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Revision 1.72 - (show annotations) (download)
Sun Sep 13 20:44:11 2009 UTC (5 years ago) by robbat2
Branch: MAIN
Changes since 1.71: +4 -2 lines
One backwards compatability fix while we are working on checking all ebuilds for the linux-info change.

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 1.71 2009/09/08 12:34:21 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=""
114 RDEPEND=""
115
116 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && \
117 DEPEND="kernel_linux? ( virtual/linux-sources )"
118
119 # Overwritable environment Var's
120 # ---------------------------------------
121 KERNEL_DIR="${KERNEL_DIR:-${ROOT}usr/src/linux}"
122
123
124 # Bug fixes
125 # fix to bug #75034
126 case ${ARCH} in
127 ppc) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
128 ppc64) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
129 esac
130
131 # @FUNCTION: set_arch_to_kernel
132 # @DESCRIPTION:
133 # Set the env ARCH to match what the kernel expects.
134 set_arch_to_kernel() { export ARCH=$(tc-arch-kernel); }
135 # @FUNCTION: set_arch_to_portage
136 # @DESCRIPTION:
137 # Set the env ARCH to match what portage expects.
138 set_arch_to_portage() { export ARCH=$(tc-arch); }
139
140 # qeinfo "Message"
141 # -------------------
142 # qeinfo is a quiet einfo call when EBUILD_PHASE
143 # should not have visible output.
144 qout() {
145 local outputmsg type
146 type=${1}
147 shift
148 outputmsg="${@}"
149 case "${EBUILD_PHASE}" in
150 depend) unset outputmsg;;
151 clean) unset outputmsg;;
152 preinst) unset outputmsg;;
153 esac
154 [ -n "${outputmsg}" ] && ${type} "${outputmsg}"
155 }
156
157 qeinfo() { qout einfo "${@}" ; }
158 qeerror() { qout eerror "${@}" ; }
159
160 # File Functions
161 # ---------------------------------------
162
163 # @FUNCTION: getfilevar
164 # @USAGE: variable configfile
165 # @RETURN: the value of the variable
166 # @DESCRIPTION:
167 # It detects the value of the variable defined in the file configfile. This is
168 # done by including the configfile, and printing the variable with Make.
169 # It WILL break if your makefile has missing dependencies!
170 getfilevar() {
171 local ERROR basefname basedname myARCH="${ARCH}"
172 ERROR=0
173
174 [ -z "${1}" ] && ERROR=1
175 [ ! -f "${2}" ] && ERROR=1
176
177 if [ "${ERROR}" = 1 ]
178 then
179 echo -e "\n"
180 eerror "getfilevar requires 2 variables, with the second a valid file."
181 eerror " getfilevar <VARIABLE> <CONFIGFILE>"
182 else
183 basefname="$(basename ${2})"
184 basedname="$(dirname ${2})"
185 unset ARCH
186
187 echo -e "e:\\n\\t@echo \$(${1})\\ninclude ${basefname}" | \
188 make -C "${basedname}" M="${S}" ${BUILD_FIXES} -s -f - 2>/dev/null
189
190 ARCH=${myARCH}
191 fi
192 }
193
194 # @FUNCTION: getfilevar_noexec
195 # @USAGE: variable configfile
196 # @RETURN: the value of the variable
197 # @DESCRIPTION:
198 # It detects the value of the variable defined in the file configfile.
199 # This is done with sed matching an expression only. If the variable is defined,
200 # you will run into problems. See getfilevar for those cases.
201 getfilevar_noexec() {
202 local ERROR basefname basedname mycat myARCH="${ARCH}"
203 ERROR=0
204 mycat='cat'
205
206 [ -z "${1}" ] && ERROR=1
207 [ ! -f "${2}" ] && ERROR=1
208 [ "${2%.gz}" != "${2}" ] && mycat='zcat'
209
210 if [ "${ERROR}" = 1 ]
211 then
212 echo -e "\n"
213 eerror "getfilevar_noexec requires 2 variables, with the second a valid file."
