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Revision 1.56 - (show annotations) (download)
Fri Oct 31 22:01:32 2008 UTC (5 years, 10 months ago) by dsd
Branch: MAIN
Changes since 1.55: +151 -47 lines
Add documentation from Fabio Rossi in bug #217562

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 1.55 2008/03/21 11:11:27 dsd 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 sources 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 # A Couple of env vars are available to effect usage of this eclass
22 # These are as follows:
23
24 # @ECLASS-VARIABLE: KERNEL_DIR
25 # @DESCRIPTION:
26 # A string containing the directory of the target kernel sources. The default value is
27 # "/usr/src/linux"
28
29 # @ECLASS-VARIABLE: CONFIG_CHECK
30 # @DESCRIPTION:
31 # A string containing a list of .config options to check for before
32 # proceeding with the install.
33 #
34 # e.g.: CONFIG_CHECK="MTRR"
35 #
36 # You can also check that an option doesn't exist by
37 # prepending it with an exclamation mark (!).
38 #
39 # e.g.: CONFIG_CHECK="!MTRR"
40 #
41 # To simply warn about a missing option, prepend a '~'.
42
43 # @ECLASS-VARIABLE: ERROR_<CFG>
44 # @DESCRIPTION:
45 # A string containing the error message to display when the check against CONFIG_CHECK
46 # fails. <CFG> should reference the appropriate option used in CONFIG_CHECK.
47 #
48 # e.g.: ERROR_MTRR="MTRR exists in the .config but shouldn't!!"
49
50 # @ECLASS-VARIABLE: KBUILD_OUTPUT
51 # @DESCRIPTION:
52 # A string passed on commandline, or set from the kernel makefile. It contains the directory
53 # which is to be used as the kernel object directory.
54
55 # There are also a couple of variables which are set by this, and shouldn't be
56 # set by hand. These are as follows:
57
58 # @ECLASS-VARIABLE: KV_FULL
59 # @DESCRIPTION:
60 # A read-only variable. It's a string containing the full kernel version. ie: 2.6.9-gentoo-johnm-r1
61
62 # @ECLASS-VARIABLE: KV_MAJOR
63 # @DESCRIPTION:
64 # A read-only variable. It's an integer containing the kernel major version. ie: 2
65
66 # @ECLASS-VARIABLE: KV_MINOR
67 # @DESCRIPTION:
68 # A read-only variable. It's an integer containing the kernel minor version. ie: 6
69
70 # @ECLASS-VARIABLE: KV_PATCH
71 # @DESCRIPTION:
72 # A read-only variable. It's an integer containing the kernel patch version. ie: 9
73
74 # @ECLASS-VARIABLE: KV_EXTRA
75 # @DESCRIPTION:
76 # A read-only variable. It's a string containing the kernel EXTRAVERSION. ie: -gentoo
77
78 # @ECLASS-VARIABLE: KV_LOCAL
79 # @DESCRIPTION:
80 # A read-only variable. It's a string containing the kernel LOCALVERSION concatenation. ie: -johnm
81
82 # @ECLASS-VARIABLE: KV_DIR
83 # @DESCRIPTION:
84 # A read-only variable. It's a string containing the kernel source directory, will be null if
85 # KERNEL_DIR is invalid.
86
87 # @ECLASS-VARIABLE: KV_OUT_DIR
88 # @DESCRIPTION:
89 # A read-only variable. It's a string containing the kernel object directory, will be KV_DIR unless
90 # KBUILD_OUTPUT is used. This should be used for referencing .config.
91
92 # And to ensure all the weirdness with crosscompile
93 inherit toolchain-funcs versionator
94
95 EXPORT_FUNCTIONS pkg_setup
96
97 DEPEND="kernel_linux? ( virtual/linux-sources )"
98 RDEPEND=""
99
100 # Overwritable environment Var's
101 # ---------------------------------------
102 KERNEL_DIR="${KERNEL_DIR:-${ROOT}usr/src/linux}"
103
104
105 # Bug fixes
106 # fix to bug #75034
107 case ${ARCH} in
108 ppc) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
109 ppc64) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
110 esac
111
112 # @FUNCTION: set_arch_to_kernel
113 # @DESCRIPTION:
114 # Set the env ARCH to match what the kernel expects.
