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Revision 1.91 - (show annotations) (download)
Mon Dec 12 22:01:37 2011 UTC (2 years, 10 months ago) by vapier
Branch: MAIN
Changes since 1.90: +15 -28 lines
merge kernel_is updates between kernel-2 and linux-info eclasses

1 # Copyright 1999-2011 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 1.90 2011/08/22 04:46:32 vapier Exp $
4
5 # @ECLASS: linux-info.eclass
6 # @MAINTAINER:
7 # kernel-misc@gentoo.org
8 # @AUTHOR:
9 # Original author: John Mylchreest <johnm@gentoo.org>
10 # @BLURB: eclass used for accessing kernel related information
11 # @DESCRIPTION:
12 # This eclass is used as a central eclass for accessing kernel
13 # related information for source or binary already installed.
14 # It is vital for linux-mod.eclass to function correctly, and is split
15 # out so that any ebuild behaviour "templates" are abstracted out
16 # using additional eclasses.
17 #
18 # "kernel config" in this file means:
19 # The .config of the currently installed sources is used as the first
20 # preference, with a fall-back to bundled config (/proc/config.gz) if available.
21
22 # A Couple of env vars are available to effect usage of this eclass
23 # These are as follows:
24
25 # @ECLASS-VARIABLE: KERNEL_DIR
26 # @DESCRIPTION:
27 # A string containing the directory of the target kernel sources. The default value is
28 # "/usr/src/linux"
29
30 # @ECLASS-VARIABLE: CONFIG_CHECK
31 # @DESCRIPTION:
32 # A string containing a list of .config options to check for before
33 # proceeding with the install.
34 #
35 # e.g.: CONFIG_CHECK="MTRR"
36 #
37 # You can also check that an option doesn't exist by
38 # prepending it with an exclamation mark (!).
39 #
40 # e.g.: CONFIG_CHECK="!MTRR"
41 #
42 # To simply warn about a missing option, prepend a '~'.
43 # It may be combined with '!'.
44 #
45 # In general, most checks should be non-fatal. The only time fatal checks should
46 # be used is for building kernel modules or cases that a compile will fail
47 # without the option.
48 #
49 # This is to allow usage of binary kernels, and minimal systems without kernel
50 # sources.
51
52 # @ECLASS-VARIABLE: ERROR_<CFG>
53 # @DESCRIPTION:
54 # A string containing the error message to display when the check against CONFIG_CHECK
55 # fails. <CFG> should reference the appropriate option used in CONFIG_CHECK.
56 #
57 # e.g.: ERROR_MTRR="MTRR exists in the .config but shouldn't!!"
58
59 # @ECLASS-VARIABLE: KBUILD_OUTPUT
60 # @DESCRIPTION:
61 # A string passed on commandline, or set from the kernel makefile. It contains the directory
62 # which is to be used as the kernel object directory.
63
64 # There are also a couple of variables which are set by this, and shouldn't be
65 # set by hand. These are as follows:
66
67 # @ECLASS-VARIABLE: KV_FULL
68 # @DESCRIPTION:
69 # A read-only variable. It's a string containing the full kernel version. ie: 2.6.9-gentoo-johnm-r1
70
71 # @ECLASS-VARIABLE: KV_MAJOR
72 # @DESCRIPTION:
73 # A read-only variable. It's an integer containing the kernel major version. ie: 2
74
75 # @ECLASS-VARIABLE: KV_MINOR
76 # @DESCRIPTION:
77 # A read-only variable. It's an integer containing the kernel minor version. ie: 6
78
79 # @ECLASS-VARIABLE: KV_PATCH
80 # @DESCRIPTION:
81 # A read-only variable. It's an integer containing the kernel patch version. ie: 9
82
83 # @ECLASS-VARIABLE: KV_EXTRA
84 # @DESCRIPTION:
85 # A read-only variable. It's a string containing the kernel EXTRAVERSION. ie: -gentoo
86
87 # @ECLASS-VARIABLE: KV_LOCAL
88 # @DESCRIPTION:
89 # A read-only variable. It's a string containing the kernel LOCALVERSION concatenation. ie: -johnm
90
91 # @ECLASS-VARIABLE: KV_DIR
92 # @DESCRIPTION:
93 # A read-only variable. It's a string containing the kernel source directory, will be null if
94 # KERNEL_DIR is invalid.
