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Revision 1.62 - (show annotations) (download)
Sun Sep 6 22:54:58 2009 UTC (4 years, 10 months ago) by robbat2
Branch: MAIN
Changes since 1.61: +78 -17 lines
Bug #283320: Part of the migration work to make linux-info non-fatal. Currently gets enabled with I_KNOW_WHAT_I_AM_DOING in the env for the .config reading. Also uses the currently running version if no sources at all available.

1 # Copyright 1999-2006 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 1.61 2009/08/30 22:37:06 robbat2 Exp $
4 #
5 # Original author: John Mylchreest <johnm@gentoo.org>
6 # Maintainer: kernel-misc@gentoo.org
7 #
8 # Please direct your bugs to the current eclass maintainer :)
9
10 # @ECLASS: linux-info.eclass
11 # @MAINTAINER:
12 # kernel-misc@gentoo.org
13 # @BLURB: eclass used for accessing kernel related information
14 # @DESCRIPTION:
15 # This eclass is used as a central eclass for accessing kernel
16 # related information for source or binary already installed.
17 # It is vital for linux-mod.eclass to function correctly, and is split
18 # out so that any ebuild behaviour "templates" are abstracted out
19 # using additional eclasses.
20 #
21 # "kernel config" in this file means:
22 # The .config of the currently installed sources is used as the first
23 # preference, with a fall-back to bundled config (/proc/config.gz) if available.
24
25 # A Couple of env vars are available to effect usage of this eclass
26 # These are as follows:
27
28 # @ECLASS-VARIABLE: KERNEL_DIR
29 # @DESCRIPTION:
30 # A string containing the directory of the target kernel sources. The default value is
31 # "/usr/src/linux"
32
33 # @ECLASS-VARIABLE: CONFIG_CHECK
34 # @DESCRIPTION:
35 # A string containing a list of .config options to check for before
36 # proceeding with the install.
37 #
38 # e.g.: CONFIG_CHECK="MTRR"
39 #
40 # You can also check that an option doesn't exist by
41 # prepending it with an exclamation mark (!).
42 #
43 # e.g.: CONFIG_CHECK="!MTRR"
44 #
45 # To simply warn about a missing option, prepend a '~'.
46 # It may be combined with '!'.
47 #
48 # In general, most checks should be non-fatal. The only time fatal checks should
49 # be used is for building kernel modules or cases that a compile will fail
50 # without the option.
51 #
52 # This is to allow usage of binary kernels, and minimal systems without kernel
53 # sources.
54
55 # @ECLASS-VARIABLE: ERROR_<CFG>
56 # @DESCRIPTION:
57 # A string containing the error message to display when the check against CONFIG_CHECK
58 # fails. <CFG> should reference the appropriate option used in CONFIG_CHECK.
59 #
60 # e.g.: ERROR_MTRR="MTRR exists in the .config but shouldn't!!"
61
62 # @ECLASS-VARIABLE: KBUILD_OUTPUT
63 # @DESCRIPTION:
64 # A string passed on commandline, or set from the kernel makefile. It contains the directory
65 # which is to be used as the kernel object directory.
66
67 # There are also a couple of variables which are set by this, and shouldn't be
68 # set by hand. These are as follows:
69
70 # @ECLASS-VARIABLE: KV_FULL
71 # @DESCRIPTION:
72 # A read-only variable. It's a string containing the full kernel version. ie: 2.6.9-gentoo-johnm-r1
73
74 # @ECLASS-VARIABLE: KV_MAJOR
75 # @DESCRIPTION:
76 # A read-only variable. It's an integer containing the kernel major version. ie: 2
77
78 # @ECLASS-VARIABLE: KV_MINOR
79 # @DESCRIPTION:
80 # A read-only variable. It's an integer containing the kernel minor version. ie: 6
81
82 # @ECLASS-VARIABLE: KV_PATCH
83 # @DESCRIPTION:
84 # A read-only variable. It's an integer containing the kernel patch version. ie: 9
85
86 # @ECLASS-VARIABLE: KV_EXTRA
87 # @DESCRIPTION:
88 # A read-only variable. It's a string containing the kernel EXTRAVERSION. ie: -gentoo
89
90 # @ECLASS-VARIABLE: KV_LOCAL
91 # @DESCRIPTION:
92 # A read-only variable. It's a string containing the kernel LOCALVERSION concatenation. ie: -johnm
93
94 # @ECLASS-VARIABLE: KV_DIR
95 # @DESCRIPTION:
96 # A read-only variable. It's a string containing the kernel source directory, will be null if
97 # KERNEL_DIR is invalid.
