1 # This file adds functions to build glibc
2 # Copyright 2007 Yann E. MORIN
3 # Licensed under the GPL v2. See COPYING in the root of this package
11 addons_list=($(do_libc_add_ons_list " "))
14 CT_GetFile "glibc-${CT_LIBC_VERSION}" \
15 {ftp,http}://ftp.gnu.org/gnu/glibc \
16 ftp://gcc.gnu.org/pub/glibc/releases \
17 ftp://gcc.gnu.org/pub/glibc/snapshots
20 for addon in "${addons_list[@]}"; do
21 # NPTL addon is not to be downloaded, in any case
22 [ "${addon}" = "nptl" ] && continue || true
23 CT_GetFile "glibc-${addon}-${CT_LIBC_VERSION}" \
24 {ftp,http}://ftp.gnu.org/gnu/glibc \
25 ftp://gcc.gnu.org/pub/glibc/releases \
26 ftp://gcc.gnu.org/pub/glibc/snapshots
36 addons_list=($(do_libc_add_ons_list " "))
38 CT_Extract "glibc-${CT_LIBC_VERSION}"
40 CT_Pushd "${CT_SRC_DIR}/glibc-${CT_LIBC_VERSION}"
41 CT_Patch nochdir "glibc" "${CT_LIBC_VERSION}"
44 for addon in "${addons_list[@]}"; do
45 # NPTL addon is not to be extracted, in any case
46 [ "${addon}" = "nptl" ] && continue || true
47 CT_Extract nochdir "glibc-${addon}-${CT_LIBC_VERSION}"
49 # Some addons have the 'long' name, while others have the
50 # 'short' name, but patches are non-uniformly built with
51 # either the 'long' or 'short' name, whatever the addons name
52 # so we have to make symlinks from the existing to the missing
53 # Fortunately for us, [ -d foo ], when foo is a symlink to a
54 # directory, returns true!
55 [ -d "${addon}" ] || CT_DoExecLog ALL ln -s "glibc-${addon}-${CT_LIBC_VERSION}" "${addon}"
56 [ -d "glibc-${addon}-${CT_LIBC_VERSION}" ] || CT_DoExecLog ALL ln -s "${addon}" "glibc-${addon}-${CT_LIBC_VERSION}"
57 CT_Patch nochdir "glibc" "${addon}-${CT_LIBC_VERSION}"
60 # The configure files may be older than the configure.in files
61 # if using a snapshot (or even some tarballs). Fake them being
64 find . -type f -name configure -exec touch {} \; 2>&1 |CT_DoLog ALL
71 # There is nothing to do for glibc check config
72 do_libc_check_config() {
76 # This function installs the glibc headers needed to build the core compiler
81 CT_DoStep INFO "Installing C library headers"
83 mkdir -p "${CT_BUILD_DIR}/build-libc-headers"
84 cd "${CT_BUILD_DIR}/build-libc-headers"
86 CT_DoLog EXTRA "Configuring C library"
88 # The x86 arch needs special care... Bizarelly enough... :-(
89 case "${CT_ARCH}:${CT_ARCH_BITNESS}" in
90 x86:32) arch4hdrs="i386";;
91 x86:64) arch4hdrs="x86_64";;
92 *) arch4hdrs="${CT_ARCH}";;
95 # The following three things have to be done to build glibc-2.3.x, but they don't hurt older versions.
96 # 1. override CC to keep glibc's configure from using $TARGET-gcc.
97 # 2. disable linuxthreads, which needs a real cross-compiler to generate tcb-offsets.h properly
98 # 3. build with gcc 3.2 or later
99 # Compare these options with the ones used when building glibc for real below - they're different.
100 # As of glibc-2.3.2, to get this step to work for hppa-linux, you need --enable-hacker-mode
101 # so when configure checks to make sure gcc has access to the assembler you just built...
102 # Alternately, we could put ${PREFIX}/${TARGET}/bin on the path.
103 # Set --build so maybe we don't have to specify "cross-compiling=yes" below (haven't tried yet)
105 # "*** WARNING: Are you sure you do not want to use the `linuxthreads'"
107 # is ok here, since all we want are the basic headers at this point.
108 # Override libc_cv_ppc_machine so glibc-cvs doesn't complain
109 # 'a version of binutils that supports .machine "altivec" is needed'.
