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Revision 1.104 - (show annotations) (download)
Sat Jun 28 07:54:27 2014 UTC (2 months, 3 weeks ago) by robbat2
Branch: MAIN
CVS Tags: HEAD
Changes since 1.103: +6 -3 lines
ChangeLog

1 # Copyright 1999-2014 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 1.103 2014/03/21 22:03:00 robbat2 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 ${KERNEL_DIR} points to a complete set of Linux sources."
524 fi
525 return 1
526 fi
527
528 # and in newer versions we can also pull LOCALVERSION if it is set.
529 # but before we do this, we need to find if we use a different object directory.
530 # This *WILL* break if the user is using localversions, but we assume it was
531 # caught before this if they are.
532 OUTPUT_DIR="${OUTPUT_DIR:-/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build}"
533
534 [ -h "${OUTPUT_DIR}" ] && KV_OUT_DIR="$(readlink -f ${OUTPUT_DIR})"
535 [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
536 if [ -n "${KV_OUT_DIR}" ];
537 then
538 qeinfo "Found kernel object directory:"
539 qeinfo " ${KV_OUT_DIR}"
540 fi
541 # and if we STILL have not got it, then we better just set it to KV_DIR
542 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
543
544 # Grab the kernel release from the output directory.
545 # TODO: we MUST detect kernel.release being out of date, and 'return 1' from
546 # this function.
547 if [ -s "${KV_OUT_DIR}"/include/config/kernel.release ]; then
548 KV_LOCAL=$(<"${KV_OUT_DIR}"/include/config/kernel.release)
549 elif [ -s "${KV_OUT_DIR}"/.kernelrelease ]; then
550 KV_LOCAL=$(<"${KV_OUT_DIR}"/.kernelrelease)
551 else
552 KV_LOCAL=
553 fi
554
555 # KV_LOCAL currently contains the full release; discard the first bits.
556 tmplocal=${KV_LOCAL#${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}}
557
558 # If the updated local version was not changed, the tree is not prepared.
559 # Clear out KV_LOCAL in that case.
560 # TODO: this does not detect a change in the localversion part between
561 # kernel.release and the value that would be generated.
562 if [ "$KV_LOCAL" = "$tmplocal" ]; then
563 KV_LOCAL=
564 else
565 KV_LOCAL=$tmplocal
566 fi
567
568 # And we should set KV_FULL to the full expanded version
569 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
570
571 qeinfo "Found sources for kernel version:"
572 qeinfo " ${KV_FULL}"
573
574 return 0
575 }
576
577 # @FUNCTION: get_running_version
578 # @DESCRIPTION:
579 # It gets the version of the current running kernel and the result is the same as get_version() if the
580 # function can find the sources.
581 get_running_version() {
582 KV_FULL=$(uname -r)
583
584 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile && -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
585 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
586 KBUILD_OUTPUT=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
587 unset KV_FULL
588 get_version
589 return $?
590 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
591 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
592 unset KV_FULL
593 get_version
594 return $?
595 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
596 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
597 unset KV_FULL
598 get_version
599 return $?
600 else
601 # This handles a variety of weird kernel versions. Make sure to update
602 # tests/linux-info:get_running_version.sh if you want to change this.
603 local kv_full=${KV_FULL//[-+_]*}
604 KV_MAJOR=$(get_version_component_range 1 ${kv_full})
605 KV_MINOR=$(get_version_component_range 2 ${kv_full})
606 KV_PATCH=$(get_version_component_range 3 ${kv_full})
607 KV_EXTRA="${KV_FULL#${KV_MAJOR}.${KV_MINOR}${KV_PATCH:+.${KV_PATCH}}}"
608 : ${KV_PATCH:=0}
609 fi
610 return 0
611 }
612
613 # This next function is named with the eclass prefix to avoid conflicts with
614 # some old versionator-like eclass functions.
615
616 # @FUNCTION: linux-info_get_any_version
617 # @DESCRIPTION:
618 # This attempts to find the version of the sources, and otherwise falls back to
619 # the version of the running kernel.
620 linux-info_get_any_version() {
621 get_version
622 if [[ $? -ne 0 ]]; then
623 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
624 get_running_version
625 fi
626 }
627
628
629 # ebuild check functions
630 # ---------------------------------------
631
632 # @FUNCTION: check_kernel_built
633 # @DESCRIPTION:
634 # This function verifies that the current kernel sources have been already prepared otherwise it dies.
