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246 lines
8.7 KiB
Groff
246 lines
8.7 KiB
Groff
# This file contains the common configuration options
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# that apply to both glibc.
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# Some architectures require the ports addon. List them one by one here:
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# This list must be carefully in sync with the architectures names
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# we can find in config/arch/*
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# Ports were integrated into the main tarball in 2.17
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config LIBC_GLIBC_PORTS_EXTERNAL
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def_bool y
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depends on !LIBC_GLIBC_2_17_or_later
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config LIBC_GLIBC_NEEDS_PORTS
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def_bool y
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depends on ARCH_alpha || ARCH_arm || ARCH_m68k || ARCH_mips || ARCH_powerpc
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# Ports are no longer an add-on starting with 2.20
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config LIBC_GLIBC_USE_PORTS
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def_bool y
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depends on LIBC_GLIBC_NEEDS_PORTS && !LIBC_GLIBC_2_20_or_later
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# Force using the BFD linker during the toolchain build
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config LIBC_glibc_family
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bool
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default y
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select BINUTILS_FORCE_LD_BFD_DEFAULT
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config LIBC_GLIBC_EXTRA_CONFIG_ARRAY
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string
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prompt "extra config"
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default ""
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help
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Extra flags to pass onto ./configure when configuring.
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You can enter multiple arguments here, and arguments can contain spaces
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if they are properly quoted (or escaped, but prefer quotes). Eg.:
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--with-foo="1st arg with 4 spaces" --with-bar=2nd-arg-without-space
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config LIBC_GLIBC_CONFIGPARMS
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string
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prompt "Extra config params (READ HELP)"
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default "" if ! ARCH_sh
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default "no-z-defs=yes" if ARCH_sh
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help
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Some architectures need to set options in the file configparms.
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This is the case for sh3/4, which really need to set configparms
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to "no-z-defs=yes" as of gcc-3.4/glibc-2.3.2.
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Unless you are building a toolchain for sh3/4, you should leave that empty.
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Note: If you need to pass more than one value, separate them with
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'\n'. Eg.: var1=val1\nvar2=val2
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config LIBC_GLIBC_EXTRA_CFLAGS
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string
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prompt "extra target CFLAGS"
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default ""
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help
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Extra target CFLAGS to use when building.
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config LIBC_ENABLE_FORTIFIED_BUILD
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bool
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prompt "Enable fortified build (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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help
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If you say 'y' here, then glibc will be using fortified versions
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of functions with format arguments (eg. vsyslog, printf...), and
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do a sanity check on the format at runtime, to avoid some of the
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common format string attacks.
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This is currently not supported, and will most probably result in
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a broken build, with an error message like:
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../misc/syslog.c: In function '__vsyslog_chk':
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../misc/syslog.c:123: sorry, unimplemented: inlining failed in
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call to 'syslog': function body not available
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If you are brave enough and want to debug the issue, then say 'y'
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here. Otherwise, be still and say 'n' (the default). ;-)
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config LIBC_DISABLE_VERSIONING
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bool
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prompt "Disable symbols versioning"
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help
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Do not include versioning information in the library objects.
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config LIBC_OLDEST_ABI
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string
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prompt "Oldest supported ABI"
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default ""
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help
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Set the oldest ABI supported by the C library.
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Setting this option, for example, to 2.2 will provide ABI support
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back to (e)glibc-2.2.
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If this option is not set, (e)glibc will choose for you.
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config LIBC_GLIBC_FORCE_UNWIND
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bool
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prompt "Force unwind support (READ HELP!)"
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default y
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help
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If your toolchain fails building while building the C library
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start files, or the complete C library, with a message like:
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configure: error: forced unwind support is required
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then you may try changing this option. Otherwise, leave it to
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the default 'y'.
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The issue seems to be related to building NPTL on old versions
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of glibc on some architectures
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(seen on s390, s390x and x86_64).
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config LIBC_ADDONS_LIST
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string
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prompt "Extra addons"
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default ""
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help
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Extra addons to include. Space separated list.
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You need to specify neither linuxthreads nor nptl, as they are added
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automagically for you depending on the threading model you chose
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earlier and on libc version selected.
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Also, do not specify ports even if applicable to the selected libc
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version/architecture; it is selected automatically.
