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mainmenu "Toybox Configuration"
source generated/Config.probed
source generated/Config.in
comment ""
menu "Toybox global settings"
# This entry controls the multiplexer, disabled for single command builds
config TOYBOX
bool
default y
help
usage: toybox [--long | --help | --version | [COMMAND] [ARGUMENTS...]]
With no arguments, "toybox" shows available COMMAND names. Add --long
to include suggested install path for each command, see
https://landley.net/toybox/faq.html#install for details.
First argument is name of a COMMAND to run, followed by any ARGUMENTS
to that command. Most toybox commands also understand:
--help Show command help (only)
--version Show toybox version (only)
The filename "-" means stdin/stdout, and "--" stops argument parsing.
Numerical arguments accept a single letter suffix for
kilo, mega, giga, tera, peta, and exabytes, plus an additional
"d" to indicate decimal 1000's instead of 1024.
Durations can be decimal fractions and accept minute ("m"), hour ("h"),
or day ("d") suffixes (so 0.1m = 6s).
config TOYBOX_SUID
bool "SUID support"
default y
help
Support for the Set User ID bit, to install toybox suid root and drop
permissions for commands which do not require root access. To use
this change ownership of the file to the root user and set the suid
bit in the file permissions:
chown root:root toybox; chmod +s toybox
choice
prompt "Security Blanket"
default TOYBOX_LSM_NONE
help
Select a Linux Security Module to complicate your system
until you can't find holes in it.
config TOYBOX_LSM_NONE
bool "None"
help
Don't try to achieve "watertight" by plugging the holes in a
collander, instead use conventional unix security (and possibly
Linux Containers) for a simple straightforward system.
config TOYBOX_SELINUX
bool "SELinux support"
help
Include SELinux options in commands such as ls, and add
SELinux-specific commands such as chcon to the Android menu.
config TOYBOX_SMACK
bool "SMACK support"
help
Include SMACK options in commands like ls for systems like Tizen.
endchoice
config TOYBOX_LIBCRYPTO
bool "Use libcrypto (OpenSSL/BoringSSL)"
default n
help
Use faster hash functions out of external -lcrypto library.
config TOYBOX_LIBZ
bool "Use libz (zlib)"
default n
help
Use libz for gz support.
config TOYBOX_FLOAT
bool "Floating point support"
default y
help
Include floating point support infrastructure and commands that
require it.
config TOYBOX_HELP
bool "Help messages"
default y
help
Include help text for each command.
config TOYBOX_HELP_DASHDASH
bool "--help and --version"
default y
depends on TOYBOX_HELP
help
Support --help argument in all commands, even ones with a NULL
optstring. (Use TOYFLAG_NOHELP to disable.) Produces the same output
as "help command". --version shows toybox version.
config TOYBOX_FREE
bool "Free memory unnecessarily"
default n
help
When a program exits, the operating system will clean up after it
(free memory, close files, etc). To save size, toybox usually relies
on this behavior. If you're running toybox under a debugger or
without a real OS (ala newlib+libgloss), enable this to make toybox
clean up after itself.
config TOYBOX_NORECURSE
bool "Disable recursive execution"
default n
help
When one toybox command calls another, usually it just calls the new
command's main() function rather than searching the $PATH and calling
exec on another file (which is much slower).
This disables that optimization, so toybox will run external commands
even when it has a built-in version of that command. This requires
toybox symlinks to be installed in the $PATH, or re-invoking the
"toybox" multiplexer command by name.
config TOYBOX_DEBUG
bool "Debugging tests"
default n
help
Enable extra checks for debugging purposes. All of them catch
things that can only go wrong at development time, not runtime.
config TOYBOX_PEDANTIC_ARGS
bool "Pedantic argument checking"
default n
help
Check arguments for commands that have no arguments.
config TOYBOX_UID_SYS
int "First system UID"
default 100
help
When commands like useradd/groupadd allocate system IDs, start here.
config TOYBOX_UID_USR
int "First user UID"
default 500
help
When commands like useradd/groupadd allocate user IDs, start here.
config TOYBOX_FORCE_NOMMU
bool "Enable nommu support when the build can't detect it."
default n
help
When using musl-libc on a nommu system, you'll need to say "y" here
unless you used the patch in the mcm-buildall.sh script. You can also
say "y" here to test the nommu codepaths on an mmu system.
A nommu system can't use fork(), it can only vfork() which suspends
the parent until the child calls exec() or exits. When a program
needs a second instance of itself to run specific code at the same
time as the parent, it must use a more complicated approach (such as
exec("/proc/self/exe") then pass data to the new child through a pipe)
which is larger and slower, especially for things like toysh subshells
that need to duplicate a lot of internal state in the child process
fork() gives you for free.
Libraries like uclibc omit fork() on nommu systems, allowing
compile-time probes to select which codepath to use. But musl
intentionally includes a broken version of fork() that always returns
-ENOSYS on nommu systems, and goes out of its way to prevent any
cross-compile compatible compile-time probes for a nommu system.
(It doesn't even #define __MUSL__ in features.h.) Musl does this
despite the fact that a nommu system can't even run standard ELF
binaries (requiring specially packaged executables) because it wants
to force every program to either include all nommu code in every
instance ever built, or drop nommu support altogether.
Building a toolchain scripts/mcm-buildall.sh patches musl to fix this.
endmenu
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