635 check_kernel_built() {
636 # if we haven't determined the version yet, we need to
637 require_configured_kernel
638 get_version
639
640 local versionh_path
641 if kernel_is -ge 3 7; then
642 versionh_path="include/generated/uapi/linux/version.h"
643 else
644 versionh_path="include/linux/version.h"
645 fi
646
647 if [ ! -f "${KV_OUT_DIR}/${versionh_path}" ]
648 then
649 eerror "These sources have not yet been prepared."
650 eerror "We cannot build against an unprepared tree."
651 eerror "To resolve this, please type the following:"
652 eerror
653 eerror "# cd ${KV_DIR}"
654 eerror "# make oldconfig"
655 eerror "# make modules_prepare"
656 eerror
657 eerror "Then please try merging this module again."
658 die "Kernel sources need compiling first"
659 fi
660 }
661
662 # @FUNCTION: check_modules_supported
663 # @DESCRIPTION:
664 # This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
665 check_modules_supported() {
666 # if we haven't determined the version yet, we need too.
667 require_configured_kernel
668 get_version
669
670 if ! linux_chkconfig_builtin "MODULES"; then
671 eerror "These sources do not support loading external modules."
672 eerror "to be able to use this module please enable \"Loadable modules support\""
673 eerror "in your kernel, recompile and then try merging this module again."
674 die "No support for external modules in ${KV_FULL} config"
675 fi
676 }
677
678 # @FUNCTION: check_extra_config
679 # @DESCRIPTION:
680 # It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
681 # the prefix ~ is not used) doesn't satisfy the directive.
682 check_extra_config() {
683 local config negate die error reworkmodulenames
684 local soft_errors_count=0 hard_errors_count=0 config_required=0
685 # store the value of the QA check, because otherwise we won't catch usages
686 # after if check_extra_config is called AND other direct calls are done
687 # later.
688 local old_LINUX_CONFIG_EXISTS_DONE="${_LINUX_CONFIG_EXISTS_DONE}"
689
690 # if we haven't determined the version yet, we need to
691 linux-info_get_any_version
692
693 # Determine if we really need a .config. The only time when we don't need
694 # one is when all of the CONFIG_CHECK options are prefixed with "~".
695 for config in ${CONFIG_CHECK}; do
696 if [[ "${config:0:1}" != "~" ]]; then
697 config_required=1
698 break
699 fi
700 done
701
702 if [[ ${config_required} == 0 ]]; then
703 # In the case where we don't require a .config, we can now bail out
704 # if the user has no .config as there is nothing to do. Otherwise
705 # code later will cause a failure due to missing .config.
706 if ! linux_config_exists; then
707 ewarn "Unable to check for the following kernel config options due"
708 ewarn "to absence of any configured kernel sources or compiled"
709 ewarn "config:"
710 for config in ${CONFIG_CHECK}; do
711 local_error="ERROR_${config#\~}"
712 msg="${!local_error}"
713 if [[ "x${msg}" == "x" ]]; then
714 local_error="WARNING_${config#\~}"
715 msg="${!local_error}"
716 fi
717 ewarn " - ${config#\~}${msg:+ - }${msg}"
718 done
719 ewarn "You're on your own to make sure they are set if needed."
720 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
721 return 0
722 fi
723 else
724 require_configured_kernel
725 fi
726
727 einfo "Checking for suitable kernel configuration options..."
728
729 for config in ${CONFIG_CHECK}
730 do
731 # if we specify any fatal, ensure we honor them
732 die=1
733 error=0
734 negate=0
735 reworkmodulenames=0
736
737 if [[ ${config:0:1} == "~" ]]; then
738 die=0
739 config=${config:1}
740 elif [[ ${config:0:1} == "@" ]]; then
741 die=0
742 reworkmodulenames=1
743 config=${config:1}
744 fi
745 if [[ ${config:0:1} == "!" ]]; then
746 negate=1
747 config=${config:1}
748 fi
749
750 if [[ ${negate} == 1 ]]; then
751 linux_chkconfig_present ${config} && error=2
752 elif [[ ${reworkmodulenames} == 1 ]]; then
753 local temp_config="${config//*:}" i n
754 config="${config//:*}"
755 if linux_chkconfig_present ${config}; then
756 for i in ${MODULE_NAMES}; do
757 n="${i//${temp_config}}"
758 [[ -z ${n//\(*} ]] && \
759 MODULE_IGNORE="${MODULE_IGNORE} ${temp_config}"
760 done
761 error=2
762 fi
763 else
764 linux_chkconfig_present ${config} || error=1
765 fi
766
767 if [[ ${error} > 0 ]]; then
768 local report_func="eerror" local_error
769 local_error="ERROR_${config}"
770 local_error="${!local_error}"
771
772 if [[ -z "${local_error}" ]]; then
773 # using old, deprecated format.
