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Revision 1.99 - (show annotations) (download)
Sun Feb 10 06:20:10 2013 UTC (18 months, 2 weeks ago) by vapier
Branch: MAIN
Changes since 1.98: +1 -4 lines
delete empty depend vars

1 # Copyright 1999-2013 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 1.98 2013/02/10 06:18:19 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}"
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 echo -e "e:\\n\\t@echo \$(${1})\\ninclude ${basefname}" | \
186 nonfatal emake -C "${basedname}" M="${S}" ${BUILD_FIXES} -s -f - 2>/dev/null
187
188 ARCH=${myARCH}
189 fi
190 }
191
192 # @FUNCTION: getfilevar_noexec
193 # @USAGE: variable configfile
194 # @RETURN: the value of the variable
195 # @DESCRIPTION:
196 # It detects the value of the variable defined in the file configfile.
197 # This is done with sed matching an expression only. If the variable is defined,
198 # you will run into problems. See getfilevar for those cases.
199 getfilevar_noexec() {
200 local ERROR basefname basedname mycat myARCH="${ARCH}"
201 ERROR=0
202 mycat='cat'
203
204 [ -z "${1}" ] && ERROR=1
205 [ ! -f "${2}" ] && ERROR=1
206 [ "${2%.gz}" != "${2}" ] && mycat='zcat'
207
208 if [ "${ERROR}" = 1 ]
209 then
210 echo -e "\n"
211 eerror "getfilevar_noexec requires 2 variables, with the second a valid file."
212 eerror " getfilevar_noexec <VARIABLE> <CONFIGFILE>"
213 else
214 ${mycat} "${2}" | \
215 sed -n \
216 -e "/^[[:space:]]*${1}[[:space:]]*:\\?=[[:space:]]*\(.*\)\$/{
217 s,^[^=]*[[:space:]]*=[[:space:]]*,,g ;
218 s,[[:space:]]*\$,,g ;
219 p
220 }"
221 fi
222 }
223
224 # @ECLASS-VARIABLE: _LINUX_CONFIG_EXISTS_DONE
225 # @INTERNAL
226 # @DESCRIPTION:
227 # This is only set if one of the linux_config_*exists functions has been called.
228 # We use it for a QA warning that the check for a config has not been performed,
229 # as linux_chkconfig* in non-legacy mode WILL return an undefined value if no
230 # config is available at all.
231 _LINUX_CONFIG_EXISTS_DONE=
232
233 linux_config_qa_check() {
234 local f="$1"
235 if [ -z "${_LINUX_CONFIG_EXISTS_DONE}" ]; then
236 ewarn "QA: You called $f before any linux_config_exists!"
237 ewarn "QA: The return value of $f will NOT guaranteed later!"
238 fi
239 }
240
241 # @FUNCTION: linux_config_src_exists
242 # @RETURN: true or false
243 # @DESCRIPTION:
244 # It returns true if .config exists in a build directory otherwise false
245 linux_config_src_exists() {
246 export _LINUX_CONFIG_EXISTS_DONE=1
247 [[ -n ${KV_OUT_DIR} && -s ${KV_OUT_DIR}/.config ]]
248 }
249
250 # @FUNCTION: linux_config_bin_exists
251 # @RETURN: true or false
252 # @DESCRIPTION:
253 # It returns true if .config exists in /proc, otherwise false
254 linux_config_bin_exists() {
255 export _LINUX_CONFIG_EXISTS_DONE=1
256 [[ -s /proc/config.gz ]]
257 }
258
259 # @FUNCTION: linux_config_exists
260 # @RETURN: true or false
261 # @DESCRIPTION:
262 # It returns true if .config exists otherwise false
263 #
264 # This function MUST be checked before using any of the linux_chkconfig_*
265 # functions.
266 linux_config_exists() {
267 linux_config_src_exists || linux_config_bin_exists
268 }
269
270 # @FUNCTION: linux_config_path
271 # @DESCRIPTION:
272 # Echo the name of the config file to use. If none are found,
273 # then return false.
274 linux_config_path() {
275 if linux_config_src_exists; then
276 echo "${KV_OUT_DIR}/.config"
277 elif linux_config_bin_exists; then
278 echo "/proc/config.gz"
279 else
280 return 1
281 fi
282 }
283
284 # @FUNCTION: require_configured_kernel
285 # @DESCRIPTION:
286 # This function verifies that the current kernel is configured (it checks against the existence of .config)
287 # otherwise it dies.