115 set_arch_to_kernel() { export ARCH=$(tc-arch-kernel); }
116 # @FUNCTION: set_arch_to_portage
117 # @DESCRIPTION:
118 # Set the env ARCH to match what portage expects.
119 set_arch_to_portage() { export ARCH=$(tc-arch); }
120
121 # qeinfo "Message"
122 # -------------------
123 # qeinfo is a quiet einfo call when EBUILD_PHASE
124 # should not have visible output.
125 qout() {
126 local outputmsg type
127 type=${1}
128 shift
129 outputmsg="${@}"
130 case "${EBUILD_PHASE}" in
131 depend) unset outputmsg;;
132 clean) unset outputmsg;;
133 preinst) unset outputmsg;;
134 esac
135 [ -n "${outputmsg}" ] && ${type} "${outputmsg}"
136 }
137
138 qeinfo() { qout einfo "${@}" ; }
139 qeerror() { qout eerror "${@}" ; }
140
141 # File Functions
142 # ---------------------------------------
143
144 # @FUNCTION: getfilevar
145 # @USAGE: variable configfile
146 # @RETURN: the value of the variable
147 # @DESCRIPTION:
148 # It detects the value of the variable defined in the file configfile
149 getfilevar() {
150 local ERROR workingdir basefname basedname myARCH="${ARCH}"
151 ERROR=0
152
153 [ -z "${1}" ] && ERROR=1
154 [ ! -f "${2}" ] && ERROR=1
155
156 if [ "${ERROR}" = 1 ]
157 then
158 echo -e "\n"
159 eerror "getfilevar requires 2 variables, with the second a valid file."
160 eerror " getfilevar <VARIABLE> <CONFIGFILE>"
161 else
162 workingdir="${PWD}"
163 basefname="$(basename ${2})"
164 basedname="$(dirname ${2})"
165 unset ARCH
166
167 cd "${basedname}"
168 echo -e "e:\\n\\t@echo \$(${1})\\ninclude ${basefname}" | \
169 make M="${S}" ${BUILD_FIXES} -s -f - 2>/dev/null
170 cd "${workingdir}"
171
172 ARCH=${myARCH}
173 fi
174 }
175
176
177 # @FUNCTION: linux_config_exists
178 # @RETURN: true or false
179 # @DESCRIPTION:
180 # It returns true if .config exists otherwise false
181 linux_config_exists() {
182 [ -s "${KV_OUT_DIR}/.config" ]
183 }
184
185 # @FUNCTION: require_configured_kernel
186 # @DESCRIPTION:
187 # This function verifies that the current kernel is configured (it checks against the existence of .config)
188 # otherwise it dies.
189 require_configured_kernel() {
190 if ! linux_config_exists; then
191 qeerror "Could not find a usable .config in the kernel source directory."
192 qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources."
193 qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that"
194 qeerror "it points to the necessary object directory so that it might find .config."
195 die "Kernel not configured; no .config found in ${KV_OUT_DIR}"
196 fi
197 }
198
199 # @FUNCTION: linux_chkconfig_present
200 # @USAGE: option
201 # @RETURN: true or false
202 # @DESCRIPTION:
203 # It checks that CONFIG_<option>=y or CONFIG_<option>=n is present in the current kernel .config
204 linux_chkconfig_present() {
205 local RESULT
206 require_configured_kernel
207 RESULT="$(getfilevar CONFIG_${1} ${KV_OUT_DIR}/.config)"
208 [ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1
209 }
210
211 # @FUNCTION: linux_chkconfig_module
212 # @USAGE: option
213 # @RETURN: true or false
214 # @DESCRIPTION:
215 # It checks that CONFIG_<option>=m is present in the current kernel .config
216 linux_chkconfig_module() {
217 local RESULT
218 require_configured_kernel
219 RESULT="$(getfilevar CONFIG_${1} ${KV_OUT_DIR}/.config)"
220 [ "${RESULT}" = "m" ] && return 0 || return 1
221 }
222
223 # @FUNCTION: linux_chkconfig_builtin
224 # @USAGE: option
225 # @RETURN: true or false
226 # @DESCRIPTION:
227 # It checks that CONFIG_<option>=y is present in the current kernel .config
228 linux_chkconfig_builtin() {
229 local RESULT
230 require_configured_kernel
231 RESULT="$(getfilevar CONFIG_${1} ${KV_OUT_DIR}/.config)"
232 [ "${RESULT}" = "y" ] && return 0 || return 1
233 }
234
235 # @FUNCTION: linux_chkconfig_string
236 # @USAGE: option
237 # @RETURN: CONFIG_<option>
238 # @DESCRIPTION:
239 # It prints the CONFIG_<option> value of the current kernel .config (it requires a configured kernel).
