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# uClibc options
## depends on ! WINDOWS && ! BARE_METAL
##
## select LIBC_SUPPORT_THREADS_LT
## select LIBC_SUPPORT_THREADS_NONE
## select LIBC_SUPPORT_THREADS_NATIVE if UCLIBC_0_9_33_2_or_later
## select CC_CORE_PASS_1_NEEDED
##
## help The de-facto standard for embeded linux systems.
## help
## help Highly configurable, thus as feature-rich as you
## help need, without compromising for size.
config THREADS
default "nptl" if THREADS_NATIVE
default "linuxthreads" if THREADS_LT
if ARCH_FLOAT_SOFTFP
comment "'softfp' ABI and uClibc is not entirely tested in crosstool-NG"
comment "You may experience issues, although it should work just fine"
endif # ARCH_FLOAT_SOFTFP
config LIBC_UCLIBC_HAS_SUNRPC
bool
default y if !UCLIBC_1_0_23_or_later
config LIBC_UCLIBC_HAS_LIBICONV
bool
default y if UCLIBC_1_0_21_or_later
config LIBC_UCLIBC_PARALLEL
def_bool y
depends on UCLIBC_0_9_33_2_or_later
config LIBC_UCLIBC_NG
def_bool y
depends on UCLIBC_1_0_0_or_later
# uClibc-ng 1.0.15 did away with 2 implementations of linuxthreads
config UCLIBC_MERGED_LINUXTHREADS
def_bool y
depends on UCLIBC_1_0_15_or_later
choice
bool
prompt "uClibc verbosity:"
default LIBC_UCLIBC_VERBOSITY_0
config LIBC_UCLIBC_VERBOSITY_0
bool
prompt "Quiet build"
help
Print terse command indications.
config LIBC_UCLIBC_VERBOSITY_1
bool
prompt "Brief build (show defines, ld flags)"
help
Print simplified command lines.
config LIBC_UCLIBC_VERBOSITY_2
bool
prompt "Very verbose build"
help
Print full command lines.
endchoice
# uClibc-ng has reverted the meaning of V=1 and V=2 compared to its
# ancestor, uClibc, in order to match kernel's Kbuild settings.
# Hence, for uClibc-ng supply V=2 if "brief build" is selected,
# and so forth.
config LIBC_UCLIBC_VERBOSITY
string
default "" if LIBC_UCLIBC_VERBOSITY_0
default "V=2" if LIBC_UCLIBC_VERBOSITY_1 && LIBC_UCLIBC_NG
default "V=1" if LIBC_UCLIBC_VERBOSITY_1
default "V=1" if LIBC_UCLIBC_VERBOSITY_2 && LIBC_UCLIBC_NG
default "V=2" if LIBC_UCLIBC_VERBOSITY_2
choice
bool
prompt "Debug level"
default LIBC_UCLIBC_DEBUG_LEVEL_0
config LIBC_UCLIBC_DEBUG_LEVEL_0
bool
prompt "none"
config LIBC_UCLIBC_DEBUG_LEVEL_1
bool
prompt "minimal"
config LIBC_UCLIBC_DEBUG_LEVEL_2
bool
prompt "normal"
config LIBC_UCLIBC_DEBUG_LEVEL_3
bool
prompt "all"
endchoice
config LIBC_UCLIBC_DEBUG_LEVEL
int
default 0 if LIBC_UCLIBC_DEBUG_LEVEL_0
default 1 if LIBC_UCLIBC_DEBUG_LEVEL_1
default 2 if LIBC_UCLIBC_DEBUG_LEVEL_2
default 3 if LIBC_UCLIBC_DEBUG_LEVEL_3
config LIBC_UCLIBC_CONFIG_FILE
string
prompt "Configuration file"
default ""
help
Path to the configuration file.
If the file is not provided, we fall back to a default config file.
if THREADS_LT && !UCLIBC_MERGED_LINUXTHREADS
choice
bool
prompt "Linuxthread implementation: "
default LIBC_UCLIBC_LNXTHRD_OLD
config LIBC_UCLIBC_LNXTHRD_OLD
bool
prompt "old/stable"
help
From the uClibc config option help:
There are two versions of linuxthreads. The older (stable) version
has been in uClibc for quite a long time but hasn't seen too many
updates other than bugfixes.
config LIBC_UCLIBC_LNXTHRD_NEW
bool
prompt "new"
help
From the uClibc config option help:
The new version has not been tested much, and lacks ports for arches
which glibc does not support (like frv, etc...), but is based on
the latest code from glibc, so it may be the only choice for the
newer ports (like alpha/amd64/64bit arches and hppa).
endchoice
endif # THREADS_LT
config LIBC_UCLIBC_LNXTHRD
string
default "" if THREADS_NONE
default "" if THREADS_NATIVE
default "" if UCLIBC_MERGED_LINUXTHREADS
default "old" if LIBC_UCLIBC_LNXTHRD_OLD
default "new" if LIBC_UCLIBC_LNXTHRD_NEW
config LIBC_UCLIBC_LOCALES
bool
select LIBC_UCLIBC_WCHAR
# Before it became a separate option, libiconv depended on locales
prompt "Add support for locales"
help
Say y if you want uClibc to support localisation.
Note that seems to be broken on recent uClibc releases.
config LIBC_UCLIBC_LIBICONV
bool "Enable iconv"
depends on LIBC_UCLIBC_HAS_LIBICONV
help
Say y if you want to enable <iconv.h> and the corresponding interfaces.
config LIBC_UCLIBC_IPV6
bool
prompt "Add support for IPv6"
help
Say y if you want uClibc to support IPv6.
config LIBC_UCLIBC_WCHAR
bool
prompt "Add support for WCHAR"
help
Say y if you want uClibc to support WCHAR.
Maybe this is needed, if you're building a C++-Compiler
config LIBC_UCLIBC_FENV
bool
prompt "Add support for fenv.h"
default y if ARCH_X86
help
fenv.h provides functions to control the floating point environment,
such as rounding mode, exceptions...
For some architectures, fenv.h is incomplete, so is not installed
by default. x86 is known to have a rather complete fenv.h, so it is
installed by default only for x86.
If you need fenv.h on other architectures, say 'y' here, but you may
encounter some issues.
config LIBC_UCLIBC_RPC
bool
prompt "Add support for RPC"
depends on LIBC_UCLIBC_HAS_SUNRPC
help
Enable support for remote procedure calls (RPC) in uClibc.
config LIBC_UCLIBC_HAS_SSP
bool
prompt "Support stack smashing protection (SSP)"
default y
help
Enable support for building programs with -fstack-protector family
of options. If this option is disabled, one can also use a standalone
libssp library from GCC.
config LIBC_UCLIBC_BUILD_SSP
bool
prompt "Build uClibc with SSP"
depends on LIBC_UCLIBC_HAS_SSP
help
Build uClibc with -fstack-protector. This adds runtime overhead
to many function calls and is disabled by default.
if ARCH_ARM
config LIBC_UCLIBC_USE_GNU_SUFFIX
bool
default y
prompt "Use -uclibcgnueabi suffix"
help
Depending on where the resulting toolchain will be used, you may need
to tweak the "system" part of the target tuple. Buildroot prefers
to have arm-*-linux-uclibcgnueabi; OpenEmbedded prefers
arm-*-linux-uclibceabi. Other tools seem to either accept both, or
don't care about the suffix.
endif
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