95
96 # @ECLASS-VARIABLE: KV_OUT_DIR
97 # @DESCRIPTION:
98 # A read-only variable. It's a string containing the kernel object directory, will be KV_DIR unless
99 # KBUILD_OUTPUT is used. This should be used for referencing .config.
100
101 # And to ensure all the weirdness with crosscompile
102 inherit toolchain-funcs versionator
103
104 EXPORT_FUNCTIONS pkg_setup
105
106 DEPEND=""
107 RDEPEND=""
108
109 # Overwritable environment Var's
110 # ---------------------------------------
111 KERNEL_DIR="${KERNEL_DIR:-${ROOT}usr/src/linux}"
112
113
114 # Bug fixes
115 # fix to bug #75034
116 case ${ARCH} in
117 ppc) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
118 ppc64) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
119 esac
120
121 # @FUNCTION: set_arch_to_kernel
122 # @DESCRIPTION:
123 # Set the env ARCH to match what the kernel expects.
124 set_arch_to_kernel() { export ARCH=$(tc-arch-kernel); }
125 # @FUNCTION: set_arch_to_portage
126 # @DESCRIPTION:
127 # Set the env ARCH to match what portage expects.
128 set_arch_to_portage() { export ARCH=$(tc-arch); }
129
130 # qeinfo "Message"
131 # -------------------
132 # qeinfo is a quiet einfo call when EBUILD_PHASE
133 # should not have visible output.
134 qout() {
135 local outputmsg type
136 type=${1}
137 shift
138 outputmsg="${@}"
139 case "${EBUILD_PHASE}" in
140 depend) unset outputmsg;;
141 clean) unset outputmsg;;
142 preinst) unset outputmsg;;
143 esac
144 [ -n "${outputmsg}" ] && ${type} "${outputmsg}"
145 }
146
147 qeinfo() { qout einfo "${@}" ; }
148 qewarn() { qout ewarn "${@}" ; }
149 qeerror() { qout eerror "${@}" ; }
150
151 # File Functions
152 # ---------------------------------------
153
154 # @FUNCTION: getfilevar
155 # @USAGE: variable configfile
156 # @RETURN: the value of the variable
157 # @DESCRIPTION:
158 # It detects the value of the variable defined in the file configfile. This is
159 # done by including the configfile, and printing the variable with Make.
160 # It WILL break if your makefile has missing dependencies!
161 getfilevar() {
162 local ERROR basefname basedname myARCH="${ARCH}"
163 ERROR=0
164
165 [ -z "${1}" ] && ERROR=1
166 [ ! -f "${2}" ] && ERROR=1
167
168 if [ "${ERROR}" = 1 ]
169 then
170 echo -e "\n"
171 eerror "getfilevar requires 2 variables, with the second a valid file."
172 eerror " getfilevar <VARIABLE> <CONFIGFILE>"
173 else
174 basefname="$(basename ${2})"
175 basedname="$(dirname ${2})"
176 unset ARCH
177
178 echo -e "e:\\n\\t@echo \$(${1})\\ninclude ${basefname}" | \
179 make -C "${basedname}" M="${S}" ${BUILD_FIXES} -s -f - 2>/dev/null
180
181 ARCH=${myARCH}
182 fi
183 }
184
185 # @FUNCTION: getfilevar_noexec
186 # @USAGE: variable configfile
187 # @RETURN: the value of the variable
188 # @DESCRIPTION:
189 # It detects the value of the variable defined in the file configfile.
190 # This is done with sed matching an expression only. If the variable is defined,
191 # you will run into problems. See getfilevar for those cases.
192 getfilevar_noexec() {
193 local ERROR basefname basedname mycat myARCH="${ARCH}"
194 ERROR=0
195 mycat='cat'
196
197 [ -z "${1}" ] && ERROR=1
198 [ ! -f "${2}" ] && ERROR=1
199 [ "${2%.gz}" != "${2}" ] && mycat='zcat'
200
201 if [ "${ERROR}" = 1 ]
202 then
203 echo -e "\n"
204 eerror "getfilevar_noexec requires 2 variables, with the second a valid file."