288 require_configured_kernel() {
289 if ! linux_config_src_exists; then
290 qeerror "Could not find a usable .config in the kernel source directory."
291 qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources."
292 qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that"
293 qeerror "it points to the necessary object directory so that it might find .config."
294 die "Kernel not configured; no .config found in ${KV_OUT_DIR}"
295 fi
296 }
297
298 # @FUNCTION: linux_chkconfig_present
299 # @USAGE: option
300 # @RETURN: true or false
301 # @DESCRIPTION:
302 # It checks that CONFIG_<option>=y or CONFIG_<option>=m is present in the current kernel .config
303 # If linux_config_exists returns false, the results of this are UNDEFINED. You
304 # MUST call linux_config_exists first.
305 linux_chkconfig_present() {
306 linux_config_qa_check linux_chkconfig_present
307 [[ $(getfilevar_noexec "CONFIG_$1" "$(linux_config_path)") == [my] ]]
308 }
309
310 # @FUNCTION: linux_chkconfig_module
311 # @USAGE: option
312 # @RETURN: true or false
313 # @DESCRIPTION:
314 # It checks that CONFIG_<option>=m is present in the current kernel .config
315 # If linux_config_exists returns false, the results of this are UNDEFINED. You
316 # MUST call linux_config_exists first.
317 linux_chkconfig_module() {
318 linux_config_qa_check linux_chkconfig_module
319 [[ $(getfilevar_noexec "CONFIG_$1" "$(linux_config_path)") == m ]]
320 }
321
322 # @FUNCTION: linux_chkconfig_builtin
323 # @USAGE: option
324 # @RETURN: true or false
325 # @DESCRIPTION:
326 # It checks that CONFIG_<option>=y is present in the current kernel .config
327 # If linux_config_exists returns false, the results of this are UNDEFINED. You
328 # MUST call linux_config_exists first.
329 linux_chkconfig_builtin() {
330 linux_config_qa_check linux_chkconfig_builtin
331 [[ $(getfilevar_noexec "CONFIG_$1" "$(linux_config_path)") == y ]]
332 }
333
334 # @FUNCTION: linux_chkconfig_string
335 # @USAGE: option
336 # @RETURN: CONFIG_<option>
337 # @DESCRIPTION:
338 # It prints the CONFIG_<option> value of the current kernel .config (it requires a configured kernel).
339 # If linux_config_exists returns false, the results of this are UNDEFINED. You
340 # MUST call linux_config_exists first.
341 linux_chkconfig_string() {
342 linux_config_qa_check linux_chkconfig_string
343 getfilevar_noexec "CONFIG_$1" "$(linux_config_path)"
344 }
345
346 # Versioning Functions
347 # ---------------------------------------
348
349 # @FUNCTION: kernel_is
350 # @USAGE: [-lt -gt -le -ge -eq] major_number [minor_number patch_number]
351 # @RETURN: true or false
352 # @DESCRIPTION:
353 # It returns true when the current kernel version satisfies the comparison against the passed version.
354 # -eq is the default comparison.
355 #
356 # @CODE
357 # For Example where KV = 2.6.9
358 # kernel_is 2 4 returns false
359 # kernel_is 2 returns true
360 # kernel_is 2 6 returns true
361 # kernel_is 2 6 8 returns false
362 # kernel_is 2 6 9 returns true
363 # @CODE
364
365 # Note: duplicated in kernel-2.eclass
366 kernel_is() {
367 # if we haven't determined the version yet, we need to.
368 linux-info_get_any_version
369
370 # Now we can continue
371 local operator test value
372
373 case ${1#-} in
374 lt) operator="-lt"; shift;;
375 gt) operator="-gt"; shift;;
376 le) operator="-le"; shift;;
377 ge) operator="-ge"; shift;;
378 eq) operator="-eq"; shift;;
379 *) operator="-eq";;
380 esac
381 [[ $# -gt 3 ]] && die "Error in kernel-2_kernel_is(): too many parameters"
382
383 : $(( test = (KV_MAJOR << 16) + (KV_MINOR << 8) + KV_PATCH ))
384 : $(( value = (${1:-${KV_MAJOR}} << 16) + (${2:-${KV_MINOR}} << 8) + ${3:-${KV_PATCH}} ))
385 [ ${test} ${operator} ${value} ]
386 }
387
388 get_localversion() {
389 local lv_list i x
390
391 # ignore files with ~ in it.
