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Revision 1.96 - (show annotations) (download)
Thu Jan 24 20:47:23 2013 UTC (19 months, 4 weeks ago) by vapier
Branch: MAIN
Changes since 1.95: +9 -6 lines
handle more kernel versions like 3.7-trunk-amd64 and add a testsuite for it

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 1.95 2013/01/16 14:29:01 zmedico 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 ${2})"
184 unset ARCH
185
186 echo -e "e:\\n\\t@echo \$(${1})\\ninclude ${basefname}" | \
187 make -C "${basedname}" M="${S}" ${BUILD_FIXES} -s -f - 2>/dev/null
188
189 ARCH=${myARCH}
190 fi
191 }
192
193 # @FUNCTION: getfilevar_noexec
194 # @USAGE: variable configfile
195 # @RETURN: the value of the variable
196 # @DESCRIPTION:
197 # It detects the value of the variable defined in the file configfile.
198 # This is done with sed matching an expression only. If the variable is defined,
199 # you will run into problems. See getfilevar for those cases.
200 getfilevar_noexec() {
201 local ERROR basefname basedname mycat myARCH="${ARCH}"
202 ERROR=0
203 mycat='cat'
204
205 [ -z "${1}" ] && ERROR=1
206 [ ! -f "${2}" ] && ERROR=1
207 [ "${2%.gz}" != "${2}" ] && mycat='zcat'
208
209 if [ "${ERROR}" = 1 ]
210 then
211 echo -e "\n"
212 eerror "getfilevar_noexec requires 2 variables, with the second a valid file."
213 eerror " getfilevar_noexec <VARIABLE> <CONFIGFILE>"
214 else
215 ${mycat} "${2}" | \
216 sed -n \
217 -e "/^[[:space:]]*${1}[[:space:]]*:\\?=[[:space:]]*\(.*\)\$/{
218 s,^[^=]*[[:space:]]*=[[:space:]]*,,g ;
219 s,[[:space:]]*\$,,g ;
220 p
221 }"
222 fi
223 }
224
225 # @ECLASS-VARIABLE: _LINUX_CONFIG_EXISTS_DONE
226 # @INTERNAL
227 # @DESCRIPTION:
228 # This is only set if one of the linux_config_*exists functions has been called.
229 # We use it for a QA warning that the check for a config has not been performed,
230 # as linux_chkconfig* in non-legacy mode WILL return an undefined value if no
231 # config is available at all.
232 _LINUX_CONFIG_EXISTS_DONE=
233
234 linux_config_qa_check() {
235 local f="$1"
236 if [ -z "${_LINUX_CONFIG_EXISTS_DONE}" ]; then
237 ewarn "QA: You called $f before any linux_config_exists!"
238 ewarn "QA: The return value of $f will NOT guaranteed later!"
239 fi
240 }
241
242 # @FUNCTION: linux_config_src_exists
243 # @RETURN: true or false
244 # @DESCRIPTION:
245 # It returns true if .config exists in a build directory otherwise false
246 linux_config_src_exists() {
247 export _LINUX_CONFIG_EXISTS_DONE=1
248 [ -s "${KV_OUT_DIR}/.config" ]
249 }
250
251 # @FUNCTION: linux_config_bin_exists
252 # @RETURN: true or false
253 # @DESCRIPTION:
254 # It returns true if .config exists in /proc, otherwise false
255 linux_config_bin_exists() {
256 export _LINUX_CONFIG_EXISTS_DONE=1
257 [ -s "/proc/config.gz" ]
258 }
259
260 # @FUNCTION: linux_config_exists
261 # @RETURN: true or false
262 # @DESCRIPTION:
263 # It returns true if .config exists otherwise false
264 #
265 # This function MUST be checked before using any of the linux_chkconfig_*
266 # functions.
267 linux_config_exists() {
268 linux_config_src_exists || linux_config_bin_exists
269 }
270
271 # @FUNCTION: require_configured_kernel
272 # @DESCRIPTION:
273 # This function verifies that the current kernel is configured (it checks against the existence of .config)
274 # otherwise it dies.
275 require_configured_kernel() {
276 if ! linux_config_src_exists; then
277 qeerror "Could not find a usable .config in the kernel source directory."
278 qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources."
279 qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that"
280 qeerror "it points to the necessary object directory so that it might find .config."