205 eerror " getfilevar_noexec <VARIABLE> <CONFIGFILE>"
206 else
207 ${mycat} "${2}" | \
208 sed -n \
209 -e "/^[[:space:]]*${1}[[:space:]]*:\\?=[[:space:]]*\(.*\)\$/{
210 s,^[^=]*[[:space:]]*=[[:space:]]*,,g ;
211 s,[[:space:]]*\$,,g ;
212 p
213 }"
214 fi
215 }
216
217 # @ECLASS-VARIABLE: _LINUX_CONFIG_EXISTS_DONE
218 # @INTERNAL
219 # @DESCRIPTION:
220 # This is only set if one of the linux_config_*exists functions has been called.
221 # We use it for a QA warning that the check for a config has not been performed,
222 # as linux_chkconfig* in non-legacy mode WILL return an undefined value if no
223 # config is available at all.
224 _LINUX_CONFIG_EXISTS_DONE=
225
226 linux_config_qa_check() {
227 local f="$1"
228 if [ -z "${_LINUX_CONFIG_EXISTS_DONE}" ]; then
229 ewarn "QA: You called $f before any linux_config_exists!"
230 ewarn "QA: The return value of $f will NOT guaranteed later!"
231 fi
232 }
233
234 # @FUNCTION: linux_config_src_exists
235 # @RETURN: true or false
236 # @DESCRIPTION:
237 # It returns true if .config exists in a build directory otherwise false
238 linux_config_src_exists() {
239 export _LINUX_CONFIG_EXISTS_DONE=1
240 [ -s "${KV_OUT_DIR}/.config" ]
241 }
242
243 # @FUNCTION: linux_config_bin_exists
244 # @RETURN: true or false
245 # @DESCRIPTION:
246 # It returns true if .config exists in /proc, otherwise false
247 linux_config_bin_exists() {
248 export _LINUX_CONFIG_EXISTS_DONE=1
249 [ -s "/proc/config.gz" ]
250 }
251
252 # @FUNCTION: linux_config_exists
253 # @RETURN: true or false
254 # @DESCRIPTION:
255 # It returns true if .config exists otherwise false
256 #
257 # This function MUST be checked before using any of the linux_chkconfig_*
258 # functions.
259 linux_config_exists() {
260 linux_config_src_exists || linux_config_bin_exists
261 }
262
263 # @FUNCTION: require_configured_kernel
264 # @DESCRIPTION:
265 # This function verifies that the current kernel is configured (it checks against the existence of .config)
266 # otherwise it dies.
267 require_configured_kernel() {
268 if ! linux_config_src_exists; then
269 qeerror "Could not find a usable .config in the kernel source directory."
270 qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources."
271 qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that"
272 qeerror "it points to the necessary object directory so that it might find .config."
273 die "Kernel not configured; no .config found in ${KV_OUT_DIR}"
274 fi
275 }
276
277 # @FUNCTION: linux_chkconfig_present
278 # @USAGE: option
279 # @RETURN: true or false
280 # @DESCRIPTION:
281 # It checks that CONFIG_<option>=y or CONFIG_<option>=m is present in the current kernel .config
282 # If linux_config_exists returns false, the results of this are UNDEFINED. You
283 # MUST call linux_config_exists first.
284 linux_chkconfig_present() {
285 linux_config_qa_check linux_chkconfig_present
286 local RESULT
287 local config
288 config="${KV_OUT_DIR}/.config"
289 [ ! -f "${config}" ] && config="/proc/config.gz"
290 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
291 [ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1
292 }
293
294 # @FUNCTION: linux_chkconfig_module
295 # @USAGE: option
296 # @RETURN: true or false
297 # @DESCRIPTION:
298 # It checks that CONFIG_<option>=m is present in the current kernel .config
299 # If linux_config_exists returns false, the results of this are UNDEFINED. You
300 # MUST call linux_config_exists first.
