/[gentoo-x86]/eclass/linux-info.eclass
Gentoo

Contents of /eclass/linux-info.eclass

Parent Directory Parent Directory | Revision Log Revision Log


Revision 1.98 - (show annotations) (download)
Sun Feb 10 06:18:19 2013 UTC (18 months, 1 week ago) by vapier
Branch: MAIN
Changes since 1.97: +4 -2 lines
use emake rather than make to extract variable values #373151 by Kevin Pyle

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 1.97 2013/02/10 02:21:55 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 DEPEND=""
115 RDEPEND=""
116
117 # Overwritable environment Var's
118 # ---------------------------------------
119 KERNEL_DIR="${KERNEL_DIR:-${ROOT}usr/src/linux}"
120
121
122 # Bug fixes
123 # fix to bug #75034
124 case ${ARCH} in
125 ppc) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
126 ppc64) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
127 esac
128
129 # @FUNCTION: set_arch_to_kernel
130 # @DESCRIPTION:
131 # Set the env ARCH to match what the kernel expects.
132 set_arch_to_kernel() { export ARCH=$(tc-arch-kernel); }
133 # @FUNCTION: set_arch_to_portage
134 # @DESCRIPTION:
135 # Set the env ARCH to match what portage expects.
136 set_arch_to_portage() { export ARCH=$(tc-arch); }
137
138 # qeinfo "Message"
139 # -------------------
140 # qeinfo is a quiet einfo call when EBUILD_PHASE
141 # should not have visible output.
142 qout() {
143 local outputmsg type
144 type=${1}
145 shift
146 outputmsg="${@}"
147 case "${EBUILD_PHASE}" in
148 depend) unset outputmsg;;
149 clean) unset outputmsg;;
150 preinst) unset outputmsg;;
151 esac
152 [ -n "${outputmsg}" ] && ${type} "${outputmsg}"
153 }
154
155 qeinfo() { qout einfo "${@}" ; }
156 qewarn() { qout ewarn "${@}" ; }
157 qeerror() { qout eerror "${@}" ; }
158
159 # File Functions
160 # ---------------------------------------
161
162 # @FUNCTION: getfilevar
163 # @USAGE: variable configfile
164 # @RETURN: the value of the variable
165 # @DESCRIPTION:
166 # It detects the value of the variable defined in the file configfile. This is
167 # done by including the configfile, and printing the variable with Make.
168 # It WILL break if your makefile has missing dependencies!
169 getfilevar() {
170 local ERROR basefname basedname myARCH="${ARCH}"
171 ERROR=0
172
173 [ -z "${1}" ] && ERROR=1
174 [ ! -f "${2}" ] && ERROR=1
175
176 if [ "${ERROR}" = 1 ]
177 then
178 echo -e "\n"
179 eerror "getfilevar requires 2 variables, with the second a valid file."
180 eerror " getfilevar <VARIABLE> <CONFIGFILE>"
181 else
182 basefname="$(basename ${2})"
183 basedname="$(dirname ${2})"
184 unset ARCH
185
186 # We use nonfatal because we want the caller to take care of things #373151
187 [[ ${EAPI:-0} == [0123] ]] && nonfatal() { "$@"; }
188 echo -e "e:\\n\\t@echo \$(${1})\\ninclude ${basefname}" | \
189 nonfatal emake -C "${basedname}" M="${S}" ${BUILD_FIXES} -s -f - 2>/dev/null
190
191 ARCH=${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 kbuild_output mkfunc 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 qeerror "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 ${KERNEL_DIR} points at your running kernel, "
459 qeinfo "(or the kernel you wish to build against)."
460 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
461 else
462 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
463 fi
464 fi
465 return 1
466 fi
467
468 if [ -z "${get_version_warning_done}" ]; then
469 qeinfo "Found kernel source directory:"
470 qeinfo " ${KV_DIR}"
471 fi
472
473 if [ ! -s "${KV_DIR}/Makefile" ]
474 then
475 if [ -z "${get_version_warning_done}" ]; then
476 get_version_warning_done=1
477 qeerror "Could not find a Makefile in the kernel source directory."
478 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
479 fi
480 return 1
481 fi
482
483 # OK so now we know our sources directory, but they might be using
484 # KBUILD_OUTPUT, and we need this for .config and localversions-*
485 # so we better find it eh?
486 # do we pass KBUILD_OUTPUT on the CLI?
487 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}"
488
489 # keep track of it
490 KERNEL_MAKEFILE="${KV_DIR}/Makefile"
491
492 # Decide the function used to extract makefile variables.
