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Revision 1.107 - (show annotations) (download)
Tue Jun 2 07:39:52 2015 UTC (2 years, 5 months ago) by vapier
Branch: MAIN
CVS Tags: HEAD
Changes since 1.106: +2 -2 lines
fix typo in SYSROOT var pointed out by Michał Górny

1 # Copyright 1999-2015 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /var/cvsroot/gentoo-x86/eclass/linux-info.eclass,v 1.106 2015/06/02 04:27:35 vapier Exp $
4
5 # @ECLASS: linux-info.eclass
6 # @MAINTAINER:
7 # kernel-misc@gentoo.org
8 # @AUTHOR:
9 # Original author: John Mylchreest <johnm@gentoo.org>
10 # @BLURB: eclass used for accessing kernel related information
11 # @DESCRIPTION:
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.
17 #
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.
21 #
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
27 # get_version
28 # get_running_version
29
30 # A Couple of env vars are available to effect usage of this eclass
31 # These are as follows:
32
33 # @ECLASS-VARIABLE: KERNEL_DIR
34 # @DESCRIPTION:
35 # A string containing the directory of the target kernel sources. The default value is
36 # "/usr/src/linux"
37
38 # @ECLASS-VARIABLE: CONFIG_CHECK
39 # @DESCRIPTION:
40 # A string containing a list of .config options to check for before
41 # proceeding with the install.
42 #
43 # e.g.: CONFIG_CHECK="MTRR"
44 #
45 # You can also check that an option doesn't exist by
46 # prepending it with an exclamation mark (!).
47 #
48 # e.g.: CONFIG_CHECK="!MTRR"
49 #
50 # To simply warn about a missing option, prepend a '~'.
51 # It may be combined with '!'.
52 #
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
55 # without the option.
56 #
57 # This is to allow usage of binary kernels, and minimal systems without kernel
58 # sources.
59
60 # @ECLASS-VARIABLE: ERROR_<CFG>
61 # @DESCRIPTION:
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.
64 #
65 # e.g.: ERROR_MTRR="MTRR exists in the .config but shouldn't!!"
66
67 # @ECLASS-VARIABLE: KBUILD_OUTPUT
68 # @DESCRIPTION:
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.
71
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:
74
75 # @ECLASS-VARIABLE: KV_FULL
76 # @DESCRIPTION:
77 # A read-only variable. It's a string containing the full kernel version. ie: 2.6.9-gentoo-johnm-r1
78
79 # @ECLASS-VARIABLE: KV_MAJOR
80 # @DESCRIPTION:
81 # A read-only variable. It's an integer containing the kernel major version. ie: 2
82
83 # @ECLASS-VARIABLE: KV_MINOR
84 # @DESCRIPTION:
85 # A read-only variable. It's an integer containing the kernel minor version. ie: 6
86
87 # @ECLASS-VARIABLE: KV_PATCH
88 # @DESCRIPTION:
89 # A read-only variable. It's an integer containing the kernel patch version. ie: 9
90
91 # @ECLASS-VARIABLE: KV_EXTRA
92 # @DESCRIPTION:
93 # A read-only variable. It's a string containing the kernel EXTRAVERSION. ie: -gentoo
94
95 # @ECLASS-VARIABLE: KV_LOCAL
96 # @DESCRIPTION:
97 # A read-only variable. It's a string containing the kernel LOCALVERSION concatenation. ie: -johnm
98
99 # @ECLASS-VARIABLE: KV_DIR
100 # @DESCRIPTION:
101 # A read-only variable. It's a string containing the kernel source directory, will be null if
102 # KERNEL_DIR is invalid.
103
104 # @ECLASS-VARIABLE: KV_OUT_DIR
105 # @DESCRIPTION:
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.