111 # We need to remove any threading addon when installing headers
112 addons_list="$(do_libc_add_ons_list " " \
113 |sed -r -e 's/\<(nptl|linuxthreads)\>/ /g;' \
114 -e 's/ +/,/g; s/^,+//; s/,+$//;' \
117 extra_config+=("--enable-add-ons=${addons_list}")
119 extra_config+=("${addons_config}")
120 extra_config+=("$(do_libc_min_kernel_config)")
122 # Pre-seed the configparms file with values from the config option
123 printf "${CT_LIBC_GLIBC_CONFIGPARMS}\n" > configparms
125 cross_cc=$(CT_Which "${CT_TARGET}-gcc")
126 CT_DoLog DEBUG "Using gcc for target: '${cross_cc}'"
127 CT_DoLog DEBUG "Extra config passed : '${extra_config[*]}'"
129 libc_cv_ppc_machine=yes \
130 libc_cv_mlong_double_128=yes \
131 libc_cv_mlong_double_128ibm=yes \
134 "${CT_SRC_DIR}/glibc-${CT_LIBC_VERSION}/configure" \
135 --build="${CT_BUILD}" \
136 --host="${CT_TARGET}" \
138 --with-headers="${CT_HEADERS_DIR}" \
140 --disable-sanity-checks \
141 --enable-hacker-mode \
142 "${extra_config[@]}" \
145 CT_DoLog EXTRA "Installing C library headers"
147 # Note: BOOTSTRAP_GCC (see above)
148 libc_cv_ppc_machine=yes \
150 make cross-compiling=yes \
151 install_root=${CT_SYSROOT_DIR} \
152 CFLAGS="-O2 -DBOOTSTRAP_GCC" \
153 ${LIBC_SYSROOT_ARG} \
154 OBJDUMP_FOR_HOST="${CT_TARGET}-objdump" \
155 PARALLELMFLAGS="${PARALLELMFLAGS}" \
158 # Two headers -- stubs.h and features.h -- aren't installed by install-headers,
159 # so do them by hand. We can tolerate an empty stubs.h for the moment.
160 # See e.g. http://gcc.gnu.org/ml/gcc/2002-01/msg00900.html
161 mkdir -p "${CT_HEADERS_DIR}/gnu"
162 CT_DoExecLog ALL touch "${CT_HEADERS_DIR}/gnu/stubs.h"
163 CT_DoExecLog ALL cp -v "${CT_SRC_DIR}/glibc-${CT_LIBC_VERSION}/include/features.h" \
164 "${CT_HEADERS_DIR}/features.h"
166 # Building the bootstrap gcc requires either setting inhibit_libc, or
167 # having a copy of stdio_lim.h... see
168 # http://sources.redhat.com/ml/libc-alpha/2003-11/msg00045.html
169 CT_DoExecLog ALL cp -v bits/stdio_lim.h "${CT_HEADERS_DIR}/bits/stdio_lim.h"
171 # Following error building gcc-4.0.0's gcj:
172 # error: bits/syscall.h: No such file or directory
173 # solved by following copy; see http://sourceware.org/ml/crossgcc/2005-05/msg00168.html
174 # but it breaks arm, see http://sourceware.org/ml/crossgcc/2006-01/msg00091.html
175 [ "${CT_ARCH}" != "arm" ] && CT_DoExecLog ALL cp -v misc/syscall-list.h "${CT_HEADERS_DIR}/bits/syscall.h" || true
177 # Those headers are to be manually copied so gcc can build properly
178 pthread_h="${CT_SRC_DIR}/glibc-${CT_LIBC_VERSION}/${CT_THREADS}/sysdeps/pthread/pthread.h"
180 case "${CT_THREADS}" in
182 # NOTE: for some archs, the pathes are different, but they are not
183 # supported by crosstool-NG right now. See original crosstool when they are.
