1 # Copyright 1999-2016 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
5 # @ECLASS: linux-info.eclass
9 # Original author: John Mylchreest <johnm@gentoo.org>
10 # @BLURB: eclass used for accessing kernel related information
12 # This eclass is used as a central eclass for accessing kernel
13 # related information for source or binary already installed.
14 # It is vital for linux-mod.eclass to function correctly, and is split
15 # out so that any ebuild behaviour "templates" are abstracted out
16 # using additional eclasses.
18 # "kernel config" in this file means:
19 # The .config of the currently installed sources is used as the first
20 # preference, with a fall-back to bundled config (/proc/config.gz) if available.
22 # Before using any of the config-handling functions in this eclass, you must
23 # ensure that one of the following functions has been called (in order of
24 # preference), otherwise you will get bugs like #364041):
25 # linux-info_pkg_setup
26 # linux-info_get_any_version
30 # A Couple of env vars are available to effect usage of this eclass
31 # These are as follows:
33 # @ECLASS-VARIABLE: KERNEL_DIR
35 # A string containing the directory of the target kernel sources. The default value is
38 # @ECLASS-VARIABLE: CONFIG_CHECK
40 # A string containing a list of .config options to check for before
41 # proceeding with the install.
43 # e.g.: CONFIG_CHECK="MTRR"
45 # You can also check that an option doesn't exist by
46 # prepending it with an exclamation mark (!).
48 # e.g.: CONFIG_CHECK="!MTRR"
50 # To simply warn about a missing option, prepend a '~'.
51 # It may be combined with '!'.
53 # In general, most checks should be non-fatal. The only time fatal checks should
54 # be used is for building kernel modules or cases that a compile will fail
57 # This is to allow usage of binary kernels, and minimal systems without kernel
60 # @ECLASS-VARIABLE: ERROR_<CFG>
62 # A string containing the error message to display when the check against CONFIG_CHECK
63 # fails. <CFG> should reference the appropriate option used in CONFIG_CHECK.
65 # e.g.: ERROR_MTRR="MTRR exists in the .config but shouldn't!!"
67 # @ECLASS-VARIABLE: KBUILD_OUTPUT
69 # A string passed on commandline, or set from the kernel makefile. It contains the directory
70 # which is to be used as the kernel object directory.
72 # There are also a couple of variables which are set by this, and shouldn't be
73 # set by hand. These are as follows:
75 # @ECLASS-VARIABLE: KV_FULL
77 # A read-only variable. It's a string containing the full kernel version. ie: 2.6.9-gentoo-johnm-r1
79 # @ECLASS-VARIABLE: KV_MAJOR
81 # A read-only variable. It's an integer containing the kernel major version. ie: 2
83 # @ECLASS-VARIABLE: KV_MINOR
85 # A read-only variable. It's an integer containing the kernel minor version. ie: 6
87 # @ECLASS-VARIABLE: KV_PATCH
89 # A read-only variable. It's an integer containing the kernel patch version. ie: 9
91 # @ECLASS-VARIABLE: KV_EXTRA
93 # A read-only variable. It's a string containing the kernel EXTRAVERSION. ie: -gentoo
95 # @ECLASS-VARIABLE: KV_LOCAL
97 # A read-only variable. It's a string containing the kernel LOCALVERSION concatenation. ie: -johnm
99 # @ECLASS-VARIABLE: KV_DIR
101 # A read-only variable. It's a string containing the kernel source directory, will be null if
102 # KERNEL_DIR is invalid.
104 # @ECLASS-VARIABLE: KV_OUT_DIR
106 # A read-only variable. It's a string containing the kernel object directory, will be KV_DIR unless
107 # KBUILD_OUTPUT is used. This should be used for referencing .config.
109 # And to ensure all the weirdness with crosscompile
110 inherit toolchain-funcs versionator
112 EXPORT_FUNCTIONS pkg_setup
114 # Overwritable environment Var's
115 # ---------------------------------------
116 KERNEL_DIR="${KERNEL_DIR:-${ROOT}usr/src/linux}"
122 ppc) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
123 ppc64) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
126 # @FUNCTION: set_arch_to_kernel
128 # Set the env ARCH to match what the kernel expects.
