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kumquat-buildroot/system/Config.in
Thomas Petazzoni a8da3cd61a util-linux: libblkid needs fork(), disable on !MMU 
The libblkid library in util-linux uses fork. While it seems
potentially possible to disable the parts of the library that use fork
(the only parts using fork are parts related to LVM and Device Mapper,
which are said to be legacy as they are replaced by sysfs based
scanning, instead of having to fork to run a separate process).

However, since libblkid is used by:

 - e2fsprogs, which uses lots of fork all over the place
 - udev, which most likely will also need fork

There is not much point in making libblkid fork-less. As a
consequence, this commit makes util-linux/libblkid unavailable on
non-MMU architectures, and propagates the relevant dependency to the
reverse dependencies of libblkid.

This fixes the e2fsprogs build failure seen on Blackfin. The failure
was due to a configure test of e2fsprogs which was trying to link a
small test program against libblkid, which failed because there was an
undefined reference to fork() in the libblkid code.

Fixes:

  http://autobuild.buildroot.net/results/ee2c1568d16ac040011dd4d6d8b543ff9e9e2622/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2014-02-24 09:01:05 +01:00

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menu "System configuration"
config BR2_TARGET_GENERIC_HOSTNAME
string "System hostname"
default "buildroot"
help
Select system hostname to be stored in /etc/hostname.
Leave empty to not create /etc/hostname, or to keep the
one from a custom skeleton.
config BR2_TARGET_GENERIC_ISSUE
string "System banner"
default "Welcome to Buildroot"
help
Select system banner (/etc/issue) to be displayed at login.
Leave empty to not create /etc/issue, or to keep the
one from a custom skeleton.
choice
bool "Passwords encoding"
default BR2_TARGET_GENERIC_PASSWD_MD5
help
Choose the password encoding scheme to use when Buildroot
needs to encode a password (eg. the root password, below).
Note: this is used at build-time, and *not* at runtime.
config BR2_TARGET_GENERIC_PASSWD_DES
bool "des"
help
Use standard 56-bit DES-based crypt(3) to encode passwords.
Old, wildly available, but also the weakest, very susceptible to
brute-force attacks.
config BR2_TARGET_GENERIC_PASSWD_MD5
bool "md5"
help
Use MD5 to encode passwords.
The default. Wildly available, and pretty good.
Although pretty strong, MD5 is now an old hash function, and
suffers from some weaknesses, which makes it susceptible to
brute-force attacks.
config BR2_TARGET_GENERIC_PASSWD_SHA256
bool "sha-256"
help
Use SHA256 to encode passwords.
Very strong, but not ubiquitous, although available in glibc
for some time now. Choose only if you are sure your C library
understands SHA256 passwords.
config BR2_TARGET_GENERIC_PASSWD_SHA512
bool "sha-512"
help
Use SHA512 to encode passwords.
Extremely strong, but not ubiquitous, although available in glibc
for some time now. Choose only if you are sure your C library
understands SHA512 passwords.
endchoice # Passwd encoding
config BR2_TARGET_GENERIC_PASSWD_METHOD
string
default "des" if BR2_TARGET_GENERIC_PASSWD_DES
default "md5" if BR2_TARGET_GENERIC_PASSWD_MD5
default "sha-256" if BR2_TARGET_GENERIC_PASSWD_SHA256
default "sha-512" if BR2_TARGET_GENERIC_PASSWD_SHA512
choice
prompt "Init system"
default BR2_INIT_BUSYBOX
config BR2_INIT_BUSYBOX
bool "Busybox"
select BR2_PACKAGE_BUSYBOX
config BR2_INIT_SYSV
bool "systemV"
select BR2_PACKAGE_BUSYBOX_SHOW_OTHERS # sysvinit
select BR2_PACKAGE_SYSVINIT
config BR2_INIT_SYSTEMD
bool "systemd"
depends on BR2_LARGEFILE
depends on BR2_USE_WCHAR
depends on BR2_INET_IPV6
depends on BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_UDEV
