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

6 files changed, 43 insertions, 49 deletions

diff --git a/coreutils/env.c b/coreutils/env.c
index ad30f01..8d20eac 100644
--- a/coreutils/env.c
+++ b/coreutils/env.c
@@ -35,11 +35,10 @@ extern char **environ;
 #include "libbb.h"
 
 #if ENABLE_FEATURE_ENV_LONG_OPTIONS
-static const struct option env_long_options[] = {
-	{ "ignore-environment", 0, NULL, 'i' },
-	{ "unset", 1, NULL, 'u' },
-	{ 0, 0, 0, 0 }
-};
+static const char env_longopts[] =
+	"ignore-environment\0" No_argument       "i"
+	"unset\0"              Required_argument "u"
+	"\0";
 #endif
 
 int env_main(int argc, char** argv);
@@ -53,7 +52,7 @@ int env_main(int argc, char** argv)
 
 	opt_complementary = "u::";
 #if ENABLE_FEATURE_ENV_LONG_OPTIONS
-	applet_long_options = env_long_options;
+	applet_long_options = env_longopts;
 #endif
 	opt = getopt32(argc, argv, "+iu:", &unset_env);
 	argv += optind;
diff --git a/coreutils/install.c b/coreutils/install.c
index 8d71fa0..8d54949 100644
--- a/coreutils/install.c
+++ b/coreutils/install.c
@@ -16,20 +16,19 @@
 #include "libcoreutils/coreutils.h"
 
 #if ENABLE_FEATURE_INSTALL_LONG_OPTIONS
-static const struct option install_long_options[] = {
-	{ "directory",           0, NULL, 'd' },
-	{ "preserve-timestamps", 0, NULL, 'p' },
-	{ "strip",               0, NULL, 's' },
-	{ "group",               0, NULL, 'g' },
-	{ "mode",                0, NULL, 'm' },
-	{ "owner",               0, NULL, 'o' },
+static const char install_longopts[] =
+	"directory\0"           No_argument       "d"
+	"preserve-timestamps\0" No_argument       "p"
+	"strip\0"               No_argument       "s"
+	"group\0"               No_argument       "g"
+	"mode\0"                No_argument       "m"
+	"owner\0"               No_argument       "o"
 #if ENABLE_SELINUX
-	{ "context",             1, NULL, 'Z' },
-	{ "preserve_context",    0, NULL, 0xff },
-	{ "preserve-context",    0, NULL, 0xff },
+	"context\0"             Required_argument "Z"
+	"preserve_context\0"    No_argument       "\xff"
+	"preserve-context\0"    No_argument       "\xff"
 #endif
-	{ 0, 0, 0, 0 }
-};
+	"\0";
 #endif
 
 
@@ -97,7 +96,7 @@ int install_main(int argc, char **argv)
 	};
 
 #if ENABLE_FEATURE_INSTALL_LONG_OPTIONS
-	applet_long_options = install_long_options;
+	applet_long_options = install_longopts;
 #endif
 	opt_complementary = "s--d:d--s" USE_SELINUX(":Z--\xff:\xff--Z");
 	/* -c exists for backwards compatibility, it's needed */
diff --git a/coreutils/ls.c b/coreutils/ls.c
index a5bd0e3..8545edd 100644
--- a/coreutils/ls.c
+++ b/coreutils/ls.c
@@ -117,13 +117,12 @@ SPLIT_SUBDIR    = 2,
 
 /* colored LS support by JaWi, janwillem.janssen@lxtreme.nl */
 #if ENABLE_FEATURE_LS_COLOR
-static int show_color;
+static smallint show_color;
 /* long option entry used only for --color, which has no short option
  * equivalent */
-static const struct option ls_color_opt[] = {
-	{ "color", optional_argument, NULL, 1 },
-	{ NULL, 0, NULL, 0 }
-};
+static const char ls_color_opt[] =
+	"color\0" Optional_argument "\xff" /* no short equivalent */
+	"\0";
 #else
 enum { show_color = 0 };
 #endif
diff --git a/coreutils/mkdir.c b/coreutils/mkdir.c
index 60c03a1..b0595b4 100644
--- a/coreutils/mkdir.c
+++ b/coreutils/mkdir.c
@@ -25,14 +25,13 @@
 /* This is a NOFORK applet. Be very careful! */
 
