# 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