214 eerror " getfilevar_noexec <VARIABLE> <CONFIGFILE>"
215 else
216 ${mycat} "${2}" | \
217 sed -n \
218 -e "/^[[:space:]]*${1}[[:space:]]*=[[:space:]]*\(.*\)\$/{
219 s,^[^=]*[[:space:]]*=[[:space:]]*,,g ;
220 s,[[:space:]]*\$,,g ;
221 p
222 }"
223 fi
224 }
225
226
227 # @FUNCTION: linux_config_src_exists
228 # @RETURN: true or false
229 # @DESCRIPTION:
230 # It returns true if .config exists in a build directory otherwise false
231 linux_config_src_exists() {
232 [ -s "${KV_OUT_DIR}/.config" ]
233 }
234
235 # @FUNCTION: linux_config_bin_exists
236 # @RETURN: true or false
237 # @DESCRIPTION:
238 # It returns true if .config exists in /proc, otherwise false
239 linux_config_bin_exists() {
240 [ -s "/proc/config.gz" ]
241 }
242
243 # @FUNCTION: linux_config_exists
244 # @RETURN: true or false
245 # @DESCRIPTION:
246 # It returns true if .config exists otherwise false
247 #
248 # This function MUST be checked before using any of the linux_chkconfig_*
249 # functions.
250 linux_config_exists() {
251 linux_config_src_exists || linux_config_bin_exists
252 }
253
254 # @FUNCTION: require_configured_kernel
255 # @DESCRIPTION:
256 # This function verifies that the current kernel is configured (it checks against the existence of .config)
257 # otherwise it dies.
258 require_configured_kernel() {
259 if ! linux_config_src_exists; then
260 qeerror "Could not find a usable .config in the kernel source directory."
261 qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources."
262 qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that"
263 qeerror "it points to the necessary object directory so that it might find .config."
264 die "Kernel not configured; no .config found in ${KV_OUT_DIR}"
265 fi
266 }
267
268 # @FUNCTION: linux_chkconfig_present
269 # @USAGE: option
270 # @RETURN: true or false
271 # @DESCRIPTION:
272 # It checks that CONFIG_<option>=y or CONFIG_<option>=m is present in the current kernel .config
273 # If linux_config_exists returns false, the results of this are UNDEFINED. You
274 # MUST call linux_config_exists first.
275 linux_chkconfig_present() {
276 local RESULT
277 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
278 local config
279 config="${KV_OUT_DIR}/.config"
280 [ ! -f "${config}" ] && config="/proc/config.gz"
281 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
282 [ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1
283 }
284
285 # @FUNCTION: linux_chkconfig_module
286 # @USAGE: option
287 # @RETURN: true or false
288 # @DESCRIPTION:
289 # It checks that CONFIG_<option>=m is present in the current kernel .config
290 # If linux_config_exists returns false, the results of this are UNDEFINED. You
291 # MUST call linux_config_exists first.
292 linux_chkconfig_module() {
293 local RESULT
294 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
295 local config
296 config="${KV_OUT_DIR}/.config"
297 [ ! -f "${config}" ] && config="/proc/config.gz"
298 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
299 [ "${RESULT}" = "m" ] && return 0 || return 1
300 }
301
302 # @FUNCTION: linux_chkconfig_builtin
303 # @USAGE: option
304 # @RETURN: true or false
305 # @DESCRIPTION:
306 # It checks that CONFIG_<option>=y is present in the current kernel .config
307 # If linux_config_exists returns false, the results of this are UNDEFINED. You
308 # MUST call linux_config_exists first.
309 linux_chkconfig_builtin() {
310 local RESULT
311 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
312 local config
313 config="${KV_OUT_DIR}/.config"
314 [ ! -f "${config}" ] && config="/proc/config.gz"
315 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
316 [ "${RESULT}" = "y" ] && return 0 || return 1
317 }
318
319 # @FUNCTION: linux_chkconfig_string
320 # @USAGE: option
321 # @RETURN: CONFIG_<option>
322 # @DESCRIPTION:
323 # It prints the CONFIG_<option> value of the current kernel .config (it requires a configured kernel).
324 # If linux_config_exists returns false, the results of this are UNDEFINED. You
325 # MUST call linux_config_exists first.
326 linux_chkconfig_string() {
327 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
328 local config
329 config="${KV_OUT_DIR}/.config"
330 [ ! -f "${config}" ] && config="/proc/config.gz"
331 getfilevar_noexec "CONFIG_${1}" "${config}"
332 }
333
334 # Versioning Functions
335 # ---------------------------------------
336
337 # @FUNCTION: kernel_is
338 # @USAGE: [-lt -gt -le -ge -eq] major_number [minor_number patch_number]
339 # @RETURN: true or false
340 # @DESCRIPTION:
341 # It returns true when the current kernel version satisfies the comparison against the passed version.
342 # -eq is the default comparison.