98
99 # @ECLASS-VARIABLE: KV_OUT_DIR
100 # @DESCRIPTION:
101 # A read-only variable. It's a string containing the kernel object directory, will be KV_DIR unless
102 # KBUILD_OUTPUT is used. This should be used for referencing .config.
103
104 # @ECLASS-VARIABLE: I_KNOW_WHAT_I_AM_DOING
105 # @DESCRIPTION:
106 # Temporary variable for the migration to making linux-info non-fatal.
107
108 # And to ensure all the weirdness with crosscompile
109 inherit toolchain-funcs versionator
110
111 EXPORT_FUNCTIONS pkg_setup
112
113 DEPEND="kernel_linux? ( virtual/linux-sources )"
114 RDEPEND=""
115
116 # Overwritable environment Var's
117 # ---------------------------------------
118 KERNEL_DIR="${KERNEL_DIR:-${ROOT}usr/src/linux}"
119
120
121 # Bug fixes
122 # fix to bug #75034
123 case ${ARCH} in
124 ppc) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
125 ppc64) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
126 esac
127
128 # @FUNCTION: set_arch_to_kernel
129 # @DESCRIPTION:
130 # Set the env ARCH to match what the kernel expects.
131 set_arch_to_kernel() { export ARCH=$(tc-arch-kernel); }
132 # @FUNCTION: set_arch_to_portage
133 # @DESCRIPTION:
134 # Set the env ARCH to match what portage expects.
135 set_arch_to_portage() { export ARCH=$(tc-arch); }
136
137 # qeinfo "Message"
138 # -------------------
139 # qeinfo is a quiet einfo call when EBUILD_PHASE
140 # should not have visible output.
141 qout() {
142 local outputmsg type
143 type=${1}
144 shift
145 outputmsg="${@}"
146 case "${EBUILD_PHASE}" in
147 depend) unset outputmsg;;
148 clean) unset outputmsg;;
149 preinst) unset outputmsg;;
150 esac
151 [ -n "${outputmsg}" ] && ${type} "${outputmsg}"
152 }
153
154 qeinfo() { qout einfo "${@}" ; }
155 qeerror() { qout eerror "${@}" ; }
156
157 # File Functions
158 # ---------------------------------------
159
160 # @FUNCTION: getfilevar
161 # @USAGE: variable configfile
162 # @RETURN: the value of the variable
163 # @DESCRIPTION:
164 # It detects the value of the variable defined in the file configfile. This is
165 # done by including the configfile, and printing the variable with Make.
166 # It WILL break if your makefile has missing dependencies!
167 getfilevar() {
168 local ERROR basefname basedname myARCH="${ARCH}"
169 ERROR=0
170
171 [ -z "${1}" ] && ERROR=1
172 [ ! -f "${2}" ] && ERROR=1
173
174 if [ "${ERROR}" = 1 ]
175 then
176 echo -e "\n"
177 eerror "getfilevar requires 2 variables, with the second a valid file."
178 eerror " getfilevar <VARIABLE> <CONFIGFILE>"
179 else
180 basefname="$(basename ${2})"
181 basedname="$(dirname ${2})"
182 unset ARCH
183
184 echo -e "e:\\n\\t@echo \$(${1})\\ninclude ${basefname}" | \
185 make -C "${basedname}" M="${S}" ${BUILD_FIXES} -s -f - 2>/dev/null
186
187 ARCH=${myARCH}
188 fi
189 }
190
191 # @FUNCTION: getfilevar_noexec
192 # @USAGE: variable configfile
193 # @RETURN: the value of the variable
194 # @DESCRIPTION:
195 # It detects the value of the variable defined in the file configfile.
196 # This is done with sed matching an expression only. If the variable is defined,
197 # you will run into problems. See getfilevar for those cases.
198 getfilevar_noexec() {
199 local ERROR basefname basedname mycat myARCH="${ARCH}"
200 ERROR=0
201 mycat='cat'
202
203 [ -z "${1}" ] && ERROR=1
204 [ ! -f "${2}" ] && ERROR=1
205 [ "${2#.gz}" != "${2}" ] && mycat='zcat'
206
207 if [ "${ERROR}" = 1 ]
208 then
209 echo -e "\n"
210 eerror "getfilevar_noexec requires 2 variables, with the second a valid file."
