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Revision 1.89 - (show annotations) (download)
Thu Aug 18 14:58:57 2011 UTC (3 years ago) by vapier
Branch: MAIN
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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 1.88 2011/03/29 19:57:51 flameeyes 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 # And to ensure all the weirdness with crosscompile
105 inherit toolchain-funcs versionator
106
107 EXPORT_FUNCTIONS pkg_setup
108
109 DEPEND=""
110 RDEPEND=""
111
112 # Overwritable environment Var's
113 # ---------------------------------------
114 KERNEL_DIR="${KERNEL_DIR:-${ROOT}usr/src/linux}"
115
116
117 # Bug fixes
118 # fix to bug #75034
119 case ${ARCH} in
120 ppc) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
121 ppc64) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
122 esac
123
124 # @FUNCTION: set_arch_to_kernel
125 # @DESCRIPTION:
126 # Set the env ARCH to match what the kernel expects.
127 set_arch_to_kernel() { export ARCH=$(tc-arch-kernel); }
128 # @FUNCTION: set_arch_to_portage
129 # @DESCRIPTION:
130 # Set the env ARCH to match what portage expects.
131 set_arch_to_portage() { export ARCH=$(tc-arch); }
132
133 # qeinfo "Message"
134 # -------------------
135 # qeinfo is a quiet einfo call when EBUILD_PHASE
136 # should not have visible output.
137 qout() {
138 local outputmsg type
139 type=${1}
140 shift
141 outputmsg="${@}"
142 case "${EBUILD_PHASE}" in
143 depend) unset outputmsg;;
144 clean) unset outputmsg;;
145 preinst) unset outputmsg;;
146 esac
147 [ -n "${outputmsg}" ] && ${type} "${outputmsg}"
148 }
149
150 qeinfo() { qout einfo "${@}" ; }
151 qewarn() { qout ewarn "${@}" ; }
152 qeerror() { qout eerror "${@}" ; }
153
154 # File Functions
155 # ---------------------------------------
156
157 # @FUNCTION: getfilevar
158 # @USAGE: variable configfile
159 # @RETURN: the value of the variable
160 # @DESCRIPTION:
161 # It detects the value of the variable defined in the file configfile. This is
162 # done by including the configfile, and printing the variable with Make.
163 # It WILL break if your makefile has missing dependencies!
164 getfilevar() {
165 local ERROR basefname basedname myARCH="${ARCH}"
166 ERROR=0
167
168 [ -z "${1}" ] && ERROR=1
169 [ ! -f "${2}" ] && ERROR=1
170
171 if [ "${ERROR}" = 1 ]
172 then
173 echo -e "\n"
174 eerror "getfilevar requires 2 variables, with the second a valid file."
175 eerror " getfilevar <VARIABLE> <CONFIGFILE>"
176 else
177 basefname="$(basename ${2})"
178 basedname="$(dirname ${2})"
179 unset ARCH
180
181 echo -e "e:\\n\\t@echo \$(${1})\\ninclude ${basefname}" | \
182 make -C "${basedname}" M="${S}" ${BUILD_FIXES} -s -f - 2>/dev/null
183
184 ARCH=${myARCH}
185 fi
186 }
187
188 # @FUNCTION: getfilevar_noexec
189 # @USAGE: variable configfile
190 # @RETURN: the value of the variable
191 # @DESCRIPTION:
192 # It detects the value of the variable defined in the file configfile.
193 # This is done with sed matching an expression only. If the variable is defined,
194 # you will run into problems. See getfilevar for those cases.
195 getfilevar_noexec() {
196 local ERROR basefname basedname mycat myARCH="${ARCH}"
197 ERROR=0
198 mycat='cat'
199
200 [ -z "${1}" ] && ERROR=1
201 [ ! -f "${2}" ] && ERROR=1
202 [ "${2%.gz}" != "${2}" ] && mycat='zcat'
203
204 if [ "${ERROR}" = 1 ]
205 then
206 echo -e "\n"
207 eerror "getfilevar_noexec requires 2 variables, with the second a valid file."