240 linux_chkconfig_string() {
241 require_configured_kernel
242 getfilevar "CONFIG_${1}" "${KV_OUT_DIR}/.config"
243 }
244
245 # Versioning Functions
246 # ---------------------------------------
247
248 # @FUNCTION: kernel_is
249 # @USAGE: [-lt -gt -le -ge -eq] major_number [minor_number patch_number]
250 # @RETURN: true or false
251 # @DESCRIPTION:
252 # It returns true when the current kernel version satisfies the comparison against the passed version.
253 # -eq is the default comparison.
254 #
255 # @CODE
256 # For Example where KV = 2.6.9
257 # kernel_is 2 4 returns false
258 # kernel_is 2 returns true
259 # kernel_is 2 6 returns true
260 # kernel_is 2 6 8 returns false
261 # kernel_is 2 6 9 returns true
262 # @CODE
263
264 # got the jist yet?
265
266 kernel_is() {
267 # if we haven't determined the version yet, we need to.
268 get_version
269 local operator test value x=0 y=0 z=0
270
271 case ${1} in
272 lt) operator="-lt"; shift;;
273 gt) operator="-gt"; shift;;
274 le) operator="-le"; shift;;
275 ge) operator="-ge"; shift;;
276 eq) operator="-eq"; shift;;
277 *) operator="-eq";;
278 esac
279
280 for x in ${@}; do
281 for((y=0; y<$((3 - ${#x})); y++)); do value="${value}0"; done
282 value="${value}${x}"
283 z=$((${z} + 1))
284
285 case ${z} in
286 1) for((y=0; y<$((3 - ${#KV_MAJOR})); y++)); do test="${test}0"; done;
287 test="${test}${KV_MAJOR}";;
288 2) for((y=0; y<$((3 - ${#KV_MINOR})); y++)); do test="${test}0"; done;
289 test="${test}${KV_MINOR}";;
290 3) for((y=0; y<$((3 - ${#KV_PATCH})); y++)); do test="${test}0"; done;
291 test="${test}${KV_PATCH}";;
292 *) die "Error in kernel-2_kernel_is(): Too many parameters.";;
293 esac
294 done
295
296 [ ${test} ${operator} ${value} ] && return 0 || return 1
297 }
298
299 get_localversion() {
300 local lv_list i x
301
302 # ignore files with ~ in it.
303 for i in $(ls ${1}/localversion* 2>/dev/null); do
304 [[ -n ${i//*~*} ]] && lv_list="${lv_list} ${i}"
305 done
306
307 for i in ${lv_list}; do
308 x="${x}$(<${i})"
309 done
310 x=${x/ /}
311 echo ${x}
312 }
313
314 # @FUNCTION: get_version
315 # @DESCRIPTION:
316 # It gets the version of the kernel inside KERNEL_DIR and populates the KV_FULL variable
317 # (if KV_FULL is already set it does nothing).
318 #
319 # The kernel version variables (KV_MAJOR, KV_MINOR, KV_PATCH, KV_EXTRA and KV_LOCAL) are also set.
320 #
321 # The KV_DIR is set using the KERNEL_DIR env var, the KV_DIR_OUT is set using a valid
322 # KBUILD_OUTPUT (in a decreasing priority list, we look for the env var, makefile var or the
323 # symlink /lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build).
324 get_version() {
325 local kbuild_output
326
327 # no need to execute this twice assuming KV_FULL is populated.
328 # we can force by unsetting KV_FULL
329 [ -n "${KV_FULL}" ] && return 0
330
331 # if we dont know KV_FULL, then we need too.
332 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
333 unset KV_DIR
334
335 # KV_DIR will contain the full path to the sources directory we should use
336 qeinfo "Determining the location of the kernel source code"
337 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
338 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
339
340 if [ -z "${KV_DIR}" ]
341 then
342 qeerror "Unable to find kernel sources at ${KERNEL_DIR}"
343 qeinfo "This package requires Linux sources."
344 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
345 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
346 qeinfo "(or the kernel you wish to build against)."