493 mkfunc="$(get_makefile_extract_function "${KERNEL_MAKEFILE}")"
494
495 # And if we didn't pass it, we can take a nosey in the Makefile
496 kbuild_output="$(${mkfunc} KBUILD_OUTPUT ${KERNEL_MAKEFILE})"
497 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
498
499 # And contrary to existing functions I feel we shouldn't trust the
500 # directory name to find version information as this seems insane.
501 # so we parse ${KERNEL_MAKEFILE}
502 KV_MAJOR="$(${mkfunc} VERSION ${KERNEL_MAKEFILE})"
503 KV_MINOR="$(${mkfunc} PATCHLEVEL ${KERNEL_MAKEFILE})"
504 KV_PATCH="$(${mkfunc} SUBLEVEL ${KERNEL_MAKEFILE})"
505 KV_EXTRA="$(${mkfunc} EXTRAVERSION ${KERNEL_MAKEFILE})"
506
507 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
508 then
509 if [ -z "${get_version_warning_done}" ]; then
510 get_version_warning_done=1
511 qeerror "Could not detect kernel version."
512 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
513 fi
514 return 1
515 fi
516
517 # and in newer versions we can also pull LOCALVERSION if it is set.
518 # but before we do this, we need to find if we use a different object directory.
519 # This *WILL* break if the user is using localversions, but we assume it was
520 # caught before this if they are.
521 OUTPUT_DIR="${OUTPUT_DIR:-/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build}"
522
523 [ -h "${OUTPUT_DIR}" ] && KV_OUT_DIR="$(readlink -f ${OUTPUT_DIR})"
524 [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
525 if [ -n "${KV_OUT_DIR}" ];
526 then
527 qeinfo "Found kernel object directory:"
528 qeinfo " ${KV_OUT_DIR}"
529 fi
530 # and if we STILL have not got it, then we better just set it to KV_DIR
531 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
532
533 # Grab the kernel release from the output directory.
534 # TODO: we MUST detect kernel.release being out of date, and 'return 1' from
535 # this function.
536 if [ -s "${KV_OUT_DIR}"/include/config/kernel.release ]; then
537 KV_LOCAL=$(<"${KV_OUT_DIR}"/include/config/kernel.release)
538 elif [ -s "${KV_OUT_DIR}"/.kernelrelease ]; then
539 KV_LOCAL=$(<"${KV_OUT_DIR}"/.kernelrelease)
540 else
541 KV_LOCAL=
542 fi
543
544 # KV_LOCAL currently contains the full release; discard the first bits.
545 tmplocal=${KV_LOCAL#${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}}
546
547 # If the updated local version was not changed, the tree is not prepared.
548 # Clear out KV_LOCAL in that case.
549 # TODO: this does not detect a change in the localversion part between
550 # kernel.release and the value that would be generated.
551 if [ "$KV_LOCAL" = "$tmplocal" ]; then
552 KV_LOCAL=
553 else
554 KV_LOCAL=$tmplocal
555 fi
556
557 # And we should set KV_FULL to the full expanded version
558 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
559
560 qeinfo "Found sources for kernel version:"
561 qeinfo " ${KV_FULL}"
562
563 return 0
564 }
565
566 # @FUNCTION: get_running_version
567 # @DESCRIPTION:
568 # It gets the version of the current running kernel and the result is the same as get_version() if the
569 # function can find the sources.
570 get_running_version() {
571 KV_FULL=$(uname -r)
572
573 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile && -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
574 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
575 KBUILD_OUTPUT=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
576 unset KV_FULL
577 get_version
578 return $?
579 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
580 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
581 unset KV_FULL
582 get_version
583 return $?
584 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
585 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
586 unset KV_FULL
587 get_version
588 return $?
589 else
590 # This handles a variety of weird kernel versions. Make sure to update
591 # tests/linux-info:get_running_version.sh if you want to change this.
592 local kv_full=${KV_FULL//[-+_]*}
593 KV_MAJOR=$(get_version_component_range 1 ${kv_full})
594 KV_MINOR=$(get_version_component_range 2 ${kv_full})
595 KV_PATCH=$(get_version_component_range 3 ${kv_full})
596 KV_EXTRA="${KV_FULL#${KV_MAJOR}.${KV_MINOR}${KV_PATCH:+.${KV_PATCH}}}"
597 : ${KV_PATCH:=0}
598 fi
599 return 0
600 }
601
602 # This next function is named with the eclass prefix to avoid conflicts with
603 # some old versionator-like eclass functions.
604
605 # @FUNCTION: linux-info_get_any_version
606 # @DESCRIPTION:
607 # This attempts to find the version of the sources, and otherwise falls back to
608 # the version of the running kernel.
609 linux-info_get_any_version() {
610 get_version
611 if [[ $? -ne 0 ]]; then
612 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
613 get_running_version
614 fi
615 }
616
617
618 # ebuild check functions
619 # ---------------------------------------
620
621 # @FUNCTION: check_kernel_built
622 # @DESCRIPTION:
623 # This function verifies that the current kernel sources have been already prepared otherwise it dies.