208 eerror " getfilevar_noexec <VARIABLE> <CONFIGFILE>"
209 else
210 ${mycat} "${2}" | \
211 sed -n \
212 -e "/^[[:space:]]*${1}[[:space:]]*:\\?=[[:space:]]*\(.*\)\$/{
213 s,^[^=]*[[:space:]]*=[[:space:]]*,,g ;
214 s,[[:space:]]*\$,,g ;
215 p
216 }"
217 fi
218 }
219
220 # @PRIVATE-VARIABLE: _LINUX_CONFIG_EXISTS_DONE
221 # @DESCRIPTION:
222 # This is only set if one of the linux_config_*exists functions has been called.
223 # We use it for a QA warning that the check for a config has not been performed,
224 # as linux_chkconfig* in non-legacy mode WILL return an undefined value if no
225 # config is available at all.
226 _LINUX_CONFIG_EXISTS_DONE=
227
228 linux_config_qa_check() {
229 local f="$1"
230 if [ -z "${_LINUX_CONFIG_EXISTS_DONE}" ]; then
231 ewarn "QA: You called $f before any linux_config_exists!"
232 ewarn "QA: The return value of $f will NOT guaranteed later!"
233 fi
234 }
235
236 # @FUNCTION: linux_config_src_exists
237 # @RETURN: true or false
238 # @DESCRIPTION:
239 # It returns true if .config exists in a build directory otherwise false
240 linux_config_src_exists() {
241 export _LINUX_CONFIG_EXISTS_DONE=1
242 [ -s "${KV_OUT_DIR}/.config" ]
243 }
244
245 # @FUNCTION: linux_config_bin_exists
246 # @RETURN: true or false
247 # @DESCRIPTION:
248 # It returns true if .config exists in /proc, otherwise false
249 linux_config_bin_exists() {
250 export _LINUX_CONFIG_EXISTS_DONE=1
251 [ -s "/proc/config.gz" ]
252 }
253
254 # @FUNCTION: linux_config_exists
255 # @RETURN: true or false
256 # @DESCRIPTION:
257 # It returns true if .config exists otherwise false
258 #
259 # This function MUST be checked before using any of the linux_chkconfig_*
260 # functions.
261 linux_config_exists() {
262 linux_config_src_exists || linux_config_bin_exists
263 }
264
265 # @FUNCTION: require_configured_kernel
266 # @DESCRIPTION:
267 # This function verifies that the current kernel is configured (it checks against the existence of .config)
268 # otherwise it dies.
269 require_configured_kernel() {
270 if ! linux_config_src_exists; then
271 qeerror "Could not find a usable .config in the kernel source directory."
272 qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources."
273 qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that"
274 qeerror "it points to the necessary object directory so that it might find .config."
275 die "Kernel not configured; no .config found in ${KV_OUT_DIR}"
276 fi
277 }
278
279 # @FUNCTION: linux_chkconfig_present
280 # @USAGE: option
281 # @RETURN: true or false
282 # @DESCRIPTION:
283 # It checks that CONFIG_<option>=y or CONFIG_<option>=m is present in the current kernel .config
284 # If linux_config_exists returns false, the results of this are UNDEFINED. You
285 # MUST call linux_config_exists first.
286 linux_chkconfig_present() {
287 linux_config_qa_check linux_chkconfig_present
288 local RESULT
289 local config
290 config="${KV_OUT_DIR}/.config"
291 [ ! -f "${config}" ] && config="/proc/config.gz"
292 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
293 [ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1
294 }
295
296 # @FUNCTION: linux_chkconfig_module
297 # @USAGE: option
298 # @RETURN: true or false
299 # @DESCRIPTION:
300 # It checks that CONFIG_<option>=m is present in the current kernel .config
301 # If linux_config_exists returns false, the results of this are UNDEFINED. You
302 # MUST call linux_config_exists first.
303 linux_chkconfig_module() {
304 linux_config_qa_check linux_chkconfig_module
305 local RESULT
306 local config
307 config="${KV_OUT_DIR}/.config"
308 [ ! -f "${config}" ] && config="/proc/config.gz"
309 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
310 [ "${RESULT}" = "m" ] && return 0 || return 1
311 }
312
313 # @FUNCTION: linux_chkconfig_builtin
314 # @USAGE: option
315 # @RETURN: true or false
316 # @DESCRIPTION:
317 # It checks that CONFIG_<option>=y is present in the current kernel .config
318 # If linux_config_exists returns false, the results of this are UNDEFINED. You
319 # MUST call linux_config_exists first.