392 for i in $(ls ${1}/localversion* 2>/dev/null); do
393 [[ -n ${i//*~*} ]] && lv_list="${lv_list} ${i}"
394 done
395
396 for i in ${lv_list}; do
397 x="${x}$(<${i})"
398 done
399 x=${x/ /}
400 echo ${x}
401 }
402
403 # Check if the Makefile is valid for direct parsing.
404 # Check status results:
405 # - PASS, use 'getfilevar' to extract values
406 # - FAIL, use 'getfilevar_noexec' to extract values
407 # The check may fail if:
408 # - make is not present
409 # - corruption exists in the kernel makefile
410 get_makefile_extract_function() {
411 local a='' b='' mkfunc='getfilevar'
412 a="$(getfilevar VERSION ${KERNEL_MAKEFILE})"
413 b="$(getfilevar_noexec VERSION ${KERNEL_MAKEFILE})"
414 [[ "${a}" != "${b}" ]] && mkfunc='getfilevar_noexec'
415 echo "${mkfunc}"
416 }
417
418 # internal variable, so we know to only print the warning once
419 get_version_warning_done=
420
421 # @FUNCTION: get_version
422 # @DESCRIPTION:
423 # It gets the version of the kernel inside KERNEL_DIR and populates the KV_FULL variable
424 # (if KV_FULL is already set it does nothing).
425 #
426 # The kernel version variables (KV_MAJOR, KV_MINOR, KV_PATCH, KV_EXTRA and KV_LOCAL) are also set.
427 #
428 # The KV_DIR is set using the KERNEL_DIR env var, the KV_DIR_OUT is set using a valid
429 # KBUILD_OUTPUT (in a decreasing priority list, we look for the env var, makefile var or the
430 # symlink /lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build).
431 get_version() {
432 local kbuild_output mkfunc tmplocal
433
434 # no need to execute this twice assuming KV_FULL is populated.
435 # we can force by unsetting KV_FULL
436 [ -n "${KV_FULL}" ] && return 0
437
438 # if we dont know KV_FULL, then we need too.
439 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
440 unset KV_DIR
441
442 # KV_DIR will contain the full path to the sources directory we should use
443 [ -z "${get_version_warning_done}" ] && \
444 qeinfo "Determining the location of the kernel source code"
445 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
446 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
447
448 if [ -z "${KV_DIR}" ]
449 then
450 if [ -z "${get_version_warning_done}" ]; then
451 get_version_warning_done=1
452 qeerror "Unable to find kernel sources at ${KERNEL_DIR}"
453 #qeinfo "This package requires Linux sources."
454 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
455 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
456 qeinfo "(or the kernel you wish to build against)."
457 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
458 else
459 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
460 fi
461 fi
462 return 1
463 fi
464
465 if [ -z "${get_version_warning_done}" ]; then
466 qeinfo "Found kernel source directory:"
467 qeinfo " ${KV_DIR}"
468 fi
469
470 if [ ! -s "${KV_DIR}/Makefile" ]
471 then
472 if [ -z "${get_version_warning_done}" ]; then
473 get_version_warning_done=1
474 qeerror "Could not find a Makefile in the kernel source directory."
475 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
476 fi
477 return 1
478 fi
479
480 # OK so now we know our sources directory, but they might be using
481 # KBUILD_OUTPUT, and we need this for .config and localversions-*
482 # so we better find it eh?
483 # do we pass KBUILD_OUTPUT on the CLI?
484 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}"
485
486 # keep track of it
487 KERNEL_MAKEFILE="${KV_DIR}/Makefile"
488
489 # Decide the function used to extract makefile variables.
490 mkfunc="$(get_makefile_extract_function "${KERNEL_MAKEFILE}")"
491
492 # And if we didn't pass it, we can take a nosey in the Makefile
493 kbuild_output="$(${mkfunc} KBUILD_OUTPUT ${KERNEL_MAKEFILE})"
494 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
495
496 # And contrary to existing functions I feel we shouldn't trust the
497 # directory name to find version information as this seems insane.
498 # so we parse ${KERNEL_MAKEFILE}
499 KV_MAJOR="$(${mkfunc} VERSION ${KERNEL_MAKEFILE})"
500 KV_MINOR="$(${mkfunc} PATCHLEVEL ${KERNEL_MAKEFILE})"
501 KV_PATCH="$(${mkfunc} SUBLEVEL ${KERNEL_MAKEFILE})"
502 KV_EXTRA="$(${mkfunc} EXTRAVERSION ${KERNEL_MAKEFILE})"
503
504 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
505 then
506 if [ -z "${get_version_warning_done}" ]; then
507 get_version_warning_done=1
508 qeerror "Could not detect kernel version."