129 set_arch_to_kernel() { export ARCH=$(tc-arch-kernel); }
130 # @FUNCTION: set_arch_to_portage
132 # Set the env ARCH to match what portage expects.
133 set_arch_to_portage() { export ARCH=$(tc-arch); }
136 # -------------------
137 # qeinfo is a quiet einfo call when EBUILD_PHASE
138 # should not have visible output.
144 case "${EBUILD_PHASE}" in
145 depend) unset outputmsg;;
146 clean) unset outputmsg;;
147 preinst) unset outputmsg;;
149 [ -n "${outputmsg}" ] && ${type} "${outputmsg}"
152 qeinfo() { qout einfo "${@}" ; }
153 qewarn() { qout ewarn "${@}" ; }
154 qeerror() { qout eerror "${@}" ; }
157 # ---------------------------------------
159 # @FUNCTION: getfilevar
160 # @USAGE: variable configfile
161 # @RETURN: the value of the variable
163 # It detects the value of the variable defined in the file configfile. This is
164 # done by including the configfile, and printing the variable with Make.
165 # It WILL break if your makefile has missing dependencies!
167 local ERROR basefname basedname myARCH="${ARCH}" M="${S}"
170 [ -z "${1}" ] && ERROR=1
171 [ ! -f "${2}" ] && ERROR=1
173 if [ "${ERROR}" = 1 ]
176 eerror "getfilevar requires 2 variables, with the second a valid file."
177 eerror " getfilevar <VARIABLE> <CONFIGFILE>"
179 basefname="$(basename ${2})"
180 basedname="$(dirname ${2})"
183 # We use nonfatal because we want the caller to take care of things #373151
184 [[ ${EAPI:-0} == [0123] ]] && nonfatal() { "$@"; }
185 case ${EBUILD_PHASE_FUNC} in
186 pkg_info|pkg_nofetch|pkg_pretend) M="${T}" ;;
188 echo -e "e:\\n\\t@echo \$(${1})\\ninclude ${basefname}" | \
189 nonfatal emake -C "${basedname}" M="${M}" ${BUILD_FIXES} -s -f - 2>/dev/null
195 # @FUNCTION: getfilevar_noexec
196 # @USAGE: variable configfile
197 # @RETURN: the value of the variable
199 # It detects the value of the variable defined in the file configfile.
200 # This is done with sed matching an expression only. If the variable is defined,
201 # you will run into problems. See getfilevar for those cases.
202 getfilevar_noexec() {
203 local ERROR basefname basedname mycat myARCH="${ARCH}"
207 [ -z "${1}" ] && ERROR=1
208 [ ! -f "${2}" ] && ERROR=1
209 [ "${2%.gz}" != "${2}" ] && mycat='zcat'
211 if [ "${ERROR}" = 1 ]
214 eerror "getfilevar_noexec requires 2 variables, with the second a valid file."
215 eerror " getfilevar_noexec <VARIABLE> <CONFIGFILE>"
219 -e "/^[[:space:]]*${1}[[:space:]]*:\\?=[[:space:]]*\(.*\)\$/{
220 s,^[^=]*[[:space:]]*=[[:space:]]*,,g ;
221 s,[[:space:]]*\$,,g ;
227 # @ECLASS-VARIABLE: _LINUX_CONFIG_EXISTS_DONE
230 # This is only set if one of the linux_config_*exists functions has been called.
231 # We use it for a QA warning that the check for a config has not been performed,
232 # as linux_chkconfig* in non-legacy mode WILL return an undefined value if no
233 # config is available at all.
234 _LINUX_CONFIG_EXISTS_DONE=
236 linux_config_qa_check() {
238 if [ -z "${_LINUX_CONFIG_EXISTS_DONE}" ]; then
239 ewarn "QA: You called $f before any linux_config_exists!"
240 ewarn "QA: The return value of $f will NOT guaranteed later!"