108
109 # And to ensure all the weirdness with crosscompile
110 inherit toolchain-funcs versionator
111
112 EXPORT_FUNCTIONS pkg_setup
113
114 # Overwritable environment Var's
115 # ---------------------------------------
116 KERNEL_DIR="${KERNEL_DIR:-${ROOT}usr/src/linux}"
117
118
119 # Bug fixes
120 # fix to bug #75034
121 case ${ARCH} in
122 ppc) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
123 ppc64) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
124 esac
125
126 # @FUNCTION: set_arch_to_kernel
127 # @DESCRIPTION:
128 # Set the env ARCH to match what the kernel expects.
129 set_arch_to_kernel() { export ARCH=$(tc-arch-kernel); }
130 # @FUNCTION: set_arch_to_portage
131 # @DESCRIPTION:
132 # Set the env ARCH to match what portage expects.
133 set_arch_to_portage() { export ARCH=$(tc-arch); }
134
135 # qeinfo "Message"
136 # -------------------
137 # qeinfo is a quiet einfo call when EBUILD_PHASE
138 # should not have visible output.
139 qout() {
140 local outputmsg type
141 type=${1}
142 shift
143 outputmsg="${@}"
144 case "${EBUILD_PHASE}" in
145 depend) unset outputmsg;;
146 clean) unset outputmsg;;
147 preinst) unset outputmsg;;
148 esac
149 [ -n "${outputmsg}" ] && ${type} "${outputmsg}"
150 }
151
152 qeinfo() { qout einfo "${@}" ; }
153 qewarn() { qout ewarn "${@}" ; }
154 qeerror() { qout eerror "${@}" ; }
155
156 # File Functions
157 # ---------------------------------------
158
159 # @FUNCTION: getfilevar
160 # @USAGE: variable configfile
161 # @RETURN: the value of the variable
162 # @DESCRIPTION:
163 # It detects the value of the variable defined in the file configfile. This is
164 # done by including the configfile, and printing the variable with Make.
165 # It WILL break if your makefile has missing dependencies!
166 getfilevar() {
167 local ERROR basefname basedname myARCH="${ARCH}" M="${S}"
168 ERROR=0
169
170 [ -z "${1}" ] && ERROR=1
171 [ ! -f "${2}" ] && ERROR=1
172
173 if [ "${ERROR}" = 1 ]
174 then
175 echo -e "\n"
176 eerror "getfilevar requires 2 variables, with the second a valid file."
177 eerror " getfilevar <VARIABLE> <CONFIGFILE>"
178 else
179 basefname="$(basename ${2})"
180 basedname="$(dirname ${2})"
181 unset ARCH
182
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}" ;;
187 esac
188 echo -e "e:\\n\\t@echo \$(${1})\\ninclude ${basefname}" | \
189 nonfatal emake -C "${basedname}" M="${M}" ${BUILD_FIXES} -s -f - 2>/dev/null
190
191 ARCH=${myARCH}
192 fi
193 }
194
195 # @FUNCTION: getfilevar_noexec
196 # @USAGE: variable configfile
197 # @RETURN: the value of the variable
198 # @DESCRIPTION:
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="${ARCH}"
204 ERROR=0
205 mycat='cat'
206
207 [ -z "${1}" ] && ERROR=1
208 [ ! -f "${2}" ] && ERROR=1
209 [ "${2%.gz}" != "${2}" ] && mycat='zcat'
210
211 if [ "${ERROR}" = 1 ]
212 then
213 echo -e "\n"
214 eerror "getfilevar_noexec requires 2 variables, with the second a valid file."
215 eerror " getfilevar_noexec <VARIABLE> <CONFIGFILE>"
216 else
217 ${mycat} "${2}" | \
218 sed -n \
219 -e "/^[[:space:]]*${1}[[:space:]]*:\\?=[[:space:]]*\(.*\)\$/{
220 s,^[^=]*[[:space:]]*=[[:space:]]*,,g ;
221 s,[[:space:]]*\$,,g ;
222 p
223 }"
224 fi
225 }
226
227 # @ECLASS-VARIABLE: _LINUX_CONFIG_EXISTS_DONE
228 # @INTERNAL
229 # @DESCRIPTION:
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=
235
236 linux_config_qa_check() {
237 local f="$1"
238 if [ -z "${_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!"