211 eerror " getfilevar_noexec <VARIABLE> <CONFIGFILE>"
212 else
213 ${mycat} "${2}" | \
214 sed -n \
215 -e "/^[[:space:]]*${1}[[:space:]]*=[[:space:]]*\(.*\)\$/{
216 s,^[^=]*[[:space:]]*=[[:space:]]*,,g ;
217 s,[[:space:]]*\$,,g ;
218 p
219 }"
220 fi
221 }
222
223
224 # @FUNCTION: linux_config_src_exists
225 # @RETURN: true or false
226 # @DESCRIPTION:
227 # It returns true if .config exists in a build directory otherwise false
228 linux_config_src_exists() {
229 [ -s "${KV_OUT_DIR}/.config" ]
230 }
231
232 # @FUNCTION: linux_config_bin_exists
233 # @RETURN: true or false
234 # @DESCRIPTION:
235 # It returns true if .config exists in /proc, otherwise false
236 linux_config_bin_exists() {
237 [ -s "/proc/config.gz" ]
238 }
239
240 # @FUNCTION: linux_config_exists
241 # @RETURN: true or false
242 # @DESCRIPTION:
243 # It returns true if .config exists otherwise false
244 #
245 # This function MUST be checked before using any of the linux_chkconfig_*
246 # functions.
247 linux_config_exists() {
248 linux_config_src_exists || linux_config_bin_exists
249 }
250
251 # @FUNCTION: require_configured_kernel
252 # @DESCRIPTION:
253 # This function verifies that the current kernel is configured (it checks against the existence of .config)
254 # otherwise it dies.
255 require_configured_kernel() {
256 if ! linux_config_src_exists; then
257 qeerror "Could not find a usable .config in the kernel source directory."
258 qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources."
259 qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that"
260 qeerror "it points to the necessary object directory so that it might find .config."
261 die "Kernel not configured; no .config found in ${KV_OUT_DIR}"
262 fi
263 }
264
265 # @FUNCTION: linux_chkconfig_present
266 # @USAGE: option
267 # @RETURN: true or false
268 # @DESCRIPTION:
269 # It checks that CONFIG_<option>=y or CONFIG_<option>=m is present in the current kernel .config
270 # If linux_config_exists returns false, the results of this are UNDEFINED. You
271 # MUST call linux_config_exists first.
272 linux_chkconfig_present() {
273 local RESULT
274 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
275 local config
276 config="${KV_OUT_DIR}/.config"
277 [ ! -f "${config}" ] && config="/proc/config.gz"
278 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
279 [ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1
280 }
281
282 # @FUNCTION: linux_chkconfig_module
283 # @USAGE: option
284 # @RETURN: true or false
285 # @DESCRIPTION:
286 # It checks that CONFIG_<option>=m is present in the current kernel .config
287 # If linux_config_exists returns false, the results of this are UNDEFINED. You
288 # MUST call linux_config_exists first.
289 linux_chkconfig_module() {
290 local RESULT
291 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
292 local config
293 config="${KV_OUT_DIR}/.config"
294 [ ! -f "${config}" ] && config="/proc/config.gz"
295 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
296 [ "${RESULT}" = "m" ] && return 0 || return 1
297 }
298
299 # @FUNCTION: linux_chkconfig_builtin
300 # @USAGE: option
301 # @RETURN: true or false
302 # @DESCRIPTION:
303 # It checks that CONFIG_<option>=y is present in the current kernel .config
304 # If linux_config_exists returns false, the results of this are UNDEFINED. You
305 # MUST call linux_config_exists first.
306 linux_chkconfig_builtin() {
307 local RESULT
308 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
309 local config
310 config="${KV_OUT_DIR}/.config"
311 [ ! -f "${config}" ] && config="/proc/config.gz"
312 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
313 [ "${RESULT}" = "y" ] && return 0 || return 1
314 }
315
316 # @FUNCTION: linux_chkconfig_string
317 # @USAGE: option
318 # @RETURN: CONFIG_<option>
319 # @DESCRIPTION:
320 # It prints the CONFIG_<option> value of the current kernel .config (it requires a configured kernel).
