# This file contains the common configuration options

# that apply to both glibc and eglibc.

# Some architectures require the ports addon. List them one by one here:

# This list must be carefully in sync with the architectures names

# we can find in config/arch/*

config LIBC_GLIBC_MAY_FORCE_PORTS

    bool

    default y if ARCH_arm

    default y if ARCH_mips

    select LIBC_GLIBC_USE_PORTS

# Force using the BFD linker during the toolchain build

config LIBC_glibc_familly

    bool

    default y

    select BINUTILS_FORCE_LD_BFD

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_CONFIGPARMS

    string

    prompt "Extra config params (READ HELP)"

    default "" if ! ARCH_sh

    default "no-z-defs=yes" if ARCH_sh

    help

      Some architectures need to set options in the file configparms.

      This is the case for sh3/4, which really need to set configparms

      to "no-z-defs=yes" as of gcc-3.4/glibc-2.3.2.

      Unless you are building a toolchain for sh3/4, you should leave that empty.

      Note: If you need to pass more than one value, separate them with

            '\n'. Eg.:  var1=val1\nvar2=val2

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_ENABLE_FORTIFIED_BUILD

    bool

    prompt "Enable fortified build (EXPERIMENTAL)"

    depends on EXPERIMENTAL

    default n

    help

      If you say 'y' here, then glibc will be using fortified versions

      of functions with format arguments (eg. vsyslog, printf...), and

      do a sanity check on the format at runtime, to avoid some of the

      common format string attacks.

      This is currently not supported, and will most probably result in

      a broken build, with an error message like:

        ../misc/syslog.c: In function '__vsyslog_chk':

        ../misc/syslog.c:123: sorry, unimplemented: inlining failed in

        call to 'syslog': function body not available

      If you are brave enough and want to debug the issue, then say 'y'

      here. Otherwise, be still and say 'n' (the default). ;-)

config LIBC_DISABLE_VERSIONING

    bool

    prompt "Disable symbols versioning"

    default n

    help

      Do not include versioning information in the library objects.

config LIBC_OLDEST_ABI

    string

    prompt "Oldest supported ABI"

    default ""

    help

      Set the oldest ABI supported by the C library.

      Setting this option, for example, to 2.2 will provide ABI support

      back to (e)glibc-2.2.

      If this option is not set, (e)glibc will choose for you.

config LIBC_GLIBC_FORCE_UNWIND

    bool

    prompt "Force unwind support (READ HELP!)"

    default n

    help

      If your toolchain fails building while building the C library

      start files, or the complete C library, with a message like:

        configure: error: forced unwind support is required

      then you may try setting this to 'y'. Otherwise, leave it to 'n'.

      The issue seems to be related to building NPTL on old versions

      of glibc (and possibly eglibc as well) on some architectures

      (seen on s390, s390x and x86_64).

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 glibc-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 LIBC_GLIBC_USE_PORTS || ( LIBC_ADDONS_LIST != "" )

comment "WARNING !!!                                            "

comment "|  For glibc >= 2.8, it can happen that the tarballs    "

comment "|  for the addons are not available for download.       "

comment "|  If that happens, bad luck... Try a previous version  "

comment "|  or try again later... :-(                            "

endif

if KERNEL_linux

choice LIBC_GLIBC_SUPPORTED_KERNEL

    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_KERNEL_VERSION_CHOSEN

endif # KERNEL_linux