241 fi
242 }
243
244 # @FUNCTION: linux_config_src_exists
245 # @RETURN: true or false
246 # @DESCRIPTION:
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 ${KV_OUT_DIR}/.config ]]
251 }
252
253 # @FUNCTION: linux_config_bin_exists
254 # @RETURN: true or false
255 # @DESCRIPTION:
256 # It returns true if .config exists in /proc, otherwise false
257 linux_config_bin_exists() {
258 export _LINUX_CONFIG_EXISTS_DONE=1
259 [[ -s /proc/config.gz ]]
260 }
261
262 # @FUNCTION: linux_config_exists
263 # @RETURN: true or false
264 # @DESCRIPTION:
265 # It returns true if .config exists otherwise false
266 #
267 # This function MUST be checked before using any of the linux_chkconfig_*
268 # functions.
269 linux_config_exists() {
270 linux_config_src_exists || linux_config_bin_exists
271 }
272
273 # @FUNCTION: linux_config_path
274 # @DESCRIPTION:
275 # Echo the name of the config file to use. If none are found,
276 # then return false.
277 linux_config_path() {
278 if linux_config_src_exists; then
279 echo "${KV_OUT_DIR}/.config"
280 elif linux_config_bin_exists; then
281 echo "/proc/config.gz"
282 else
283 return 1
284 fi
285 }
286
287 # @FUNCTION: require_configured_kernel
288 # @DESCRIPTION:
289 # This function verifies that the current kernel is configured (it checks against the existence of .config)
290 # otherwise it dies.
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}"
298 fi
299 }
300
301 # @FUNCTION: linux_chkconfig_present
302 # @USAGE: option
303 # @RETURN: true or false
304 # @DESCRIPTION:
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] ]]
311 }
312
313 # @FUNCTION: linux_chkconfig_module
314 # @USAGE: option
315 # @RETURN: true or false
316 # @DESCRIPTION:
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 ]]
323 }
324
325 # @FUNCTION: linux_chkconfig_builtin
326 # @USAGE: option
327 # @RETURN: true or false
328 # @DESCRIPTION:
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 ]]
335 }
336
337 # @FUNCTION: linux_chkconfig_string
338 # @USAGE: option
339 # @RETURN: CONFIG_<option>
340 # @DESCRIPTION:
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)"
347 }
348
349 # Versioning Functions
350 # ---------------------------------------
351
352 # @FUNCTION: kernel_is
353 # @USAGE: [-lt -gt -le -ge -eq] major_number [minor_number patch_number]
354 # @RETURN: true or false
355 # @DESCRIPTION:
356 # It returns true when the current kernel version satisfies the comparison against the passed version.
357 # -eq is the default comparison.
358 #
359 # @CODE
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
366 # @CODE
367
368 # Note: duplicated in kernel-2.eclass
369 kernel_is() {
370 # if we haven't determined the version yet, we need to.
371 linux-info_get_any_version
372
373 # Now we can continue
374 local operator test value
375
376 case ${1#-} in
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;;
382 *) operator="-eq";;
383 esac
384 [[ $# -gt 3 ]] && die "Error in kernel-2_kernel_is(): too many parameters"
385
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} ]
389 }
390
391 get_localversion() {
392 local lv_list i x
393
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}"
397 done
398
399 for i in ${lv_list}; do
400 x="${x}$(<${i})"
401 done
402 x=${x/ /}
403 echo ${x}
404 }
405
406 # Check if the Makefile is valid for direct parsing.
