Define strstr.

From-SVN: r9696

gcc/collect2.c

@@ -363,6 +363,30 @@ my_strerror (e)
   return buffer;
 #endif
 }
+
+#ifndef POSIX
+char *
+strstr (s1, s2)
+  char *s1, *s2;
+{
+  register char *p = s1;
+  extern char *strchr ();
+  extern int strncmp ();
+#if __GNUC__==2
+  extern __SIZE_TYPE__ strlen ();
+#endif
+  register int len = strlen (s2);
+
+  for (; (p = strchr (p, *s2)) != 0; p++)
+    {
+      if (strncmp (p, s2, len) == 0)
+	{
+	  return (p);
+	}
+    }
+  return (0);
+}
+#endif
 
 /* Delete tempfiles and exit function.  */