184 pthread_h="${CT_SRC_DIR}/glibc-${CT_LIBC_VERSION}/${CT_THREADS}/sysdeps/pthread/pthread.h"
185 pthreadtypes_h="${CT_SRC_DIR}/glibc-${CT_LIBC_VERSION}/nptl/sysdeps/unix/sysv/linux/${arch4hdrs}/bits/pthreadtypes.h"
186 if [ ! -f "${pthreadtypes_h}" ]; then
187 pthreadtypes_h="${CT_SRC_DIR}/glibc-${CT_LIBC_VERSION}/ports/sysdeps/unix/sysv/linux/${arch4hdrs}/nptl/bits/pthreadtypes.h"
191 pthreadtypes_h="${CT_SRC_DIR}/glibc-${CT_LIBC_VERSION}/linuxthreads/sysdeps/pthread/bits/pthreadtypes.h"
198 if [ -n "${pthread_h}" ]; then
199 CT_DoExecLog ALL cp -v "${pthread_h}" "${CT_HEADERS_DIR}/pthread.h"
201 if [ -n "${pthreadtypes_h}" ]; then
202 CT_DoExecLog ALL cp -v "${pthreadtypes_h}" "${CT_HEADERS_DIR}/bits/pthreadtypes.h"
208 # Build and install start files
209 do_libc_start_files() {
210 local -a extra_config
212 # Needed only in the NPTL case. Otherwise, return.
213 [ "${CT_THREADS}" = "nptl" ] || return 0
215 CT_DoStep INFO "Installing C library start files"
217 mkdir -p "${CT_BUILD_DIR}/build-libc-startfiles"
218 cd "${CT_BUILD_DIR}/build-libc-startfiles"
220 CT_DoLog EXTRA "Configuring C library"
222 # Add some default glibc config options if not given by user.
223 case "${CT_LIBC_GLIBC_EXTRA_CONFIG}" in
225 *) extra_config+=("--with-tls")
227 case "${CT_SHARED_LIBS}" in
228 y) extra_config+=("--enable-shared");;
229 *) extra_config+=("--disable-shared");;
231 case "${CT_ARCH_FLOAT_HW},${CT_ARCH_FLOAT_SW}" in
232 y,) extra_config+=("--with-fp");;
233 ,y) extra_config+=("--without-fp");;
235 # Obviously, we want threads, as we come here only for NPTL
236 extra_config+=("--with-__thread")
238 addons_config="--enable-add-ons=$(do_libc_add_ons_list ,)"
239 extra_config+=("${addons_config}")
241 extra_config+=("$(do_libc_min_kernel_config)")
243 # Add some default CC args
244 glibc_version="$( grep -E '\<VERSION\>' "${CT_SRC_DIR}/glibc-${CT_LIBC_VERSION}/version.h" \
247 glibc_version_major=$(echo ${glibc_version} |sed -r -e 's/^([[:digit:]]+).*/\1/')
248 glibc_version_minor=$(echo ${glibc_version} |sed -r -e 's/^[[:digit:]]+[\.-_]([[:digit:]]+).*/\1/')
249 if [ ${glibc_version_major} -eq 2 -a ${glibc_version_minor} -ge 6 \
250 -o ${glibc_version_major} -gt 2 ]; then
251 # Don't use -pipe: configure chokes on it for glibc >= 2.6.
252 CT_Test 'Removing "-pipe" for use with glibc>=2.6' "${CT_USE_PIPES}" = "y"
253 extra_cc_args="${CT_CFLAGS_FOR_HOST/-pipe}"
255 extra_cc_args="${CT_CFLAGS_FOR_HOST}"
257 extra_cc_args="${extra_cc_args} ${CT_ARCH_ENDIAN_OPT}"
259 cross_cc=$(CT_Which "${CT_TARGET}-gcc")
260 CT_DoLog DEBUG "Using gcc for target : '${cross_cc}'"
261 CT_DoLog DEBUG "Configuring with addons : '$(do_libc_add_ons_list ,)'"
262 CT_DoLog DEBUG "Extra config args passed: '${extra_config[*]}'"
263 CT_DoLog DEBUG "Extra CC args passed : '${extra_cc_args}'"
265 # Pre-seed the configparms file with values from the config option
266 printf "${CT_LIBC_GLIBC_CONFIGPARMS}\n" > configparms
268 echo "libc_cv_forced_unwind=yes" > config.cache
269 echo "libc_cv_c_cleanup=yes" >> config.cache
271 # Please see the comment for the configure step in do_libc().
