syslogd,logger: code shrink for musl

function                                             old     new   delta
syslogd_main                                        1252    1910    +658
logger_main                                          277     393    +116
timestamp_and_log                                    434     542    +108
static.__compound_literal                              -     104    +104
parse_fac_prio_20                                    137       -    -137
pencode                                              167       -    -167
parse_syslogdcfg                                     715       -    -715
------------------------------------------------------------------------------
(add/remove: 1/3 grow/shrink: 3/0 up/down: 986/-1019)         Total: -33 bytes
   text	   data	    bss	    dec	    hex	filename
 912506	    563	   6132	 919201	  e06a1	busybox_old
 912364	    563	   6132	 919059	  e0613	busybox_unstripped

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

1 files changed, 11 insertions, 0 deletions

diff --git a/sysklogd/syslogd_and_logger.c b/sysklogd/syslogd_and_logger.c
index 6458a9332..6d06a718b 100644
--- a/sysklogd/syslogd_and_logger.c
+++ b/sysklogd/syslogd_and_logger.c
@@ -43,6 +43,17 @@ typedef struct _code {
  */
 #endif
 
+/* musl decided to be funny and it implements these as giant defines
+ * of the form: ((CODE *)(const CODE []){ ... })
+ * Which works, but causes _every_ function using them
+ * to have a copy on stack (at least with gcc-6.3.0).
+ * If we reference them just once, this saves 150 bytes.
+ * The pointers themselves are optimized out
+ * (no size change on uclibc).
+ */
+static const CODE *const bb_prioritynames = prioritynames;
+static const CODE *const bb_facilitynames = facilitynames;
+
 #if ENABLE_SYSLOGD
 #include "syslogd.c"
 #endif