
@@ -943,8 +943,8 @@ msgrcv(struct thread *td, struct msgrcv_args *uap)
 	long msgtyp = uap->msgtyp;
 	int msgflg = uap->msgflg;
 	size_t len;
-	register struct msqid_ds *msqptr;
-	register struct msg *msghdr;
+	struct msqid_ds *msqptr;
+	struct msg *msghdr;
 	int error = 0;
 	short next;
 

winsup/cygwin/cpuid.h

@@ -20,9 +20,9 @@ cpuid (uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d, uint32_t ain,
 
 #ifdef __x86_64__
 static inline bool __attribute ((always_inline))
-can_set_flag (register uint32_t long flag)
+can_set_flag (uint32_t long flag)
 {
-  register uint32_t long r1, r2;
+  uint32_t long r1, r2;
 
   asm volatile ("pushfq\n"
 		"popq %0\n"
@@ -41,9 +41,9 @@ can_set_flag (register uint32_t long flag)
 }
 #else
 static inline bool __attribute ((always_inline))
-can_set_flag (register uint32_t flag)
+can_set_flag (uint32_t flag)
 {
-  register uint32_t r1, r2;
+  uint32_t r1, r2;
 
   asm volatile ("pushfl\n"
 		"popl %0\n"

winsup/cygwin/environ.cc

@@ -482,8 +482,8 @@ posify_maybe (char **here, const char *value, char *outenv)
 static char *
 my_findenv (const char *name, int *offset)
 {
-  register int len;
-  register char **p;
+  int len;
+  char **p;
   const char *c;
 
   if (cur_environ () == NULL)
@@ -706,7 +706,7 @@ setenv (const char *name, const char *value, int overwrite)
 extern "C" int
 unsetenv (const char *name)
 {
-  register char **e;
+  char **e;
   int offset;
 
   __try

winsup/cygwin/mount.cc

@@ -997,7 +997,7 @@ find_ws (char *in)
 inline char *
 conv_fstab_spaces (char *field)
 {
-  register char *sp = field;
+  char *sp = field;
   while ((sp = strstr (sp, "\\040")) != NULL)
     {
       *sp++ = ' ';

winsup/cygwin/strfuncs.cc

@@ -890,7 +890,7 @@ RtlInt64ToHexUnicodeString (ULONGLONG value, PUNICODE_STRING dest,
   if (dest->MaximumLength - len < 16 * (int) sizeof (WCHAR))
     return STATUS_BUFFER_OVERFLOW;
   wchar_t *end = (PWCHAR) ((PBYTE) dest->Buffer + len);
-  register PWCHAR p = end + 16;
+  PWCHAR p = end + 16;
   while (p-- > end)
     {
       *p = hex_wchars[value & 0xf];

winsup/cygwin/string.h

@@ -32,7 +32,7 @@ extern const char isalpha_array[];
 static inline int
 ascii_strcasematch (const char *cs, const char *ct)
 {
-  register const unsigned char *us, *ut;
+  const unsigned char *us, *ut;
 
   us = (const unsigned char *) cs;
   ut = (const unsigned char *) ct;
@@ -49,7 +49,7 @@ ascii_strcasematch (const char *cs, const char *ct)
 static inline int
 ascii_strncasematch (const char *cs, const char *ct, size_t n)
 {
-  register const unsigned char *us, *ut;
+  const unsigned char *us, *ut;
 
   if (!n)
    return 1;

winsup/cygwin/strsep.cc

@@ -35,9 +35,9 @@ extern "C" char *
 strsep (char **stringp,
 	 const char *delim)
 {
-	register char *s;
-	register const char *spanp;
-	register int c, sc;
+	char *s;
+	const char *spanp;
+	int c, sc;
 	char *tok;
 
 	if ((s = *stringp) == NULL)

winsup/utils/path.cc

@@ -283,7 +283,7 @@ find_ws (char *in)
 inline char *
 conv_fstab_spaces (char *field)
 {
-  register char *sp = field;
+  char *sp = field;
   while ((sp = strstr (sp, "\\040")) != NULL)
     {
       *sp++ = ' ';