343 #
344 # @CODE
345 # For Example where KV = 2.6.9
346 # kernel_is 2 4 returns false
347 # kernel_is 2 returns true
348 # kernel_is 2 6 returns true
349 # kernel_is 2 6 8 returns false
350 # kernel_is 2 6 9 returns true
351 # @CODE
352
353 # got the jist yet?
354
355 kernel_is() {
356 # if we haven't determined the version yet, we need to.
357 linux-info_get_any_version
358
359 local operator test value x=0 y=0 z=0
360
361 case ${1} in
362 -lt|lt) operator="-lt"; shift;;
363 -gt|gt) operator="-gt"; shift;;
364 -le|le) operator="-le"; shift;;
365 -ge|ge) operator="-ge"; shift;;
366 -eq|eq) operator="-eq"; shift;;
367 *) operator="-eq";;
368 esac
369
370 for x in ${@}; do
371 for((y=0; y<$((3 - ${#x})); y++)); do value="${value}0"; done
372 value="${value}${x}"
373 z=$((${z} + 1))
374
375 case ${z} in
376 1) for((y=0; y<$((3 - ${#KV_MAJOR})); y++)); do test="${test}0"; done;
377 test="${test}${KV_MAJOR}";;
378 2) for((y=0; y<$((3 - ${#KV_MINOR})); y++)); do test="${test}0"; done;
379 test="${test}${KV_MINOR}";;
380 3) for((y=0; y<$((3 - ${#KV_PATCH})); y++)); do test="${test}0"; done;
381 test="${test}${KV_PATCH}";;
382 *) die "Error in kernel-2_kernel_is(): Too many parameters.";;
383 esac
384 done
385
386 [ ${test} ${operator} ${value} ] && return 0 || return 1
387 }
388
389 get_localversion() {
390 local lv_list i x
391
392 # ignore files with ~ in it.
393 for i in $(ls ${1}/localversion* 2>/dev/null); do
394 [[ -n ${i//*~*} ]] && lv_list="${lv_list} ${i}"
395 done
396
397 for i in ${lv_list}; do
398 x="${x}$(<${i})"
399 done
400 x=${x/ /}
401 echo ${x}
402 }
403
404 # internal variable, so we know to only print the warning once
405 get_version_warning_done=
406
407 # @FUNCTION: get_version
408 # @DESCRIPTION:
409 # It gets the version of the kernel inside KERNEL_DIR and populates the KV_FULL variable
410 # (if KV_FULL is already set it does nothing).
411 #
412 # The kernel version variables (KV_MAJOR, KV_MINOR, KV_PATCH, KV_EXTRA and KV_LOCAL) are also set.
413 #
414 # The KV_DIR is set using the KERNEL_DIR env var, the KV_DIR_OUT is set using a valid
415 # KBUILD_OUTPUT (in a decreasing priority list, we look for the env var, makefile var or the
416 # symlink /lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build).
417 get_version() {
418 local kbuild_output
419
420 # no need to execute this twice assuming KV_FULL is populated.
421 # we can force by unsetting KV_FULL
422 [ -n "${KV_FULL}" ] && return 0
423
424 # if we dont know KV_FULL, then we need too.
425 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
426 unset KV_DIR
427
428 # KV_DIR will contain the full path to the sources directory we should use
429 [ -z "${get_version_warning_done}" ] && \
430 qeinfo "Determining the location of the kernel source code"
431 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
432 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
433
434 if [ -z "${KV_DIR}" ]
435 then
436 if [ -z "${get_version_warning_done}" ]; then
437 get_version_warning_done=1
438 qeerror "Unable to find kernel sources at ${KERNEL_DIR}"
439 #qeinfo "This package requires Linux sources."
440 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
441 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
442 qeinfo "(or the kernel you wish to build against)."
443 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
444 else
445 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
446 fi
447 fi
448 return 1
449 fi
450
451 if [ -z "${get_version_warning_done}" ]; then
452 qeinfo "Found kernel source directory:"
453 qeinfo " ${KV_DIR}"
454 fi
455
456 if [ ! -s "${KV_DIR}/Makefile" ]
457 then
458 if [ -z "${get_version_warning_done}" ]; then
459 get_version_warning_done=1
460 qeerror "Could not find a Makefile in the kernel source directory."
461 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
462 fi
463 return 1
464 fi
465
466 # OK so now we know our sources directory, but they might be using
467 # KBUILD_OUTPUT, and we need this for .config and localversions-*
468 # so we better find it eh?