244 # @FUNCTION: linux_config_src_exists
245 # @RETURN: true or false
247 # It returns true if .config exists in a build directory otherwise false
248 linux_config_src_exists() {
249 export _LINUX_CONFIG_EXISTS_DONE=1
250 [[ -n ${KV_OUT_DIR} && -s ${KV_OUT_DIR}/.config ]]
253 # @FUNCTION: linux_config_bin_exists
254 # @RETURN: true or false
256 # It returns true if .config exists in /proc, otherwise false
257 linux_config_bin_exists() {
258 export _LINUX_CONFIG_EXISTS_DONE=1
259 [[ -s /proc/config.gz ]]
262 # @FUNCTION: linux_config_exists
263 # @RETURN: true or false
265 # It returns true if .config exists otherwise false
267 # This function MUST be checked before using any of the linux_chkconfig_*
269 linux_config_exists() {
270 linux_config_src_exists || linux_config_bin_exists
273 # @FUNCTION: linux_config_path
275 # Echo the name of the config file to use. If none are found,
277 linux_config_path() {
278 if linux_config_src_exists; then
279 echo "${KV_OUT_DIR}/.config"
280 elif linux_config_bin_exists; then
281 echo "/proc/config.gz"
287 # @FUNCTION: require_configured_kernel
289 # This function verifies that the current kernel is configured (it checks against the existence of .config)
291 require_configured_kernel() {
292 if ! linux_config_src_exists; then
293 qeerror "Could not find a usable .config in the kernel source directory."
294 qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources."
295 qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that"
296 qeerror "it points to the necessary object directory so that it might find .config."
297 die "Kernel not configured; no .config found in ${KV_OUT_DIR}"
301 # @FUNCTION: linux_chkconfig_present
303 # @RETURN: true or false
305 # It checks that CONFIG_<option>=y or CONFIG_<option>=m is present in the current kernel .config
306 # If linux_config_exists returns false, the results of this are UNDEFINED. You
307 # MUST call linux_config_exists first.
308 linux_chkconfig_present() {
309 linux_config_qa_check linux_chkconfig_present
310 [[ $(getfilevar_noexec "CONFIG_$1" "$(linux_config_path)") == [my] ]]
313 # @FUNCTION: linux_chkconfig_module
315 # @RETURN: true or false
317 # It checks that CONFIG_<option>=m is present in the current kernel .config
318 # If linux_config_exists returns false, the results of this are UNDEFINED. You
319 # MUST call linux_config_exists first.
320 linux_chkconfig_module() {
321 linux_config_qa_check linux_chkconfig_module
322 [[ $(getfilevar_noexec "CONFIG_$1" "$(linux_config_path)") == m ]]
325 # @FUNCTION: linux_chkconfig_builtin
327 # @RETURN: true or false
329 # It checks that CONFIG_<option>=y is present in the current kernel .config
330 # If linux_config_exists returns false, the results of this are UNDEFINED. You
331 # MUST call linux_config_exists first.
332 linux_chkconfig_builtin() {
333 linux_config_qa_check linux_chkconfig_builtin
334 [[ $(getfilevar_noexec "CONFIG_$1" "$(linux_config_path)") == y ]]
337 # @FUNCTION: linux_chkconfig_string
339 # @RETURN: CONFIG_<option>
341 # It prints the CONFIG_<option> value of the current kernel .config (it requires a configured kernel).
342 # If linux_config_exists returns false, the results of this are UNDEFINED. You
343 # MUST call linux_config_exists first.
344 linux_chkconfig_string() {
345 linux_config_qa_check linux_chkconfig_string
346 getfilevar_noexec "CONFIG_$1" "$(linux_config_path)"
349 # Versioning Functions
350 # ---------------------------------------
352 # @FUNCTION: kernel_is
353 # @USAGE: [-lt -gt -le -ge -eq] major_number [minor_number patch_number]
354 # @RETURN: true or false
356 # It returns true when the current kernel version satisfies the comparison against the passed version.
357 # -eq is the default comparison.
360 # For Example where KV = 2.6.9
361 # kernel_is 2 4 returns false
362 # kernel_is 2 returns true
363 # kernel_is 2 6 returns true
364 # kernel_is 2 6 8 returns false
365 # kernel_is 2 6 9 returns true
368 # Note: duplicated in kernel-2.eclass
370 # if we haven't determined the version yet, we need to.