407 # Check status results:
408 # - PASS, use 'getfilevar' to extract values
409 # - FAIL, use 'getfilevar_noexec' to extract values
410 # The check may fail if:
411 # - make is not present
412 # - corruption exists in the kernel makefile
413 get_makefile_extract_function() {
414 local a='' b='' mkfunc='getfilevar'
415 a="$(getfilevar VERSION ${KERNEL_MAKEFILE})"
416 b="$(getfilevar_noexec VERSION ${KERNEL_MAKEFILE})"
417 [[ "${a}" != "${b}" ]] && mkfunc='getfilevar_noexec'
418 echo "${mkfunc}"
419 }
420
421 # internal variable, so we know to only print the warning once
422 get_version_warning_done=
423
424 # @FUNCTION: get_version
425 # @DESCRIPTION:
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).
428 #
429 # The kernel version variables (KV_MAJOR, KV_MINOR, KV_PATCH, KV_EXTRA and KV_LOCAL) are also set.
430 #
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).
434 get_version() {
435 local tmplocal
436
437 # no need to execute this twice assuming KV_FULL is populated.
438 # we can force by unsetting KV_FULL
439 [ -n "${KV_FULL}" ] && return 0
440
441 # if we dont know KV_FULL, then we need too.
442 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
443 unset KV_DIR
444
445 # KV_DIR will contain the full path to the sources directory we should use
446 [ -z "${get_version_warning_done}" ] && \
447 qeinfo "Determining the location of the kernel source code"
448 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
449 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
450
451 if [ -z "${KV_DIR}" ]
452 then
453 if [ -z "${get_version_warning_done}" ]; then
454 get_version_warning_done=1
455 qewarn "Unable to find kernel sources at ${KERNEL_DIR}"
456 #qeinfo "This package requires Linux sources."
457 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
458 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
459 qeinfo "(or the kernel you wish to build against)."
460 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
461 else
462 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
463 fi
464 fi
465 return 1
466 fi
467
468 # See if the kernel dir is actually an output dir. #454294
469 if [ -z "${KBUILD_OUTPUT}" -a -L "${KERNEL_DIR}/source" ]; then
470 KBUILD_OUTPUT=${KERNEL_DIR}
471 KERNEL_DIR=$(readlink -f "${KERNEL_DIR}/source")
472 KV_DIR=${KERNEL_DIR}
473 fi
474
475 if [ -z "${get_version_warning_done}" ]; then
476 qeinfo "Found kernel source directory:"
477 qeinfo " ${KV_DIR}"
478 fi
479
480 if [ ! -s "${KV_DIR}/Makefile" ]
481 then
482 if [ -z "${get_version_warning_done}" ]; then
483 get_version_warning_done=1
484 qeerror "Could not find a Makefile in the kernel source directory."
485 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
486 fi
487 return 1
488 fi
489
490 # OK so now we know our sources directory, but they might be using
491 # KBUILD_OUTPUT, and we need this for .config and localversions-*
492 # so we better find it eh?
493 # do we pass KBUILD_OUTPUT on the CLI?
494 local OUTPUT_DIR=${KBUILD_OUTPUT}
495
496 # keep track of it
497 KERNEL_MAKEFILE="${KV_DIR}/Makefile"
498
499 if [[ -z ${OUTPUT_DIR} ]]; then
500 # Decide the function used to extract makefile variables.
501 local mkfunc=$(get_makefile_extract_function "${KERNEL_MAKEFILE}")
502
503 # And if we didn't pass it, we can take a nosey in the Makefile.
504 OUTPUT_DIR=$(${mkfunc} KBUILD_OUTPUT "${KERNEL_MAKEFILE}")
505 fi
506
507 # And contrary to existing functions I feel we shouldn't trust the
508 # directory name to find version information as this seems insane.
509 # So we parse ${KERNEL_MAKEFILE}. We should be able to trust that
510 # the Makefile is simple enough to use the noexec extract function.
511 # This has been true for every release thus far, and it's faster
512 # than using make to evaluate the Makefile every time.
513 KV_MAJOR=$(getfilevar_noexec VERSION "${KERNEL_MAKEFILE}")
514 KV_MINOR=$(getfilevar_noexec PATCHLEVEL "${KERNEL_MAKEFILE}")
515 KV_PATCH=$(getfilevar_noexec SUBLEVEL "${KERNEL_MAKEFILE}")
516 KV_EXTRA=$(getfilevar_noexec EXTRAVERSION "${KERNEL_MAKEFILE}")
517
518 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
519 then
520 if [ -z "${get_version_warning_done}" ]; then
521 get_version_warning_done=1
522 qeerror "Could not detect kernel version."