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Eg.: libidn
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config LIBC_LOCALES
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bool
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prompt "Build and install locales"
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help
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Whether to build and install the libc locale files for the target,
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which is required in order to support internationalization.
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if LIBC_glibc && LIBC_LOCALES
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comment "WARNING! "
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comment "| The built locales will be usable if and only if the build "
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comment "| machine and the target: "
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comment "| - have the same endianness, "
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comment "| - and have the same alignment requirements for uint32_t. "
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comment "| You will have to check by yourself (for now). "
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comment "WARNING! "
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comment "| Building GLIBC locales requires that GLIBC supports "
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comment "| the build machine as the target. "
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endif # LIBC_glibc && LIBC_LOCALES
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if KERNEL_linux
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choice LIBC_GLIBC_SUPPORTED_KERNEL
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bool
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prompt "Minimum supported kernel version"
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default LIBC_GLIBC_KERNEL_VERSION_AS_HEADERS
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config LIBC_GLIBC_KERNEL_VERSION_NONE
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bool
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prompt "Let ./configure decide"
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help
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Let ./configure decide what minimum kernel version glibc will be
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able to run against.
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This will include legacy compatibility code for older kernels in
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the C library, thus ensuring that it will run on a large number
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of old kernels.
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The minimum kernel version supported will be dependent upon the
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target you build for. For example:
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alpha*-*-linux-gnu Requires Linux 2.6.9 for NPTL
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sh[34]-*-linux-gnu Requires Linux 2.6.11
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powerpc* Requires Linux 2.4.19
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arm*-*-linux-*gnueabi Requires Linux 2.6.16
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config LIBC_GLIBC_KERNEL_VERSION_AS_HEADERS
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bool
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prompt "Same as kernel headers (default)"
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help
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Normally, you'll want glibc to run against the same kernel
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version as the one used for the headers.
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This is the default.
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If enabled, crosstool-ng will use the chosen version of kernel
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headers for the glibc minimum kernel version supported, which is
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what gets passed to "--enable-kernel=" when configuring glibc.
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Enabling this will ensure that no legacy compatibility code for
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older kernels is built into your C libraries, but it will
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be unable to run on kernel versions older than whichever kernel
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headers version you've built the toolchain for.
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If you know for sure that your toolchain will never need to build
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applications that will run under a kernel version older than your
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chosen kernel headers version (CT_KERNEL_VERSION), you can choose
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"y" here.
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config LIBC_GLIBC_KERNEL_VERSION_CHOSEN
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bool
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prompt "Specific kernel version"
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help
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Specify the earliest Linux kernel version you want glibc to
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include support for. This does not have to match the kernel
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headers version used for your toolchain. This controls what is
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passed to the "--enable-kernel=" option to the glibc configure
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script.
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If you want to be able to statically link programs with your
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toolchain's C library, make sure this kernel version is lower than
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all kernels you wish to support to avoid "FATAL: kernel too old"
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errors. The higher the version you specify, the less legacy code
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will be built into libc.
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Most people can leave this at the default value of "2.6.9".
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if LIBC_GLIBC_KERNEL_VERSION_CHOSEN
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config LIBC_GLIBC_MIN_KERNEL_VERSION
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string
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prompt "Minimum kernel version to support"
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default "2.6.9"
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help
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Enter here the lowest kernel version glibc will be able to run against.
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The minimum kernel version supported will be dependent upon the
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target you build for. For example:
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alpha*-*-linux-gnu Requires Linux 2.6.9 for NPTL
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sh[34]-*-linux-gnu Requires Linux 2.6.11
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powerpc* Requires Linux 2.4.19
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arm*-*-linux-*gnueabi Requires Linux 2.6.16
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Note that no sanity check is performed by crosstool-NG to ensure
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that the value you enter here is appropriate for your target.
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endif # LIBC_GLIBC_KERNEL_VERSION_CHOSEN
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endchoice
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config LIBC_GLIBC_MIN_KERNEL
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string
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default "" if LIBC_GLIBC_KERNEL_VERSION_NONE
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default KERNEL_VERSION if LIBC_GLIBC_KERNEL_VERSION_AS_HEADERS
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default LIBC_GLIBC_MIN_KERNEL_VERSION if LIBC_GLIBC_KERNEL_VERSION_CHOSEN
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endif # KERNEL_linux
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