371 linux-info_get_any_version
373 # Now we can continue
374 local operator test value
377 lt) operator="-lt"; shift;;
378 gt) operator="-gt"; shift;;
379 le) operator="-le"; shift;;
380 ge) operator="-ge"; shift;;
381 eq) operator="-eq"; shift;;
384 [[ $# -gt 3 ]] && die "Error in kernel-2_kernel_is(): too many parameters"
386 : $(( test = (KV_MAJOR << 16) + (KV_MINOR << 8) + KV_PATCH ))
387 : $(( value = (${1:-${KV_MAJOR}} << 16) + (${2:-${KV_MINOR}} << 8) + ${3:-${KV_PATCH}} ))
388 [ ${test} ${operator} ${value} ]
394 # ignore files with ~ in it.
395 for i in $(ls ${1}/localversion* 2>/dev/null); do
396 [[ -n ${i//*~*} ]] && lv_list="${lv_list} ${i}"
399 for i in ${lv_list}; do
406 # Check if the Makefile is valid for direct parsing.
407 # Check status results:
408 # - PASS, use 'getfilevar' to extract values
409 # - FAIL, use 'getfilevar_noexec' to extract values
410 # The check may fail if:
411 # - make is not present
412 # - corruption exists in the kernel makefile
413 get_makefile_extract_function() {
414 local a='' b='' mkfunc='getfilevar'
415 a="$(getfilevar VERSION ${KERNEL_MAKEFILE})"
416 b="$(getfilevar_noexec VERSION ${KERNEL_MAKEFILE})"
417 [[ "${a}" != "${b}" ]] && mkfunc='getfilevar_noexec'
421 # internal variable, so we know to only print the warning once
422 get_version_warning_done=
424 # @FUNCTION: get_version
426 # It gets the version of the kernel inside KERNEL_DIR and populates the KV_FULL variable
427 # (if KV_FULL is already set it does nothing).
429 # The kernel version variables (KV_MAJOR, KV_MINOR, KV_PATCH, KV_EXTRA and KV_LOCAL) are also set.
431 # The KV_DIR is set using the KERNEL_DIR env var, the KV_DIR_OUT is set using a valid
432 # KBUILD_OUTPUT (in a decreasing priority list, we look for the env var, makefile var or the
433 # symlink /lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build).
437 # no need to execute this twice assuming KV_FULL is populated.
438 # we can force by unsetting KV_FULL
439 [ -n "${KV_FULL}" ] && return 0
441 # if we dont know KV_FULL, then we need too.
442 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
445 # KV_DIR will contain the full path to the sources directory we should use
446 [ -z "${get_version_warning_done}" ] && \
447 qeinfo "Determining the location of the kernel source code"
448 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
450 if [ -z "${KV_DIR}" ]
452 if [ -z "${get_version_warning_done}" ]; then
453 get_version_warning_done=1
454 qewarn "Unable to find kernel sources at ${KERNEL_DIR}"
455 #qeinfo "This package requires Linux sources."
456 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
457 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
458 qeinfo "(or the kernel you wish to build against)."
459 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
461 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
467 # See if the kernel dir is actually an output dir. #454294
468 if [ -z "${KBUILD_OUTPUT}" -a -L "${KERNEL_DIR}/source" ]; then
469 KBUILD_OUTPUT=${KERNEL_DIR}
470 KERNEL_DIR=$(readlink -f "${KERNEL_DIR}/source")
474 if [ -z "${get_version_warning_done}" ]; then
475 qeinfo "Found kernel source directory:"
479 if [ ! -s "${KV_DIR}/Makefile" ]
481 if [ -z "${get_version_warning_done}" ]; then
482 get_version_warning_done=1
483 qeerror "Could not find a Makefile in the kernel source directory."
484 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
489 # OK so now we know our sources directory, but they might be using
490 # KBUILD_OUTPUT, and we need this for .config and localversions-*
491 # so we better find it eh?
492 # do we pass KBUILD_OUTPUT on the CLI?