624 check_kernel_built() {
625 # if we haven't determined the version yet, we need to
626 require_configured_kernel
627 get_version
628
629 local versionh_path
630 if kernel_is -ge 3 7; then
631 versionh_path="include/generated/uapi/linux/version.h"
632 else
633 versionh_path="include/linux/version.h"
634 fi
635
636 if [ ! -f "${KV_OUT_DIR}/${versionh_path}" ]
637 then
638 eerror "These sources have not yet been prepared."
639 eerror "We cannot build against an unprepared tree."
640 eerror "To resolve this, please type the following:"
641 eerror
642 eerror "# cd ${KV_DIR}"
643 eerror "# make oldconfig"
644 eerror "# make modules_prepare"
645 eerror
646 eerror "Then please try merging this module again."
647 die "Kernel sources need compiling first"
648 fi
649 }
650
651 # @FUNCTION: check_modules_supported
652 # @DESCRIPTION:
653 # This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
654 check_modules_supported() {
655 # if we haven't determined the version yet, we need too.
656 require_configured_kernel
657 get_version
658
659 if ! linux_chkconfig_builtin "MODULES"; then
660 eerror "These sources do not support loading external modules."
661 eerror "to be able to use this module please enable \"Loadable modules support\""
662 eerror "in your kernel, recompile and then try merging this module again."
663 die "No support for external modules in ${KV_FULL} config"
664 fi
665 }
666
667 # @FUNCTION: check_extra_config
668 # @DESCRIPTION:
669 # It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
670 # the prefix ~ is not used) doesn't satisfy the directive.
671 check_extra_config() {
672 local config negate die error reworkmodulenames
673 local soft_errors_count=0 hard_errors_count=0 config_required=0
674 # store the value of the QA check, because otherwise we won't catch usages
675 # after if check_extra_config is called AND other direct calls are done
676 # later.
677 local old_LINUX_CONFIG_EXISTS_DONE="${_LINUX_CONFIG_EXISTS_DONE}"
678
679 # if we haven't determined the version yet, we need to
680 linux-info_get_any_version
681
682 # Determine if we really need a .config. The only time when we don't need
683 # one is when all of the CONFIG_CHECK options are prefixed with "~".
684 for config in ${CONFIG_CHECK}; do
685 if [[ "${config:0:1}" != "~" ]]; then
686 config_required=1
687 break
688 fi
689 done
690
691 if [[ ${config_required} == 0 ]]; then
692 # In the case where we don't require a .config, we can now bail out
693 # if the user has no .config as there is nothing to do. Otherwise
694 # code later will cause a failure due to missing .config.
695 if ! linux_config_exists; then
696 ewarn "Unable to check for the following kernel config options due"
697 ewarn "to absence of any configured kernel sources or compiled"
698 ewarn "config:"
699 for config in ${CONFIG_CHECK}; do
700 local_error="ERROR_${config#\~}"
701 msg="${!local_error}"
702 if [[ "x${msg}" == "x" ]]; then
703 local_error="WARNING_${config#\~}"
704 msg="${!local_error}"
705 fi
706 ewarn " - ${config#\~}${msg:+ - }${msg}"
707 done
708 ewarn "You're on your own to make sure they are set if needed."
709 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
710 return 0
711 fi
712 else
713 require_configured_kernel
714 fi
715
716 einfo "Checking for suitable kernel configuration options..."
717
718 for config in ${CONFIG_CHECK}
719 do
720 # if we specify any fatal, ensure we honor them
721 die=1
722 error=0
723 negate=0
724 reworkmodulenames=0
725
726 if [[ ${config:0:1} == "~" ]]; then
727 die=0
728 config=${config:1}
729 elif [[ ${config:0:1} == "@" ]]; then
730 die=0
731 reworkmodulenames=1
732 config=${config:1}
733 fi
734 if [[ ${config:0:1} == "!" ]]; then
735 negate=1
736 config=${config:1}
737 fi
738
739 if [[ ${negate} == 1 ]]; then
740 linux_chkconfig_present ${config} && error=2
741 elif [[ ${reworkmodulenames} == 1 ]]; then
742 local temp_config="${config//*:}" i n
743 config="${config//:*}"
744 if linux_chkconfig_present ${config}; then
745 for i in ${MODULE_NAMES}; do
746 n="${i//${temp_config}}"
747 [[ -z ${n//\(*} ]] && \
748 MODULE_IGNORE="${MODULE_IGNORE} ${temp_config}"
749 done
750 error=2
751 fi
752 else
753 linux_chkconfig_present ${config} || error=1
754 fi
755
756 if [[ ${error} > 0 ]]; then
757 local report_func="eerror" local_error
758 local_error="ERROR_${config}"
759 local_error="${!local_error}"
760
761 if [[ -z "${local_error}" ]]; then
762 # using old, deprecated format.