281 die "Kernel not configured; no .config found in ${KV_OUT_DIR}"
282 fi
283 }
284
285 # @FUNCTION: linux_chkconfig_present
286 # @USAGE: option
287 # @RETURN: true or false
288 # @DESCRIPTION:
289 # It checks that CONFIG_<option>=y or CONFIG_<option>=m is present in the current kernel .config
290 # If linux_config_exists returns false, the results of this are UNDEFINED. You
291 # MUST call linux_config_exists first.
292 linux_chkconfig_present() {
293 linux_config_qa_check linux_chkconfig_present
294 local RESULT config
295 config="${KV_OUT_DIR}/.config"
296 [ ! -f "${config}" ] && config="/proc/config.gz"
297 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
298 [ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1
299 }
300
301 # @FUNCTION: linux_chkconfig_module
302 # @USAGE: option
303 # @RETURN: true or false
304 # @DESCRIPTION:
305 # It checks that 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_module() {
309 linux_config_qa_check linux_chkconfig_module
310 local RESULT config
311 config="${KV_OUT_DIR}/.config"
312 [ ! -f "${config}" ] && config="/proc/config.gz"
313 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
314 [ "${RESULT}" = "m" ] && return 0 || return 1
315 }
316
317 # @FUNCTION: linux_chkconfig_builtin
318 # @USAGE: option
319 # @RETURN: true or false
320 # @DESCRIPTION:
321 # It checks that CONFIG_<option>=y is present in the current kernel .config
322 # If linux_config_exists returns false, the results of this are UNDEFINED. You
323 # MUST call linux_config_exists first.
324 linux_chkconfig_builtin() {
325 linux_config_qa_check linux_chkconfig_builtin
326 local RESULT config
327 config="${KV_OUT_DIR}/.config"
328 [ ! -f "${config}" ] && config="/proc/config.gz"
329 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
330 [ "${RESULT}" = "y" ] && return 0 || return 1
331 }
332
333 # @FUNCTION: linux_chkconfig_string
334 # @USAGE: option
335 # @RETURN: CONFIG_<option>
336 # @DESCRIPTION:
337 # It prints the CONFIG_<option> value of the current kernel .config (it requires a configured kernel).
338 # If linux_config_exists returns false, the results of this are UNDEFINED. You
339 # MUST call linux_config_exists first.
340 linux_chkconfig_string() {
341 linux_config_qa_check linux_chkconfig_string
342 local config
343 config="${KV_OUT_DIR}/.config"
344 [ ! -f "${config}" ] && config="/proc/config.gz"
345 getfilevar_noexec "CONFIG_${1}" "${config}"
346 }
347
348 # Versioning Functions
349 # ---------------------------------------
350
351 # @FUNCTION: kernel_is
352 # @USAGE: [-lt -gt -le -ge -eq] major_number [minor_number patch_number]
353 # @RETURN: true or false
354 # @DESCRIPTION:
355 # It returns true when the current kernel version satisfies the comparison against the passed version.
356 # -eq is the default comparison.
357 #
358 # @CODE
359 # For Example where KV = 2.6.9
360 # kernel_is 2 4 returns false
361 # kernel_is 2 returns true
362 # kernel_is 2 6 returns true
363 # kernel_is 2 6 8 returns false
364 # kernel_is 2 6 9 returns true
365 # @CODE
366
367 # Note: duplicated in kernel-2.eclass
368 kernel_is() {
369 # if we haven't determined the version yet, we need to.
370 linux-info_get_any_version
371
372 # Now we can continue
373 local operator test value
374
375 case ${1#-} in
376 lt) operator="-lt"; shift;;
377 gt) operator="-gt"; shift;;
378 le) operator="-le"; shift;;
379 ge) operator="-ge"; shift;;
380 eq) operator="-eq"; shift;;
381 *) operator="-eq";;
382 esac
383 [[ $# -gt 3 ]] && die "Error in kernel-2_kernel_is(): too many parameters"
384
385 : $(( test = (KV_MAJOR << 16) + (KV_MINOR << 8) + KV_PATCH ))
386 : $(( value = (${1:-${KV_MAJOR}} << 16) + (${2:-${KV_MINOR}} << 8) + ${3:-${KV_PATCH}} ))
387 [ ${test} ${operator} ${value} ]
388 }
389
390 get_localversion() {
391 local lv_list i x
392
393 # ignore files with ~ in it.
394 for i in $(ls ${1}/localversion* 2>/dev/null); do
395 [[ -n ${i//*~*} ]] && lv_list="${lv_list} ${i}"
396 done
397
398 for i in ${lv_list}; do
399 x="${x}$(<${i})"
400 done
401 x=${x/ /}
402 echo ${x}
403 }
404
405 # Check if the Makefile is valid for direct parsing.