273 BUILD_CC="${CT_BUILD}-gcc" \
274 CFLAGS="${CT_TARGET_CFLAGS} ${CT_LIBC_GLIBC_EXTRA_CFLAGS} -O2" \
275 CC="${cross_cc} ${CT_LIBC_EXTRA_CC_ARGS} ${extra_cc_args}" \
277 RANLIB=${CT_TARGET}-ranlib \
279 "${CT_SRC_DIR}/glibc-${CT_LIBC_VERSION}/configure" \
281 --build="${CT_BUILD}" \
282 --host=${CT_TARGET} \
287 --with-headers="${CT_HEADERS_DIR}" \
288 --cache-file=config.cache \
289 "${extra_config[@]}" \
290 ${CT_LIBC_GLIBC_EXTRA_CONFIG}
292 #TODO: should check whether slibdir has been set in configparms to */lib64
293 # and copy the startfiles into the appropriate libdir.
294 CT_DoLog EXTRA "Building C library start files"
295 CT_DoExecLog ALL make OBJDUMP_FOR_HOST="${CT_TARGET}-objdump" \
296 PARALLELMFLAGS="${PARALLELMFLAGS}" \
299 CT_DoLog EXTRA "Installing C library start files"
300 if [ "${CT_USE_SYSROOT}" = "y" ]; then
301 CT_DoExecLog ALL cp -fpv csu/crt[1in].o "${CT_SYSROOT_DIR}/usr/lib/"
303 CT_DoExecLog ALL cp -fpv csu/crt[1in].o "${CT_SYSROOT_DIR}/lib/"
309 # This function builds and install the full glibc
311 local -a extra_config
313 CT_DoStep INFO "Installing C library"
315 mkdir -p "${CT_BUILD_DIR}/build-libc"
316 cd "${CT_BUILD_DIR}/build-libc"
318 CT_DoLog EXTRA "Configuring C library"
320 # Add some default glibc config options if not given by user.
321 # We don't need to be conditional on wether the user did set different
322 # values, as they CT_LIBC_GLIBC_EXTRA_CONFIG is passed after extra_config
324 case "${CT_THREADS}" in
325 nptl) extra_config+=("--with-__thread" "--with-tls");;
326 linuxthreads) extra_config+=("--with-__thread" "--without-tls" "--without-nptl");;
327 none) extra_config+=("--without-__thread" "--without-nptl")
328 case "${CT_LIBC_GLIBC_EXTRA_CONFIG}" in
330 *) extra_config+=("--without-tls");;
335 case "${CT_SHARED_LIBS}" in
336 y) extra_config+=("--enable-shared");;
337 *) extra_config+=("--disable-shared");;
340 case "${CT_ARCH_FLOAT_HW},${CT_ARCH_FLOAT_SW}" in
341 y,) extra_config+=("--with-fp");;
342 ,y) extra_config+=("--without-fp");;
345 if [ "${CT_LIBC_DISABLE_VERSIONING}" = "y" ]; then
346 extra_config+=("--disable-versioning")
349 if [ "${CT_LIBC_OLDEST_ABI}" != "" ]; then
350 extra_config+=("--enable-oldest-abi=${CT_LIBC_OLDEST_ABI}")
353 case "$(do_libc_add_ons_list ,)" in
355 *) extra_config+=("--enable-add-ons=$(do_libc_add_ons_list ,)");;
358 extra_config+=("$(do_libc_min_kernel_config)")
360 # Add some default CC args
361 glibc_version="$( grep -E '\<VERSION\>' "${CT_SRC_DIR}/glibc-${CT_LIBC_VERSION}/version.h" \
364 glibc_version_major=$(echo ${glibc_version} |sed -r -e 's/^([[:digit:]]+).*/\1/')
365 glibc_version_minor=$(echo ${glibc_version} |sed -r -e 's/^[[:digit:]]+[\.-_]([[:digit:]]+).*/\1/')
366 if [ ${glibc_version_major} -eq 2 -a ${glibc_version_minor} -ge 6 \
367 -o ${glibc_version_major} -gt 2 ]; then
368 # Don't use -pipe: configure chokes on it for glibc >= 2.6.
369 CT_Test 'Removing "-pipe" for use with glibc>=2.6' "${CT_USE_PIPES}" = "y"
370 extra_cc_args="${CT_CFLAGS_FOR_HOST/-pipe}"
372 extra_cc_args="${CT_CFLAGS_FOR_HOST}"
374 extra_cc_args="${extra_cc_args} ${CT_ARCH_ENDIAN_OPT}"
376 cross_cc=$(CT_Which "${CT_TARGET}-gcc")
377 CT_DoLog DEBUG "Using gcc for target : '${cross_cc}'"
378 CT_DoLog DEBUG "Configuring with addons : '$(do_libc_add_ons_list ,)'"
379 CT_DoLog DEBUG "Extra config args passed: '${extra_config}'"
380 CT_DoLog DEBUG "Extra CC args passed : '${extra_cc_args}'"
382 # Pre-seed the configparms file with values from the config option
383 printf "${CT_LIBC_GLIBC_CONFIGPARMS}\n" > configparms
385 # For glibc 2.3.4 and later we need to set some autoconf cache
386 # variables, because nptl/sysdeps/pthread/configure.in does not
387 # work when cross-compiling.