321 # If linux_config_exists returns false, the results of this are UNDEFINED. You
322 # MUST call linux_config_exists first.
323 linux_chkconfig_string() {
324 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
325 local config
326 config="${KV_OUT_DIR}/.config"
327 [ ! -f "${config}" ] && config="/proc/config.gz"
328 getfilevar_noexec "CONFIG_${1}" "${config}"
329 }
330
331 # Versioning Functions
332 # ---------------------------------------
333
334 # @FUNCTION: kernel_is
335 # @USAGE: [-lt -gt -le -ge -eq] major_number [minor_number patch_number]
336 # @RETURN: true or false
337 # @DESCRIPTION:
338 # It returns true when the current kernel version satisfies the comparison against the passed version.
339 # -eq is the default comparison.
340 #
341 # @CODE
342 # For Example where KV = 2.6.9
343 # kernel_is 2 4 returns false
344 # kernel_is 2 returns true
345 # kernel_is 2 6 returns true
346 # kernel_is 2 6 8 returns false
347 # kernel_is 2 6 9 returns true
348 # @CODE
349
350 # got the jist yet?
351
352 kernel_is() {
353 # if we haven't determined the version yet, we need to.
354 get_version
355 local operator test value x=0 y=0 z=0
356
357 case ${1} in
358 lt) operator="-lt"; shift;;
359 gt) operator="-gt"; shift;;
360 le) operator="-le"; shift;;
361 ge) operator="-ge"; shift;;
362 eq) operator="-eq"; shift;;
363 *) operator="-eq";;
364 esac
365
366 for x in ${@}; do
367 for((y=0; y<$((3 - ${#x})); y++)); do value="${value}0"; done
368 value="${value}${x}"
369 z=$((${z} + 1))
370
371 case ${z} in
372 1) for((y=0; y<$((3 - ${#KV_MAJOR})); y++)); do test="${test}0"; done;
373 test="${test}${KV_MAJOR}";;
374 2) for((y=0; y<$((3 - ${#KV_MINOR})); y++)); do test="${test}0"; done;
375 test="${test}${KV_MINOR}";;
376 3) for((y=0; y<$((3 - ${#KV_PATCH})); y++)); do test="${test}0"; done;
377 test="${test}${KV_PATCH}";;
378 *) die "Error in kernel-2_kernel_is(): Too many parameters.";;
379 esac
380 done
381
382 [ ${test} ${operator} ${value} ] && return 0 || return 1
383 }
384
385 get_localversion() {
386 local lv_list i x
387
388 # ignore files with ~ in it.
389 for i in $(ls ${1}/localversion* 2>/dev/null); do
390 [[ -n ${i//*~*} ]] && lv_list="${lv_list} ${i}"
391 done
392
393 for i in ${lv_list}; do
394 x="${x}$(<${i})"
395 done
396 x=${x/ /}
397 echo ${x}
398 }
399
400 # @FUNCTION: get_version
401 # @DESCRIPTION:
402 # It gets the version of the kernel inside KERNEL_DIR and populates the KV_FULL variable
403 # (if KV_FULL is already set it does nothing).
404 #
405 # The kernel version variables (KV_MAJOR, KV_MINOR, KV_PATCH, KV_EXTRA and KV_LOCAL) are also set.
406 #
407 # The KV_DIR is set using the KERNEL_DIR env var, the KV_DIR_OUT is set using a valid
408 # KBUILD_OUTPUT (in a decreasing priority list, we look for the env var, makefile var or the
409 # symlink /lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build).
410 get_version() {
411 local kbuild_output
412
413 # no need to execute this twice assuming KV_FULL is populated.
414 # we can force by unsetting KV_FULL
415 [ -n "${KV_FULL}" ] && return 0
416
417 # if we dont know KV_FULL, then we need too.
418 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
419 unset KV_DIR
420
421 # KV_DIR will contain the full path to the sources directory we should use
422 qeinfo "Determining the location of the kernel source code"
423 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
424 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
425
426 if [ -z "${KV_DIR}" ]
427 then
428 qeerror "Unable to find kernel sources at ${KERNEL_DIR}"
429 qeinfo "This package requires Linux sources."
430 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
431 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
432 qeinfo "(or the kernel you wish to build against)."