509 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
510 fi
511 return 1
512 fi
513
514 # and in newer versions we can also pull LOCALVERSION if it is set.
515 # but before we do this, we need to find if we use a different object directory.
516 # This *WILL* break if the user is using localversions, but we assume it was
517 # caught before this if they are.
518 OUTPUT_DIR="${OUTPUT_DIR:-/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build}"
519
520 [ -h "${OUTPUT_DIR}" ] && KV_OUT_DIR="$(readlink -f ${OUTPUT_DIR})"
521 [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
522 if [ -n "${KV_OUT_DIR}" ];
523 then
524 qeinfo "Found kernel object directory:"
525 qeinfo " ${KV_OUT_DIR}"
526 fi
527 # and if we STILL have not got it, then we better just set it to KV_DIR
528 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
529
530 # Grab the kernel release from the output directory.
531 # TODO: we MUST detect kernel.release being out of date, and 'return 1' from
532 # this function.
533 if [ -s "${KV_OUT_DIR}"/include/config/kernel.release ]; then
534 KV_LOCAL=$(<"${KV_OUT_DIR}"/include/config/kernel.release)
535 elif [ -s "${KV_OUT_DIR}"/.kernelrelease ]; then
536 KV_LOCAL=$(<"${KV_OUT_DIR}"/.kernelrelease)
537 else
538 KV_LOCAL=
539 fi
540
541 # KV_LOCAL currently contains the full release; discard the first bits.
542 tmplocal=${KV_LOCAL#${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}}
543
544 # If the updated local version was not changed, the tree is not prepared.
545 # Clear out KV_LOCAL in that case.
546 # TODO: this does not detect a change in the localversion part between
547 # kernel.release and the value that would be generated.
548 if [ "$KV_LOCAL" = "$tmplocal" ]; then
549 KV_LOCAL=
550 else
551 KV_LOCAL=$tmplocal
552 fi
553
554 # And we should set KV_FULL to the full expanded version
555 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
556
557 qeinfo "Found sources for kernel version:"
558 qeinfo " ${KV_FULL}"
559
560 return 0
561 }
562
563 # @FUNCTION: get_running_version
564 # @DESCRIPTION:
565 # It gets the version of the current running kernel and the result is the same as get_version() if the
566 # function can find the sources.
567 get_running_version() {
568 KV_FULL=$(uname -r)
569
570 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile && -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
571 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
572 KBUILD_OUTPUT=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
573 unset KV_FULL
574 get_version
575 return $?
576 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
577 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
578 unset KV_FULL
579 get_version
580 return $?
581 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
582 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
583 unset KV_FULL
584 get_version
585 return $?
586 else
587 # This handles a variety of weird kernel versions. Make sure to update
588 # tests/linux-info:get_running_version.sh if you want to change this.
589 local kv_full=${KV_FULL//[-+_]*}
590 KV_MAJOR=$(get_version_component_range 1 ${kv_full})
591 KV_MINOR=$(get_version_component_range 2 ${kv_full})
592 KV_PATCH=$(get_version_component_range 3 ${kv_full})
593 KV_EXTRA="${KV_FULL#${KV_MAJOR}.${KV_MINOR}${KV_PATCH:+.${KV_PATCH}}}"
594 : ${KV_PATCH:=0}
595 fi
596 return 0
597 }
598
599 # This next function is named with the eclass prefix to avoid conflicts with
600 # some old versionator-like eclass functions.
601
602 # @FUNCTION: linux-info_get_any_version
603 # @DESCRIPTION:
604 # This attempts to find the version of the sources, and otherwise falls back to
605 # the version of the running kernel.
606 linux-info_get_any_version() {
607 get_version
608 if [[ $? -ne 0 ]]; then
609 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
610 get_running_version
611 fi
612 }
613
614
615 # ebuild check functions
616 # ---------------------------------------
617
618 # @FUNCTION: check_kernel_built
619 # @DESCRIPTION:
620 # This function verifies that the current kernel sources have been already prepared otherwise it dies.
621 check_kernel_built() {
622 # if we haven't determined the version yet, we need to
623 require_configured_kernel
624 get_version
625
626 local versionh_path
627 if kernel_is -ge 3 7; then
628 versionh_path="include/generated/uapi/linux/version.h"
629 else
630 versionh_path="include/linux/version.h"
631 fi
632
633 if [ ! -f "${KV_OUT_DIR}/${versionh_path}" ]
634 then
635 eerror "These sources have not yet been prepared."
