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

5 files changed, 57 insertions, 62 deletions

diff --git a/networking/ftpgetput.c b/networking/ftpgetput.c
index 54b5f5a..011fbac 100644
--- a/networking/ftpgetput.c
+++ b/networking/ftpgetput.c
@@ -287,14 +287,13 @@ int ftp_send(ftp_host_info_t *server, FILE *control_stream,
 #define FTPGETPUT_OPT_PORT	16
 
 #if ENABLE_FEATURE_FTPGETPUT_LONG_OPTIONS
-static const struct option ftpgetput_long_options[] = {
-	{ "continue", 1, NULL, 'c' },
-	{ "verbose", 0, NULL, 'v' },
-	{ "username", 1, NULL, 'u' },
-	{ "password", 1, NULL, 'p' },
-	{ "port", 1, NULL, 'P' },
-	{ 0, 0, 0, 0 }
-};
+static const char ftpgetput_longopts[] =
+	"continue\0" Required_argument "c"
+	"verbose\0"  No_argument       "v"
+	"username\0" Required_argument "u"
+	"password\0" Required_argument "p"
+	"port\0"     Required_argument "P"
+	"\0";
 #endif
 
 int ftpgetput_main(int argc, char **argv);
@@ -329,7 +328,7 @@ int ftpgetput_main(int argc, char **argv)
 	 * Decipher the command line
 	 */
 #if ENABLE_FEATURE_FTPGETPUT_LONG_OPTIONS
-	applet_long_options = ftpgetput_long_options;
+	applet_long_options = ftpgetput_longopts;
 #endif
 	opt_complementary = "=3"; /* must have 3 params */
 	opt = getopt32(argc, argv, "cvu:p:P:", &server->user, &server->password, &port);
diff --git a/networking/ipcalc.c b/networking/ipcalc.c
index a39ad1a..32b939f 100644
--- a/networking/ipcalc.c
+++ b/networking/ipcalc.c
@@ -63,17 +63,16 @@ int get_prefix(unsigned long netmask);
 #define SILENT    0x20
 
 #if ENABLE_FEATURE_IPCALC_LONG_OPTIONS
-	static const struct option long_options[] = {
-		{ "netmask",     no_argument, NULL, 'm' },
-		{ "broadcast",   no_argument, NULL, 'b' },
-		{ "network",     no_argument, NULL, 'n' },
+	static const char ipcalc_longopts[] =
+		"netmask\0"   No_argument "m"
+		"broadcast\0" No_argument "b"
+		"network\0"   No_argument "n"
 # if ENABLE_FEATURE_IPCALC_FANCY
-		{ "prefix",      no_argument, NULL, 'p' },
-		{ "hostname",	 no_argument, NULL, 'h' },
-		{ "silent",      no_argument, NULL, 's' },
+		"prefix\0"    No_argument "p"
+		"hostname\0"  No_argument "h"
+		"silent\0"    No_argument "s"
 # endif
-		{ NULL, 0, NULL, 0 }
-	};
+		"\0";
 #endif
 
 int ipcalc_main(int argc, char **argv);
@@ -86,7 +85,7 @@ int ipcalc_main(int argc, char **argv)
 	char *ipstr;
 