493 local OUTPUT_DIR=${KBUILD_OUTPUT}
496 KERNEL_MAKEFILE="${KV_DIR}/Makefile"
498 if [[ -z ${OUTPUT_DIR} ]]; then
499 # Decide the function used to extract makefile variables.
500 local mkfunc=$(get_makefile_extract_function "${KERNEL_MAKEFILE}")
502 # And if we didn't pass it, we can take a nosey in the Makefile.
503 OUTPUT_DIR=$(${mkfunc} KBUILD_OUTPUT "${KERNEL_MAKEFILE}")
506 # And contrary to existing functions I feel we shouldn't trust the
507 # directory name to find version information as this seems insane.
508 # So we parse ${KERNEL_MAKEFILE}. We should be able to trust that
509 # the Makefile is simple enough to use the noexec extract function.
510 # This has been true for every release thus far, and it's faster
511 # than using make to evaluate the Makefile every time.
512 KV_MAJOR=$(getfilevar_noexec VERSION "${KERNEL_MAKEFILE}")
513 KV_MINOR=$(getfilevar_noexec PATCHLEVEL "${KERNEL_MAKEFILE}")
514 KV_PATCH=$(getfilevar_noexec SUBLEVEL "${KERNEL_MAKEFILE}")
515 KV_EXTRA=$(getfilevar_noexec EXTRAVERSION "${KERNEL_MAKEFILE}")
517 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
519 if [ -z "${get_version_warning_done}" ]; then
520 get_version_warning_done=1
521 qeerror "Could not detect kernel version."
522 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
527 # and in newer versions we can also pull LOCALVERSION if it is set.
528 # but before we do this, we need to find if we use a different object directory.
529 # This *WILL* break if the user is using localversions, but we assume it was
530 # caught before this if they are.
531 if [[ -z ${OUTPUT_DIR} ]] ; then
532 # Try to locate a kernel that is most relevant for us.
533 for OUTPUT_DIR in "${SYSROOT}" "${ROOT}" "" ; do
534 OUTPUT_DIR+="/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build"
535 if [[ -e ${OUTPUT_DIR} ]] ; then
541 [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
542 if [ -n "${KV_OUT_DIR}" ];
544 qeinfo "Found kernel object directory:"
545 qeinfo " ${KV_OUT_DIR}"
547 # and if we STILL have not got it, then we better just set it to KV_DIR
548 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
550 # Grab the kernel release from the output directory.
551 # TODO: we MUST detect kernel.release being out of date, and 'return 1' from
553 if [ -s "${KV_OUT_DIR}"/include/config/kernel.release ]; then
554 KV_LOCAL=$(<"${KV_OUT_DIR}"/include/config/kernel.release)
555 elif [ -s "${KV_OUT_DIR}"/.kernelrelease ]; then
556 KV_LOCAL=$(<"${KV_OUT_DIR}"/.kernelrelease)
561 # KV_LOCAL currently contains the full release; discard the first bits.
562 tmplocal=${KV_LOCAL#${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}}
564 # If the updated local version was not changed, the tree is not prepared.
565 # Clear out KV_LOCAL in that case.
566 # TODO: this does not detect a change in the localversion part between
567 # kernel.release and the value that would be generated.
568 if [ "$KV_LOCAL" = "$tmplocal" ]; then
574 # And we should set KV_FULL to the full expanded version
575 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
577 qeinfo "Found sources for kernel version:"
583 # @FUNCTION: get_running_version
585 # It gets the version of the current running kernel and the result is the same as get_version() if the
586 # function can find the sources.
587 get_running_version() {
590 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile && -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
591 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
592 KBUILD_OUTPUT=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
596 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
597 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
601 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
602 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
607 # This handles a variety of weird kernel versions. Make sure to update
608 # tests/linux-info_get_running_version.sh if you want to change this.
609 local kv_full=${KV_FULL//[-+_]*}
610 KV_MAJOR=$(get_version_component_range 1 ${kv_full})
611 KV_MINOR=$(get_version_component_range 2 ${kv_full})
612 KV_PATCH=$(get_version_component_range 3 ${kv_full})
613 KV_EXTRA="${KV_FULL#${KV_MAJOR}.${KV_MINOR}${KV_PATCH:+.${KV_PATCH}}}"
619 # This next function is named with the eclass prefix to avoid conflicts with
620 # some old versionator-like eclass functions.