763 local_error="${config}_ERROR"
764 local_error="${!local_error}"
765 fi
766 if [[ ${die} == 0 && -z "${local_error}" ]]; then
767 #soft errors can be warnings
768 local_error="WARNING_${config}"
769 local_error="${!local_error}"
770 if [[ -n "${local_error}" ]] ; then
771 report_func="ewarn"
772 fi
773 fi
774
775 if [[ -z "${local_error}" ]]; then
776 [[ ${error} == 1 ]] \
777 && local_error="is not set when it should be." \
778 || local_error="should not be set. But it is."
779 local_error="CONFIG_${config}:\t ${local_error}"
780 fi
781 if [[ ${die} == 0 ]]; then
782 ${report_func} " ${local_error}"
783 soft_errors_count=$[soft_errors_count + 1]
784 else
785 ${report_func} " ${local_error}"
786 hard_errors_count=$[hard_errors_count + 1]
787 fi
788 fi
789 done
790
791 if [[ ${hard_errors_count} > 0 ]]; then
792 eerror "Please check to make sure these options are set correctly."
793 eerror "Failure to do so may cause unexpected problems."
794 eerror "Once you have satisfied these options, please try merging"
795 eerror "this package again."
796 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
797 die "Incorrect kernel configuration options"
798 elif [[ ${soft_errors_count} > 0 ]]; then
799 ewarn "Please check to make sure these options are set correctly."
800 ewarn "Failure to do so may cause unexpected problems."
801 else
802 eend 0
803 fi
804 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
805 }
806
807 check_zlibinflate() {
808 # if we haven't determined the version yet, we need to
809 require_configured_kernel
810 get_version
811
812 # although I restructured this code - I really really really dont support it!
813
814 # bug #27882 - zlib routines are only linked into the kernel
815 # if something compiled into the kernel calls them
816 #
817 # plus, for the cloop module, it appears that there's no way
818 # to get cloop.o to include a static zlib if CONFIG_MODVERSIONS
819 # is on
820
821 local INFLATE
822 local DEFLATE
823
824 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
825
826 ebegin "checking ZLIB_INFLATE"
827 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
828 eend $?
829 [ "$?" != 0 ] && die
830
831 ebegin "checking ZLIB_DEFLATE"
832 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
833 eend $?
834 [ "$?" != 0 ] && die
835
836 local LINENO_START
837 local LINENO_END
838 local SYMBOLS
839 local x
840
841 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
842 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
843 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
844 (( LINENO_END = $LINENO_END - 1 ))
845 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
846
847 # okay, now we have a list of symbols
848 # we need to check each one in turn, to see whether it is set or not
849 for x in $SYMBOLS ; do
850 if [ "${!x}" = "y" ]; then
851 # we have a winner!
852 einfo "${x} ensures zlib is linked into your kernel - excellent"
853 return 0
854 fi
855 done
856
857 eerror
858 eerror "This kernel module requires ZLIB library support."
859 eerror "You have enabled zlib support in your kernel, but haven't enabled"
860 eerror "enabled any option that will ensure that zlib is linked into your"
861 eerror "kernel."
862 eerror
863 eerror "Please ensure that you enable at least one of these options:"
864 eerror
865
866 for x in $SYMBOLS ; do
867 eerror " * $x"
868 done
869
870 eerror
871 eerror "Please remember to recompile and install your kernel, and reboot"
872 eerror "into your new kernel before attempting to load this kernel module."
873
874 die "Kernel doesn't include zlib support"
875 }
876
877 ################################
878 # Default pkg_setup
879 # Also used when inheriting linux-mod to force a get_version call
880 # @FUNCTION: linux-info_pkg_setup
881 # @DESCRIPTION:
882 # Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
883 # to support the options specified in CONFIG_CHECK (if not null)
884 linux-info_pkg_setup() {
885 linux-info_get_any_version
886
887 if kernel_is 2 4; then
888 if [ "$( gcc-major-version )" -eq "4" ] ; then
889 echo
890 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"
891 ewarn "linux-2.4 (or modules building against a linux-2.4 kernel)!"
892 echo
893 ewarn "Either switch to another gcc-version (via gcc-config) or use a"
894 ewarn "newer kernel that supports gcc-4."
895 echo
896 ewarn "Also be aware that bugreports about gcc-4 not working"
897 ewarn "with linux-2.4 based ebuilds will be closed as INVALID!"
898 echo
899 epause 10
900 fi
901 fi
902
903 [ -n "${CONFIG_CHECK}" ] && check_extra_config;
904 }

  ViewVC Help
Powered by ViewVC 1.1.20