469 # do we pass KBUILD_OUTPUT on the CLI?
470 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}"
471
472 # And if we didn't pass it, we can take a nosey in the Makefile
473 kbuild_output="$(getfilevar_noexec KBUILD_OUTPUT ${KV_DIR}/Makefile)"
474 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
475
476 # And contrary to existing functions I feel we shouldn't trust the
477 # directory name to find version information as this seems insane.
478 # so we parse ${KV_DIR}/Makefile
479 KV_MAJOR="$(getfilevar_noexec VERSION ${KV_DIR}/Makefile)"
480 KV_MINOR="$(getfilevar_noexec PATCHLEVEL ${KV_DIR}/Makefile)"
481 KV_PATCH="$(getfilevar_noexec SUBLEVEL ${KV_DIR}/Makefile)"
482 KV_EXTRA="$(getfilevar_noexec EXTRAVERSION ${KV_DIR}/Makefile)"
483
484 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
485 then
486 if [ -z "${get_version_warning_done}" ]; then
487 get_version_warning_done=1
488 qeerror "Could not detect kernel version."
489 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
490 fi
491 return 1
492 fi
493
494 # and in newer versions we can also pull LOCALVERSION if it is set.
495 # but before we do this, we need to find if we use a different object directory.
496 # This *WILL* break if the user is using localversions, but we assume it was
497 # caught before this if they are.
498 [ "${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}" == "$(uname -r)" ] && \
499 OUTPUT_DIR="${OUTPUT_DIR:-/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build}"
500
501 [ -h "${OUTPUT_DIR}" ] && KV_OUT_DIR="$(readlink -f ${OUTPUT_DIR})"
502 [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
503 if [ -n "${KV_OUT_DIR}" ];
504 then
505 qeinfo "Found kernel object directory:"
506 qeinfo " ${KV_OUT_DIR}"
507
508 KV_LOCAL="$(get_localversion ${KV_OUT_DIR})"
509 fi
510 # and if we STILL have not got it, then we better just set it to KV_DIR
511 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
512
513 KV_LOCAL="${KV_LOCAL}$(get_localversion ${KV_DIR})"
514 if linux_config_src_exists; then
515 KV_LOCAL="${KV_LOCAL}$(linux_chkconfig_string LOCALVERSION)"
516 KV_LOCAL="${KV_LOCAL//\"/}"
517
518 # For things like git that can append extra stuff:
519 [ -e ${KV_DIR}/scripts/setlocalversion ] &&
520 linux_chkconfig_builtin LOCALVERSION_AUTO &&
521 KV_LOCAL="${KV_LOCAL}$(sh ${KV_DIR}/scripts/setlocalversion ${KV_DIR})"
522 fi
523
524 # And we should set KV_FULL to the full expanded version
525 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
526
527 qeinfo "Found sources for kernel version:"
528 qeinfo " ${KV_FULL}"
529
530 return 0
531 }
532
533 # @FUNCTION: get_running_version
534 # @DESCRIPTION:
535 # It gets the version of the current running kernel and the result is the same as get_version() if the
536 # function can find the sources.
537 get_running_version() {
538 KV_FULL=$(uname -r)
539
540 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
541 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
542 unset KV_FULL
543 get_version
544 return $?
545 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
546 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
547 unset KV_FULL
548 get_version
549 return $?
550 else
551 KV_MAJOR=$(get_version_component_range 1 ${KV_FULL})
552 KV_MINOR=$(get_version_component_range 2 ${KV_FULL})
553 KV_PATCH=$(get_version_component_range 3- ${KV_FULL})
554 KV_PATCH=${KV_PATCH//-*}
555 [[ -n ${KV_FULL#*-} ]] && [[ -n ${KV_FULL//${KV_FULL#*-}} ]] \
556 && KV_EXTRA="-${KV_FULL#*-}"
557 fi
558 return 0
559 }
560
561 # This next function is named with the eclass prefix to avoid conflicts with
562 # some old versionator-like eclass functions.
563
564 # @FUNCTION: linux-info_get_any_version
565 # @DESCRIPTION:
566 # This attempts to find the version of the sources, and otherwise falls back to
567 # the version of the running kernel.
568 linux-info_get_any_version() {
569 get_version
570 if [[ $? -ne 0 ]]; then
571 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
572 get_running_version
573 fi
574 }
575
576
577 # ebuild check functions
578 # ---------------------------------------
579
580 # @FUNCTION: check_kernel_built
581 # @DESCRIPTION:
582 # This function verifies that the current kernel sources have been already prepared otherwise it dies.