301 linux_chkconfig_module() {
302 linux_config_qa_check linux_chkconfig_module
303 local RESULT
304 local config
305 config="${KV_OUT_DIR}/.config"
306 [ ! -f "${config}" ] && config="/proc/config.gz"
307 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
308 [ "${RESULT}" = "m" ] && return 0 || return 1
309 }
310
311 # @FUNCTION: linux_chkconfig_builtin
312 # @USAGE: option
313 # @RETURN: true or false
314 # @DESCRIPTION:
315 # It checks that CONFIG_<option>=y is present in the current kernel .config
316 # If linux_config_exists returns false, the results of this are UNDEFINED. You
317 # MUST call linux_config_exists first.
318 linux_chkconfig_builtin() {
319 linux_config_qa_check linux_chkconfig_builtin
320 local RESULT
321 local config
322 config="${KV_OUT_DIR}/.config"
323 [ ! -f "${config}" ] && config="/proc/config.gz"
324 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
325 [ "${RESULT}" = "y" ] && return 0 || return 1
326 }
327
328 # @FUNCTION: linux_chkconfig_string
329 # @USAGE: option
330 # @RETURN: CONFIG_<option>
331 # @DESCRIPTION:
332 # It prints the CONFIG_<option> value of the current kernel .config (it requires a configured kernel).
333 # If linux_config_exists returns false, the results of this are UNDEFINED. You
334 # MUST call linux_config_exists first.
335 linux_chkconfig_string() {
336 linux_config_qa_check linux_chkconfig_string
337 local config
338 config="${KV_OUT_DIR}/.config"
339 [ ! -f "${config}" ] && config="/proc/config.gz"
340 getfilevar_noexec "CONFIG_${1}" "${config}"
341 }
342
343 # Versioning Functions
344 # ---------------------------------------
345
346 # @FUNCTION: kernel_is
347 # @USAGE: [-lt -gt -le -ge -eq] major_number [minor_number patch_number]
348 # @RETURN: true or false
349 # @DESCRIPTION:
350 # It returns true when the current kernel version satisfies the comparison against the passed version.
351 # -eq is the default comparison.
352 #
353 # @CODE
354 # For Example where KV = 2.6.9
355 # kernel_is 2 4 returns false
356 # kernel_is 2 returns true
357 # kernel_is 2 6 returns true
358 # kernel_is 2 6 8 returns false
359 # kernel_is 2 6 9 returns true
360 # @CODE
361
362 # Note: duplicated in kernel-2.eclass
363 kernel_is() {
364 # if we haven't determined the version yet, we need to.
365 linux-info_get_any_version
366
367 # Now we can continue
368 local operator test value
369
370 case ${1#-} in
371 lt) operator="-lt"; shift;;
372 gt) operator="-gt"; shift;;
373 le) operator="-le"; shift;;
374 ge) operator="-ge"; shift;;
375 eq) operator="-eq"; shift;;
376 *) operator="-eq";;
377 esac
378 [[ $# -gt 3 ]] && die "Error in kernel-2_kernel_is(): too many parameters"
379
380 : $(( test = (KV_MAJOR << 16) + (KV_MINOR << 8) + KV_PATCH ))
381 : $(( value = (${1:-${KV_MAJOR}} << 16) + (${2:-${KV_MINOR}} << 8) + ${3:-${KV_PATCH}} ))
382 [ ${test} ${operator} ${value} ]
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 ${x}
398 }
399
400 # Check if the Makefile is valid for direct parsing.
401 # Check status results:
402 # - PASS, use 'getfilevar' to extract values
403 # - FAIL, use 'getfilevar_noexec' to extract values
404 # The check may fail if:
405 # - make is not present
406 # - corruption exists in the kernel makefile
407 get_makefile_extract_function() {
408 local a='' b='' mkfunc='getfilevar'
409 a="$(getfilevar VERSION ${KERNEL_MAKEFILE})"
410 b="$(getfilevar_noexec VERSION ${KERNEL_MAKEFILE})"
411 [[ "${a}" != "${b}" ]] && mkfunc='getfilevar_noexec'
412 echo "${mkfunc}"
413 }
414
415 # internal variable, so we know to only print the warning once
416 get_version_warning_done=
417
418 # @FUNCTION: get_version
419 # @DESCRIPTION:
420 # It gets the version of the kernel inside KERNEL_DIR and populates the KV_FULL variable
421 # (if KV_FULL is already set it does nothing).