320 linux_chkconfig_builtin() {
321 linux_config_qa_check linux_chkconfig_builtin
322 local RESULT
323 local config
324 config="${KV_OUT_DIR}/.config"
325 [ ! -f "${config}" ] && config="/proc/config.gz"
326 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
327 [ "${RESULT}" = "y" ] && return 0 || return 1
328 }
329
330 # @FUNCTION: linux_chkconfig_string
331 # @USAGE: option
332 # @RETURN: CONFIG_<option>
333 # @DESCRIPTION:
334 # It prints the CONFIG_<option> value of the current kernel .config (it requires a configured kernel).
335 # If linux_config_exists returns false, the results of this are UNDEFINED. You
336 # MUST call linux_config_exists first.
337 linux_chkconfig_string() {
338 linux_config_qa_check linux_chkconfig_string
339 local config
340 config="${KV_OUT_DIR}/.config"
341 [ ! -f "${config}" ] && config="/proc/config.gz"
342 getfilevar_noexec "CONFIG_${1}" "${config}"
343 }
344
345 # Versioning Functions
346 # ---------------------------------------
347
348 # @FUNCTION: kernel_is
349 # @USAGE: [-lt -gt -le -ge -eq] major_number [minor_number patch_number]
350 # @RETURN: true or false
351 # @DESCRIPTION:
352 # It returns true when the current kernel version satisfies the comparison against the passed version.
353 # -eq is the default comparison.
354 #
355 # @CODE
356 # For Example where KV = 2.6.9
357 # kernel_is 2 4 returns false
358 # kernel_is 2 returns true
359 # kernel_is 2 6 returns true
360 # kernel_is 2 6 8 returns false
361 # kernel_is 2 6 9 returns true
362 # @CODE
363
364 # got the jist yet?
365
366 kernel_is() {
367 # if we haven't determined the version yet, we need to.
368 linux-info_get_any_version
369
370 local operator testagainst value x=0 y=0 z=0
371
372 case ${1} in
373 -lt|lt) operator="-lt"; shift;;
374 -gt|gt) operator="-gt"; shift;;
375 -le|le) operator="-le"; shift;;
376 -ge|ge) operator="-ge"; shift;;
377 -eq|eq) operator="-eq"; shift;;
378 *) operator="-eq";;
379 esac
380
381 for x in ${@}; do
382 for((y=0; y<$((3 - ${#x})); y++)); do value="${value}0"; done
383 value="${value}${x}"
384 z=$((${z} + 1))
385
386 case ${z} in
387 1) for((y=0; y<$((3 - ${#KV_MAJOR})); y++)); do testagainst="${testagainst}0"; done;
388 testagainst="${testagainst}${KV_MAJOR}";;
389 2) for((y=0; y<$((3 - ${#KV_MINOR})); y++)); do testagainst="${testagainst}0"; done;
390 testagainst="${testagainst}${KV_MINOR}";;
391 3) for((y=0; y<$((3 - ${#KV_PATCH})); y++)); do testagainst="${testagainst}0"; done;
392 testagainst="${testagainst}${KV_PATCH}";;
393 *) die "Error in kernel-2_kernel_is(): Too many parameters.";;
394 esac
395 done
396
397 [ "${testagainst}" ${operator} "${value}" ] && return 0 || return 1
398 }
399
400 get_localversion() {
401 local lv_list i x
402
403 # ignore files with ~ in it.
404 for i in $(ls ${1}/localversion* 2>/dev/null); do
405 [[ -n ${i//*~*} ]] && lv_list="${lv_list} ${i}"
406 done
407
408 for i in ${lv_list}; do
409 x="${x}$(<${i})"
410 done
411 x=${x/ /}
412 echo ${x}
413 }
414
415 # Check if the Makefile is valid for direct parsing.