622 # @FUNCTION: linux-info_get_any_version
624 # This attempts to find the version of the sources, and otherwise falls back to
625 # the version of the running kernel.
626 linux-info_get_any_version() {
628 if [[ $? -ne 0 ]]; then
629 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
635 # ebuild check functions
636 # ---------------------------------------
638 # @FUNCTION: check_kernel_built
640 # This function verifies that the current kernel sources have been already prepared otherwise it dies.
641 check_kernel_built() {
642 # if we haven't determined the version yet, we need to
643 require_configured_kernel
647 if kernel_is -ge 3 7; then
648 versionh_path="include/generated/uapi/linux/version.h"
650 versionh_path="include/linux/version.h"
653 if [ ! -f "${KV_OUT_DIR}/${versionh_path}" ]
655 eerror "These sources have not yet been prepared."
656 eerror "We cannot build against an unprepared tree."
657 eerror "To resolve this, please type the following:"
659 eerror "# cd ${KV_DIR}"
660 eerror "# make oldconfig"
661 eerror "# make modules_prepare"
663 eerror "Then please try merging this module again."
664 die "Kernel sources need compiling first"
668 # @FUNCTION: check_modules_supported
670 # This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
671 check_modules_supported() {
672 # if we haven't determined the version yet, we need too.
673 require_configured_kernel
676 if ! linux_chkconfig_builtin "MODULES"; then
677 eerror "These sources do not support loading external modules."
678 eerror "to be able to use this module please enable \"Loadable modules support\""
679 eerror "in your kernel, recompile and then try merging this module again."
680 die "No support for external modules in ${KV_FULL} config"
684 # @FUNCTION: check_extra_config
686 # It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
687 # the prefix ~ is not used) doesn't satisfy the directive.
688 check_extra_config() {
689 local config negate die error reworkmodulenames
690 local soft_errors_count=0 hard_errors_count=0 config_required=0
691 # store the value of the QA check, because otherwise we won't catch usages
692 # after if check_extra_config is called AND other direct calls are done
694 local old_LINUX_CONFIG_EXISTS_DONE="${_LINUX_CONFIG_EXISTS_DONE}"
696 # if we haven't determined the version yet, we need to
697 linux-info_get_any_version
699 # Determine if we really need a .config. The only time when we don't need
700 # one is when all of the CONFIG_CHECK options are prefixed with "~".
701 for config in ${CONFIG_CHECK}; do
702 if [[ "${config:0:1}" != "~" ]]; then
708 if [[ ${config_required} == 0 ]]; then
709 # In the case where we don't require a .config, we can now bail out
710 # if the user has no .config as there is nothing to do. Otherwise
711 # code later will cause a failure due to missing .config.
712 if ! linux_config_exists; then
713 ewarn "Unable to check for the following kernel config options due"
714 ewarn "to absence of any configured kernel sources or compiled"
716 for config in ${CONFIG_CHECK}; do
719 local_error="ERROR_${config}"
720 msg="${!local_error}"
721 if [[ -z ${msg} ]]; then
722 local_error="WARNING_${config}"
723 msg="${!local_error}"
725 ewarn " - ${config}${msg:+ - }${msg}"
727 ewarn "You're on your own to make sure they are set if needed."
728 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
732 require_configured_kernel
735 einfo "Checking for suitable kernel configuration options..."
737 for config in ${CONFIG_CHECK}
739 # if we specify any fatal, ensure we honor them
745 if [[ ${config:0:1} == "~" ]]; then
748 elif [[ ${config:0:1} == "@" ]]; then
753 if [[ ${config:0:1} == "!" ]]; then
758 if [[ ${negate} == 1 ]]; then
759 linux_chkconfig_present ${config} && error=2
760 elif [[ ${reworkmodulenames} == 1 ]]; then
761 local temp_config="${config//*:}" i n
762 config="${config//:*}"
763 if linux_chkconfig_present ${config}; then
764 for i in ${MODULE_NAMES}; do
765 n="${i//${temp_config}}"
766 [[ -z ${n//\(*} ]] && \
767 MODULE_IGNORE="${MODULE_IGNORE} ${temp_config}"
772 linux_chkconfig_present ${config} || error=1
775 if [[ ${error} > 0 ]]; then
776 local report_func="eerror" local_error
777 local_error="ERROR_${config}"
778 local_error="${!local_error}"
780 if [[ -z "${local_error}" ]]; then
781 # using old, deprecated format.