583 check_kernel_built() {
584 # if we haven't determined the version yet, we need to
585 require_configured_kernel
586 get_version
587
588 if [ ! -f "${KV_OUT_DIR}/include/linux/version.h" ]
589 then
590 eerror "These sources have not yet been prepared."
591 eerror "We cannot build against an unprepared tree."
592 eerror "To resolve this, please type the following:"
593 eerror
594 eerror "# cd ${KV_DIR}"
595 eerror "# make oldconfig"
596 eerror "# make modules_prepare"
597 eerror
598 eerror "Then please try merging this module again."
599 die "Kernel sources need compiling first"
600 fi
601 }
602
603 # @FUNCTION: check_modules_supported
604 # @DESCRIPTION:
605 # This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
606 check_modules_supported() {
607 # if we haven't determined the version yet, we need too.
608 require_configured_kernel
609 get_version
610
611 if ! linux_chkconfig_builtin "MODULES"
612 then
613 eerror "These sources do not support loading external modules."
614 eerror "to be able to use this module please enable \"Loadable modules support\""
615 eerror "in your kernel, recompile and then try merging this module again."
616 die "No support for external modules in ${KV_FULL} config"
617 fi
618 }
619
620 # @FUNCTION: check_extra_config
621 # @DESCRIPTION:
622 # It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
623 # the prefix ~ is not used) doesn't satisfy the directive.
624 check_extra_config() {
625 local config negate die error reworkmodulenames
626 local soft_errors_count=0 hard_errors_count=0 config_required=0
627
628 # if we haven't determined the version yet, we need to
629 linux-info_get_any_version
630
631 # Determine if we really need a .config. The only time when we don't need
632 # one is when all of the CONFIG_CHECK options are prefixed with "~".
633 for config in ${CONFIG_CHECK}
634 do
635 if [[ "${config:0:1}" != "~" ]]; then
636 config_required=1
637 break
638 fi
639 done
640
641 # TODO: After we enable the new code for /proc/config.gz, we need to
642 # change this back to linux_config_exists.
643 if [[ ${config_required} == 0 ]]; then
644 # In the case where we don't require a .config, we can now bail out
645 # if the user has no .config as there is nothing to do. Otherwise
646 # code later will cause a failure due to missing .config.
647 if ! linux_config_src_exists; then
648 ewarn "Unable to check for the following kernel config options due"
649 ewarn "to absence of any configured kernel sources or compiled"
650 ewarn "config:"
651 for config in ${CONFIG_CHECK}; do
652 ewarn " - ${config#\~}"
653 done
654 ewarn "You're on your own to make sure they are set if needed."
655 return 0
656 fi
657 else
658 [ -n "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
659 fi
660
661 einfo "Checking for suitable kernel configuration options..."
662
663 for config in ${CONFIG_CHECK}
664 do
665 # if we specify any fatal, ensure we honor them
666 die=1
667 error=0
668 negate=0
669 reworkmodulenames=0
670
671 if [[ ${config:0:1} == "~" ]]; then
672 die=0
673 config=${config:1}
674 elif [[ ${config:0:1} == "@" ]]; then
675 die=0
676 reworkmodulenames=1
677 config=${config:1}
678 fi
679 if [[ ${config:0:1} == "!" ]]; then
680 negate=1
681 config=${config:1}
682 fi
683
684 if [[ ${negate} == 1 ]]; then
685 linux_chkconfig_present ${config} && error=2
686 elif [[ ${reworkmodulenames} == 1 ]]; then
687 local temp_config="${config//*:}" i n
688 config="${config//:*}"
689 if linux_chkconfig_present ${config}; then
690 for i in ${MODULE_NAMES}; do
691 n="${i//${temp_config}}"
692 [[ -z ${n//\(*} ]] && \
693 MODULE_IGNORE="${MODULE_IGNORE} ${temp_config}"
694 done
695 error=2
696 fi
697 else
698 linux_chkconfig_present ${config} || error=1
699 fi
700
701 if [[ ${error} > 0 ]]; then
702 local report_func="eerror" local_error
703 local_error="ERROR_${config}"
704 local_error="${!local_error}"
705
706 if [[ -z "${local_error}" ]]; then
707 # using old, deprecated format.