523 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
524 fi
525 return 1
526 fi
527
528 # and in newer versions we can also pull LOCALVERSION if it is set.
529 # but before we do this, we need to find if we use a different object directory.
530 # This *WILL* break if the user is using localversions, but we assume it was
531 # caught before this if they are.
532 if [[ -z ${OUTPUT_DIR} ]] ; then
533 # Try to locate a kernel that is most relevant for us.
534 for OUTPUT_DIR in "${SYSROOT}" "${ROOT}" "" ; do
535 OUTPUT_DIR+="/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build"
536 if [[ -e ${OUTPUT_DIR} ]] ; then
537 break
538 fi
539 done
540 fi
541
542 [ -h "${OUTPUT_DIR}" ] && KV_OUT_DIR="$(readlink -f ${OUTPUT_DIR})"
543 [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
544 if [ -n "${KV_OUT_DIR}" ];
545 then
546 qeinfo "Found kernel object directory:"
547 qeinfo " ${KV_OUT_DIR}"
548 fi
549 # and if we STILL have not got it, then we better just set it to KV_DIR
550 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
551
552 # Grab the kernel release from the output directory.
553 # TODO: we MUST detect kernel.release being out of date, and 'return 1' from
554 # this function.
555 if [ -s "${KV_OUT_DIR}"/include/config/kernel.release ]; then
556 KV_LOCAL=$(<"${KV_OUT_DIR}"/include/config/kernel.release)
557 elif [ -s "${KV_OUT_DIR}"/.kernelrelease ]; then
558 KV_LOCAL=$(<"${KV_OUT_DIR}"/.kernelrelease)
559 else
560 KV_LOCAL=
561 fi
562
563 # KV_LOCAL currently contains the full release; discard the first bits.
564 tmplocal=${KV_LOCAL#${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}}
565
566 # If the updated local version was not changed, the tree is not prepared.
567 # Clear out KV_LOCAL in that case.
568 # TODO: this does not detect a change in the localversion part between
569 # kernel.release and the value that would be generated.
570 if [ "$KV_LOCAL" = "$tmplocal" ]; then
571 KV_LOCAL=
572 else
573 KV_LOCAL=$tmplocal
574 fi
575
576 # And we should set KV_FULL to the full expanded version
577 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
578
579 qeinfo "Found sources for kernel version:"
580 qeinfo " ${KV_FULL}"
581
582 return 0
583 }
584
585 # @FUNCTION: get_running_version
586 # @DESCRIPTION:
587 # It gets the version of the current running kernel and the result is the same as get_version() if the
588 # function can find the sources.
589 get_running_version() {
590 KV_FULL=$(uname -r)
591
592 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile && -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
593 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
594 KBUILD_OUTPUT=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
595 unset KV_FULL
596 get_version
597 return $?
598 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
599 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
600 unset KV_FULL
601 get_version
602 return $?
603 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
604 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
605 unset KV_FULL
606 get_version
607 return $?
608 else
609 # This handles a variety of weird kernel versions. Make sure to update
610 # tests/linux-info_get_running_version.sh if you want to change this.
611 local kv_full=${KV_FULL//[-+_]*}
612 KV_MAJOR=$(get_version_component_range 1 ${kv_full})
613 KV_MINOR=$(get_version_component_range 2 ${kv_full})
614 KV_PATCH=$(get_version_component_range 3 ${kv_full})
615 KV_EXTRA="${KV_FULL#${KV_MAJOR}.${KV_MINOR}${KV_PATCH:+.${KV_PATCH}}}"
616 : ${KV_PATCH:=0}
617 fi
618 return 0
619 }
620
621 # This next function is named with the eclass prefix to avoid conflicts with
622 # some old versionator-like eclass functions.
