config: merge "Busybox Settings" and "Busybox Library Tuning" into one menu

Tweak a few help texts while at it

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

Config.in

@@ -90,10 +90,14 @@ config BUSYBOX
 	help
 	  The busybox applet provides general help regarding busybox and
 	  allows the included applets to be listed.  It's also required
-	  if applet links are to be installed at runtime.
+	  if applet links are to be installed at runtime. If you unselect
+	  this option, running busybox without any arguments will give
+	  just a cryptic error message:
 
-	  If you can live without these features disabling this will save
+	  $ busybox
-	  some space.
+	  busybox: applet not found
+
+	  Running "busybox APPLET [ARGS...]" will still work, of course.
 
 config FEATURE_INSTALLER
 	bool "Support --install [-s] to install applet links at runtime"
@@ -112,6 +116,17 @@ config INSTALL_NO_USR
 	  will install applets only to /bin and /sbin,
 	  never to /usr/bin or /usr/sbin.
 
+config LFS
+	bool "Build with Large File Support (for accessing files > 2 GB)"
+	default y
+	help
+	  If you want to build BusyBox with large file support, then enable
+	  this option. This will have no effect if your kernel or your C
+	  library lacks large file support for large files. Some of the
+	  programs that can benefit from large file support include dd, gzip,
+	  cp, mount, tar, and many others. If you want to access files larger
+	  than 2 Gigabytes, enable this option. Otherwise, leave it set to 'N'.
+
 config PAM
 	bool "Support PAM (Pluggable Authentication Modules)"
 	default n
@@ -136,18 +151,6 @@ config FEATURE_DEVPTS
 	  /dev/ttyp<number> will be used. To use this option, you should have
 	  devpts mounted.
 
-config FEATURE_CLEAN_UP
-	bool "Clean up all memory before exiting (usually not needed)"
-	default n
-	help
-	  As a size optimization, busybox normally exits without explicitly
-	  freeing dynamically allocated memory or closing files. This saves
-	  space since the OS will clean up for us, but it can confuse debuggers
-	  like valgrind, which report tons of memory and resource leaks.
-
-	  Don't enable this unless you have a really good reason to clean
-	  things up manually.
-
 config FEATURE_UTMP
 	bool "Support utmp file"
 	default y
@@ -177,7 +180,7 @@ config FEATURE_PIDFILE
 	  on applets which require pidfiles to run.
 
 config PID_FILE_PATH
-	string "Path to directory for pidfile"
+	string "Directory for pidfiles"
 	default "/var/run"
 	depends on FEATURE_PIDFILE
 	help
@@ -269,24 +272,6 @@ config FEATURE_SUID_CONFIG_QUIET
 	  check this option to avoid users to be notified about missing
 	  permissions.
 
-config SELINUX
-	bool "Support NSA Security Enhanced Linux"
-	default n
-	select PLATFORM_LINUX
-	help
-	  Enable support for SELinux in applets ls, ps, and id. Also provide
-	  the option of compiling in SELinux applets.
-
-	  If you do not have a complete SELinux userland installed, this stuff
-	  will not compile.  Specifially, libselinux 1.28 or better is
-	  directly required by busybox. If the installation is located in a
-	  non-standard directory, provide it by invoking make as follows:
-		CFLAGS=-I<libselinux-include-path> \
-		LDFLAGS=-L<libselinux-lib-path> \
-		make
-
-	  Most people will leave this set to 'N'.
-
 config FEATURE_PREFER_APPLETS
 	bool "exec prefers applets"
 	default n
@@ -311,6 +296,36 @@ config BUSYBOX_EXEC_PATH
 	  executable. If you haven't got /proc, set this to wherever you
 	  want to run BusyBox from.
 