433 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
434 else
435 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
436 fi
437 return 1
438 fi
439
440 qeinfo "Found kernel source directory:"
441 qeinfo " ${KV_DIR}"
442
443 if [ ! -s "${KV_DIR}/Makefile" ]
444 then
445 qeerror "Could not find a Makefile in the kernel source directory."
446 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
447 return 1
448 fi
449
450 # OK so now we know our sources directory, but they might be using
451 # KBUILD_OUTPUT, and we need this for .config and localversions-*
452 # so we better find it eh?
453 # do we pass KBUILD_OUTPUT on the CLI?
454 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}"
455
456 # And if we didn't pass it, we can take a nosey in the Makefile
457 kbuild_output="$(getfilevar_noexec KBUILD_OUTPUT ${KV_DIR}/Makefile)"
458 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
459
460 # And contrary to existing functions I feel we shouldn't trust the
461 # directory name to find version information as this seems insane.
462 # so we parse ${KV_DIR}/Makefile
463 KV_MAJOR="$(getfilevar_noexec VERSION ${KV_DIR}/Makefile)"
464 KV_MINOR="$(getfilevar_noexec PATCHLEVEL ${KV_DIR}/Makefile)"
465 KV_PATCH="$(getfilevar_noexec SUBLEVEL ${KV_DIR}/Makefile)"
466 KV_EXTRA="$(getfilevar_noexec EXTRAVERSION ${KV_DIR}/Makefile)"
467
468 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
469 then
470 qeerror "Could not detect kernel version."
471 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
472 return 1
473 fi
474
475 # and in newer versions we can also pull LOCALVERSION if it is set.
476 # but before we do this, we need to find if we use a different object directory.
477 # This *WILL* break if the user is using localversions, but we assume it was
478 # caught before this if they are.
479 [ "${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}" == "$(uname -r)" ] && \
480 OUTPUT_DIR="${OUTPUT_DIR:-/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build}"
481
482 [ -h "${OUTPUT_DIR}" ] && KV_OUT_DIR="$(readlink -f ${OUTPUT_DIR})"
483 [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
484 if [ -n "${KV_OUT_DIR}" ];
485 then
486 qeinfo "Found kernel object directory:"
487 qeinfo " ${KV_OUT_DIR}"
488
489 KV_LOCAL="$(get_localversion ${KV_OUT_DIR})"
490 fi
491 # and if we STILL have not got it, then we better just set it to KV_DIR
492 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
493
494 KV_LOCAL="${KV_LOCAL}$(get_localversion ${KV_DIR})"
495 if linux_config_exists; then
496 KV_LOCAL="${KV_LOCAL}$(linux_chkconfig_string LOCALVERSION)"
497 KV_LOCAL="${KV_LOCAL//\"/}"
498
499 # For things like git that can append extra stuff:
500 [ -e ${KV_DIR}/scripts/setlocalversion ] &&
501 linux_chkconfig_builtin LOCALVERSION_AUTO &&
502 KV_LOCAL="${KV_LOCAL}$(sh ${KV_DIR}/scripts/setlocalversion ${KV_DIR})"
503 fi
504
505 # And we should set KV_FULL to the full expanded version
506 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
507
508 qeinfo "Found sources for kernel version:"
509 qeinfo " ${KV_FULL}"
510
511 return 0
512 }
513
514 # @FUNCTION: get_running_version
515 # @DESCRIPTION:
516 # It gets the version of the current running kernel and the result is the same as get_version() if the
517 # function can find the sources.
518 get_running_version() {
519 KV_FULL=$(uname -r)
520
521 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
522 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
523 unset KV_FULL
524 get_version
525 return $?
526 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
527 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
528 unset KV_FULL
529 get_version
530 return $?
531 else
532 KV_MAJOR=$(get_version_component_range 1 ${KV_FULL})
533 KV_MINOR=$(get_version_component_range 2 ${KV_FULL})
534 KV_PATCH=$(get_version_component_range 3- ${KV_FULL})
535 KV_PATCH=${KV_PATCH//-*}
536 [[ -n ${KV_FULL#*-} ]] && [[ -n ${KV_FULL//${KV_FULL#*-}} ]] \
537 && KV_EXTRA="-${KV_FULL#*-}"
538 fi
539 return 0
540 }
541
542
543 # ebuild check functions
544 # ---------------------------------------
545
546 # @FUNCTION: check_kernel_built
547 # @DESCRIPTION:
548 # This function verifies that the current kernel sources have been already prepared otherwise it dies.