422 #
423 # The kernel version variables (KV_MAJOR, KV_MINOR, KV_PATCH, KV_EXTRA and KV_LOCAL) are also set.
424 #
425 # The KV_DIR is set using the KERNEL_DIR env var, the KV_DIR_OUT is set using a valid
426 # KBUILD_OUTPUT (in a decreasing priority list, we look for the env var, makefile var or the
427 # symlink /lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build).
428 get_version() {
429 local kbuild_output mkfunc tmplocal
430
431 # no need to execute this twice assuming KV_FULL is populated.
432 # we can force by unsetting KV_FULL
433 [ -n "${KV_FULL}" ] && return 0
434
435 # if we dont know KV_FULL, then we need too.
436 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
437 unset KV_DIR
438
439 # KV_DIR will contain the full path to the sources directory we should use
440 [ -z "${get_version_warning_done}" ] && \
441 qeinfo "Determining the location of the kernel source code"
442 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
443 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
444
445 if [ -z "${KV_DIR}" ]
446 then
447 if [ -z "${get_version_warning_done}" ]; then
448 get_version_warning_done=1
449 qeerror "Unable to find kernel sources at ${KERNEL_DIR}"
450 #qeinfo "This package requires Linux sources."
451 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
452 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
453 qeinfo "(or the kernel you wish to build against)."
454 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
455 else
456 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
457 fi
458 fi
459 return 1
460 fi
461
462 if [ -z "${get_version_warning_done}" ]; then
463 qeinfo "Found kernel source directory:"
464 qeinfo " ${KV_DIR}"
465 fi
466
467 if [ ! -s "${KV_DIR}/Makefile" ]
468 then
469 if [ -z "${get_version_warning_done}" ]; then
470 get_version_warning_done=1
471 qeerror "Could not find a Makefile in the kernel source directory."
472 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
473 fi
474 return 1
475 fi
476
477 # OK so now we know our sources directory, but they might be using
478 # KBUILD_OUTPUT, and we need this for .config and localversions-*
479 # so we better find it eh?
480 # do we pass KBUILD_OUTPUT on the CLI?
481 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}"
482
483 # keep track of it
484 KERNEL_MAKEFILE="${KV_DIR}/Makefile"
485
486 # Decide the function used to extract makefile variables.
487 mkfunc="$(get_makefile_extract_function "${KERNEL_MAKEFILE}")"
488
489 # And if we didn't pass it, we can take a nosey in the Makefile
490 kbuild_output="$(${mkfunc} KBUILD_OUTPUT ${KERNEL_MAKEFILE})"
491 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
492
493 # And contrary to existing functions I feel we shouldn't trust the
494 # directory name to find version information as this seems insane.
495 # so we parse ${KERNEL_MAKEFILE}
496 KV_MAJOR="$(${mkfunc} VERSION ${KERNEL_MAKEFILE})"
497 KV_MINOR="$(${mkfunc} PATCHLEVEL ${KERNEL_MAKEFILE})"
498 KV_PATCH="$(${mkfunc} SUBLEVEL ${KERNEL_MAKEFILE})"
499 KV_EXTRA="$(${mkfunc} EXTRAVERSION ${KERNEL_MAKEFILE})"
500
501 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
502 then
503 if [ -z "${get_version_warning_done}" ]; then
504 get_version_warning_done=1
505 qeerror "Could not detect kernel version."
506 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
507 fi
508 return 1
509 fi
510
511 # and in newer versions we can also pull LOCALVERSION if it is set.
512 # but before we do this, we need to find if we use a different object directory.
513 # This *WILL* break if the user is using localversions, but we assume it was
514 # caught before this if they are.
