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Revision 1.64 - (show annotations) (download)
Sun Sep 6 23:12:29 2009 UTC (4 years, 10 months ago) by robbat2
Branch: MAIN
Changes since 1.63: +5 -4 lines
Bug 283320: Fix minor typo for config.gz. Improve ewarn output, more migration.

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 1.63 2009/09/06 23:04:37 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 ${x}
398 }
399
400 # internal variable, so we know to only print the warning once
401 get_version_warning_done=
402
403 # @FUNCTION: get_version
404 # @DESCRIPTION:
405 # It gets the version of the kernel inside KERNEL_DIR and populates the KV_FULL variable
406 # (if KV_FULL is already set it does nothing).
407 #
408 # The kernel version variables (KV_MAJOR, KV_MINOR, KV_PATCH, KV_EXTRA and KV_LOCAL) are also set.
409 #
410 # The KV_DIR is set using the KERNEL_DIR env var, the KV_DIR_OUT is set using a valid
411 # KBUILD_OUTPUT (in a decreasing priority list, we look for the env var, makefile var or the
412 # symlink /lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build).
413 get_version() {
414 local kbuild_output
415
416 # no need to execute this twice assuming KV_FULL is populated.
417 # we can force by unsetting KV_FULL
418 [ -n "${KV_FULL}" ] && return 0
419
420 # if we dont know KV_FULL, then we need too.
421 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
422 unset KV_DIR
423
424 # KV_DIR will contain the full path to the sources directory we should use
425 [ -z "${get_version_warning_done}" ] && \
426 qeinfo "Determining the location of the kernel source code"
427 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
428 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
429
430 if [ -z "${KV_DIR}" ]
431 then
432 if [ -z "${get_version_warning_done}" ]; then
433 get_version_warning_done=1
434 qeerror "Unable to find kernel sources at ${KERNEL_DIR}"
435 #qeinfo "This package requires Linux sources."
436 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
437 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
438 qeinfo "(or the kernel you wish to build against)."
439 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
440 else
441 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
442 fi
443 fi
444 return 1
445 fi
446
447 if [ -z "${get_version_warning_done}" ]; then
448 qeinfo "Found kernel source directory:"
449 qeinfo " ${KV_DIR}"
450 fi
451
452 if [ ! -s "${KV_DIR}/Makefile" ]
453 then
454 if [ -z "${get_version_warning_done}" ]; then
455 get_version_warning_done=1
456 qeerror "Could not find a Makefile in the kernel source directory."
457 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
458 fi
459 return 1
460 fi
461
462 # OK so now we know our sources directory, but they might be using
463 # KBUILD_OUTPUT, and we need this for .config and localversions-*
464 # so we better find it eh?
465 # do we pass KBUILD_OUTPUT on the CLI?
466 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}"
467
468 # And if we didn't pass it, we can take a nosey in the Makefile
469 kbuild_output="$(getfilevar_noexec KBUILD_OUTPUT ${KV_DIR}/Makefile)"
470 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
471
472 # And contrary to existing functions I feel we shouldn't trust the
473 # directory name to find version information as this seems insane.
474 # so we parse ${KV_DIR}/Makefile
475 KV_MAJOR="$(getfilevar_noexec VERSION ${KV_DIR}/Makefile)"
476 KV_MINOR="$(getfilevar_noexec PATCHLEVEL ${KV_DIR}/Makefile)"
477 KV_PATCH="$(getfilevar_noexec SUBLEVEL ${KV_DIR}/Makefile)"
478 KV_EXTRA="$(getfilevar_noexec EXTRAVERSION ${KV_DIR}/Makefile)"
479
480 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
481 then
482 if [ -z "${get_version_warning_done}" ]; then
483 get_version_warning_done=1
484 qeerror "Could not detect kernel version."
485 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
486 fi
487 return 1
488 fi
489
490 # and in newer versions we can also pull LOCALVERSION if it is set.
491 # but before we do this, we need to find if we use a different object directory.
492 # This *WILL* break if the user is using localversions, but we assume it was
493 # caught before this if they are.
494 [ "${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}" == "$(uname -r)" ] && \
495 OUTPUT_DIR="${OUTPUT_DIR:-/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build}"
496
497 [ -h "${OUTPUT_DIR}" ] && KV_OUT_DIR="$(readlink -f ${OUTPUT_DIR})"
498 [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
499 if [ -n "${KV_OUT_DIR}" ];
500 then
501 qeinfo "Found kernel object directory:"
502 qeinfo " ${KV_OUT_DIR}"
503
504 KV_LOCAL="$(get_localversion ${KV_OUT_DIR})"
505 fi
506 # and if we STILL have not got it, then we better just set it to KV_DIR
507 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
508
509 KV_LOCAL="${KV_LOCAL}$(get_localversion ${KV_DIR})"
510 if linux_config_exists; then
511 KV_LOCAL="${KV_LOCAL}$(linux_chkconfig_string LOCALVERSION)"
512 KV_LOCAL="${KV_LOCAL//\"/}"
513
514 # For things like git that can append extra stuff:
515 [ -e ${KV_DIR}/scripts/setlocalversion ] &&
516 linux_chkconfig_builtin LOCALVERSION_AUTO &&
517 KV_LOCAL="${KV_LOCAL}$(sh ${KV_DIR}/scripts/setlocalversion ${KV_DIR})"
518 fi
519
520 # And we should set KV_FULL to the full expanded version
521 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
522
523 qeinfo "Found sources for kernel version:"
524 qeinfo " ${KV_FULL}"
525
526 return 0
527 }
528
529 # @FUNCTION: get_running_version
530 # @DESCRIPTION:
531 # It gets the version of the current running kernel and the result is the same as get_version() if the
532 # function can find the sources.