416 # Check status results:
417 # - PASS, use 'getfilevar' to extract values
418 # - FAIL, use 'getfilevar_noexec' to extract values
419 # The check may fail if:
420 # - make is not present
421 # - corruption exists in the kernel makefile
422 get_makefile_extract_function() {
423 local a='' b='' mkfunc='getfilevar'
424 a="$(getfilevar VERSION ${KERNEL_MAKEFILE})"
425 b="$(getfilevar_noexec VERSION ${KERNEL_MAKEFILE})"
426 [[ "${a}" != "${b}" ]] && mkfunc='getfilevar_noexec'
427 echo "${mkfunc}"
428 }
429
430 # internal variable, so we know to only print the warning once
431 get_version_warning_done=
432
433 # @FUNCTION: get_version
434 # @DESCRIPTION:
435 # It gets the version of the kernel inside KERNEL_DIR and populates the KV_FULL variable
436 # (if KV_FULL is already set it does nothing).
437 #
438 # The kernel version variables (KV_MAJOR, KV_MINOR, KV_PATCH, KV_EXTRA and KV_LOCAL) are also set.
439 #
440 # The KV_DIR is set using the KERNEL_DIR env var, the KV_DIR_OUT is set using a valid
441 # KBUILD_OUTPUT (in a decreasing priority list, we look for the env var, makefile var or the
442 # symlink /lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build).
443 get_version() {
444 local kbuild_output mkfunc tmplocal
445
446 # no need to execute this twice assuming KV_FULL is populated.
447 # we can force by unsetting KV_FULL
448 [ -n "${KV_FULL}" ] && return 0
449
450 # if we dont know KV_FULL, then we need too.
451 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
452 unset KV_DIR
453
454 # KV_DIR will contain the full path to the sources directory we should use
455 [ -z "${get_version_warning_done}" ] && \
456 qeinfo "Determining the location of the kernel source code"
457 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
458 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
459
460 if [ -z "${KV_DIR}" ]
461 then
462 if [ -z "${get_version_warning_done}" ]; then
463 get_version_warning_done=1
464 qeerror "Unable to find kernel sources at ${KERNEL_DIR}"
465 #qeinfo "This package requires Linux sources."
466 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
467 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
468 qeinfo "(or the kernel you wish to build against)."
469 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
470 else
471 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
472 fi
473 fi
474 return 1
475 fi
476
477 if [ -z "${get_version_warning_done}" ]; then
478 qeinfo "Found kernel source directory:"
479 qeinfo " ${KV_DIR}"
480 fi
481
482 if [ ! -s "${KV_DIR}/Makefile" ]
483 then
484 if [ -z "${get_version_warning_done}" ]; then
485 get_version_warning_done=1
486 qeerror "Could not find a Makefile in the kernel source directory."
487 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
488 fi
489 return 1
490 fi
491
492 # OK so now we know our sources directory, but they might be using
493 # KBUILD_OUTPUT, and we need this for .config and localversions-*
494 # so we better find it eh?
495 # do we pass KBUILD_OUTPUT on the CLI?
496 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}"
497
498 # keep track of it
499 KERNEL_MAKEFILE="${KV_DIR}/Makefile"
500
501 # Decide the function used to extract makefile variables.
502 mkfunc="$(get_makefile_extract_function "${KERNEL_MAKEFILE}")"
503
504 # And if we didn't pass it, we can take a nosey in the Makefile
505 kbuild_output="$(${mkfunc} KBUILD_OUTPUT ${KERNEL_MAKEFILE})"
506 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
507
508 # And contrary to existing functions I feel we shouldn't trust the
509 # directory name to find version information as this seems insane.
510 # so we parse ${KERNEL_MAKEFILE}
511 KV_MAJOR="$(${mkfunc} VERSION ${KERNEL_MAKEFILE})"
512 KV_MINOR="$(${mkfunc} PATCHLEVEL ${KERNEL_MAKEFILE})"
513 KV_PATCH="$(${mkfunc} SUBLEVEL ${KERNEL_MAKEFILE})"
514 KV_EXTRA="$(${mkfunc} EXTRAVERSION ${KERNEL_MAKEFILE})"
515
516 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
517 then
518 if [ -z "${get_version_warning_done}" ]; then
519 get_version_warning_done=1
520 qeerror "Could not detect kernel version."
521 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
522 fi
523 return 1
524 fi
525
526 # and in newer versions we can also pull LOCALVERSION if it is set.
527 # but before we do this, we need to find if we use a different object directory.