515 OUTPUT_DIR="${OUTPUT_DIR:-/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build}"
516
517 [ -h "${OUTPUT_DIR}" ] && KV_OUT_DIR="$(readlink -f ${OUTPUT_DIR})"
518 [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
519 if [ -n "${KV_OUT_DIR}" ];
520 then
521 qeinfo "Found kernel object directory:"
522 qeinfo " ${KV_OUT_DIR}"
523 fi
524 # and if we STILL have not got it, then we better just set it to KV_DIR
525 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
526
527 # Grab the kernel release from the output directory.
528 # TODO: we MUST detect kernel.release being out of date, and 'return 1' from
529 # this function.
530 if [ -s "${KV_OUT_DIR}"/include/config/kernel.release ]; then
531 KV_LOCAL=$(<"${KV_OUT_DIR}"/include/config/kernel.release)
532 elif [ -s "${KV_OUT_DIR}"/.kernelrelease ]; then
533 KV_LOCAL=$(<"${KV_OUT_DIR}"/.kernelrelease)
534 else
535 KV_LOCAL=
536 fi
537
538 # KV_LOCAL currently contains the full release; discard the first bits.
539 tmplocal=${KV_LOCAL#${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}}
540
541 # If the updated local version was not changed, the tree is not prepared.
542 # Clear out KV_LOCAL in that case.
543 # TODO: this does not detect a change in the localversion part between
544 # kernel.release and the value that would be generated.
545 if [ "$KV_LOCAL" = "$tmplocal" ]; then
546 KV_LOCAL=
547 else
548 KV_LOCAL=$tmplocal
549 fi
550
551 # And we should set KV_FULL to the full expanded version
552 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
553
554 qeinfo "Found sources for kernel version:"
555 qeinfo " ${KV_FULL}"
556
557 return 0
558 }
559
560 # @FUNCTION: get_running_version
561 # @DESCRIPTION:
562 # It gets the version of the current running kernel and the result is the same as get_version() if the
563 # function can find the sources.
564 get_running_version() {
565 KV_FULL=$(uname -r)
566
567 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile && -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
568 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
569 KBUILD_OUTPUT=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
570 unset KV_FULL
571 get_version
572 return $?
573 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
574 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
575 unset KV_FULL
576 get_version
577 return $?
578 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
579 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
580 unset KV_FULL
581 get_version
582 return $?
583 else
584 KV_MAJOR=$(get_version_component_range 1 ${KV_FULL})
585 KV_MINOR=$(get_version_component_range 2 ${KV_FULL})
586 KV_PATCH=$(get_version_component_range 3 ${KV_FULL})
587 KV_PATCH=${KV_PATCH//-*}
588 KV_EXTRA="${KV_FULL#${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}}"
589 fi
590 return 0
591 }
592
593 # This next function is named with the eclass prefix to avoid conflicts with
594 # some old versionator-like eclass functions.
595
596 # @FUNCTION: linux-info_get_any_version
597 # @DESCRIPTION:
598 # This attempts to find the version of the sources, and otherwise falls back to
599 # the version of the running kernel.
600 linux-info_get_any_version() {
601 get_version
602 if [[ $? -ne 0 ]]; then
603 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
604 get_running_version
605 fi
606 }
607
608
609 # ebuild check functions
610 # ---------------------------------------
611
612 # @FUNCTION: check_kernel_built
613 # @DESCRIPTION:
614 # This function verifies that the current kernel sources have been already prepared otherwise it dies.
615 check_kernel_built() {
616 # if we haven't determined the version yet, we need to
617 require_configured_kernel
618 get_version
619
620 if [ ! -f "${KV_OUT_DIR}/include/linux/version.h" ]
621 then
622 eerror "These sources have not yet been prepared."
623 eerror "We cannot build against an unprepared tree."
624 eerror "To resolve this, please type the following:"
625 eerror
626 eerror "# cd ${KV_DIR}"
627 eerror "# make oldconfig"
628 eerror "# make modules_prepare"
629 eerror
630 eerror "Then please try merging this module again."
631 die "Kernel sources need compiling first"
632 fi
633 }
634
635 # @FUNCTION: check_modules_supported
636 # @DESCRIPTION:
637 # This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
638 check_modules_supported() {
639 # if we haven't determined the version yet, we need too.
640 require_configured_kernel
641 get_version
642
643 if ! linux_chkconfig_builtin "MODULES"
644 then
645 eerror "These sources do not support loading external modules."