782 local_error="${config}_ERROR"
783 local_error="${!local_error}"
785 if [[ ${die} == 0 && -z "${local_error}" ]]; then
786 #soft errors can be warnings
787 local_error="WARNING_${config}"
788 local_error="${!local_error}"
789 if [[ -n "${local_error}" ]] ; then
794 if [[ -z "${local_error}" ]]; then
795 [[ ${error} == 1 ]] \
796 && local_error="is not set when it should be." \
797 || local_error="should not be set. But it is."
798 local_error="CONFIG_${config}:\t ${local_error}"
800 if [[ ${die} == 0 ]]; then
801 ${report_func} " ${local_error}"
802 soft_errors_count=$[soft_errors_count + 1]
804 ${report_func} " ${local_error}"
805 hard_errors_count=$[hard_errors_count + 1]
810 if [[ ${hard_errors_count} > 0 ]]; then
811 eerror "Please check to make sure these options are set correctly."
812 eerror "Failure to do so may cause unexpected problems."
813 eerror "Once you have satisfied these options, please try merging"
814 eerror "this package again."
815 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
816 die "Incorrect kernel configuration options"
817 elif [[ ${soft_errors_count} > 0 ]]; then
818 ewarn "Please check to make sure these options are set correctly."
819 ewarn "Failure to do so may cause unexpected problems."
823 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
826 check_zlibinflate() {
827 # if we haven't determined the version yet, we need to
828 require_configured_kernel
831 # although I restructured this code - I really really really dont support it!
833 # bug #27882 - zlib routines are only linked into the kernel
834 # if something compiled into the kernel calls them
836 # plus, for the cloop module, it appears that there's no way
837 # to get cloop.o to include a static zlib if CONFIG_MODVERSIONS
843 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
845 ebegin "checking ZLIB_INFLATE"
846 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
850 ebegin "checking ZLIB_DEFLATE"
851 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
860 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
861 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
862 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
863 (( LINENO_END = $LINENO_END - 1 ))
864 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
866 # okay, now we have a list of symbols
867 # we need to check each one in turn, to see whether it is set or not
868 for x in $SYMBOLS ; do
869 if [ "${!x}" = "y" ]; then
871 einfo "${x} ensures zlib is linked into your kernel - excellent"
877 eerror "This kernel module requires ZLIB library support."
878 eerror "You have enabled zlib support in your kernel, but haven't enabled"
879 eerror "enabled any option that will ensure that zlib is linked into your"
882 eerror "Please ensure that you enable at least one of these options:"
885 for x in $SYMBOLS ; do
890 eerror "Please remember to recompile and install your kernel, and reboot"
891 eerror "into your new kernel before attempting to load this kernel module."
893 die "Kernel doesn't include zlib support"
896 ################################
898 # Also used when inheriting linux-mod to force a get_version call
899 # @FUNCTION: linux-info_pkg_setup
901 # Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
902 # to support the options specified in CONFIG_CHECK (if not null)
903 linux-info_pkg_setup() {
904 linux-info_get_any_version
906 if kernel_is 2 4; then
907 if [ "$( gcc-major-version )" -eq "4" ] ; then
909 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"
910 ewarn "linux-2.4 (or modules building against a linux-2.4 kernel)!"
912 ewarn "Either switch to another gcc-version (via gcc-config) or use a"
913 ewarn "newer kernel that supports gcc-4."
915 ewarn "Also be aware that bugreports about gcc-4 not working"
916 ewarn "with linux-2.4 based ebuilds will be closed as INVALID!"
922 [ -n "${CONFIG_CHECK}" ] && check_extra_config;