silence all gcc warnings

libc/charstod.c

@@ -8,7 +8,7 @@
  * necessary to back up the input stream up one byte after calling charstod.
  */
 
-#define ADVANCE *s++ = c; if(s>=e) return NaN(); c = (*f)(vp)
+#define ADVANCE *s++ = c; if(s>=e) return __NaN(); c = (*f)(vp)
 
 double
 charstod(int(*f)(void*), void *vp)
@@ -45,34 +45,34 @@ charstod(int(*f)(void*), void *vp)
 	}else if(s == start && (c == 'i' || c == 'I')){
 		ADVANCE;
 		if(c != 'n' && c != 'N')
-			return NaN();
+			return __NaN();
 		ADVANCE;
 		if(c != 'f' && c != 'F')
-			return NaN();
+			return __NaN();
 		ADVANCE;
 		if(c != 'i' && c != 'I')
-			return NaN();
+			return __NaN();
 		ADVANCE;
 		if(c != 'n' && c != 'N')
-			return NaN();
+			return __NaN();
 		ADVANCE;
 		if(c != 'i' && c != 'I')
-			return NaN();
+			return __NaN();
 		ADVANCE;
 		if(c != 't' && c != 'T')
-			return NaN();
+			return __NaN();
 		ADVANCE;
 		if(c != 'y' && c != 'Y')
-			return NaN();
+			return __NaN();
 		ADVANCE;  /* so caller can back up uniformly */
 		USED(c);
 	}else if(s == str && (c == 'n' || c == 'N')){
 		ADVANCE;
 		if(c != 'a' && c != 'A')
-			return NaN();
+			return __NaN();
 		ADVANCE;
 		if(c != 'n' && c != 'N')
-			return NaN();
+			return __NaN();
 		ADVANCE;  /* so caller can back up uniformly */
 		USED(c);
 	}

libc/lock.c

@@ -22,7 +22,7 @@ lock(Lock *lk)
 			return;
 
 	for(i=0; i<100; i++) {
-		osyield(0);
+		osyield();
 		if(canlock(lk))
 			return;
 	}

libc/strtod.c

@@ -521,7 +521,7 @@ xcmp(char *a, char *b)
 {
 	int c1, c2;
 
-	while(c1 = *b++) {
+	while((c1 = *b++)) {
 		c2 = *a++;
 		if(isupper(c2))
 			c2 = tolower(c2);

libc/utfutf.c

@@ -19,7 +19,7 @@ utfutf(char *s1, char *s2)
 		return strstr(s1, s2);
 
 	n2 = strlen(s2);
-	for(p=s1; p=utfrune(p, f); p+=n1)
+	for(p=s1; (p=utfrune(p, f)); p+=n1)
 		if(strncmp(p, s2, n2) == 0)
 			return p;
 	return 0;