646 eerror "to be able to use this module please enable \"Loadable modules support\""
647 eerror "in your kernel, recompile and then try merging this module again."
648 die "No support for external modules in ${KV_FULL} config"
649 fi
650 }
651
652 # @FUNCTION: check_extra_config
653 # @DESCRIPTION:
654 # It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
655 # the prefix ~ is not used) doesn't satisfy the directive.
656 check_extra_config() {
657 local config negate die error reworkmodulenames
658 local soft_errors_count=0 hard_errors_count=0 config_required=0
659 # store the value of the QA check, because otherwise we won't catch usages
660 # after if check_extra_config is called AND other direct calls are done
661 # later.
662 local old_LINUX_CONFIG_EXISTS_DONE="${_LINUX_CONFIG_EXISTS_DONE}"
663
664 # if we haven't determined the version yet, we need to
665 linux-info_get_any_version
666
667 # Determine if we really need a .config. The only time when we don't need
668 # one is when all of the CONFIG_CHECK options are prefixed with "~".
669 for config in ${CONFIG_CHECK}
670 do
671 if [[ "${config:0:1}" != "~" ]]; then
672 config_required=1
673 break
674 fi
675 done
676
677 if [[ ${config_required} == 0 ]]; then
678 # In the case where we don't require a .config, we can now bail out
679 # if the user has no .config as there is nothing to do. Otherwise
680 # code later will cause a failure due to missing .config.
681 if ! linux_config_exists; then
682 ewarn "Unable to check for the following kernel config options due"
683 ewarn "to absence of any configured kernel sources or compiled"
684 ewarn "config:"
685 for config in ${CONFIG_CHECK}; do
686 local_error="ERROR_${config#\~}"
687 msg="${!local_error}"
688 if [[ "x${msg}" == "x" ]]; then
689 local_error="WARNING_${config#\~}"
690 msg="${!local_error}"
691 fi
692 ewarn " - ${config#\~}${msg:+ - }${msg}"
693 done
694 ewarn "You're on your own to make sure they are set if needed."
695 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
696 return 0
697 fi
698 else
699 require_configured_kernel
700 fi
701
702 einfo "Checking for suitable kernel configuration options..."
703
704 for config in ${CONFIG_CHECK}
705 do
706 # if we specify any fatal, ensure we honor them
707 die=1
708 error=0
709 negate=0
710 reworkmodulenames=0
711
712 if [[ ${config:0:1} == "~" ]]; then
713 die=0
714 config=${config:1}
715 elif [[ ${config:0:1} == "@" ]]; then
716 die=0
717 reworkmodulenames=1
718 config=${config:1}
719 fi
720 if [[ ${config:0:1} == "!" ]]; then
721 negate=1
722 config=${config:1}
723 fi
724
725 if [[ ${negate} == 1 ]]; then
726 linux_chkconfig_present ${config} && error=2
727 elif [[ ${reworkmodulenames} == 1 ]]; then
728 local temp_config="${config//*:}" i n
729 config="${config//:*}"
730 if linux_chkconfig_present ${config}; then
731 for i in ${MODULE_NAMES}; do
732 n="${i//${temp_config}}"
733 [[ -z ${n//\(*} ]] && \
734 MODULE_IGNORE="${MODULE_IGNORE} ${temp_config}"
735 done
736 error=2
737 fi
738 else
739 linux_chkconfig_present ${config} || error=1
740 fi
741
742 if [[ ${error} > 0 ]]; then
743 local report_func="eerror" local_error
744 local_error="ERROR_${config}"
745 local_error="${!local_error}"
746
747 if [[ -z "${local_error}" ]]; then
748 # using old, deprecated format.
749 local_error="${config}_ERROR"
750 local_error="${!local_error}"
751 fi
752 if [[ ${die} == 0 && -z "${local_error}" ]]; then
753 #soft errors can be warnings
754 local_error="WARNING_${config}"
755 local_error="${!local_error}"
756 if [[ -n "${local_error}" ]] ; then
757 report_func="ewarn"
758 fi
759 fi
760
761 if [[ -z "${local_error}" ]]; then
762 [[ ${error} == 1 ]] \
763 && local_error="is not set when it should be." \
764 || local_error="should not be set. But it is."