 #if ENABLE_FEATURE_IPCALC_LONG_OPTIONS
-	applet_long_options = long_options;
+	applet_long_options = ipcalc_longopts;
 #endif
 	opt = getopt32(argc, argv, "mbn" USE_FEATURE_IPCALC_FANCY("phs"));
 	argc -= optind;
diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
index 3165c2d..2b95c32 100644
--- a/networking/udhcp/dhcpc.c
+++ b/networking/udhcp/dhcpc.c
@@ -181,27 +181,26 @@ int udhcpc_main(int argc, char **argv)
 		OPT_v = 1 << 17,
 	};
 #if ENABLE_GETOPT_LONG
-	static const struct option arg_options[] = {
-		{ "clientid",   required_argument,      0, 'c' },
-		{ "clientid-none", no_argument,         0, 'C' },
-		{ "vendorclass", required_argument,     0, 'V' },
-		{ "foreground", no_argument,            0, 'f' },
-		{ "background", no_argument,            0, 'b' },
-		{ "hostname",   required_argument,      0, 'H' },
-		{ "hostname",   required_argument,      0, 'h' },
-		{ "fqdn",       required_argument,      0, 'F' },
-		{ "interface",  required_argument,      0, 'i' },
-		{ "now",        no_argument,            0, 'n' },
-		{ "pidfile",    required_argument,      0, 'p' },
-		{ "quit",       no_argument,            0, 'q' },
-		{ "release",    no_argument,            0, 'R' },
-		{ "request",    required_argument,      0, 'r' },
-		{ "script",     required_argument,      0, 's' },
-		{ "timeout",    required_argument,      0, 'T' },
-		{ "version",    no_argument,            0, 'v' },
-		{ "retries",    required_argument,      0, 't' },
-		{ 0, 0, 0, 0 }
-	};
+	static const char udhcpc_longopts[] =
+		"clientid\0"      Required_argument "c"
+		"clientid-none\0" No_argument       "C"
+		"vendorclass\0"   Required_argument "V"
+		"foreground\0"    No_argument       "f"
+		"background\0"    No_argument       "b"
+		"hostname\0"      Required_argument "H"
+		"hostname\0"      Required_argument "h"
+		"fqdn\0"          Required_argument "F"
+		"interface\0"     Required_argument "i"
+		"now\0"           No_argument       "n"
+		"pidfile\0"       Required_argument "p"
+		"quit\0"          No_argument       "q"
+		"release\0"       No_argument       "R"
+		"request\0"       Required_argument "r"
+		"script\0"        Required_argument "s"
+		"timeout\0"       Required_argument "T"
+		"version\0"       No_argument       "v"
+		"retries\0"       Required_argument "t"
+		"\0";
 #endif
 	/* Default options. */
 	client_config.interface = "eth0";
@@ -213,7 +212,7 @@ int udhcpc_main(int argc, char **argv)
 	opt_complementary = "c--C:C--c" // mutually exclusive
 	                    ":hH:Hh"; // -h and -H are the same
 #if ENABLE_GETOPT_LONG
-	applet_long_options = arg_options;
+	applet_long_options = udhcpc_longopts;
 #endif
 	opt = getopt32(argc, argv, "c:CV:fbH:h:F:i:np:qRr:s:T:t:v",
 		&str_c, &str_V, &str_h, &str_h, &str_F,
diff --git a/networking/udhcp/dumpleases.c b/networking/udhcp/dumpleases.c
index 95df7ea..fb50d68 100644
--- a/networking/udhcp/dumpleases.c
+++ b/networking/udhcp/dumpleases.c
@@ -24,14 +24,13 @@ int dumpleases_main(int argc, char **argv)
 		OPT_f	= 0x4,	// -f
 	};
 #if ENABLE_GETOPT_LONG
-	static const struct option options[] = {
-		{ "absolute", no_argument, 0, 'a' },
-		{ "remaining", no_argument, 0, 'r' },
-		{ "file", required_argument, 0, 'f' },
-		{ NULL, 0, 0, 0 }
-	};
+	static const char dumpleases_longopts[] =
+		"absolute\0"  No_argument       "a"
+		"remaining\0" No_argument       "r"
+		"file\0"      Required_argument "f"
+		"\0";
 
-	applet_long_options = options;
+	applet_long_options = dumpleases_longopts;
 #endif
 	opt_complementary = "=0:a--r:r--a";
 	opt = getopt32(argc, argv, "arf:", &file);
diff --git a/networking/wget.c b/networking/wget.c
index 19ff792..ad09091 100644
--- a/networking/wget.c
+++ b/networking/wget.c
@@ -132,20 +132,19 @@ int wget_main(int argc, char **argv)
 		WGET_OPT_HEADER     = 0x100,
 	};
 #if ENABLE_FEATURE_WGET_LONG_OPTIONS
-	static const struct option wget_long_options[] = {
-		/* name, has_arg, flag, val */
-		{ "continue",         no_argument, NULL, 'c' },
-		{ "spider",           no_argument, NULL, 's' },
-		{ "quiet",            no_argument, NULL, 'q' },
-		{ "output-document",  required_argument, NULL, 'O' },
-		{ "directory-prefix", required_argument, NULL, 'P' },
-		{ "proxy",            required_argument, NULL, 'Y' },
-		{ "user-agent",       required_argument, NULL, 'U' },
-		{ "passive-ftp",      no_argument, NULL, 0xff },
-		{ "header",           required_argument, NULL, 0xfe },
-		{ 0, 0, 0, 0 }
-	};
-	applet_long_options = wget_long_options;
+	static const char wget_longopts[] =
+		/* name, has_arg, val */
+		"continue\0"         No_argument       "c"
+		"spider\0"           No_argument       "s"
+		"quiet\0"            No_argument       "q"
+		"output-document\0"  Required_argument "O"
+		"directory-prefix\0" Required_argument "P"
+		"proxy\0"            Required_argument "Y"
+		"user-agent\0"       Required_argument "U"
+		"passive-ftp\0"      No_argument       "\xff"
+		"header\0"           Required_argument "\xfe"
+		"\0";
+	applet_long_options = wget_longopts;
 #endif
 	/* server.allocated = target.allocated = NULL; */
 	opt_complementary = "-1" USE_FEATURE_WGET_LONG_OPTIONS(":\xfe::");