406 # Check status results:
407 # - PASS, use 'getfilevar' to extract values
408 # - FAIL, use 'getfilevar_noexec' to extract values
409 # The check may fail if:
410 # - make is not present
411 # - corruption exists in the kernel makefile
412 get_makefile_extract_function() {
413 local a='' b='' mkfunc='getfilevar'
414 a="$(getfilevar VERSION ${KERNEL_MAKEFILE})"
415 b="$(getfilevar_noexec VERSION ${KERNEL_MAKEFILE})"
416 [[ "${a}" != "${b}" ]] && mkfunc='getfilevar_noexec'
417 echo "${mkfunc}"
418 }
419
420 # internal variable, so we know to only print the warning once
421 get_version_warning_done=
422
423 # @FUNCTION: get_version
424 # @DESCRIPTION:
425 # It gets the version of the kernel inside KERNEL_DIR and populates the KV_FULL variable
426 # (if KV_FULL is already set it does nothing).
427 #
428 # The kernel version variables (KV_MAJOR, KV_MINOR, KV_PATCH, KV_EXTRA and KV_LOCAL) are also set.
429 #
430 # The KV_DIR is set using the KERNEL_DIR env var, the KV_DIR_OUT is set using a valid
431 # KBUILD_OUTPUT (in a decreasing priority list, we look for the env var, makefile var or the
432 # symlink /lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build).
433 get_version() {
434 local kbuild_output mkfunc tmplocal
435
436 # no need to execute this twice assuming KV_FULL is populated.
437 # we can force by unsetting KV_FULL
438 [ -n "${KV_FULL}" ] && return 0
439
440 # if we dont know KV_FULL, then we need too.
441 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
442 unset KV_DIR
443
444 # KV_DIR will contain the full path to the sources directory we should use
445 [ -z "${get_version_warning_done}" ] && \
446 qeinfo "Determining the location of the kernel source code"
447 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
448 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
449
450 if [ -z "${KV_DIR}" ]
451 then
452 if [ -z "${get_version_warning_done}" ]; then
453 get_version_warning_done=1
454 qeerror "Unable to find kernel sources at ${KERNEL_DIR}"
455 #qeinfo "This package requires Linux sources."
456 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
457 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
458 qeinfo "(or the kernel you wish to build against)."
459 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
460 else
461 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
462 fi
463 fi
464 return 1
465 fi
466
467 if [ -z "${get_version_warning_done}" ]; then
468 qeinfo "Found kernel source directory:"
469 qeinfo " ${KV_DIR}"
470 fi
471
472 if [ ! -s "${KV_DIR}/Makefile" ]
473 then
474 if [ -z "${get_version_warning_done}" ]; then
475 get_version_warning_done=1
476 qeerror "Could not find a Makefile in the kernel source directory."
477 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
478 fi
479 return 1
480 fi
481
482 # OK so now we know our sources directory, but they might be using
483 # KBUILD_OUTPUT, and we need this for .config and localversions-*
484 # so we better find it eh?
485 # do we pass KBUILD_OUTPUT on the CLI?
486 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}"
487
488 # keep track of it
489 KERNEL_MAKEFILE="${KV_DIR}/Makefile"
490
491 # Decide the function used to extract makefile variables.
492 mkfunc="$(get_makefile_extract_function "${KERNEL_MAKEFILE}")"
493
494 # And if we didn't pass it, we can take a nosey in the Makefile
495 kbuild_output="$(${mkfunc} KBUILD_OUTPUT ${KERNEL_MAKEFILE})"
496 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
497
498 # And contrary to existing functions I feel we shouldn't trust the
499 # directory name to find version information as this seems insane.
500 # so we parse ${KERNEL_MAKEFILE}
501 KV_MAJOR="$(${mkfunc} VERSION ${KERNEL_MAKEFILE})"
502 KV_MINOR="$(${mkfunc} PATCHLEVEL ${KERNEL_MAKEFILE})"
503 KV_PATCH="$(${mkfunc} SUBLEVEL ${KERNEL_MAKEFILE})"
504 KV_EXTRA="$(${mkfunc} EXTRAVERSION ${KERNEL_MAKEFILE})"
505
506 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
507 then
508 if [ -z "${get_version_warning_done}" ]; then
509 get_version_warning_done=1
510 qeerror "Could not detect kernel version."