+config SELINUX
+	bool "Support NSA Security Enhanced Linux"
+	default n
+	select PLATFORM_LINUX
+	help
+	  Enable support for SELinux in applets ls, ps, and id. Also provide
+	  the option of compiling in SELinux applets.
+
+	  If you do not have a complete SELinux userland installed, this stuff
+	  will not compile.  Specifially, libselinux 1.28 or better is
+	  directly required by busybox. If the installation is located in a
+	  non-standard directory, provide it by invoking make as follows:
+		CFLAGS=-I<libselinux-include-path> \
+		LDFLAGS=-L<libselinux-lib-path> \
+		make
+
+	  Most people will leave this set to 'N'.
+
+config FEATURE_CLEAN_UP
+	bool "Clean up all memory before exiting (usually not needed)"
+	default n
+	help
+	  As a size optimization, busybox normally exits without explicitly
+	  freeing dynamically allocated memory or closing files. This saves
+	  space since the OS will clean up for us, but it can confuse debuggers
+	  like valgrind, which report tons of memory and resource leaks.
+
+	  Don't enable this unless you have a really good reason to clean
+	  things up manually.
+
 # These are auto-selected by other options
 
 config FEATURE_SYSLOG
@@ -452,17 +467,6 @@ config FEATURE_SHARED_BUSYBOX
 ###
 ###	  Say 'N' unless you know what you are doing.
 
-config LFS
-	bool "Build with Large File Support (for accessing files > 2 GB)"
-	default y
-	help
-	  If you want to build BusyBox with large file support, then enable
-	  this option. This will have no effect if your kernel or your C
-	  library lacks large file support for large files. Some of the
-	  programs that can benefit from large file support include dd, gzip,
-	  cp, mount, tar, and many others. If you want to access files larger
-	  than 2 Gigabytes, enable this option. Otherwise, leave it set to 'N'.
-
 config CROSS_COMPILER_PREFIX
 	string "Cross Compiler prefix"
 	default ""
@@ -669,10 +673,10 @@ config EFENCE
 
 endchoice
 
-endmenu
-
 source libbb/Config.in
 
+endmenu
+
 comment "Applets"
 
 source archival/Config.in

libbb/Config.src

@@ -3,7 +3,7 @@
 # see scripts/kbuild/config-language.txt.
 #
 
-menu "Busybox Library Tuning"
+comment "Library Tuning"
 
 INSERT
 
@@ -66,7 +66,7 @@ config FEATURE_FAST_TOP
 	bool "Faster /proc scanning code (+100 bytes)"
 	default n  # all "fast or small" options default to small
 	help
-	  This option makes top (and ps) ~20% faster (or 20% less CPU hungry),
+	  This option makes top and ps ~20% faster (or 20% less CPU hungry),
 	  but code size is slightly bigger.
 
 config FEATURE_ETC_NETWORKS
@@ -302,13 +302,17 @@ config FEATURE_VERBOSE_CP_MESSAGE
 	default n
 	help
 	  Error messages with this feature enabled:
+
 	    $ cp file /does_not_exist/file
 	    cp: cannot create '/does_not_exist/file': Path does not exist
 	    $ cp file /vmlinuz/file
 	    cp: cannot stat '/vmlinuz/file': Path has non-directory component
+
 	  If this feature is not enabled, they will be, respectively:
+
 	    cp: cannot create '/does_not_exist/file': No such file or directory
 	    cp: cannot stat '/vmlinuz/file': Not a directory
+
 	  This will cost you ~60 bytes.
 
 config FEATURE_USE_SENDFILE
@@ -376,7 +380,4 @@ config FEATURE_HWIB
 	bool "Support infiniband HW"
 	default y
 	help
-	  Support for printing infiniband addresses in
+	  Support for printing infiniband addresses in network applets.
-	  network applets.
-
-endmenu

libbb/common_bufsiz.c

@@ -19,6 +19,7 @@
 //config:
 //config:	  At link time, "text" is padded to a full page. At runtime, all "text"
 //config:	  pages are mapped RO and executable.
+//config:
 //config:	  "Data" starts on the next page boundary, but is not padded
 //config:	  to a full page at the end. "Bss" starts wherever "data" ends.
 //config:	  At runtime, "data" pages are mapped RW and they are file-backed