549 check_kernel_built() {
550 # if we haven't determined the version yet, we need to
551 require_configured_kernel
552 get_version
553
554 if [ ! -f "${KV_OUT_DIR}/include/linux/version.h" ]
555 then
556 eerror "These sources have not yet been prepared."
557 eerror "We cannot build against an unprepared tree."
558 eerror "To resolve this, please type the following:"
559 eerror
560 eerror "# cd ${KV_DIR}"
561 eerror "# make oldconfig"
562 eerror "# make modules_prepare"
563 eerror
564 eerror "Then please try merging this module again."
565 die "Kernel sources need compiling first"
566 fi
567 }
568
569 # @FUNCTION: check_modules_supported
570 # @DESCRIPTION:
571 # This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
572 check_modules_supported() {
573 # if we haven't determined the version yet, we need too.
574 require_configured_kernel
575 get_version
576
577 if ! linux_chkconfig_builtin "MODULES"
578 then
579 eerror "These sources do not support loading external modules."
580 eerror "to be able to use this module please enable \"Loadable modules support\""
581 eerror "in your kernel, recompile and then try merging this module again."
582 die "No support for external modules in ${KV_FULL} config"
583 fi
584 }
585
586 # @FUNCTION: check_extra_config
587 # @DESCRIPTION:
588 # It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
589 # the prefix ~ is not used) doesn't satisfy the directive.
590 check_extra_config() {
591 local config negate die error reworkmodulenames
592 local soft_errors_count=0 hard_errors_count=0 config_required=0
593
594 # if we haven't determined the version yet, we need to
595 get_version
596
597 # Determine if we really need a .config. The only time when we don't need
598 # one is when all of the CONFIG_CHECK options are prefixed with "~".
599 for config in ${CONFIG_CHECK}
600 do
601 if [[ "${config:0:1}" != "~" ]]; then
602 config_required=1
603 break
604 fi
605 done
606
607 if [[ ${config_required} == 0 ]]; then
608 # In the case where we don't require a .config, we can now bail out
609 # if the user has no .config as there is nothing to do. Otherwise
610 # code later will cause a failure due to missing .config.
611 if ! linux_config_exists; then
612 ewarn "Unable to check for the following kernel config options due"
613 ewarn "to absence of any configured kernel sources:"
614 for config in ${CONFIG_CHECK}; do
615 ewarn " - ${config#\~}"
616 done
617 ewarn "You're on your own to make sure they are set if needed."
618 return 0
619 fi
620 else
621 require_configured_kernel
622 fi
623
624 einfo "Checking for suitable kernel configuration options..."
625
626 for config in ${CONFIG_CHECK}
627 do
628 # if we specify any fatal, ensure we honor them
629 die=1
630 error=0
631 negate=0
632 reworkmodulenames=0
633
634 if [[ ${config:0:1} == "~" ]]; then
635 die=0
636 config=${config:1}
637 elif [[ ${config:0:1} == "@" ]]; then
638 die=0
639 reworkmodulenames=1
640 config=${config:1}
641 fi
642 if [[ ${config:0:1} == "!" ]]; then
643 negate=1
644 config=${config:1}
645 fi
646
647 if [[ ${negate} == 1 ]]; then
648 linux_chkconfig_present ${config} && error=2
649 elif [[ ${reworkmodulenames} == 1 ]]; then
650 local temp_config="${config//*:}" i n
651 config="${config//:*}"
652 if linux_chkconfig_present ${config}; then
653 for i in ${MODULE_NAMES}; do
654 n="${i//${temp_config}}"
655 [[ -z ${n//\(*} ]] && \
656 MODULE_IGNORE="${MODULE_IGNORE} ${temp_config}"
657 done
658 error=2
659 fi
660 else
661 linux_chkconfig_present ${config} || error=1
662 fi
663
664 if [[ ${error} > 0 ]]; then
665 local report_func="eerror" local_error
666 local_error="ERROR_${config}"
667 local_error="${!local_error}"
668
669 if [[ -z "${local_error}" ]]; then
670 # using old, deprecated format.