depends on BR2_TOOLCHAIN_HAS_THREADS
depends on BR2_USE_MMU
select BR2_PACKAGE_DBUS
select BR2_PACKAGE_SYSTEMD
comment 'systemd needs udev /dev management and a toolchain w/ largefile, wchar, IPv6, threads'
depends on BR2_USE_MMU
depends on !(BR2_LARGEFILE && BR2_USE_WCHAR && \
BR2_INET_IPV6 && BR2_TOOLCHAIN_HAS_THREADS && \
BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_UDEV)
config BR2_INIT_NONE
bool "None"
endchoice
choice
prompt "/dev management"
default BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_DEVTMPFS
config BR2_ROOTFS_DEVICE_CREATION_STATIC
bool "Static using device table"
config BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_DEVTMPFS
bool "Dynamic using devtmpfs only"
config BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV
bool "Dynamic using mdev"
select BR2_PACKAGE_BUSYBOX
config BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_UDEV
bool "Dynamic using udev"
depends on !BR2_avr32 # udev
depends on BR2_LARGEFILE # udev
depends on BR2_USE_WCHAR # udev
depends on !BR2_PREFER_STATIC_LIB # udev -> kmod
depends on BR2_USE_MMU # udev -> util-linux/libblkid
select BR2_PACKAGE_UDEV
comment "udev needs a toolchain w/ largefile, wchar"
depends on !BR2_avr32 # udev
depends on !(BR2_LARGEFILE && BR2_USE_WCHAR)
comment "udev doesn't work with 'prefer static libraries'"
depends on !BR2_avr32 # udev
depends on BR2_PREFER_STATIC_LIB
endchoice
config BR2_ROOTFS_DEVICE_TABLE
string "Path to the permission tables"
default "system/device_table.txt"
help
Specify a space-separated list of permission table locations,
that will be passed to the makedevs utility to assign
correct owners and permissions on various files in the
target filesystem.
See package/makedevs/README for details on the usage and
syntax of these files.
config BR2_ROOTFS_STATIC_DEVICE_TABLE
string "Path to the device tables"
default "system/device_table_dev.txt"
depends on BR2_ROOTFS_DEVICE_CREATION_STATIC
help
Specify a space-separated list of device table locations,
that will be passed to the makedevs utility to create all
the special device files under /dev.
See package/makedevs/README for details on the usage and
syntax of these files.
choice
prompt "Root FS skeleton"
config BR2_ROOTFS_SKELETON_DEFAULT
bool "default target skeleton"
help
Use default target skeleton
config BR2_ROOTFS_SKELETON_CUSTOM
bool "custom target skeleton"
help
Use custom target skeleton.
endchoice
if BR2_ROOTFS_SKELETON_CUSTOM
config BR2_ROOTFS_SKELETON_CUSTOM_PATH
string "custom target skeleton path"
default "system/skeleton"
help
Path custom target skeleton.
endif
if BR2_ROOTFS_SKELETON_DEFAULT
config BR2_TARGET_GENERIC_ROOT_PASSWD
string "Root password"
default ""
help
Set the initial root password (in clear). It will be md5-encrypted.
If set to empty (the default), then no root password will be set,
and root will need no password to log in.
WARNING! WARNING!
Although pretty strong, MD5 is now an old hash function, and
suffers from some weaknesses, which makes it susceptible to attacks.
It is showing its age, so this root password should not be trusted
to properly secure any product that can be shipped to the wide,
hostile world.
WARNING! WARNING!
The password appears in clear in the .config file, and may appear
in the build log! Avoid using a valuable password if either the
.config file or the build log may be distributed!
config BR2_TARGET_GENERIC_GETTY
bool "Run a getty (login prompt) after boot"
default y
if BR2_TARGET_GENERIC_GETTY
menu "getty options"
config BR2_TARGET_GENERIC_GETTY_PORT
string "TTY port"
default "ttyS0"
help
Specify a port to run a getty on.
choice
prompt "Baudrate"
default BR2_TARGET_GENERIC_GETTY_BAUDRATE_115200
help
Select a baudrate to use.
config BR2_TARGET_GENERIC_GETTY_BAUDRATE_KEEP