774 local_error="${config}_ERROR"
775 local_error="${!local_error}"
776 fi
777 if [[ ${die} == 0 && -z "${local_error}" ]]; then
778 #soft errors can be warnings
779 local_error="WARNING_${config}"
780 local_error="${!local_error}"
781 if [[ -n "${local_error}" ]] ; then
782 report_func="ewarn"
783 fi
784 fi
785
786 if [[ -z "${local_error}" ]]; then
787 [[ ${error} == 1 ]] \
788 && local_error="is not set when it should be." \
789 || local_error="should not be set. But it is."
790 local_error="CONFIG_${config}:\t ${local_error}"
791 fi
792 if [[ ${die} == 0 ]]; then
793 ${report_func} " ${local_error}"
794 soft_errors_count=$[soft_errors_count + 1]
795 else
796 ${report_func} " ${local_error}"
797 hard_errors_count=$[hard_errors_count + 1]
798 fi
799 fi
800 done
801
802 if [[ ${hard_errors_count} > 0 ]]; then
803 eerror "Please check to make sure these options are set correctly."
804 eerror "Failure to do so may cause unexpected problems."
805 eerror "Once you have satisfied these options, please try merging"
806 eerror "this package again."
807 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
808 die "Incorrect kernel configuration options"
809 elif [[ ${soft_errors_count} > 0 ]]; then
810 ewarn "Please check to make sure these options are set correctly."
811 ewarn "Failure to do so may cause unexpected problems."
812 else
813 eend 0
814 fi
815 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
816 }
817
818 check_zlibinflate() {
819 # if we haven't determined the version yet, we need to
820 require_configured_kernel
821 get_version
822
823 # although I restructured this code - I really really really dont support it!
824
825 # bug #27882 - zlib routines are only linked into the kernel
826 # if something compiled into the kernel calls them
827 #
828 # plus, for the cloop module, it appears that there's no way
829 # to get cloop.o to include a static zlib if CONFIG_MODVERSIONS
830 # is on
831
832 local INFLATE
833 local DEFLATE
834
835 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
836
837 ebegin "checking ZLIB_INFLATE"
838 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
839 eend $?
840 [ "$?" != 0 ] && die
841
842 ebegin "checking ZLIB_DEFLATE"
843 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
844 eend $?
845 [ "$?" != 0 ] && die
846
847 local LINENO_START
848 local LINENO_END
849 local SYMBOLS
850 local x
851
852 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
853 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
854 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
855 (( LINENO_END = $LINENO_END - 1 ))
856 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
857
858 # okay, now we have a list of symbols
859 # we need to check each one in turn, to see whether it is set or not
860 for x in $SYMBOLS ; do
861 if [ "${!x}" = "y" ]; then
862 # we have a winner!
863 einfo "${x} ensures zlib is linked into your kernel - excellent"
864 return 0
865 fi
866 done
867
868 eerror
869 eerror "This kernel module requires ZLIB library support."
870 eerror "You have enabled zlib support in your kernel, but haven't enabled"
871 eerror "enabled any option that will ensure that zlib is linked into your"
872 eerror "kernel."
873 eerror
874 eerror "Please ensure that you enable at least one of these options:"
875 eerror
876
877 for x in $SYMBOLS ; do
878 eerror " * $x"
879 done
880
881 eerror
882 eerror "Please remember to recompile and install your kernel, and reboot"
883 eerror "into your new kernel before attempting to load this kernel module."
884
885 die "Kernel doesn't include zlib support"
886 }
887
888 ################################
889 # Default pkg_setup
890 # Also used when inheriting linux-mod to force a get_version call
891 # @FUNCTION: linux-info_pkg_setup
892 # @DESCRIPTION:
893 # Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
894 # to support the options specified in CONFIG_CHECK (if not null)
895 linux-info_pkg_setup() {
896 linux-info_get_any_version
897
898 if kernel_is 2 4; then
899 if [ "$( gcc-major-version )" -eq "4" ] ; then
900 echo
901 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"
902 ewarn "linux-2.4 (or modules building against a linux-2.4 kernel)!"
903 echo
904 ewarn "Either switch to another gcc-version (via gcc-config) or use a"
905 ewarn "newer kernel that supports gcc-4."
906 echo
907 ewarn "Also be aware that bugreports about gcc-4 not working"
908 ewarn "with linux-2.4 based ebuilds will be closed as INVALID!"
909 echo
910 epause 10
911 fi
912 fi
913
914 [ -n "${CONFIG_CHECK}" ] && check_extra_config;
915 }

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