347 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
348 else
349 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
350 fi
351 return 1
352 fi
353
354 qeinfo "Found kernel source directory:"
355 qeinfo " ${KV_DIR}"
356
357 if [ ! -s "${KV_DIR}/Makefile" ]
358 then
359 qeerror "Could not find a Makefile in the kernel source directory."
360 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
361 return 1
362 fi
363
364 # OK so now we know our sources directory, but they might be using
365 # KBUILD_OUTPUT, and we need this for .config and localversions-*
366 # so we better find it eh?
367 # do we pass KBUILD_OUTPUT on the CLI?
368 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}"
369
370 # And if we didn't pass it, we can take a nosey in the Makefile
371 kbuild_output="$(getfilevar KBUILD_OUTPUT ${KV_DIR}/Makefile)"
372 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
373
374 # And contrary to existing functions I feel we shouldn't trust the
375 # directory name to find version information as this seems insane.
376 # so we parse ${KV_DIR}/Makefile
377 KV_MAJOR="$(getfilevar VERSION ${KV_DIR}/Makefile)"
378 KV_MINOR="$(getfilevar PATCHLEVEL ${KV_DIR}/Makefile)"
379 KV_PATCH="$(getfilevar SUBLEVEL ${KV_DIR}/Makefile)"
380 KV_EXTRA="$(getfilevar EXTRAVERSION ${KV_DIR}/Makefile)"
381
382 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
383 then
384 qeerror "Could not detect kernel version."
385 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
386 return 1
387 fi
388
389 # and in newer versions we can also pull LOCALVERSION if it is set.
390 # but before we do this, we need to find if we use a different object directory.
391 # This *WILL* break if the user is using localversions, but we assume it was
392 # caught before this if they are.
393 [ "${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}" == "$(uname -r)" ] && \
394 OUTPUT_DIR="${OUTPUT_DIR:-/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build}"
395
396 [ -h "${OUTPUT_DIR}" ] && KV_OUT_DIR="$(readlink -f ${OUTPUT_DIR})"
397 [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
398 if [ -n "${KV_OUT_DIR}" ];
399 then
400 qeinfo "Found kernel object directory:"
401 qeinfo " ${KV_OUT_DIR}"
402
403 KV_LOCAL="$(get_localversion ${KV_OUT_DIR})"
404 fi
405 # and if we STILL have not got it, then we better just set it to KV_DIR
406 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
407
408 KV_LOCAL="${KV_LOCAL}$(get_localversion ${KV_DIR})"
409 if linux_config_exists; then
410 KV_LOCAL="${KV_LOCAL}$(linux_chkconfig_string LOCALVERSION)"
411 KV_LOCAL="${KV_LOCAL//\"/}"
412
413 # For things like git that can append extra stuff:
414 [ -e ${KV_DIR}/scripts/setlocalversion ] &&
415 linux_chkconfig_builtin LOCALVERSION_AUTO &&
416 KV_LOCAL="${KV_LOCAL}$(sh ${KV_DIR}/scripts/setlocalversion ${KV_DIR})"
417 fi
418
419 # And we should set KV_FULL to the full expanded version
420 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
421
422 qeinfo "Found sources for kernel version:"
423 qeinfo " ${KV_FULL}"
424
425 return 0
426 }
427
428 # @FUNCTION: get_running_version
429 # @DESCRIPTION:
430 # It gets the version of the current running kernel and the result is the same as get_version() if the
431 # function can find the sources.
432 get_running_version() {
433 KV_FULL=$(uname -r)
434
435 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
436 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
437 unset KV_FULL
438 get_version
439 return $?
440 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
441 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
442 unset KV_FULL
443 get_version
444 return $?
445 else
446 KV_MAJOR=$(get_version_component_range 1 ${KV_FULL})
447 KV_MINOR=$(get_version_component_range 2 ${KV_FULL})
448 KV_PATCH=$(get_version_component_range 3- ${KV_FULL})
449 KV_PATCH=${KV_PATCH//-*}
450 [[ -n ${KV_FULL#*-} ]] && [[ -n ${KV_FULL//${KV_FULL#*-}} ]] \
451 && KV_EXTRA="-${KV_FULL#*-}"
452 fi
453 return 0
454 }
455
456
457 # ebuild check functions
458 # ---------------------------------------
459
460 # @FUNCTION: check_kernel_built
461 # @DESCRIPTION:
462 # This function verifies that the current kernel sources have been already prepared otherwise it dies.