708 local_error="${config}_ERROR"
709 local_error="${!local_error}"
710 fi
711 if [[ ${die} == 0 && -z "${local_error}" ]]; then
712 #soft errors can be warnings
713 local_error="WARNING_${config}"
714 local_error="${!local_error}"
715 if [[ -n "${local_error}" ]] ; then
716 report_func="ewarn"
717 fi
718 fi
719
720 if [[ -z "${local_error}" ]]; then
721 [[ ${error} == 1 ]] \
722 && local_error="is not set when it should be." \
723 || local_error="should not be set. But it is."
724 local_error="CONFIG_${config}:\t ${local_error}"
725 fi
726 if [[ ${die} == 0 ]]; then
727 ${report_func} " ${local_error}"
728 soft_errors_count=$[soft_errors_count + 1]
729 else
730 ${report_func} " ${local_error}"
731 hard_errors_count=$[hard_errors_count + 1]
732 fi
733 fi
734 done
735
736 if [[ ${hard_errors_count} > 0 ]]; then
737 eerror "Please check to make sure these options are set correctly."
738 eerror "Failure to do so may cause unexpected problems."
739 eerror "Once you have satisfied these options, please try merging"
740 eerror "this package again."
741 die "Incorrect kernel configuration options"
742 elif [[ ${soft_errors_count} > 0 ]]; then
743 ewarn "Please check to make sure these options are set correctly."
744 ewarn "Failure to do so may cause unexpected problems."
745 else
746 eend 0
747 fi
748 }
749
750 check_zlibinflate() {
751 # if we haven't determined the version yet, we need to
752 require_configured_kernel
753 get_version
754
755 # although I restructured this code - I really really really dont support it!
756
757 # bug #27882 - zlib routines are only linked into the kernel
758 # if something compiled into the kernel calls them
759 #
760 # plus, for the cloop module, it appears that there's no way
761 # to get cloop.o to include a static zlib if CONFIG_MODVERSIONS
762 # is on
763
764 local INFLATE
765 local DEFLATE
766
767 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
768
769 ebegin "checking ZLIB_INFLATE"
770 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
771 eend $?
772 [ "$?" != 0 ] && die
773
774 ebegin "checking ZLIB_DEFLATE"
775 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
776 eend $?
777 [ "$?" != 0 ] && die
778
779 local LINENO_START
780 local LINENO_END
781 local SYMBOLS
782 local x
783
784 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
785 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
786 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
787 (( LINENO_END = $LINENO_END - 1 ))
788 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
789
790 # okay, now we have a list of symbols
791 # we need to check each one in turn, to see whether it is set or not
792 for x in $SYMBOLS ; do
793 if [ "${!x}" = "y" ]; then
794 # we have a winner!
795 einfo "${x} ensures zlib is linked into your kernel - excellent"
796 return 0
797 fi
798 done
799
800 eerror
801 eerror "This kernel module requires ZLIB library support."
802 eerror "You have enabled zlib support in your kernel, but haven't enabled"
803 eerror "enabled any option that will ensure that zlib is linked into your"
804 eerror "kernel."
805 eerror
806 eerror "Please ensure that you enable at least one of these options:"
807 eerror
808
809 for x in $SYMBOLS ; do
810 eerror " * $x"
811 done
812
813 eerror
814 eerror "Please remember to recompile and install your kernel, and reboot"
815 eerror "into your new kernel before attempting to load this kernel module."
816
817 die "Kernel doesn't include zlib support"
818 }
819
820 ################################
821 # Default pkg_setup
822 # Also used when inheriting linux-mod to force a get_version call
823 # @FUNCTION: linux-info_pkg_setup
824 # @DESCRIPTION:
825 # Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
826 # to support the options specified in CONFIG_CHECK (if not null)
827 linux-info_pkg_setup() {
828 linux-info_get_any_version
829
830 if kernel_is 2 4; then
831 if [ "$( gcc-major-version )" -eq "4" ] ; then
832 echo
833 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"
834 ewarn "linux-2.4 (or modules building against a linux-2.4 kernel)!"
835 echo
836 ewarn "Either switch to another gcc-version (via gcc-config) or use a"
837 ewarn "newer kernel that supports gcc-4."
838 echo
839 ewarn "Also be aware that bugreports about gcc-4 not working"
840 ewarn "with linux-2.4 based ebuilds will be closed as INVALID!"
841 echo
842 epause 10
843 fi
844 fi
845
846 [ -n "${CONFIG_CHECK}" ] && check_extra_config;
847 }

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