bool "keep kernel default"
config BR2_TARGET_GENERIC_GETTY_BAUDRATE_9600
bool "9600"
config BR2_TARGET_GENERIC_GETTY_BAUDRATE_19200
bool "19200"
config BR2_TARGET_GENERIC_GETTY_BAUDRATE_38400
bool "38400"
config BR2_TARGET_GENERIC_GETTY_BAUDRATE_57600
bool "57600"
config BR2_TARGET_GENERIC_GETTY_BAUDRATE_115200
bool "115200"
endchoice
config BR2_TARGET_GENERIC_GETTY_BAUDRATE
string
default "0" if BR2_TARGET_GENERIC_GETTY_BAUDRATE_KEEP
default "9600" if BR2_TARGET_GENERIC_GETTY_BAUDRATE_9600
default "19200" if BR2_TARGET_GENERIC_GETTY_BAUDRATE_19200
default "38400" if BR2_TARGET_GENERIC_GETTY_BAUDRATE_38400
default "57600" if BR2_TARGET_GENERIC_GETTY_BAUDRATE_57600
default "115200" if BR2_TARGET_GENERIC_GETTY_BAUDRATE_115200
config BR2_TARGET_GENERIC_GETTY_TERM
string "TERM environment variable"
default "vt100"
help
Specify a TERM type.
config BR2_TARGET_GENERIC_GETTY_OPTIONS
string "other options to pass to getty"
default ""
help
Any other flags you want to pass to getty,
Refer to getty --help for details.
endmenu
endif
config BR2_TARGET_GENERIC_REMOUNT_ROOTFS_RW
bool "remount root filesystem read-write during boot"
default y
help
The root filesystem is typically mounted read-only at boot.
By default, buildroot remounts it in read-write mode early during the
boot process.
Say no here if you would rather like your root filesystem to remain
read-only.
If unsure, say Y.
endif # BR2_ROOTFS_SKELETON_DEFAULT
config BR2_ROOTFS_OVERLAY
string "Root filesystem overlay directories"
default ""
help
Specify a list of directories that are copied over the target
root filesystem after the build has finished and before it is
packed into the selected filesystem images.
They are copied as-is into the rootfs, excluding files ending with
~ and .git, .svn and .hg directories.
config BR2_ROOTFS_POST_BUILD_SCRIPT
string "Custom scripts to run before creating filesystem images"
default ""
help
Specify a space-separated list of scripts to be run after the build
has finished and before Buildroot starts packing the files into
selected filesystem images.
This gives users the oportunity to do board-specific cleanups,
add-ons and the like, so the generated files can be used directly
without further processing.
These scripts are called with the target directory name as first
argument. Make sure the exit code of those scripts are 0, otherwise
make will stop after calling them.
config BR2_ROOTFS_POST_IMAGE_SCRIPT
string "Custom scripts to run after creating filesystem images"
default ""
help
Specify a space-separated list of scripts to be run after
the build has finished and after Buildroot has packed the
files into selected filesystem images.
This can for example be used to call a tool building a
firmware image from different images generated by Buildroot,
or automatically extract the tarball root filesystem image
into some location exported by NFS, or any other custom
action.
These scripts are called with the images directory name as
first argument. The script is executed from the main Buildroot
source directory as the current directory.
config BR2_ROOTFS_POST_SCRIPT_ARGS
string "Extra post-{build,image} arguments"
depends on BR2_ROOTFS_POST_BUILD_SCRIPT != "" || BR2_ROOTFS_POST_IMAGE_SCRIPT != ""
help
Pass these aditional arguments to each post-build or post-image
scripts.
Note that all the post-build and post-image scripts will be passed
the same set of arguments, you can not pass different arguments to
each script.
Note also, as stated in their respective help text, that the first
argument to each post-build or post-image script is the target
directory / images directory. The arguments in this option will be
passed *after* those.
endmenu
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