636 eerror "We cannot build against an unprepared tree."
637 eerror "To resolve this, please type the following:"
638 eerror
639 eerror "# cd ${KV_DIR}"
640 eerror "# make oldconfig"
641 eerror "# make modules_prepare"
642 eerror
643 eerror "Then please try merging this module again."
644 die "Kernel sources need compiling first"
645 fi
646 }
647
648 # @FUNCTION: check_modules_supported
649 # @DESCRIPTION:
650 # This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
651 check_modules_supported() {
652 # if we haven't determined the version yet, we need too.
653 require_configured_kernel
654 get_version
655
656 if ! linux_chkconfig_builtin "MODULES"; then
657 eerror "These sources do not support loading external modules."
658 eerror "to be able to use this module please enable \"Loadable modules support\""
659 eerror "in your kernel, recompile and then try merging this module again."
660 die "No support for external modules in ${KV_FULL} config"
661 fi
662 }
663
664 # @FUNCTION: check_extra_config
665 # @DESCRIPTION:
666 # It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
667 # the prefix ~ is not used) doesn't satisfy the directive.
668 check_extra_config() {
669 local config negate die error reworkmodulenames
670 local soft_errors_count=0 hard_errors_count=0 config_required=0
671 # store the value of the QA check, because otherwise we won't catch usages
672 # after if check_extra_config is called AND other direct calls are done
673 # later.
674 local old_LINUX_CONFIG_EXISTS_DONE="${_LINUX_CONFIG_EXISTS_DONE}"
675
676 # if we haven't determined the version yet, we need to
677 linux-info_get_any_version
678
679 # Determine if we really need a .config. The only time when we don't need
680 # one is when all of the CONFIG_CHECK options are prefixed with "~".
681 for config in ${CONFIG_CHECK}; do
682 if [[ "${config:0:1}" != "~" ]]; then
683 config_required=1
684 break
685 fi
686 done
687
688 if [[ ${config_required} == 0 ]]; then
689 # In the case where we don't require a .config, we can now bail out
690 # if the user has no .config as there is nothing to do. Otherwise
691 # code later will cause a failure due to missing .config.
692 if ! linux_config_exists; then
693 ewarn "Unable to check for the following kernel config options due"
694 ewarn "to absence of any configured kernel sources or compiled"
695 ewarn "config:"
696 for config in ${CONFIG_CHECK}; do
697 local_error="ERROR_${config#\~}"
698 msg="${!local_error}"
699 if [[ "x${msg}" == "x" ]]; then
700 local_error="WARNING_${config#\~}"
701 msg="${!local_error}"
702 fi
703 ewarn " - ${config#\~}${msg:+ - }${msg}"
704 done
705 ewarn "You're on your own to make sure they are set if needed."
706 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
707 return 0
708 fi
709 else
710 require_configured_kernel
711 fi
712
713 einfo "Checking for suitable kernel configuration options..."
714
715 for config in ${CONFIG_CHECK}
716 do
717 # if we specify any fatal, ensure we honor them
718 die=1
719 error=0
720 negate=0
721 reworkmodulenames=0
722
723 if [[ ${config:0:1} == "~" ]]; then
724 die=0
725 config=${config:1}
726 elif [[ ${config:0:1} == "@" ]]; then
727 die=0
728 reworkmodulenames=1
729 config=${config:1}
730 fi
731 if [[ ${config:0:1} == "!" ]]; then
732 negate=1
733 config=${config:1}
734 fi
735
736 if [[ ${negate} == 1 ]]; then
737 linux_chkconfig_present ${config} && error=2
738 elif [[ ${reworkmodulenames} == 1 ]]; then
739 local temp_config="${config//*:}" i n
740 config="${config//:*}"
741 if linux_chkconfig_present ${config}; then
742 for i in ${MODULE_NAMES}; do
743 n="${i//${temp_config}}"
744 [[ -z ${n//\(*} ]] && \
745 MODULE_IGNORE="${MODULE_IGNORE} ${temp_config}"
746 done
747 error=2
748 fi
749 else
750 linux_chkconfig_present ${config} || error=1
751 fi
752
753 if [[ ${error} > 0 ]]; then
754 local report_func="eerror" local_error
755 local_error="ERROR_${config}"
756 local_error="${!local_error}"
757
758 if [[ -z "${local_error}" ]]; then
759 # using old, deprecated format.
