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# 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
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