533 get_running_version() {
534 KV_FULL=$(uname -r)
535
536 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
537 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
538 unset KV_FULL
539 get_version
540 return $?
541 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
542 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
543 unset KV_FULL
544 get_version
545 return $?
546 else
547 KV_MAJOR=$(get_version_component_range 1 ${KV_FULL})
548 KV_MINOR=$(get_version_component_range 2 ${KV_FULL})
549 KV_PATCH=$(get_version_component_range 3- ${KV_FULL})
550 KV_PATCH=${KV_PATCH//-*}
551 [[ -n ${KV_FULL#*-} ]] && [[ -n ${KV_FULL//${KV_FULL#*-}} ]] \
552 && KV_EXTRA="-${KV_FULL#*-}"
553 fi
554 return 0
555 }
556
557
558 # ebuild check functions
559 # ---------------------------------------
560
561 # @FUNCTION: check_kernel_built
562 # @DESCRIPTION:
563 # This function verifies that the current kernel sources have been already prepared otherwise it dies.
564 check_kernel_built() {
565 # if we haven't determined the version yet, we need to
566 require_configured_kernel
567 get_version
568
569 if [ ! -f "${KV_OUT_DIR}/include/linux/version.h" ]
570 then
571 eerror "These sources have not yet been prepared."
572 eerror "We cannot build against an unprepared tree."
573 eerror "To resolve this, please type the following:"
574 eerror
575 eerror "# cd ${KV_DIR}"
576 eerror "# make oldconfig"
577 eerror "# make modules_prepare"
578 eerror
579 eerror "Then please try merging this module again."
580 die "Kernel sources need compiling first"
581 fi
582 }
583
584 # @FUNCTION: check_modules_supported
585 # @DESCRIPTION:
586 # This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
587 check_modules_supported() {
588 # if we haven't determined the version yet, we need too.
589 require_configured_kernel
590 get_version
591
592 if ! linux_chkconfig_builtin "MODULES"
593 then
594 eerror "These sources do not support loading external modules."
595 eerror "to be able to use this module please enable \"Loadable modules support\""
596 eerror "in your kernel, recompile and then try merging this module again."
597 die "No support for external modules in ${KV_FULL} config"
598 fi
599 }
600
601 # @FUNCTION: check_extra_config
602 # @DESCRIPTION:
603 # It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
604 # the prefix ~ is not used) doesn't satisfy the directive.
605 check_extra_config() {
606 local config negate die error reworkmodulenames
607 local soft_errors_count=0 hard_errors_count=0 config_required=0
608
609 # if we haven't determined the version yet, we need to
610 get_version
611
612 # Determine if we really need a .config. The only time when we don't need
613 # one is when all of the CONFIG_CHECK options are prefixed with "~".
614 for config in ${CONFIG_CHECK}
615 do
616 if [[ "${config:0:1}" != "~" ]]; then
617 config_required=1
618 break
619 fi
620 done
621
622 if [[ ${config_required} == 0 ]]; then
623 # In the case where we don't require a .config, we can now bail out
624 # if the user has no .config as there is nothing to do. Otherwise
625 # code later will cause a failure due to missing .config.
626 if ! linux_config_exists; then
627 ewarn "Unable to check for the following kernel config options due"
628 ewarn "to absence of any configured kernel sources or compiled"
629 ewarn "config:"
630 for config in ${CONFIG_CHECK}; do
631 ewarn " - ${config#\~}"
632 done
633 ewarn "You're on your own to make sure they are set if needed."
634 return 0
635 fi
636 else
637 [ -n "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
638 fi
639
640 einfo "Checking for suitable kernel configuration options..."
641
642 for config in ${CONFIG_CHECK}
643 do
644 # if we specify any fatal, ensure we honor them
645 die=1
646 error=0
647 negate=0
648 reworkmodulenames=0
649
650 if [[ ${config:0:1} == "~" ]]; then
651 die=0
652 config=${config:1}
653 elif [[ ${config:0:1} == "@" ]]; then
654 die=0
655 reworkmodulenames=1
656 config=${config:1}
657 fi
658 if [[ ${config:0:1} == "!" ]]; then
659 negate=1
660 config=${config:1}
661 fi
662
663 if [[ ${negate} == 1 ]]; then
664 linux_chkconfig_present ${config} && error=2
665 elif [[ ${reworkmodulenames} == 1 ]]; then
666 local temp_config="${config//*:}" i n
667 config="${config//:*}"
668 if linux_chkconfig_present ${config}; then
669 for i in ${MODULE_NAMES}; do
670 n="${i//${temp_config}}"
671 [[ -z ${n//\(*} ]] && \
672 MODULE_IGNORE="${MODULE_IGNORE} ${temp_config}"
673 done
674 error=2
675 fi
676 else
677 linux_chkconfig_present ${config} || error=1
678 fi
679
680 if [[ ${error} > 0 ]]; then
681 local report_func="eerror" local_error
682 local_error="ERROR_${config}"
683 local_error="${!local_error}"
684
685 if [[ -z "${local_error}" ]]; then
686 # using old, deprecated format.