760 local_error="${config}_ERROR"
761 local_error="${!local_error}"
762 fi
763 if [[ ${die} == 0 && -z "${local_error}" ]]; then
764 #soft errors can be warnings
765 local_error="WARNING_${config}"
766 local_error="${!local_error}"
767 if [[ -n "${local_error}" ]] ; then
768 report_func="ewarn"
769 fi
770 fi
771
772 if [[ -z "${local_error}" ]]; then
773 [[ ${error} == 1 ]] \
774 && local_error="is not set when it should be." \
775 || local_error="should not be set. But it is."
776 local_error="CONFIG_${config}:\t ${local_error}"
777 fi
778 if [[ ${die} == 0 ]]; then
779 ${report_func} " ${local_error}"
780 soft_errors_count=$[soft_errors_count + 1]
781 else
782 ${report_func} " ${local_error}"
783 hard_errors_count=$[hard_errors_count + 1]
784 fi
785 fi
786 done
787
788 if [[ ${hard_errors_count} > 0 ]]; then
789 eerror "Please check to make sure these options are set correctly."
790 eerror "Failure to do so may cause unexpected problems."
791 eerror "Once you have satisfied these options, please try merging"
792 eerror "this package again."
793 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
794 die "Incorrect kernel configuration options"
795 elif [[ ${soft_errors_count} > 0 ]]; then
796 ewarn "Please check to make sure these options are set correctly."
797 ewarn "Failure to do so may cause unexpected problems."
798 else
799 eend 0
800 fi
801 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
802 }
803
804 check_zlibinflate() {
805 # if we haven't determined the version yet, we need to
806 require_configured_kernel
807 get_version
808
809 # although I restructured this code - I really really really dont support it!
810
811 # bug #27882 - zlib routines are only linked into the kernel
812 # if something compiled into the kernel calls them
813 #
814 # plus, for the cloop module, it appears that there's no way
815 # to get cloop.o to include a static zlib if CONFIG_MODVERSIONS
816 # is on
817
818 local INFLATE
819 local DEFLATE
820
821 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
822
823 ebegin "checking ZLIB_INFLATE"
824 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
825 eend $?
826 [ "$?" != 0 ] && die
827
828 ebegin "checking ZLIB_DEFLATE"
829 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
830 eend $?
831 [ "$?" != 0 ] && die
832
833 local LINENO_START
834 local LINENO_END
835 local SYMBOLS
836 local x
837
838 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
839 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
840 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
841 (( LINENO_END = $LINENO_END - 1 ))
842 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
843
844 # okay, now we have a list of symbols
845 # we need to check each one in turn, to see whether it is set or not
846 for x in $SYMBOLS ; do
847 if [ "${!x}" = "y" ]; then
848 # we have a winner!
849 einfo "${x} ensures zlib is linked into your kernel - excellent"
850 return 0
851 fi
852 done
853
854 eerror
855 eerror "This kernel module requires ZLIB library support."
856 eerror "You have enabled zlib support in your kernel, but haven't enabled"
857 eerror "enabled any option that will ensure that zlib is linked into your"
858 eerror "kernel."
859 eerror
860 eerror "Please ensure that you enable at least one of these options:"
861 eerror
862
863 for x in $SYMBOLS ; do
864 eerror " * $x"
865 done
866
867 eerror
868 eerror "Please remember to recompile and install your kernel, and reboot"
869 eerror "into your new kernel before attempting to load this kernel module."
870
871 die "Kernel doesn't include zlib support"
872 }
873
874 ################################
875 # Default pkg_setup
876 # Also used when inheriting linux-mod to force a get_version call
877 # @FUNCTION: linux-info_pkg_setup
878 # @DESCRIPTION:
879 # Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
880 # to support the options specified in CONFIG_CHECK (if not null)
881 linux-info_pkg_setup() {
882 linux-info_get_any_version
883
884 if kernel_is 2 4; then
885 if [ "$( gcc-major-version )" -eq "4" ] ; then
886 echo
887 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"
888 ewarn "linux-2.4 (or modules building against a linux-2.4 kernel)!"
889 echo
890 ewarn "Either switch to another gcc-version (via gcc-config) or use a"
891 ewarn "newer kernel that supports gcc-4."
892 echo
893 ewarn "Also be aware that bugreports about gcc-4 not working"
894 ewarn "with linux-2.4 based ebuilds will be closed as INVALID!"
895 echo
896 epause 10
897 fi
898 fi
899
900 [ -n "${CONFIG_CHECK}" ] && check_extra_config;
901 }

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