463 check_kernel_built() {
464 # if we haven't determined the version yet, we need to
465 require_configured_kernel
466 get_version
467
468 if [ ! -f "${KV_OUT_DIR}/include/linux/version.h" ]
469 then
470 eerror "These sources have not yet been prepared."
471 eerror "We cannot build against an unprepared tree."
472 eerror "To resolve this, please type the following:"
473 eerror
474 eerror "# cd ${KV_DIR}"
475 eerror "# make oldconfig"
476 eerror "# make modules_prepare"
477 eerror
478 eerror "Then please try merging this module again."
479 die "Kernel sources need compiling first"
480 fi
481 }
482
483 # @FUNCTION: check_modules_supported
484 # @DESCRIPTION:
485 # This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
486 check_modules_supported() {
487 # if we haven't determined the version yet, we need too.
488 require_configured_kernel
489 get_version
490
491 if ! linux_chkconfig_builtin "MODULES"
492 then
493 eerror "These sources do not support loading external modules."
494 eerror "to be able to use this module please enable \"Loadable modules support\""
495 eerror "in your kernel, recompile and then try merging this module again."
496 die "No support for external modules in ${KV_FULL} config"
497 fi
498 }
499
500 # @FUNCTION: check_extra_config
501 # @DESCRIPTION:
502 # It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
503 # the prefix ~ is not used) doesn't satisfy the directive.
504 check_extra_config() {
505 local config negate die error reworkmodulenames
506 local soft_errors_count=0 hard_errors_count=0 config_required=0
507
508 # if we haven't determined the version yet, we need to
509 get_version
510
511 # Determine if we really need a .config. The only time when we don't need
512 # one is when all of the CONFIG_CHECK options are prefixed with "~".
513 for config in ${CONFIG_CHECK}
514 do
515 if [[ "${config:0:1}" != "~" ]]; then
516 config_required=1
517 break
518 fi
519 done
520
521 if [[ ${config_required} == 0 ]]; then
522 # In the case where we don't require a .config, we can now bail out
523 # if the user has no .config as there is nothing to do. Otherwise
524 # code later will cause a failure due to missing .config.
525 if ! linux_config_exists; then
526 return 0
527 fi
528 else
529 require_configured_kernel
530 fi
531
532 einfo "Checking for suitable kernel configuration options..."
533
534 for config in ${CONFIG_CHECK}
535 do
536 # if we specify any fatal, ensure we honor them
537 die=1
538 error=0
539 negate=0
540 reworkmodulenames=0
541
542 if [[ ${config:0:1} == "~" ]]; then
543 die=0
544 config=${config:1}
545 elif [[ ${config:0:1} == "@" ]]; then
546 die=0
547 reworkmodulenames=1
548 config=${config:1}
549 fi
550 if [[ ${config:0:1} == "!" ]]; then
551 negate=1
552 config=${config:1}
553 fi
554
555 if [[ ${negate} == 1 ]]; then
556 linux_chkconfig_present ${config} && error=2
557 elif [[ ${reworkmodulenames} == 1 ]]; then
558 local temp_config="${config//*:}" i n
559 config="${config//:*}"
560 if linux_chkconfig_present ${config}; then
561 for i in ${MODULE_NAMES}; do
562 n="${i//${temp_config}}"
563 [[ -z ${n//\(*} ]] && \
564 MODULE_IGNORE="${MODULE_IGNORE} ${temp_config}"
565 done
566 error=2
567 fi
568 else
569 linux_chkconfig_present ${config} || error=1
570 fi
571
572 if [[ ${error} > 0 ]]; then
573 local report_func="eerror" local_error
574 local_error="ERROR_${config}"
575 local_error="${!local_error}"
576
577 if [[ -z "${local_error}" ]]; then
578 # using old, deprecated format.
579 local_error="${config}_ERROR"
580 local_error="${!local_error}"
581 fi
582 if [[ ${die} == 0 && -z "${local_error}" ]]; then
583 #soft errors can be warnings
584 local_error="WARNING_${config}"
585 local_error="${!local_error}"
586 if [[ -n "${local_error}" ]] ; then
587 report_func="ewarn"
588 fi
589 fi
590
591 if [[ -z "${local_error}" ]]; then
592 [[ ${error} == 1 ]] \
593 && local_error="is not set when it should be." \
594 || local_error="should not be set. But it is."