388 if [ "${CT_THREADS}" = "nptl" ]; then
389 echo libc_cv_forced_unwind=yes
390 echo libc_cv_c_cleanup=yes
393 # ./configure is mislead by our tools override wrapper for bash
394 # so just tell it where the real bash is _on_the_target_!
396 # - ${ac_cv_path_BASH_SHELL} is only used to set BASH_SHELL
397 # - ${BASH_SHELL} is only used to set BASH
398 # - ${BASH} is only used to set the shebang
399 # in two scripts to run on the target
400 # So we can safely bypass bash detection at compile time.
401 # Should this change in a future glibc release, we'd better
402 # directly mangle the generated scripts _after_ they get built,
403 # or even after they get installed... glibc is such a sucker...
404 echo "ac_cv_path_BASH_SHELL=/bin/bash" >>config.cache
406 # Configure with --prefix the way we want it on the target...
407 # There are a whole lot of settings here. You'll probably want
408 # to read up on what they all mean, and customize a bit, possibly by setting GLIBC_EXTRA_CONFIG
409 # Compare these options with the ones used when installing the glibc headers above - they're different.
410 # Adding "--without-gd" option to avoid error "memusagestat.c:36:16: gd.h: No such file or directory"
411 # See also http://sources.redhat.com/ml/libc-alpha/2000-07/msg00024.html.
412 # Set BUILD_CC, or you won't be able to build datafiles
413 # Set --build, else glibc-2.3.2 will think you're not cross-compiling, and try to run the test programs
415 # OK. I'm fed up with those folks telling me what I should do.
416 # I don't configure nptl? Well, maybe that's purposedly because
417 # I don't want nptl! --disable-sanity-checks will shut up those
418 # silly messages. GNU folks again, he?
420 BUILD_CC="${CT_BUILD}-gcc" \
421 CFLAGS="${CT_TARGET_CFLAGS} ${CT_LIBC_GLIBC_EXTRA_CFLAGS} -O2" \
422 CC="${CT_TARGET}-gcc ${CT_LIBC_EXTRA_CC_ARGS} ${extra_cc_args}" \
424 RANLIB=${CT_TARGET}-ranlib \
426 "${CT_SRC_DIR}/glibc-${CT_LIBC_VERSION}/configure" \
428 --build=${CT_BUILD} \
429 --host=${CT_TARGET} \
434 --disable-sanity-checks \
435 --cache-file=config.cache \
436 --with-headers="${CT_HEADERS_DIR}" \
437 "${extra_config[@]}" \
438 ${CT_LIBC_GLIBC_EXTRA_CONFIG}
440 # glibc initial build hacks
441 # http://sourceware.org/ml/crossgcc/2008-10/msg00068.html
442 case "${CT_ARCH},${CT_ARCH_CPU}" in
444 CT_DoLog DEBUG "Activating support for memset on broken ppc-8xx (CPU15 erratum)"
445 GLIBC_INITIAL_BUILD_ASFLAGS="-DBROKEN_PPC_8xx_CPU15";;
448 # If this fails with an error like this:
449 # ... linux/autoconf.h: No such file or directory
450 # then you need to set the KERNELCONFIG variable to point to a .config file for this arch.
451 # The following architectures are known to need kernel .config: alpha, arm, ia64, s390, sh, sparc
452 # Note: LD and RANLIB needed by glibc-2.1.3's c_stub directory, at least on macosx
453 CT_DoLog EXTRA "Building C library"
454 CT_DoExecLog ALL make LD=${CT_TARGET}-ld \
455 RANLIB=${CT_TARGET}-ranlib \
456 OBJDUMP_FOR_HOST="${CT_TARGET}-objdump" \
457 ASFLAGS="${GLIBC_INITIAL_BUILD_ASFLAGS}" \
458 PARALLELMFLAGS="${PARALLELMFLAGS}" \
461 CT_DoLog EXTRA "Installing C library"
462 CT_DoExecLog ALL make install_root="${CT_SYSROOT_DIR}" \
463 ${LIBC_SYSROOT_ARG} \
464 OBJDUMP_FOR_HOST="${CT_TARGET}-objdump" \
465 PARALLELMFLAGS="${PARALLELMFLAGS}" \
468 # This doesn't seem to work when building a crosscompiler,
469 # as it tries to execute localedef using the just-built ld.so!?