687 local_error="${config}_ERROR"
688 local_error="${!local_error}"
689 fi
690 if [[ ${die} == 0 && -z "${local_error}" ]]; then
691 #soft errors can be warnings
692 local_error="WARNING_${config}"
693 local_error="${!local_error}"
694 if [[ -n "${local_error}" ]] ; then
695 report_func="ewarn"
696 fi
697 fi
698
699 if [[ -z "${local_error}" ]]; then
700 [[ ${error} == 1 ]] \
701 && local_error="is not set when it should be." \
702 || local_error="should not be set. But it is."
703 local_error="CONFIG_${config}:\t ${local_error}"
704 fi
705 if [[ ${die} == 0 ]]; then
706 ${report_func} " ${local_error}"
707 soft_errors_count=$[soft_errors_count + 1]
708 else
709 ${report_func} " ${local_error}"
710 hard_errors_count=$[hard_errors_count + 1]
711 fi
712 fi
713 done
714
715 if [[ ${hard_errors_count} > 0 ]]; then
716 eerror "Please check to make sure these options are set correctly."
717 eerror "Failure to do so may cause unexpected problems."
718 eerror "Once you have satisfied these options, please try merging"
719 eerror "this package again."
720 die "Incorrect kernel configuration options"
721 elif [[ ${soft_errors_count} > 0 ]]; then
722 ewarn "Please check to make sure these options are set correctly."
723 ewarn "Failure to do so may cause unexpected problems."
724 else
725 eend 0
726 fi
727 }
728
729 check_zlibinflate() {
730 # if we haven't determined the version yet, we need to
731 require_configured_kernel
732 get_version
733
734 # although I restructured this code - I really really really dont support it!
735
736 # bug #27882 - zlib routines are only linked into the kernel
737 # if something compiled into the kernel calls them
738 #
739 # plus, for the cloop module, it appears that there's no way
740 # to get cloop.o to include a static zlib if CONFIG_MODVERSIONS
741 # is on
742
743 local INFLATE
744 local DEFLATE
745
746 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
747
748 ebegin "checking ZLIB_INFLATE"
749 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
750 eend $?
751 [ "$?" != 0 ] && die
752
753 ebegin "checking ZLIB_DEFLATE"
754 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
755 eend $?
756 [ "$?" != 0 ] && die
757
758 local LINENO_START
759 local LINENO_END
760 local SYMBOLS
761 local x
762
763 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
764 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
765 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
766 (( LINENO_END = $LINENO_END - 1 ))
767 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
768
769 # okay, now we have a list of symbols
770 # we need to check each one in turn, to see whether it is set or not
771 for x in $SYMBOLS ; do
772 if [ "${!x}" = "y" ]; then
773 # we have a winner!
774 einfo "${x} ensures zlib is linked into your kernel - excellent"
775 return 0
776 fi
777 done
778
779 eerror
780 eerror "This kernel module requires ZLIB library support."
781 eerror "You have enabled zlib support in your kernel, but haven't enabled"
782 eerror "enabled any option that will ensure that zlib is linked into your"
783 eerror "kernel."
784 eerror
785 eerror "Please ensure that you enable at least one of these options:"
786 eerror
787
788 for x in $SYMBOLS ; do
789 eerror " * $x"
790 done
791
792 eerror
793 eerror "Please remember to recompile and install your kernel, and reboot"
794 eerror "into your new kernel before attempting to load this kernel module."
795
796 die "Kernel doesn't include zlib support"
797 }
798
799 ################################
800 # Default pkg_setup
801 # Also used when inheriting linux-mod to force a get_version call
802 # @FUNCTION: linux-info_pkg_setup
803 # @DESCRIPTION:
804 # Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
805 # to support the options specified in CONFIG_CHECK (if not null)
806 linux-info_pkg_setup() {
807 get_version
808 if [[ $rc -ne 0 ]]; then
809 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
810 get_running_version
811 fi
812
813 if kernel_is 2 4; then
814 if [ "$( gcc-major-version )" -eq "4" ] ; then
815 echo
816 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"
817 ewarn "linux-2.4 (or modules building against a linux-2.4 kernel)!"
818 echo
819 ewarn "Either switch to another gcc-version (via gcc-config) or use a"
820 ewarn "newer kernel that supports gcc-4."
821 echo
822 ewarn "Also be aware that bugreports about gcc-4 not working"
823 ewarn "with linux-2.4 based ebuilds will be closed as INVALID!"
824 echo
825 epause 10
826 fi
827 fi
828
829 [ -n "${CONFIG_CHECK}" ] && check_extra_config;
830 }

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