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>

3 files changed, 3 insertions, 3 deletions

diff --git a/shell/ash.c b/shell/ash.c
index b835415b5..7d20b8860 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -9681,7 +9681,7 @@ preadfd(void)
                         }
 # if ENABLE_ASH_IDLE_TIMEOUT
                         else if (errno == EAGAIN && timeout > 0) {
-                                printf("\007timed out waiting for input: auto-logout\n");
+                                puts("\007timed out waiting for input: auto-logout");
                                 exitshell();
                         }
 # endif
diff --git a/shell/hush.c b/shell/hush.c
index bccd9c1e9..f085ed3eb 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -6794,7 +6794,7 @@ static int checkjobs(struct pipe *fg_pipe)
                                                 int sig = WTERMSIG(status);
                                                 if (i == fg_pipe->num_cmds-1)
                                                         /* TODO: use strsignal() instead for bash compat? but that's bloat... */
-                                                        printf("%s\n", sig == SIGINT || sig == SIGPIPE ? "" : get_signame(sig));
+                                                        puts(sig == SIGINT || sig == SIGPIPE ? "" : get_signame(sig));
                                                 /* TODO: if (WCOREDUMP(status)) + " (core dumped)"; */
                                                 /* TODO: MIPS has 128 sigs (1..128), what if sig==128 here?
                                                  * Maybe we need to use sig | 128? */
diff --git a/shell/shell_common.c b/shell/shell_common.c
index 2b6f7dc92..8c9607c8c 100644
--- a/shell/shell_common.c
+++ b/shell/shell_common.c
@@ -380,7 +380,7 @@ static void printlim(unsigned opts, const struct rlimit *limit,
                 val = limit->rlim_cur;
 
         if (val == RLIM_INFINITY)
-                printf("unlimited\n");
+                puts("unlimited");
         else {
                 val >>= l->factor_shift;
                 printf("%llu\n", (long long) val);