csrc/crosstool-ng-1.19.0/config/libc/newlib.in

# newlib options

## depends on BARE_METAL
##
## select LIBC_SUPPORT_THREADS_NONE
## select CC_CORE_PASSES_NEEDED
##
## help Newlib is a C library intended for use on embedded systems. It is a
## help conglomeration of several library parts, all under free software
## help licenses that make them easily usable on embedded products. Newlib
## help is only available in source form. It can be compiled for a wide
## help array of processors, and will usually work on any architecture with
## help the addition of a few low-level routines.

choice
    bool
    prompt "newlib version"
# Don't remove next line
# CT_INSERT_VERSION_BELOW

config LIBC_NEWLIB_V_2_0_0
    bool
    prompt "2.0.0 (EXPERIMENTAL)"
    depends on EXPERIMENTAL

config LIBC_NEWLIB_V_1_20_0
    bool
    prompt "1.20.0"

config LIBC_NEWLIB_V_1_19_0
    bool
    prompt "1.19.0"

config LIBC_NEWLIB_V_1_18_0
    bool
    prompt "1.18.0"

config LIBC_NEWLIB_V_1_17_0
    bool
    prompt "1.17.0"

config LIBC_NEWLIB_CUSTOM
    bool
    prompt "Custom newlib"
    depends on EXPERIMENTAL

endchoice

if LIBC_NEWLIB_CUSTOM

config LIBC_NEWLIB_CUSTOM_LOCATION
    string
    prompt "Full path to custom newlib source"
    default ""
    help
      Enter the path to the directory (or tarball) of your source for newlib,
      or leave blank to use default CT_CUSTOM_LOCATION_ROOT_DIR/newlib

endif # LIBC_NEWLIB_CUSTOM

config LIBC_VERSION
    string
# Don't remove next line
# CT_INSERT_VERSION_STRING_BELOW
    default "2.0.0" if LIBC_NEWLIB_V_2_0_0
    default "1.20.0" if LIBC_NEWLIB_V_1_20_0
    default "1.19.0" if LIBC_NEWLIB_V_1_19_0
    default "1.18.0" if LIBC_NEWLIB_V_1_18_0
    default "1.17.0" if LIBC_NEWLIB_V_1_17_0
    default "custom" if LIBC_NEWLIB_CUSTOM
    help
      Enter the tag you want to use.
      Leave empty to use the 'head' of the repository.

comment "Architecture specific options"

config ATMEL_AVR32_HEADERS
    bool
    prompt "Install Atmel AVR32 headers"
    depends on ARCH_avr32
    default y
    help
      Install Atmel AVR32 headers for native AVR32 development. Most
      AVR32 MCU devices are supported.
      
      If you do native AVR32 development you want to say 'Y' here.