remove bb_printf and the like

libbb/Kbuild

@@ -54,7 +54,6 @@ lib-$(CONFIG_DEVFSD) += xregcomp.o
 
 lib-y += messages.o
 lib-y += xfuncs.o
-lib-y += printf.o
 lib-y += xatol.o
 lib-y += safe_strtol.o
 lib-y += bb_pwd.o

libbb/fflush_stdout_and_exit.c

@@ -11,11 +11,9 @@
  * in an error state.
  */
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <libbb.h>
+#include "libbb.h"
 
-void bb_fflush_stdout_and_exit(int retval)
+void fflush_stdout_and_exit(int retval)
 {
 	if (fflush(stdout)) {
 		retval = xfunc_error_retval;

libbb/getopt32.c

@@ -143,7 +143,7 @@ const char *opt_complementary
         	while (my_b) { dosomething_with(my_b->data); my_b = my_b->link; }
         if (my_b)        // but llist is stored if -b is specified
         	free_llist(my_b);
-        if (verbose_level) bb_printf("verbose level is %d\n", verbose_level);
+        if (verbose_level) printf("verbose level is %d\n", verbose_level);
 
 Special characters:
 

libbb/xfuncs.c

@@ -130,7 +130,7 @@ off_t xlseek(int fd, off_t offset, int whence)
 }
 
 // Die with supplied error message if this FILE * has ferror set.
-void xferror(FILE *fp, const char *fn)
+void die_if_ferror(FILE *fp, const char *fn)
 {
 	if (ferror(fp)) {
 		bb_error_msg_and_die("%s", fn);
@@ -138,9 +138,9 @@ void xferror(FILE *fp, const char *fn)
 }
 
 // Die with an error message if stdout has ferror set.
-void xferror_stdout(void)
+void die_if_ferror_stdout(void)
 {
-	xferror(stdout, bb_msg_standard_output);
+	die_if_ferror(stdout, bb_msg_standard_output);
 }
 
 // Die with an error message if we have trouble flushing stdout.