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>

1 files changed, 1 insertions, 1 deletions

diff --git a/mailutils/sendmail.c b/mailutils/sendmail.c
index 9455b4e7a..4355e4dc5 100644
--- a/mailutils/sendmail.c
+++ b/mailutils/sendmail.c
@@ -375,7 +375,7 @@ int sendmail_main(int argc UNUSED_PARAM, char **argv)
                         // N.B. we need to escape the leading dot regardless of
                         // whether it is single or not character on the line
                         if ('.' == s[0] /*&& '\0' == s[1] */)
-                                printf(".");
+                                bb_putchar('.');
                         // dump read line
                         send_r_n(s);
                         free(s);