528 # This *WILL* break if the user is using localversions, but we assume it was
529 # caught before this if they are.
530 OUTPUT_DIR="${OUTPUT_DIR:-/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build}"
531
532 [ -h "${OUTPUT_DIR}" ] && KV_OUT_DIR="$(readlink -f ${OUTPUT_DIR})"
533 [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
534 if [ -n "${KV_OUT_DIR}" ];
535 then
536 qeinfo "Found kernel object directory:"
537 qeinfo " ${KV_OUT_DIR}"
538 fi
539 # and if we STILL have not got it, then we better just set it to KV_DIR
540 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
541
542 # Grab the kernel release from the output directory.
543 # TODO: we MUST detect kernel.release being out of date, and 'return 1' from
544 # this function.
545 if [ -s "${KV_OUT_DIR}"/include/config/kernel.release ]; then
546 KV_LOCAL=$(<"${KV_OUT_DIR}"/include/config/kernel.release)
547 elif [ -s "${KV_OUT_DIR}"/.kernelrelease ]; then
548 KV_LOCAL=$(<"${KV_OUT_DIR}"/.kernelrelease)
549 else
550 KV_LOCAL=
551 fi
552
553 # KV_LOCAL currently contains the full release; discard the first bits.
554 tmplocal=${KV_LOCAL#${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}}
555
556 # If the updated local version was not changed, the tree is not prepared.
557 # Clear out KV_LOCAL in that case.
558 # TODO: this does not detect a change in the localversion part between
559 # kernel.release and the value that would be generated.
560 if [ "$KV_LOCAL" = "$tmplocal" ]; then
561 KV_LOCAL=
562 else
563 KV_LOCAL=$tmplocal
564 fi
565
566 # And we should set KV_FULL to the full expanded version
567 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
568
569 qeinfo "Found sources for kernel version:"
570 qeinfo " ${KV_FULL}"
571
572 return 0
573 }
574
575 # @FUNCTION: get_running_version
576 # @DESCRIPTION:
577 # It gets the version of the current running kernel and the result is the same as get_version() if the
578 # function can find the sources.
579 get_running_version() {
580 KV_FULL=$(uname -r)
581
582 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile && -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
583 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
584 KBUILD_OUTPUT=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
585 unset KV_FULL
586 get_version
587 return $?
588 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
589 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
590 unset KV_FULL
591 get_version
592 return $?
593 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
594 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
595 unset KV_FULL
596 get_version
597 return $?
598 else
599 KV_MAJOR=$(get_version_component_range 1 ${KV_FULL})
600 KV_MINOR=$(get_version_component_range 2 ${KV_FULL})
601 KV_PATCH=$(get_version_component_range 3 ${KV_FULL})
602 KV_PATCH=${KV_PATCH//-*}
603 KV_EXTRA="${KV_FULL#${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}}"
604 fi
605 return 0
606 }
607
608 # This next function is named with the eclass prefix to avoid conflicts with
609 # some old versionator-like eclass functions.
610
611 # @FUNCTION: linux-info_get_any_version
612 # @DESCRIPTION:
613 # This attempts to find the version of the sources, and otherwise falls back to
614 # the version of the running kernel.
615 linux-info_get_any_version() {
616 get_version
617 if [[ $? -ne 0 ]]; then
618 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
619 get_running_version
620 fi
621 }
622
623
624 # ebuild check functions
625 # ---------------------------------------
626
627 # @FUNCTION: check_kernel_built
628 # @DESCRIPTION:
629 # This function verifies that the current kernel sources have been already prepared otherwise it dies.
630 check_kernel_built() {
631 # if we haven't determined the version yet, we need to
632 require_configured_kernel
633 get_version
634
635 if [ ! -f "${KV_OUT_DIR}/include/linux/version.h" ]
636 then
637 eerror "These sources have not yet been prepared."
638 eerror "We cannot build against an unprepared tree."
639 eerror "To resolve this, please type the following:"
640 eerror
641 eerror "# cd ${KV_DIR}"
642 eerror "# make oldconfig"
643 eerror "# make modules_prepare"
644 eerror
645 eerror "Then please try merging this module again."
