# This file contains the common configuration options

# that apply to both glibc and eglibc.

comment "glibc/eglibc common options"

config LIBC_GLIBC_EXTRA_CONFIG

    string

    prompt "extra config"

    default ""

    help

      Extra flags to pass onto ./configure when configuring.

      Eg.: --enable-static-nss

config LIBC_GLIBC_EXTRA_CFLAGS

    string

    prompt "extra target CFLAGS"

    default ""

    help

      Extra target CFLAGS to use when building.

config LIBC_EXTRA_CC_ARGS

    string

    prompt "gcc extra flags"

    default ""

    help

      Extra flags to pass gcc when building.

      Seldom used, except for sparc64 which seems to need the flag -64

      to be passed onto gcc.

config LIBC_GLIBC_USE_PORTS

    bool

    prompt "Use the ports addon"

    default n

    help

      The ports addon contains some architecture ports that are not available

      in the official distribution.

      For example, this is the case for ARM with for 2.4 and above.

      Say n only if you're sure that your architecture is in the official

      distribution for your chosen version.

config LIBC_ADDONS_LIST

    string

    prompt "Extra addons"

    default ""

    help

      Extra addons to include. Space separated list.

      You need to specify neither linuxthreads nor nptl, as they are added

      automagically for you depending on the threading model you choosed

      earlier.

      Eg.: crypt        (for very old libces)

if KERNEL_linux

choice

    bool

    prompt "Minimum supported kernel version"

    default LIBC_GLIBC_KERNEL_VERSION_AS_HEADERS

config LIBC_GLIBC_KERNEL_VERSION_NONE

    bool

    prompt "Let ./configure decide"

    help

      Let ./configure decide what minimum kernel version glibc/eglibc

      will be able to run against.

      This will inclde legacy compatibility code for older kernels in

      the C library, thus ensuring that it will run on a large number

      of old kernels.

      The minimum kernel version supported will be dependent upon the

      target you build for. For example:

        alpha*-*-linux-gnu      Requires Linux 2.6.9 for NPTL

        sh[34]-*-linux-gnu      Requires Linux 2.6.11

        powerpc*                Requires Linux 2.4.19

        arm*-*-linux-*gnueabi   Requires Linux 2.6.16

config LIBC_GLIBC_KERNEL_VERSION_AS_HEADERS

    bool

    prompt "Same as kernel headers (default)"

    help

      Normaly, you'll want glibc/eglibc to run against the same kernel

      version as the one used for the headers.

      This is the default.

      If enabled, crosstool-ng will use the chosen version of kernel

      headers for the glibc minimum kernel version supported, which is

      what gets passed to "--enable-kernel=" when configuring glibc.

      Enabling this will ensure that no legacy compatibility code for

      older kernels is built into your C libraries, but it will

      be unable to run on kernel versions older than whichever kernel

      headers version you've built the toolchain for.

      If you know for sure that your toolchain will never need to build

      applications that will run under a kernel version older than your

      chosen kernel headers version (CT_KERNEL_VERSION), you can choose

      "y" here.

config LIBC_GLIBC_KERNEL_VERSION_CHOSEN

    bool

    prompt "Specific kernel version"

    help

      Specify the earliest Linux kernel version you want glibc to

      include support for.  This does not have to match the kernel

      headers version used for your toolchain.  This controls what is

      passed to the "--enable-kernel=" option to the glibc configure

      script.

      If you want to be able to statically link programs with your

      toolchain's C library, make sure this kernel version is lower than

      all kernels you wish to support to avoid "FATAL: kernel too old"

      errors.  The higher the version you specify, the less legacy code

      will be built into libc.

      Most people can leave this at the default value of "2.6.9".

if LIBC_GLIBC_KERNEL_VERSION_CHOSEN

config LIBC_GLIBC_MIN_KERNEL_VERSION

    string

    prompt "Minimum kernel version to support"

    default "2.6.9"

    help

      Enter here the lowest kernel version glibc/eglibc will be able to

      run against.

      The minimum kernel version supported will be dependent upon the

      target you build for. For example:

        alpha*-*-linux-gnu      Requires Linux 2.6.9 for NPTL

        sh[34]-*-linux-gnu      Requires Linux 2.6.11

        powerpc*                Requires Linux 2.4.19

        arm*-*-linux-*gnueabi   Requires Linux 2.6.16

      Note that no sanity check is performed by crosstool-NG to ensure

      that the value you enter here is appropriate for your target.

endif # LIBC_GLIBC_KERNEL_VERSION_CHOSEN

endchoice

config LIBC_GLIBC_MIN_KERNEL

    string

    default ""                            if LIBC_GLIBC_KERNEL_VERSION_NONE

    default KERNEL_VERSION                if LIBC_GLIBC_KERNEL_VERSION_AS_HEADERS

    default LIBC_GLIBC_MIN_KERNEL_VERSION if LIBC_GLIBC_USE_HEADERS_MIN_KERNEL

endif # KERNEL_linux