595 local_error="CONFIG_${config}:\t ${local_error}"
596 fi
597 if [[ ${die} == 0 ]]; then
598 ${report_func} " ${local_error}"
599 soft_errors_count=$[soft_errors_count + 1]
600 else
601 ${report_func} " ${local_error}"
602 hard_errors_count=$[hard_errors_count + 1]
603 fi
604 fi
605 done
606
607 if [[ ${hard_errors_count} > 0 ]]; then
608 eerror "Please check to make sure these options are set correctly."
609 eerror "Failure to do so may cause unexpected problems."
610 eerror "Once you have satisfied these options, please try merging"
611 eerror "this package again."
612 die "Incorrect kernel configuration options"
613 elif [[ ${soft_errors_count} > 0 ]]; then
614 ewarn "Please check to make sure these options are set correctly."
615 ewarn "Failure to do so may cause unexpected problems."
616 else
617 eend 0
618 fi
619 }
620
621 check_zlibinflate() {
622 # if we haven't determined the version yet, we need to
623 require_configured_kernel
624 get_version
625
626 # although I restructured this code - I really really really dont support it!
627
628 # bug #27882 - zlib routines are only linked into the kernel
629 # if something compiled into the kernel calls them
630 #
631 # plus, for the cloop module, it appears that there's no way
632 # to get cloop.o to include a static zlib if CONFIG_MODVERSIONS
633 # is on
634
635 local INFLATE
636 local DEFLATE
637
638 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
639
640 ebegin "checking ZLIB_INFLATE"
641 getfilevar_isbuiltin CONFIG_ZLIB_INFLATE ${KV_DIR}/.config
642 eend $?
643 [ "$?" != 0 ] && die
644
645 ebegin "checking ZLIB_DEFLATE"
646 getfilevar_isbuiltin CONFIG_ZLIB_DEFLATE ${KV_DIR}/.config
647 eend $?
648 [ "$?" != 0 ] && die
649
650 local LINENO_START
651 local LINENO_END
652 local SYMBOLS
653 local x
654
655 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
656 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
657 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
658 (( LINENO_END = $LINENO_END - 1 ))
659 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
660
661 # okay, now we have a list of symbols
662 # we need to check each one in turn, to see whether it is set or not
663 for x in $SYMBOLS ; do
664 if [ "${!x}" = "y" ]; then
665 # we have a winner!
666 einfo "${x} ensures zlib is linked into your kernel - excellent"
667 return 0
668 fi
669 done
670
671 eerror
672 eerror "This kernel module requires ZLIB library support."
673 eerror "You have enabled zlib support in your kernel, but haven't enabled"
674 eerror "enabled any option that will ensure that zlib is linked into your"
675 eerror "kernel."
676 eerror
677 eerror "Please ensure that you enable at least one of these options:"
678 eerror
679
680 for x in $SYMBOLS ; do
681 eerror " * $x"
682 done
683
684 eerror
685 eerror "Please remember to recompile and install your kernel, and reboot"
686 eerror "into your new kernel before attempting to load this kernel module."
687
688 die "Kernel doesn't include zlib support"
689 }
690
691 ################################
692 # Default pkg_setup
693 # Also used when inheriting linux-mod to force a get_version call
694 # @FUNCTION: linux-info_pkg_setup
695 # @DESCRIPTION:
696 # Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
697 # to support the options specified in CONFIG_CHECK (if not null)
698 linux-info_pkg_setup() {
699 get_version || die "Unable to calculate Linux Kernel version"
700
701 if kernel_is 2 4; then
702 if [ "$( gcc-major-version )" -eq "4" ] ; then
703 echo
704 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"
705 ewarn "linux-2.4 (or modules building against a linux-2.4 kernel)!"
706 echo
707 ewarn "Either switch to another gcc-version (via gcc-config) or use a"
708 ewarn "newer kernel that supports gcc-4."
709 echo
710 ewarn "Also be aware that bugreports about gcc-4 not working"
711 ewarn "with linux-2.4 based ebuilds will be closed as INVALID!"
712 echo
713 epause 10
714 fi
715 fi
716
717 [ -n "${CONFIG_CHECK}" ] && check_extra_config;
718 }

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