rework long option handling. saves ~1.2k

function                                             old     new   delta
tar_longopts                                           -     222    +222
static.udhcpc_longopts                                 -     192    +192
start_stop_daemon_longopts                             -     150    +150
getopt32                                            1045    1185    +140
static.wget_longopts                                   -     111    +111
static.od_longopts                                     -     105    +105
getopt_longopts                                        -      96     +96
install_longopts                                       -      67     +67
ipcalc_longopts                                        -      63     +63
static.hwclock_longopts                                -      54     +54
ftpgetput_longopts                                     -      52     +52
static.dumpleases_longopts                             -      32     +32
env_longopts                                           -      31     +31
runparts_longopts                                      -      30     +30
mv_longopts                                            -      24     +24
mkdir_longopts                                         -      19     +19
find_pair                                            164     180     +16
bb_null_long_options                                   -      16     +16
setconsole_longopts                                    -      10     +10
display_speed                                         91      98      +7
collect_blk                                          467     474      +7
show_color                                             4       1      -3
ls_main                                              913     904      -9
bb_default_long_options                               16       -     -16
ls_color_opt                                          32      10     -22
setconsole_long_options                               32       -     -32
arith                                               2077    2030     -47
mv_long_options                                       48       -     -48
mkdir_long_options                                    48       -     -48
env_long_options                                      48       -     -48
static.options                                       248     184     -64
runparts_long_options                                 80       -     -80
ftpgetput_long_options                                96       -     -96
static.hwclock_long_options                          112       -    -112
install_long_options                                 112       -    -112
static.long_options                                  144       -    -144
static.wget_long_options                             160       -    -160
longopts                                             160       -    -160
static.arg_options                                   304       -    -304
tar_long_options                                     320       -    -320
long_options                                         384       -    -384
------------------------------------------------------------------------------
(add/remove: 17/15 grow/shrink: 4/5 up/down: 1444/-2209)     Total: -765 bytes
   text    data     bss     dec     hex filename
 782618    1328   11900  795846   c24c6 busybox_old
 781354    1328   11900  794582   c1fd6 busybox_unstripped

2 files changed, 21 insertions, 23 deletions

diff --git a/util-linux/getopt.c b/util-linux/getopt.c
index a5e6743..5ee13ec 100644
--- a/util-linux/getopt.c
+++ b/util-linux/getopt.c
@@ -266,18 +266,17 @@ static void set_shell(const char *new_shell)
  */
 
 #if ENABLE_GETOPT_LONG
-static const struct option longopts[] = {
-	{ "options",      required_argument, NULL, 'o' },
-	{ "longoptions",  required_argument, NULL, 'l' },
-	{ "quiet",        no_argument,       NULL, 'q' },
-	{ "quiet-output", no_argument,       NULL, 'Q' },
-	{ "shell",        required_argument, NULL, 's' },
-	{ "test",         no_argument,       NULL, 'T' },
-	{ "unquoted",     no_argument,       NULL, 'u' },
-	{ "alternative",  no_argument,       NULL, 'a' },
-	{ "name",         required_argument, NULL, 'n' },
-	{ NULL, 0, NULL, 0 }
-};
+static const char getopt_longopts[] =
+	"options\0"      Required_argument "o"
+	"longoptions\0"  Required_argument "l"
+	"quiet\0"        No_argument       "q"
+	"quiet-output\0" No_argument       "Q"
+	"shell\0"        Required_argument "s"
+	"test\0"         No_argument       "T"
+	"unquoted\0"     No_argument       "u"
+	"alternative\0"  No_argument       "a"
+	"name\0"         Required_argument "n"
+	"\0";
 #endif
 
 int getopt_main(int argc, char *argv[]);
@@ -317,7 +316,7 @@ int getopt_main(int argc, char *argv[])
 #if !ENABLE_GETOPT_LONG
 	opt = getopt32(argc, argv, "+o:n:qQs:Tu", &optstr, &name, &s_arg);
 #else
-	applet_long_options = longopts;
+	applet_long_options = getopt_longopts;
 	opt_complementary = "l::";
 	opt = getopt32(argc, argv, "+o:n:qQs:Tual:",
 					&optstr, &name, &s_arg, &l_arg);
diff --git a/util-linux/hwclock.c b/util-linux/hwclock.c
index 882a0c5..ff696a3 100644
--- a/util-linux/hwclock.c
+++ b/util-linux/hwclock.c
@@ -178,16 +178,15 @@ int hwclock_main(int argc, char **argv)
 	int utc;
 
 #if ENABLE_FEATURE_HWCLOCK_LONG_OPTIONS
-	static const struct option hwclock_long_options[] = {
-		{ "localtime", 0, 0, 'l' },
-		{ "utc",       0, 0, 'u' },
-		{ "show",      0, 0, 'r' },
-		{ "hctosys",   0, 0, 's' },
-		{ "systohc",   0, 0, 'w' },
-		{ "file",      1, 0, 'f' },
-		{ 0,           0, 0, 0 }
-	};
-	applet_long_options = hwclock_long_options;
+	static const char hwclock_longopts[] =
+		"localtime\0" No_argument "l"
+		"utc\0"       No_argument "u"
+		"show\0"      No_argument "r"
+		"hctosys\0"   No_argument "s"
+		"systohc\0"   No_argument "w"
+		"file\0"      Required_argument "f"
+		"\0";
+	applet_long_options = hwclock_longopts;
 #endif
 	opt_complementary = "r--ws:w--rs:s--wr:l--u:u--l";
 	opt = getopt32(argc, argv, "lurswf:", &rtcname);