623
624 # @FUNCTION: linux-info_get_any_version
625 # @DESCRIPTION:
626 # This attempts to find the version of the sources, and otherwise falls back to
627 # the version of the running kernel.
628 linux-info_get_any_version() {
629 get_version
630 if [[ $? -ne 0 ]]; then
631 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
632 get_running_version
633 fi
634 }
635
636
637 # ebuild check functions
638 # ---------------------------------------
639
640 # @FUNCTION: check_kernel_built
641 # @DESCRIPTION:
642 # This function verifies that the current kernel sources have been already prepared otherwise it dies.
643 check_kernel_built() {
644 # if we haven't determined the version yet, we need to
645 require_configured_kernel
646 get_version
647
648 local versionh_path
649 if kernel_is -ge 3 7; then
650 versionh_path="include/generated/uapi/linux/version.h"
651 else
652 versionh_path="include/linux/version.h"
653 fi
654
655 if [ ! -f "${KV_OUT_DIR}/${versionh_path}" ]
656 then
657 eerror "These sources have not yet been prepared."
658 eerror "We cannot build against an unprepared tree."
659 eerror "To resolve this, please type the following:"
660 eerror
661 eerror "# cd ${KV_DIR}"
662 eerror "# make oldconfig"
663 eerror "# make modules_prepare"
664 eerror
665 eerror "Then please try merging this module again."
666 die "Kernel sources need compiling first"
667 fi
668 }
669
670 # @FUNCTION: check_modules_supported
671 # @DESCRIPTION:
672 # This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
673 check_modules_supported() {
674 # if we haven't determined the version yet, we need too.
675 require_configured_kernel
676 get_version
677
678 if ! linux_chkconfig_builtin "MODULES"; then
679 eerror "These sources do not support loading external modules."
680 eerror "to be able to use this module please enable \"Loadable modules support\""
681 eerror "in your kernel, recompile and then try merging this module again."
682 die "No support for external modules in ${KV_FULL} config"
683 fi
684 }
685
686 # @FUNCTION: check_extra_config
687 # @DESCRIPTION:
688 # It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
689 # the prefix ~ is not used) doesn't satisfy the directive.
690 check_extra_config() {
691 local config negate die error reworkmodulenames
692 local soft_errors_count=0 hard_errors_count=0 config_required=0
693 # store the value of the QA check, because otherwise we won't catch usages
694 # after if check_extra_config is called AND other direct calls are done
695 # later.
696 local old_LINUX_CONFIG_EXISTS_DONE="${_LINUX_CONFIG_EXISTS_DONE}"
697
698 # if we haven't determined the version yet, we need to
699 linux-info_get_any_version
700
701 # Determine if we really need a .config. The only time when we don't need
702 # one is when all of the CONFIG_CHECK options are prefixed with "~".
703 for config in ${CONFIG_CHECK}; do
704 if [[ "${config:0:1}" != "~" ]]; then
705 config_required=1
706 break
707 fi
708 done
709
710 if [[ ${config_required} == 0 ]]; then
711 # In the case where we don't require a .config, we can now bail out
712 # if the user has no .config as there is nothing to do. Otherwise
713 # code later will cause a failure due to missing .config.
714 if ! linux_config_exists; then
715 ewarn "Unable to check for the following kernel config options due"
716 ewarn "to absence of any configured kernel sources or compiled"
717 ewarn "config:"
718 for config in ${CONFIG_CHECK}; do
719 local_error="ERROR_${config#\~}"
720 msg="${!local_error}"
721 if [[ "x${msg}" == "x" ]]; then
722 local_error="WARNING_${config#\~}"
723 msg="${!local_error}"
724 fi
725 ewarn " - ${config#\~}${msg:+ - }${msg}"
726 done
727 ewarn "You're on your own to make sure they are set if needed."
728 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
729 return 0
730 fi
731 else
732 require_configured_kernel
733 fi
734
735 einfo "Checking for suitable kernel configuration options..."
