# C library options

config LIBC

    string

    default "none"   if BARE_METAL

    default "glibc"  if LIBC_GLIBC

    default "eglibc" if LIBC_EGLIBC

    default "uClibc" if LIBC_UCLIBC

if ! BARE_METAL

menu "C-library"

config LIBC_VERSION

    string

    help

      Enter the date of the snapshot you want to use in the form: YYYYMMDD

      where YYYY is the 4-digit year, MM the 2-digit month and DD the 2-digit

      day in the month.

      Please note:

      - glibc has snapshots done every monday, and only the last ten are kept.

      - uClibc has daily snapshots, and only the last 30-or-so are kept.

      So if you want to be able to re-build your toolchain later, you will

      have to save your C library tarball by yourself.

choice

    bool

    prompt "C-library to use:"

    default LIBC_GLIBC

config LIBC_GLIBC

    bool

    prompt "glibc"

    select LIBC_SUPPORT_NPTL

    select LIBC_SUPPORT_LINUXTHREADS

config LIBC_EGLIBC

    bool

    prompt "eglibc (EXPERIMENTAL)"

    select LIBC_SUPPORT_NPTL

    select LIBC_SUPPORT_LINUXTHREADS

    depends on EXPERIMENTAL

    help

      EGLIBC (Embedded GLIBC) is a variant of the standard GNU GLIBC

      that is designed to work well on embedded systems.  EGLIBC strives

      to be source and binary compatible with GLIBC.  Its goals include

      a reduced footprint, configurable components, and improved

      cross-compilation support.  EGLIBC also includes some embedded ports

      (such as e500/spe) that are normally separate add-ons of GLIBC.

config LIBC_UCLIBC

    bool

    prompt "uClibc"

    select LIBC_SUPPORT_LINUXTHREADS

endchoice

comment "Common C library options"

config LIBC_SUPPORT_NPTL

    bool

    default n

config LIBC_SUPPORT_LINUXTHREADS

    bool

    default n

config THREADS

    string

    default "nptl"          if THREADS_NPTL

    default "linuxthreads"  if THREADS_LINUXTHREADS

    default "none"          if THREADS_NONE

choice

    bool

    prompt "Threading implementation to use:"

    default THREADS_NPTL           if LIBC_SUPPORT_NPTL

    default THREADS_LINUXTHREADS   if LIBC_SUPPORT_LINUXTHREADS && ! LIBC_SUPPORT_NPTL

    default THREADS_NONE           if ! LIBC_SUPPORT_LINUXTHREADS && ! LIBC_SUPPORT_NPTL

config THREADS_NPTL

    bool

    prompt "nptl"

    depends on LIBC_SUPPORT_NPTL

config THREADS_LINUXTHREADS

    bool

    prompt "linuxthreads"

    depends on LIBC_SUPPORT_LINUXTHREADS

config THREADS_NONE

    bool

    prompt "none"

endchoice

if LIBC_GLIBC

source config/libc/glibc.in

endif

if LIBC_EGLIBC

source config/libc/eglibc.in

endif

# Hack: mconf does not allow to include a file multiple times,

# so include glibc and eglibc common options from here, rather

# than from each config files.

if LIBC_GLIBC || LIBC_EGLIBC

source config/libc/glibc-eglibc-common.in

endif

if LIBC_UCLIBC

source config/libc/uClibc.in

endif

endmenu

endif # ! BARE_METAL