511 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
512 fi
513 return 1
514 fi
515
516 # and in newer versions we can also pull LOCALVERSION if it is set.
517 # but before we do this, we need to find if we use a different object directory.
518 # This *WILL* break if the user is using localversions, but we assume it was
519 # caught before this if they are.
520 OUTPUT_DIR="${OUTPUT_DIR:-/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build}"
521
522 [ -h "${OUTPUT_DIR}" ] && KV_OUT_DIR="$(readlink -f ${OUTPUT_DIR})"
523 [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
524 if [ -n "${KV_OUT_DIR}" ];
525 then
526 qeinfo "Found kernel object directory:"
527 qeinfo " ${KV_OUT_DIR}"
528 fi
529 # and if we STILL have not got it, then we better just set it to KV_DIR
530 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
531
532 # Grab the kernel release from the output directory.
533 # TODO: we MUST detect kernel.release being out of date, and 'return 1' from
534 # this function.
535 if [ -s "${KV_OUT_DIR}"/include/config/kernel.release ]; then
536 KV_LOCAL=$(<"${KV_OUT_DIR}"/include/config/kernel.release)
537 elif [ -s "${KV_OUT_DIR}"/.kernelrelease ]; then
538 KV_LOCAL=$(<"${KV_OUT_DIR}"/.kernelrelease)
539 else
540 KV_LOCAL=
541 fi
542
543 # KV_LOCAL currently contains the full release; discard the first bits.
544 tmplocal=${KV_LOCAL#${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}}
545
546 # If the updated local version was not changed, the tree is not prepared.
547 # Clear out KV_LOCAL in that case.
548 # TODO: this does not detect a change in the localversion part between
549 # kernel.release and the value that would be generated.
550 if [ "$KV_LOCAL" = "$tmplocal" ]; then
551 KV_LOCAL=
552 else
553 KV_LOCAL=$tmplocal
554 fi
555
556 # And we should set KV_FULL to the full expanded version
557 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
558
559 qeinfo "Found sources for kernel version:"
560 qeinfo " ${KV_FULL}"
561
562 return 0
563 }
564
565 # @FUNCTION: get_running_version
566 # @DESCRIPTION:
567 # It gets the version of the current running kernel and the result is the same as get_version() if the
568 # function can find the sources.
569 get_running_version() {
570 KV_FULL=$(uname -r)
571
572 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile && -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
573 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
574 KBUILD_OUTPUT=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
575 unset KV_FULL
576 get_version
577 return $?
578 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
579 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
580 unset KV_FULL
581 get_version
582 return $?
583 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
584 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
585 unset KV_FULL
586 get_version
587 return $?
588 else
589 # This handles a variety of weird kernel versions. Make sure to update
590 # tests/linux-info:get_running_version.sh if you want to change this.
591 local kv_full=${KV_FULL//[-+_]*}
592 KV_MAJOR=$(get_version_component_range 1 ${kv_full})
593 KV_MINOR=$(get_version_component_range 2 ${kv_full})
594 KV_PATCH=$(get_version_component_range 3 ${kv_full})
595 KV_EXTRA="${KV_FULL#${KV_MAJOR}.${KV_MINOR}${KV_PATCH:+.${KV_PATCH}}}"
596 : ${KV_PATCH:=0}
597 fi
598 return 0
599 }
600
601 # This next function is named with the eclass prefix to avoid conflicts with
602 # some old versionator-like eclass functions.
603
604 # @FUNCTION: linux-info_get_any_version
605 # @DESCRIPTION:
606 # This attempts to find the version of the sources, and otherwise falls back to
607 # the version of the running kernel.
608 linux-info_get_any_version() {
609 get_version
610 if [[ $? -ne 0 ]]; then
611 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
612 get_running_version
613 fi
614 }
615
616
617 # ebuild check functions
618 # ---------------------------------------
619
620 # @FUNCTION: check_kernel_built
621 # @DESCRIPTION:
622 # This function verifies that the current kernel sources have been already prepared otherwise it dies.
623 check_kernel_built() {
624 # if we haven't determined the version yet, we need to
625 require_configured_kernel
626 get_version
627
628 local versionh_path
629 if kernel_is -ge 3 7; then
630 versionh_path="include/generated/uapi/linux/version.h"
631 else
632 versionh_path="include/linux/version.h"
633 fi
634
635 if [ ! -f "${KV_OUT_DIR}/${versionh_path}" ]
636 then
637 eerror "These sources have not yet been prepared."
