crosstool-ng/config/libc/uClibc.in

# 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_PASSES_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

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.

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