671 local_error="${config}_ERROR"
672 local_error="${!local_error}"
673 fi
674 if [[ ${die} == 0 && -z "${local_error}" ]]; then
675 #soft errors can be warnings
676 local_error="WARNING_${config}"
677 local_error="${!local_error}"
678 if [[ -n "${local_error}" ]] ; then
679 report_func="ewarn"
680 fi
681 fi
682
683 if [[ -z "${local_error}" ]]; then
684 [[ ${error} == 1 ]] \
685 && local_error="is not set when it should be." \
686 || local_error="should not be set. But it is."
687 local_error="CONFIG_${config}:\t ${local_error}"
688 fi
689 if [[ ${die} == 0 ]]; then
690 ${report_func} " ${local_error}"
691 soft_errors_count=$[soft_errors_count + 1]
692 else
693 ${report_func} " ${local_error}"
694 hard_errors_count=$[hard_errors_count + 1]
695 fi
696 fi
697 done
698
699 if [[ ${hard_errors_count} > 0 ]]; then
700 eerror "Please check to make sure these options are set correctly."
701 eerror "Failure to do so may cause unexpected problems."
702 eerror "Once you have satisfied these options, please try merging"
703 eerror "this package again."
704 die "Incorrect kernel configuration options"
705 elif [[ ${soft_errors_count} > 0 ]]; then
706 ewarn "Please check to make sure these options are set correctly."
707 ewarn "Failure to do so may cause unexpected problems."
708 else
709 eend 0
710 fi
711 }
712
713 check_zlibinflate() {
714 # if we haven't determined the version yet, we need to
715 require_configured_kernel
716 get_version
717
718 # although I restructured this code - I really really really dont support it!
719
720 # bug #27882 - zlib routines are only linked into the kernel
721 # if something compiled into the kernel calls them
722 #
723 # plus, for the cloop module, it appears that there's no way
724 # to get cloop.o to include a static zlib if CONFIG_MODVERSIONS
725 # is on
726
727 local INFLATE
728 local DEFLATE
729
730 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
731
732 ebegin "checking ZLIB_INFLATE"
733 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
734 eend $?
735 [ "$?" != 0 ] && die
736
737 ebegin "checking ZLIB_DEFLATE"
738 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
739 eend $?
740 [ "$?" != 0 ] && die
741
742 local LINENO_START
743 local LINENO_END
744 local SYMBOLS
745 local x
746
747 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
748 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
749 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
750 (( LINENO_END = $LINENO_END - 1 ))
751 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
752
753 # okay, now we have a list of symbols
754 # we need to check each one in turn, to see whether it is set or not
755 for x in $SYMBOLS ; do
756 if [ "${!x}" = "y" ]; then
757 # we have a winner!
758 einfo "${x} ensures zlib is linked into your kernel - excellent"
759 return 0
760 fi
761 done
762
763 eerror
764 eerror "This kernel module requires ZLIB library support."
765 eerror "You have enabled zlib support in your kernel, but haven't enabled"
766 eerror "enabled any option that will ensure that zlib is linked into your"
767 eerror "kernel."
768 eerror
769 eerror "Please ensure that you enable at least one of these options:"
770 eerror
771
772 for x in $SYMBOLS ; do
773 eerror " * $x"
774 done
775
776 eerror
777 eerror "Please remember to recompile and install your kernel, and reboot"
778 eerror "into your new kernel before attempting to load this kernel module."
779
780 die "Kernel doesn't include zlib support"
781 }
782
783 ################################
784 # Default pkg_setup
785 # Also used when inheriting linux-mod to force a get_version call
786 # @FUNCTION: linux-info_pkg_setup
787 # @DESCRIPTION:
788 # Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
789 # to support the options specified in CONFIG_CHECK (if not null)
790 linux-info_pkg_setup() {
791 get_version
792 if [[ $rc -ne 0 ]]; then
793 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
794 get_running_version
795 fi
796
797 if kernel_is 2 4; then
798 if [ "$( gcc-major-version )" -eq "4" ] ; then
799 echo
800 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"
801 ewarn "linux-2.4 (or modules building against a linux-2.4 kernel)!"
802 echo
803 ewarn "Either switch to another gcc-version (via gcc-config) or use a"
804 ewarn "newer kernel that supports gcc-4."
805 echo
806 ewarn "Also be aware that bugreports about gcc-4 not working"
807 ewarn "with linux-2.4 based ebuilds will be closed as INVALID!"
808 echo
809 epause 10
810 fi
811 fi
812
813 [ -n "${CONFIG_CHECK}" ] && check_extra_config;
814 }

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