638 eerror "We cannot build against an unprepared tree."
639 eerror "To resolve this, please type the following:"
640 eerror
641 eerror "# cd ${KV_DIR}"
642 eerror "# make oldconfig"
643 eerror "# make modules_prepare"
644 eerror
645 eerror "Then please try merging this module again."
646 die "Kernel sources need compiling first"
647 fi
648 }
649
650 # @FUNCTION: check_modules_supported
651 # @DESCRIPTION:
652 # This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
653 check_modules_supported() {
654 # if we haven't determined the version yet, we need too.
655 require_configured_kernel
656 get_version
657
658 if ! linux_chkconfig_builtin "MODULES"; then
659 eerror "These sources do not support loading external modules."
660 eerror "to be able to use this module please enable \"Loadable modules support\""
661 eerror "in your kernel, recompile and then try merging this module again."
662 die "No support for external modules in ${KV_FULL} config"
663 fi
664 }
665
666 # @FUNCTION: check_extra_config
667 # @DESCRIPTION:
668 # It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
669 # the prefix ~ is not used) doesn't satisfy the directive.
670 check_extra_config() {
671 local config negate die error reworkmodulenames
672 local soft_errors_count=0 hard_errors_count=0 config_required=0
673 # store the value of the QA check, because otherwise we won't catch usages
674 # after if check_extra_config is called AND other direct calls are done
675 # later.
676 local old_LINUX_CONFIG_EXISTS_DONE="${_LINUX_CONFIG_EXISTS_DONE}"
677
678 # if we haven't determined the version yet, we need to
679 linux-info_get_any_version
680
681 # Determine if we really need a .config. The only time when we don't need
682 # one is when all of the CONFIG_CHECK options are prefixed with "~".
683 for config in ${CONFIG_CHECK}; do
684 if [[ "${config:0:1}" != "~" ]]; then
685 config_required=1
686 break
687 fi
688 done
689
690 if [[ ${config_required} == 0 ]]; then
691 # In the case where we don't require a .config, we can now bail out
692 # if the user has no .config as there is nothing to do. Otherwise
693 # code later will cause a failure due to missing .config.
694 if ! linux_config_exists; then
695 ewarn "Unable to check for the following kernel config options due"
696 ewarn "to absence of any configured kernel sources or compiled"
697 ewarn "config:"
698 for config in ${CONFIG_CHECK}; do
699 local_error="ERROR_${config#\~}"
700 msg="${!local_error}"
701 if [[ "x${msg}" == "x" ]]; then
702 local_error="WARNING_${config#\~}"
703 msg="${!local_error}"
704 fi
705 ewarn " - ${config#\~}${msg:+ - }${msg}"
706 done
707 ewarn "You're on your own to make sure they are set if needed."
708 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
709 return 0
710 fi
711 else
712 require_configured_kernel
713 fi
714
715 einfo "Checking for suitable kernel configuration options..."
716
717 for config in ${CONFIG_CHECK}
718 do
719 # if we specify any fatal, ensure we honor them
720 die=1
721 error=0
722 negate=0
723 reworkmodulenames=0
724
725 if [[ ${config:0:1} == "~" ]]; then
726 die=0
727 config=${config:1}
728 elif [[ ${config:0:1} == "@" ]]; then
729 die=0
730 reworkmodulenames=1
731 config=${config:1}
732 fi
733 if [[ ${config:0:1} == "!" ]]; then
734 negate=1
735 config=${config:1}
736 fi
737
738 if [[ ${negate} == 1 ]]; then
739 linux_chkconfig_present ${config} && error=2
740 elif [[ ${reworkmodulenames} == 1 ]]; then
741 local temp_config="${config//*:}" i n
742 config="${config//:*}"
743 if linux_chkconfig_present ${config}; then
744 for i in ${MODULE_NAMES}; do
745 n="${i//${temp_config}}"
746 [[ -z ${n//\(*} ]] && \
747 MODULE_IGNORE="${MODULE_IGNORE} ${temp_config}"
748 done
749 error=2
750 fi
751 else
752 linux_chkconfig_present ${config} || error=1
753 fi
754
755 if [[ ${error} > 0 ]]; then
756 local report_func="eerror" local_error
757 local_error="ERROR_${config}"
758 local_error="${!local_error}"
759
760 if [[ -z "${local_error}" ]]; then
761 # using old, deprecated format.