736
737 for config in ${CONFIG_CHECK}
738 do
739 # if we specify any fatal, ensure we honor them
740 die=1
741 error=0
742 negate=0
743 reworkmodulenames=0
744
745 if [[ ${config:0:1} == "~" ]]; then
746 die=0
747 config=${config:1}
748 elif [[ ${config:0:1} == "@" ]]; then
749 die=0
750 reworkmodulenames=1
751 config=${config:1}
752 fi
753 if [[ ${config:0:1} == "!" ]]; then
754 negate=1
755 config=${config:1}
756 fi
757
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}"
768 done
769 error=2
770 fi
771 else
772 linux_chkconfig_present ${config} || error=1
773 fi
774
775 if [[ ${error} > 0 ]]; then
776 local report_func="eerror" local_error
777 local_error="ERROR_${config}"
778 local_error="${!local_error}"
779
780 if [[ -z "${local_error}" ]]; then
781 # using old, deprecated format.
782 local_error="${config}_ERROR"
783 local_error="${!local_error}"
784 fi
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 "${local_error}" ]] ; then
790 report_func="ewarn"
791 fi
792 fi
793
794 if [[ -z "${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}"
799 fi
800 if [[ ${die} == 0 ]]; then
801 ${report_func} " ${local_error}"
802 soft_errors_count=$[soft_errors_count + 1]
803 else
804 ${report_func} " ${local_error}"
805 hard_errors_count=$[hard_errors_count + 1]
806 fi
807 fi
808 done
809
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 [[ ${soft_errors_count} > 0 ]]; then
818 ewarn "Please check to make sure these options are set correctly."
819 ewarn "Failure to do so may cause unexpected problems."
820 else
821 eend 0
822 fi
823 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
824 }
825
826 check_zlibinflate() {
827 # if we haven't determined the version yet, we need to
828 require_configured_kernel
829 get_version
830
831 # although I restructured this code - I really really really dont support it!
832
833 # bug #27882 - zlib routines are only linked into the kernel
834 # if something compiled into the kernel calls them
835 #
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
838 # is on
839
840 local INFLATE
841 local DEFLATE
842
843 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
844
845 ebegin "checking ZLIB_INFLATE"
846 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
847 eend $?
848 [ "$?" != 0 ] && die
849
850 ebegin "checking ZLIB_DEFLATE"
851 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
852 eend $?
853 [ "$?" != 0 ] && die
854
855 local LINENO_START
856 local LINENO_END
857 local SYMBOLS
858 local x
859
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;')"
865
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
870 # we have a winner!
871 einfo "${x} ensures zlib is linked into your kernel - excellent"
872 return 0
873 fi
874 done
875
876 eerror
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"
880 eerror "kernel."
881 eerror
882 eerror "Please ensure that you enable at least one of these options:"
883 eerror
884
885 for x in $SYMBOLS ; do
886 eerror " * $x"
887 done
888
889 eerror
890 eerror "Please remember to recompile and install your kernel, and reboot"
891 eerror "into your new kernel before attempting to load this kernel module."
892
893 die "Kernel doesn't include zlib support"
894 }
895
896 ################################
897 # Default pkg_setup
898 # Also used when inheriting linux-mod to force a get_version call
899 # @FUNCTION: linux-info_pkg_setup
900 # @DESCRIPTION:
901 # Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
902 # to support the options specified in CONFIG_CHECK (if not null)
903 linux-info_pkg_setup() {
904 linux-info_get_any_version
905
906 if kernel_is 2 4; then
907 if [ "$( gcc-major-version )" -eq "4" ] ; then
908 echo
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)!"
911 echo
912 ewarn "Either switch to another gcc-version (via gcc-config) or use a"
913 ewarn "newer kernel that supports gcc-4."
914 echo
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!"
917 echo
918 epause 10
919 fi
920 fi
921
922 [ -n "${CONFIG_CHECK}" ] && check_extra_config;
923 }

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