765 local_error="CONFIG_${config}:\t ${local_error}"
766 fi
767 if [[ ${die} == 0 ]]; then
768 ${report_func} " ${local_error}"
769 soft_errors_count=$[soft_errors_count + 1]
770 else
771 ${report_func} " ${local_error}"
772 hard_errors_count=$[hard_errors_count + 1]
773 fi
774 fi
775 done
776
777 if [[ ${hard_errors_count} > 0 ]]; then
778 eerror "Please check to make sure these options are set correctly."
779 eerror "Failure to do so may cause unexpected problems."
780 eerror "Once you have satisfied these options, please try merging"
781 eerror "this package again."
782 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
783 die "Incorrect kernel configuration options"
784 elif [[ ${soft_errors_count} > 0 ]]; then
785 ewarn "Please check to make sure these options are set correctly."
786 ewarn "Failure to do so may cause unexpected problems."
787 else
788 eend 0
789 fi
790 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
791 }
792
793 check_zlibinflate() {
794 # if we haven't determined the version yet, we need to
795 require_configured_kernel
796 get_version
797
798 # although I restructured this code - I really really really dont support it!
799
800 # bug #27882 - zlib routines are only linked into the kernel
801 # if something compiled into the kernel calls them
802 #
803 # plus, for the cloop module, it appears that there's no way
804 # to get cloop.o to include a static zlib if CONFIG_MODVERSIONS
805 # is on
806
807 local INFLATE
808 local DEFLATE
809
810 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
811
812 ebegin "checking ZLIB_INFLATE"
813 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
814 eend $?
815 [ "$?" != 0 ] && die
816
817 ebegin "checking ZLIB_DEFLATE"
818 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
819 eend $?
820 [ "$?" != 0 ] && die
821
822 local LINENO_START
823 local LINENO_END
824 local SYMBOLS
825 local x
826
827 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
828 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
829 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
830 (( LINENO_END = $LINENO_END - 1 ))
831 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
832
833 # okay, now we have a list of symbols
834 # we need to check each one in turn, to see whether it is set or not
835 for x in $SYMBOLS ; do
836 if [ "${!x}" = "y" ]; then
837 # we have a winner!
838 einfo "${x} ensures zlib is linked into your kernel - excellent"
839 return 0
840 fi
841 done
842
843 eerror
844 eerror "This kernel module requires ZLIB library support."
845 eerror "You have enabled zlib support in your kernel, but haven't enabled"
846 eerror "enabled any option that will ensure that zlib is linked into your"
847 eerror "kernel."
848 eerror
849 eerror "Please ensure that you enable at least one of these options:"
850 eerror
851
852 for x in $SYMBOLS ; do
853 eerror " * $x"
854 done
855
856 eerror
857 eerror "Please remember to recompile and install your kernel, and reboot"
858 eerror "into your new kernel before attempting to load this kernel module."
859
860 die "Kernel doesn't include zlib support"
861 }
862
863 ################################
864 # Default pkg_setup
865 # Also used when inheriting linux-mod to force a get_version call
866 # @FUNCTION: linux-info_pkg_setup
867 # @DESCRIPTION:
868 # Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
869 # to support the options specified in CONFIG_CHECK (if not null)
870 linux-info_pkg_setup() {
871 linux-info_get_any_version
872
873 if kernel_is 2 4; then
874 if [ "$( gcc-major-version )" -eq "4" ] ; then
875 echo
876 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"
877 ewarn "linux-2.4 (or modules building against a linux-2.4 kernel)!"
878 echo
879 ewarn "Either switch to another gcc-version (via gcc-config) or use a"
880 ewarn "newer kernel that supports gcc-4."
881 echo
882 ewarn "Also be aware that bugreports about gcc-4 not working"
883 ewarn "with linux-2.4 based ebuilds will be closed as INVALID!"
884 echo
885 epause 10
886 fi
887 fi
888
889 [ -n "${CONFIG_CHECK}" ] && check_extra_config;
890 }

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