762 local_error="${config}_ERROR"
763 local_error="${!local_error}"
764 fi
765 if [[ ${die} == 0 && -z "${local_error}" ]]; then
766 #soft errors can be warnings
767 local_error="WARNING_${config}"
768 local_error="${!local_error}"
769 if [[ -n "${local_error}" ]] ; then
770 report_func="ewarn"
771 fi
772 fi
773
774 if [[ -z "${local_error}" ]]; then
775 [[ ${error} == 1 ]] \
776 && local_error="is not set when it should be." \
777 || local_error="should not be set. But it is."
778 local_error="CONFIG_${config}:\t ${local_error}"
779 fi
780 if [[ ${die} == 0 ]]; then
781 ${report_func} " ${local_error}"
782 soft_errors_count=$[soft_errors_count + 1]
783 else
784 ${report_func} " ${local_error}"
785 hard_errors_count=$[hard_errors_count + 1]
786 fi
787 fi
788 done
789
790 if [[ ${hard_errors_count} > 0 ]]; then
791 eerror "Please check to make sure these options are set correctly."
792 eerror "Failure to do so may cause unexpected problems."
793 eerror "Once you have satisfied these options, please try merging"
794 eerror "this package again."
795 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
796 die "Incorrect kernel configuration options"
797 elif [[ ${soft_errors_count} > 0 ]]; then
798 ewarn "Please check to make sure these options are set correctly."
799 ewarn "Failure to do so may cause unexpected problems."
800 else
801 eend 0
802 fi
803 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
804 }
805
806 check_zlibinflate() {
807 # if we haven't determined the version yet, we need to
808 require_configured_kernel
809 get_version
810
811 # although I restructured this code - I really really really dont support it!
812
813 # bug #27882 - zlib routines are only linked into the kernel
814 # if something compiled into the kernel calls them
815 #
816 # plus, for the cloop module, it appears that there's no way
817 # to get cloop.o to include a static zlib if CONFIG_MODVERSIONS
818 # is on
819
820 local INFLATE
821 local DEFLATE
822
823 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
824
825 ebegin "checking ZLIB_INFLATE"
826 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
827 eend $?
828 [ "$?" != 0 ] && die
829
830 ebegin "checking ZLIB_DEFLATE"
831 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
832 eend $?
833 [ "$?" != 0 ] && die
834
835 local LINENO_START
836 local LINENO_END
837 local SYMBOLS
838 local x
839
840 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
841 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
842 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
843 (( LINENO_END = $LINENO_END - 1 ))
844 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
845
846 # okay, now we have a list of symbols
847 # we need to check each one in turn, to see whether it is set or not
848 for x in $SYMBOLS ; do
849 if [ "${!x}" = "y" ]; then
850 # we have a winner!
851 einfo "${x} ensures zlib is linked into your kernel - excellent"
852 return 0
853 fi
854 done
855
856 eerror
857 eerror "This kernel module requires ZLIB library support."
858 eerror "You have enabled zlib support in your kernel, but haven't enabled"
859 eerror "enabled any option that will ensure that zlib is linked into your"
860 eerror "kernel."
861 eerror
862 eerror "Please ensure that you enable at least one of these options:"
863 eerror
864
865 for x in $SYMBOLS ; do
866 eerror " * $x"
867 done
868
869 eerror
870 eerror "Please remember to recompile and install your kernel, and reboot"
871 eerror "into your new kernel before attempting to load this kernel module."
872
873 die "Kernel doesn't include zlib support"
874 }
875
876 ################################
877 # Default pkg_setup
878 # Also used when inheriting linux-mod to force a get_version call
879 # @FUNCTION: linux-info_pkg_setup
880 # @DESCRIPTION:
881 # Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
882 # to support the options specified in CONFIG_CHECK (if not null)
883 linux-info_pkg_setup() {
884 linux-info_get_any_version
885
886 if kernel_is 2 4; then
887 if [ "$( gcc-major-version )" -eq "4" ] ; then
888 echo
889 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"
890 ewarn "linux-2.4 (or modules building against a linux-2.4 kernel)!"
891 echo
892 ewarn "Either switch to another gcc-version (via gcc-config) or use a"
893 ewarn "newer kernel that supports gcc-4."
894 echo
895 ewarn "Also be aware that bugreports about gcc-4 not working"
896 ewarn "with linux-2.4 based ebuilds will be closed as INVALID!"
897 echo
898 epause 10
899 fi
900 fi
901
902 [ -n "${CONFIG_CHECK}" ] && check_extra_config;
903 }

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