touch: fix help text to not show options disabled in .config

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>

coreutils/Config.src

@@ -661,13 +661,6 @@ config FEATURE_TEE_USE_BLOCK_IO
 	help
 	  Enable this option for a faster tee, at expense of size.
 
-config TOUCH
-	bool "touch"
-	default y
-	help
-	  touch is used to create or change the access and/or
-	  modification timestamp of specified files.
-
 config TRUE
 	bool "true"
 	default y

coreutils/Kbuild.src

@@ -74,7 +74,6 @@ lib-$(CONFIG_SYNC)      += sync.o
 lib-$(CONFIG_TAC)       += tac.o
 lib-$(CONFIG_TAIL)      += tail.o
 lib-$(CONFIG_TEE)       += tee.o
-lib-$(CONFIG_TOUCH)     += touch.o
 lib-$(CONFIG_TRUE)      += true.o
 lib-$(CONFIG_TTY)       += tty.o
 lib-$(CONFIG_UNAME)     += uname.o

coreutils/touch.c

@@ -19,6 +19,35 @@
 
 #include "libbb.h"
 
+//config:config TOUCH
+//config:	bool "touch"
+//config:	default y
+//config:	help
+//config:	  touch is used to create or change the access and/or
+//config:	  modification timestamp of specified files.
+
+//applet:IF_TOUCH(APPLET_NOFORK(touch, touch, _BB_DIR_BIN, _BB_SUID_DROP, touch))
+
+//kbuild:lib-$(CONFIG_TOUCH) += touch.o
+
+//usage:#define touch_trivial_usage
+//usage:       "[-c]" IF_DESKTOP(" [-d DATE] [-r FILE]") " FILE [FILE]..."
+//usage:#define touch_full_usage "\n\n"
+//usage:       "Update the last-modified date on the given FILE[s]\n"
+//usage:     "\nOptions:"
+//usage:     "\n	-c	Don't create files"
+//usage:	IF_DESKTOP(
+//usage:     "\n	-d DT	Date/time to use"
+//usage:     "\n	-r FILE	Use FILE's date/time"
+//usage:	)
+//usage:
+//usage:#define touch_example_usage
+//usage:       "$ ls -l /tmp/foo\n"
+//usage:       "/bin/ls: /tmp/foo: No such file or directory\n"
+//usage:       "$ touch /tmp/foo\n"
+//usage:       "$ ls -l /tmp/foo\n"
+//usage:       "-rw-rw-r--    1 andersen andersen        0 Apr 15 01:11 /tmp/foo\n"
+
 /* This is a NOFORK applet. Be very careful! */
 
 /* coreutils implements:

include/applets.src.h

@@ -356,7 +356,6 @@ IF_TFTPD(APPLET(tftpd, _BB_DIR_USR_BIN, _BB_SUID_DROP))
 IF_TIME(APPLET(time, _BB_DIR_USR_BIN, _BB_SUID_DROP))
 IF_TIMEOUT(APPLET(timeout, _BB_DIR_USR_BIN, _BB_SUID_DROP))
 IF_TOP(APPLET(top, _BB_DIR_USR_BIN, _BB_SUID_DROP))
-IF_TOUCH(APPLET_NOFORK(touch, touch, _BB_DIR_BIN, _BB_SUID_DROP, touch))
 IF_TR(APPLET(tr, _BB_DIR_USR_BIN, _BB_SUID_DROP))
 IF_TRACEROUTE(APPLET(traceroute, _BB_DIR_USR_BIN, _BB_SUID_MAYBE))
 IF_TRACEROUTE6(APPLET(traceroute6, _BB_DIR_USR_BIN, _BB_SUID_MAYBE))

include/usage.src.h

@@ -4005,22 +4005,6 @@ INSERT
        "and display a screenful of them." \
 //TODO: add options and keyboard commands
 
-#define touch_trivial_usage \
-       "[-c] [-d DATE] [-r FILE] FILE [FILE]..."
-#define touch_full_usage "\n\n" \
-       "Update the last-modified date on the given FILE[s]\n" \
-     "\nOptions:" \
-     "\n	-c	Don't create files" \
-     "\n	-d DT	Date/time to use" \
-     "\n	-r FILE	Use FILE's date/time" \
-
-#define touch_example_usage \
-       "$ ls -l /tmp/foo\n" \
-       "/bin/ls: /tmp/foo: No such file or directory\n" \
-       "$ touch /tmp/foo\n" \
-       "$ ls -l /tmp/foo\n" \
-       "-rw-rw-r--    1 andersen andersen        0 Apr 15 01:11 /tmp/foo\n"
-
 #define tr_trivial_usage \
        "[-cds] STRING1 [STRING2]"
 #define tr_full_usage "\n\n" \