470 #CT_DoLog EXTRA "Installing locales"
471 #make localedata/install-locales install_root=${SYSROOT} 2>&1 |CT_DoLog ALL
473 # Fix problems in linker scripts.
475 # Remove lines containing BUG per http://sources.redhat.com/ml/bug-glibc/2003-05/msg00055.html,
476 # needed to fix gcc-3.2.3/glibc-2.3.2 targeting arm
477 # No need to look into the lib64/ dirs here and there, they point to the
478 # corresponding lib/ directories.
480 # To make "strip *.so.*" not fail (ptxdist does this), rename to .so_orig rather than .so.orig
481 CT_DoLog EXTRA "Fixing C library linker scripts"
482 for file in libc.so libpthread.so libgcc_s.so; do
483 for dir in lib usr/lib; do
484 if [ -f "${CT_SYSROOT_DIR}/${dir}/${file}" -a ! -L ${CT_SYSROOT_DIR}/$lib/$file ]; then
485 CT_DoExecLog ALL cp -v "${CT_SYSROOT_DIR}/${dir}/${file}" "${CT_SYSROOT_DIR}/${dir}/${file}_orig"
486 CT_DoLog DEBUG "Fixing '${CT_SYS_ROOT_DIR}/${dir}/${file}'"
487 CT_DoExecLog ALL sed -i -r -e '/BUG in libc.scripts.output-format.sed/d' "${CT_SYSROOT_DIR}/${dir}/${file}"
495 # This function finishes the glibc install
500 # Build up the addons list, separated with $1
501 do_libc_add_ons_list() {
503 local addons_list=$(echo "${CT_LIBC_ADDONS_LIST}" |sed -r -e "s/[ ,]/${sep}/g;")
504 case "${CT_THREADS}" in
506 *) addons_list="${addons_list}${sep}${CT_THREADS}";;
508 [ "${CT_LIBC_GLIBC_USE_PORTS}" = "y" ] && addons_list="${addons_list}${sep}ports"
509 # Remove duplicate, leading and trailing separators
510 echo "${addons_list}" |sed -r -e "s/${sep}+/${sep}/g; s/^${sep}//; s/${sep}\$//;"
513 # Builds up the minimum supported Linux kernel version
514 do_libc_min_kernel_config() {
515 local min_kernel_config=
516 case "${CT_LIBC_GLIBC_EXTRA_CONFIG}" in
518 *) if [ "${CT_LIBC_GLIBC_KERNEL_VERSION_AS_HEADERS}" = "y" ]; then
519 # We can't rely on the kernel version from the configuration,
520 # because it might not be available if the user uses pre-installed
521 # headers. On the other hand, both method will have the kernel
522 # version installed in "usr/include/linux/version.h" in the sys-root.
523 # Parse that instead of having two code-paths.
524 version_code_file="${CT_SYSROOT_DIR}/usr/include/linux/version.h"
525 if [ ! -f "${version_code_file}" -o ! -r "${version_code_file}" ]; then
526 CT_Abort "Linux version is unavailable in installed headers files"
528 version_code=$(grep -E LINUX_VERSION_CODE "${version_code_file}" |cut -d ' ' -f 3)
529 version=$(((version_code>>16)&0xFF))
530 patchlevel=$(((version_code>>8)&0xFF))
531 sublevel=$((version_code&0xFF))
532 min_kernel_config="--enable-kernel=${version}.${patchlevel}.${sublevel}"
533 elif [ "${CT_LIBC_GLIBC_KERNEL_VERSION_CHOSEN}" = "y" ]; then
534 # Trim the fourth part of the linux version, keeping only the first three numbers
535 min_kernel_config="--enable-kernel=$(echo ${CT_LIBC_GLIBC_MIN_KERNEL_VERSION} |sed -r -e 's/^([^.]+\.[^.]+\.[^.]+)(|\.[^.]+)$/\1/;')"
539 echo "${min_kernel_config}"