Make improvements

- Introduce portable sched_getcpu() api
- Support GCC's __target_clones__ feature
- Make fma() go faster on x86 in default mode
- Remove some asan checks from core libraries
- WinMain() now ensures $HOME and $USER are defined

examples/unbourne.c

@@ -2569,8 +2569,7 @@ static int shlex() {
       case 'y':
       case 'z':
         p = buf;
-        while (buf++, is_in_name(*buf))
-          ;
+        while (buf++, is_in_name(*buf));
         yylval.name = stalloc(buf - p + 1);
         *(char *)mempcpy(yylval.name, p, buf - p) = 0;
         value = ARITH_VAR;
@@ -2994,7 +2993,7 @@ static const char *updatepwd(const char *dir) {
   lim = (char *)stackblock() + 1;
   if (*dir != '/') {
     if (new[-1] != '/') USTPUTC('/', new);
-    if (new > lim &&*lim == '/') lim++;
+    if (new > lim && *lim == '/') lim++;
   } else {
     USTPUTC('/', new);
     cdcomppath++;
@@ -6565,6 +6564,10 @@ struct job *makejob(union node *node, int nprocs) {
   return jp;
 }
 
+#if defined(__GNUC__) && __GNUC__ >= 12
+#pragma GCC diagnostic ignored "-Wuse-after-free"
+#endif
+
 static struct job *growjobtab(void) {
   unsigned len;
   long offset;
@@ -7446,8 +7449,7 @@ static int ulimitcmd(int argc, char **argv) {
         what = optc;
     }
   }
-  for (l = limits; l->option != what; l++)
-    ;
+  for (l = limits; l->option != what; l++);
   set = *argptr ? 1 : 0;
   if (set) {
     char *p = *argptr;
@@ -7660,8 +7662,7 @@ static void setparam(char **argv) {
   char **newparam;
   char **ap;
   int nparam;
-  for (nparam = 0; argv[nparam]; nparam++)
-    ;
+  for (nparam = 0; argv[nparam]; nparam++);
   ap = newparam = ckmalloc((nparam + 1) * sizeof *ap);
   while (*argv) {
     *ap++ = savestr(*argv++);
@@ -7701,8 +7702,7 @@ static int shiftcmd(int argc, char **argv) {
     if (shellparam.malloc) ckfree(*ap1);
   }
   ap2 = shellparam.p;
-  while ((*ap2++ = *ap1++) != NULL)
-    ;
+  while ((*ap2++ = *ap1++) != NULL);
   shellparam.optind = 1;
   shellparam.optoff = -1;
   INTON;
@@ -8308,8 +8308,7 @@ static void parsefname(void) {
     if (heredoclist == NULL)
       heredoclist = here;
     else {
-      for (p = heredoclist; p->next; p = p->next)
-        ;
+      for (p = heredoclist; p->next; p = p->next);
       p->next = here;
     }
   } else if (n->type == NTOFD || n->type == NFROMFD) {
@@ -8432,8 +8431,7 @@ static int xxreadtoken(void) {
       case '\t':
         continue;
       case '#':
-        while ((c = pgetc()) != '\n' && c != PEOF)
-          ;
+        while ((c = pgetc()) != '\n' && c != PEOF);
         pungetc();
         continue;
       case '\n':
@@ -8553,7 +8551,7 @@ static int readtoken1(int firstc, char const *syntax, char *eofmark,
   quotef = 0;
   bqlist = NULL;
   STARTSTACKSTR(out);
-loop : {                   /* for each line, until end of word */
+loop: {                    /* for each line, until end of word */
   CHECKEND();              /* set c to PEOF if at end of here document */
   for (;;) {               /* until end of line or end of word */
     CHECKSTRSPACE(4, out); /* permit 4 calls to USTPUTC */
@@ -8701,7 +8699,7 @@ endword:
    * is called, c is set to the first character of the next input line.  If
    * we are at the end of the here document, this routine sets the c to PEOF.
    */
-checkend : {
+checkend: {
   if (realeofmark(eofmark)) {
     int markloc;
     char *p;
@@ -8742,7 +8740,7 @@ checkend : {
    * specifying the fd to be redirected.  The variable "c" contains the
    * first character of the redirection operator.
    */
-parseredir : {
+parseredir: {
   char fd = *out;
   union node *np;
   np = (union node *)stalloc(sizeof(struct nfile));
@@ -8798,7 +8796,7 @@ parseredir : {
    * Parse a substitution.  At this point, we have read the dollar sign
    * and nothing else.
    */
-parsesub : {
+parsesub: {
   int subtype;
   int typeloc;
   char *p;
@@ -8910,7 +8908,7 @@ parsesub : {
    * list of commands (passed by reference), and savelen is the number of
    * characters on the top of the stack which must be preserved.
    */
-parsebackq : {
+parsebackq: {
   struct nodelist **nlpp;
   union node *n;
   char *str;
@@ -9002,7 +9000,7 @@ parsebackq : {
 /*
  * Parse an arithmetic expansion (indicate start of one and set state)
  */
-parsearith : {
+parsearith: {
   synstack_push(&synstack, synstack->prev ?: alloca(sizeof(*synstack)),
                 ARISYNTAX);
   synstack->dblquote = 1;