# This file contains the common configuration options

 # that apply to both glibc and eglibc.

 if LIBC_glibc || LIBC_eglibc

 # Force using the BFD linker during the toolchain build

 config LIBC_glibc_familly

     bool

     default y

     select BINUTILS_FORCE_LD_BFD

 # 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 ARCH_arm

     select LIBC_GLIBC_USE_PORTS

 config ARCH_mips

     select LIBC_GLIBC_USE_PORTS

 # End of arch-specific ports auto-select

 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_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

     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

 endif # LIBC_glibc || LIBC_eglibc