1 # This file contains the common configuration options
2 # that apply to both glibc and eglibc.
4 if LIBC_glibc || LIBC_eglibc
6 # Some architectures require the ports addon. List them one by one here:
7 # This list must be carefully in sync with the architectures names
8 # we can find in config/arch/*
11 select LIBC_GLIBC_USE_PORTS
14 select LIBC_GLIBC_USE_PORTS
16 # End of arch-specific ports auto-select
18 comment "glibc/eglibc common options"
20 config LIBC_GLIBC_EXTRA_CONFIG
25 Extra flags to pass onto ./configure when configuring.
27 Eg.: --enable-static-nss
29 config LIBC_GLIBC_CONFIGPARMS
31 prompt "Extra config params (READ HELP)"
32 default "" if ! ARCH_sh
33 default "no-z-defs=yes" if ARCH_sh
35 Some architectures need to set options in the file configparms.
36 This is the case for sh3/4, which really need to set configparms
37 to "no-z-defs=yes" as of gcc-3.4/glibc-2.3.2.
39 Unless you are building a toolchain for sh3/4, you should leave that empty.
41 Note: If you need to pass more than one value, separate them with
42 '\n'. Eg.: var1=val1\nvar2=val2
44 config LIBC_GLIBC_EXTRA_CFLAGS
46 prompt "extra target CFLAGS"
49 Extra target CFLAGS to use when building.
51 config LIBC_EXTRA_CC_ARGS
53 prompt "gcc extra flags"
56 Extra flags to pass gcc when building.
58 Seldom used, except for sparc64 which seems to need the flag -64
59 to be passed onto gcc.
61 config LIBC_DISABLE_VERSIONING
63 prompt "Disable symbols versioning"
66 Do not include versioning information in the library objects.
68 config LIBC_OLDEST_ABI
70 prompt "Oldest supported ABI"
73 Set the oldest ABI supported by the C library.
75 Setting this option, for example, to 2.2 will provide ABI support
78 If this option is not set, (e)glibc will choose for you.
80 config LIBC_GLIBC_FORCE_UNWIND
82 prompt "Force unwind support (READ HELP!)"
85 If your toolchain fails building while building the C library
86 start files, or the complete C library, with a message like:
87 configure: error: forced unwind support is required
89 then you may try setting this to 'y'. Otherwise, leave it to 'n'.
91 The issue seems to be related to building NPTL on old versions
92 of glibc (and possibly eglibc as well) on some architectures
93 (seen on s390, s390x and x86_64).
95 config LIBC_GLIBC_USE_PORTS
97 prompt "Use the ports addon"
100 The ports addon contains some architecture ports that are not available
101 in the official distribution.
103 For example, this is the case for ARM with glibc-2.4 and above.
105 Say n only if you're sure that your architecture is in the official
106 distribution for your chosen version.
108 config LIBC_ADDONS_LIST
110 prompt "Extra addons"
113 Extra addons to include. Space separated list.
115 You need to specify neither linuxthreads nor nptl, as they are added
116 automagically for you depending on the threading model you choosed
119 Eg.: crypt (for very old libces)
121 if LIBC_GLIBC_USE_PORTS || ( LIBC_ADDONS_LIST != "" )
122 comment "WARNING !!! "
123 comment "| For glibc >= 2.8, it can happen that the tarballs "
124 comment "| for the addons are not available for download. "
125 comment "| If that happens, bad luck... Try a previous version "
126 comment "| or try again later... :-( "
133 prompt "Minimum supported kernel version"
134 default LIBC_GLIBC_KERNEL_VERSION_AS_HEADERS
136 config LIBC_GLIBC_KERNEL_VERSION_NONE
138 prompt "Let ./configure decide"
140 Let ./configure decide what minimum kernel version glibc/eglibc
141 will be able to run against.
143 This will inclde legacy compatibility code for older kernels in
144 the C library, thus ensuring that it will run on a large number
147 The minimum kernel version supported will be dependent upon the
148 target you build for. For example:
149 alpha*-*-linux-gnu Requires Linux 2.6.9 for NPTL
150 sh[34]-*-linux-gnu Requires Linux 2.6.11
151 powerpc* Requires Linux 2.4.19
152 arm*-*-linux-*gnueabi Requires Linux 2.6.16
154 config LIBC_GLIBC_KERNEL_VERSION_AS_HEADERS
156 prompt "Same as kernel headers (default)"
158 Normaly, you'll want glibc/eglibc to run against the same kernel
159 version as the one used for the headers.
163 If enabled, crosstool-ng will use the chosen version of kernel
164 headers for the glibc minimum kernel version supported, which is
165 what gets passed to "--enable-kernel=" when configuring glibc.
167 Enabling this will ensure that no legacy compatibility code for
168 older kernels is built into your C libraries, but it will
169 be unable to run on kernel versions older than whichever kernel
170 headers version you've built the toolchain for.
172 If you know for sure that your toolchain will never need to build
173 applications that will run under a kernel version older than your
174 chosen kernel headers version (CT_KERNEL_VERSION), you can choose
177 config LIBC_GLIBC_KERNEL_VERSION_CHOSEN
179 prompt "Specific kernel version"
181 Specify the earliest Linux kernel version you want glibc to
182 include support for. This does not have to match the kernel
183 headers version used for your toolchain. This controls what is
184 passed to the "--enable-kernel=" option to the glibc configure
187 If you want to be able to statically link programs with your
188 toolchain's C library, make sure this kernel version is lower than
189 all kernels you wish to support to avoid "FATAL: kernel too old"
190 errors. The higher the version you specify, the less legacy code
191 will be built into libc.
193 Most people can leave this at the default value of "2.6.9".
195 if LIBC_GLIBC_KERNEL_VERSION_CHOSEN
197 config LIBC_GLIBC_MIN_KERNEL_VERSION
199 prompt "Minimum kernel version to support"
202 Enter here the lowest kernel version glibc/eglibc will be able to
205 The minimum kernel version supported will be dependent upon the
206 target you build for. For example:
207 alpha*-*-linux-gnu Requires Linux 2.6.9 for NPTL
208 sh[34]-*-linux-gnu Requires Linux 2.6.11
209 powerpc* Requires Linux 2.4.19
210 arm*-*-linux-*gnueabi Requires Linux 2.6.16
212 Note that no sanity check is performed by crosstool-NG to ensure
213 that the value you enter here is appropriate for your target.
215 endif # LIBC_GLIBC_KERNEL_VERSION_CHOSEN
219 config LIBC_GLIBC_MIN_KERNEL
221 default "" if LIBC_GLIBC_KERNEL_VERSION_NONE
222 default KERNEL_VERSION if LIBC_GLIBC_KERNEL_VERSION_AS_HEADERS
223 default LIBC_GLIBC_MIN_KERNEL_VERSION if LIBC_GLIBC_KERNEL_VERSION_CHOSEN
227 endif # LIBC_glibc || LIBC_eglibc