 #if ENABLE_FEATURE_MKDIR_LONG_OPTIONS
-static const struct option mkdir_long_options[] = {
-	{ "mode"   , 1, NULL, 'm' },
-	{ "parents", 0, NULL, 'p' },
+static const char mkdir_longopts[] =
+	"mode\0"    Required_argument "m"
+	"parents\0" No_argument       "p"
 #if ENABLE_SELINUX
-	{ "context", 1, NULL, 'Z' },
+	"context\0" Required_argument "Z"
 #endif
-	{ NULL, 0, NULL, 0 }
-};
+	"\0";
 #endif
 
 int mkdir_main(int argc, char **argv);
@@ -48,7 +47,7 @@ int mkdir_main(int argc, char **argv)
 #endif
 
 #if ENABLE_FEATURE_MKDIR_LONG_OPTIONS
-	applet_long_options = mkdir_long_options;
+	applet_long_options = mkdir_longopts;
 #endif
 	opt = getopt32(argc, argv, "m:p" USE_SELINUX("Z:"), &smode USE_SELINUX(,&scontext));
 	if (opt & 1) {
diff --git a/coreutils/mv.c b/coreutils/mv.c
index 8d9c982..bb96af8 100644
--- a/coreutils/mv.c
+++ b/coreutils/mv.c
@@ -21,11 +21,10 @@
 #include "libcoreutils/coreutils.h"
 
 #if ENABLE_FEATURE_MV_LONG_OPTIONS
-static const struct option mv_long_options[] = {
-	{ "interactive", 0, NULL, 'i' },
-	{ "force", 0, NULL, 'f' },
-	{ 0, 0, 0, 0 }
-};
+static const char mv_longopts[] =
+	"interactive\0" No_argument "i"
+	"force\0"       No_argument "f"
+	"\0";
 #endif
 
 #define OPT_FILEUTILS_FORCE       1
@@ -45,7 +44,7 @@ int mv_main(int argc, char **argv)
 	int copy_flag = 0;
 
 #if ENABLE_FEATURE_MV_LONG_OPTIONS
-	applet_long_options = mv_long_options;
+	applet_long_options = mv_longopts;
 #endif
 	opt_complementary = "f-i:i-f";
 	flags = getopt32(argc, argv, "fi");
diff --git a/coreutils/od_bloaty.c b/coreutils/od_bloaty.c
index af5eba9..335efe7 100644
--- a/coreutils/od_bloaty.c
+++ b/coreutils/od_bloaty.c
@@ -1242,17 +1242,16 @@ int od_main(int argc, char **argv)
 		OPT_traditional = (1 << 18) * ENABLE_GETOPT_LONG,
 	};
 #if ENABLE_GETOPT_LONG
-	static const struct option long_options[] = {
-		{ "skip-bytes",    required_argument, NULL, 'j' },
-		{ "address-radix", required_argument, NULL, 'A' },
-		{ "read-bytes",    required_argument, NULL, 'N' },
-		{ "format",        required_argument, NULL, 't' },
-		{ "output-duplicates", no_argument,   NULL, 'v' },
-		{ "strings",       optional_argument, NULL, 'S' },
-		{ "width",         optional_argument, NULL, 'w' },
-		{ "traditional",   no_argument,       NULL, 0xff },
-		{ NULL, 0, NULL, 0 }
-	};
+	static const char od_longopts[] =
+		"skip-bytes\0"        Required_argument "j"
+		"address-radix\0"     Required_argument "A"
+		"read-bytes\0"        Required_argument "N"
+		"format\0"            Required_argument "t"
+		"output-duplicates\0" No_argument       "v"
+		"strings\0"           Optional_argument "S"
+		"width\0"             Optional_argument "w"
+		"traditional\0"       No_argument       "\xff"
+		"\0";
 #endif
 	char *str_A, *str_N, *str_j, *str_S;
 	char *str_w = NULL;
@@ -1267,7 +1266,7 @@ int od_main(int argc, char **argv)
 	/* Parse command line */
 	opt_complementary = "t::"; // list
 #if ENABLE_GETOPT_LONG
-	applet_long_options = long_options;
+	applet_long_options = od_longopts;
 #endif
 	opt = getopt32(argc, argv, "A:N:abcdfhij:lot:vxsS:"
 		"w::", // -w with optional param