build system: -fno-builtin-printf

Benefits are: drops reference to out-of-line putchar(), fixes a few cases
of failed string merge.

function                                             old     new   delta
i2cdump_main                                        1488    1502     +14
sha256_process_block64                               423     433     +10
sendmail_main                                       1183    1185      +2
list_table                                          1114    1116      +2
i2cdetect_main                                      1235    1237      +2
fdisk_main                                          2852    2854      +2
builtin_type                                         119     121      +2
unicode_conv_to_printable2                           325     324      -1
scan_recursive                                       380     378      -2
mkfs_minix_main                                     2687    2684      -3
buffer_fill_and_print                                178     169      -9
putchar                                              152       -    -152
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 7/4 up/down: 34/-167)          Total: -133 bytes
   text    data     bss     dec     hex filename
 937788     932   17676  956396   e97ec busybox_old
 937564     932   17676  956172   e970c busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

2 files changed, 3 insertions, 3 deletions

diff --git a/networking/arping.c b/networking/arping.c
index ce7fa299c..ef205e5e6 100644
--- a/networking/arping.c
+++ b/networking/arping.c
@@ -249,7 +249,7 @@ static void recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM)
                         unsigned diff = MONOTONIC_US() - last;
                         printf(" %u.%03ums\n", diff / 1000, diff % 1000);
                 } else {
-                        printf(" UNSOLICITED?\n");
+                        puts(" UNSOLICITED?");
                 }
                 fflush_all();
         }
diff --git a/networking/brctl.c b/networking/brctl.c
index 8043d600b..c01a86998 100644
--- a/networking/brctl.c
+++ b/networking/brctl.c
@@ -217,7 +217,7 @@ int brctl_main(int argc UNUSED_PARAM, char **argv)
                         arm_ioctl(args, BRCTL_GET_BRIDGES,
                                                 (unsigned long) bridx, MAX_PORTS);
                         num = xioctl(fd, SIOCGIFBR, args);
-                        printf("bridge name\tbridge id\t\tSTP enabled\tinterfaces\n");
+                        puts("bridge name\tbridge id\t\tSTP enabled\tinterfaces");
                         for (i = 0; i < num; i++) {
                                 char ifname[IFNAMSIZ];
                                 int j, tabs;
@@ -236,7 +236,7 @@ int brctl_main(int argc UNUSED_PARAM, char **argv)
                                 /* print bridge id */
                                 x = (unsigned char *) &bi.bridge_id;
                                 for (j = 0; j < 8; j++) {
-                                        printf("%.2x", x[j]);
+                                        printf("%02x", x[j]);
                                         if (j == 1)
                                                 bb_putchar('.');
                                 }