646 die "Kernel sources need compiling first"
647 fi
648 }
649
650 # @FUNCTION: check_modules_supported
651 # @DESCRIPTION:
652 # This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
653 check_modules_supported() {
654 # if we haven't determined the version yet, we need too.
655 require_configured_kernel
656 get_version
657
658 if ! linux_chkconfig_builtin "MODULES"
659 then
660 eerror "These sources do not support loading external modules."
661 eerror "to be able to use this module please enable \"Loadable modules support\""
662 eerror "in your kernel, recompile and then try merging this module again."
663 die "No support for external modules in ${KV_FULL} config"
664 fi
665 }
666
667 # @FUNCTION: check_extra_config
668 # @DESCRIPTION:
669 # It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
670 # the prefix ~ is not used) doesn't satisfy the directive.
671 check_extra_config() {
672 local config negate die error reworkmodulenames
673 local soft_errors_count=0 hard_errors_count=0 config_required=0
674 # store the value of the QA check, because otherwise we won't catch usages
675 # after if check_extra_config is called AND other direct calls are done
676 # later.
677 local old_LINUX_CONFIG_EXISTS_DONE="${_LINUX_CONFIG_EXISTS_DONE}"
678
679 # if we haven't determined the version yet, we need to
680 linux-info_get_any_version
681
682 # Determine if we really need a .config. The only time when we don't need
683 # one is when all of the CONFIG_CHECK options are prefixed with "~".
684 for config in ${CONFIG_CHECK}
685 do
686 if [[ "${config:0:1}" != "~" ]]; then
687 config_required=1
688 break
689 fi
690 done
691
692 if [[ ${config_required} == 0 ]]; then
693 # In the case where we don't require a .config, we can now bail out
694 # if the user has no .config as there is nothing to do. Otherwise
695 # code later will cause a failure due to missing .config.
696 if ! linux_config_exists; then
697 ewarn "Unable to check for the following kernel config options due"
698 ewarn "to absence of any configured kernel sources or compiled"
699 ewarn "config:"
700 for config in ${CONFIG_CHECK}; do
701 local_error="ERROR_${config#\~}"
702 msg="${!local_error}"
703 if [[ "x${msg}" == "x" ]]; then
704 local_error="WARNING_${config#\~}"
705 msg="${!local_error}"
706 fi
707 ewarn " - ${config#\~}${msg:+ - }${msg}"
708 done
709 ewarn "You're on your own to make sure they are set if needed."
710 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
711 return 0
712 fi
713 else
714 require_configured_kernel
715 fi
716
717 einfo "Checking for suitable kernel configuration options..."
718
719 for config in ${CONFIG_CHECK}
720 do
721 # if we specify any fatal, ensure we honor them
722 die=1
723 error=0
724 negate=0
725 reworkmodulenames=0
726
727 if [[ ${config:0:1} == "~" ]]; then
728 die=0
729 config=${config:1}
730 elif [[ ${config:0:1} == "@" ]]; then
731 die=0
732 reworkmodulenames=1
733 config=${config:1}
734 fi
735 if [[ ${config:0:1} == "!" ]]; then
736 negate=1
737 config=${config:1}
738 fi
739
740 if [[ ${negate} == 1 ]]; then
741 linux_chkconfig_present ${config} && error=2
742 elif [[ ${reworkmodulenames} == 1 ]]; then
743 local temp_config="${config//*:}" i n
744 config="${config//:*}"
745 if linux_chkconfig_present ${config}; then
746 for i in ${MODULE_NAMES}; do
747 n="${i//${temp_config}}"
748 [[ -z ${n//\(*} ]] && \
749 MODULE_IGNORE="${MODULE_IGNORE} ${temp_config}"
750 done
751 error=2
752 fi
753 else
754 linux_chkconfig_present ${config} || error=1
755 fi
756
757 if [[ ${error} > 0 ]]; then
758 local report_func="eerror" local_error
759 local_error="ERROR_${config}"
760 local_error="${!local_error}"
761
762 if [[ -z "${local_error}" ]]; then
763 # using old, deprecated format.
764 local_error="${config}_ERROR"
765 local_error="${!local_error}"
766 fi
767 if [[ ${die} == 0 && -z "${local_error}" ]]; then
768 #soft errors can be warnings
769 local_error="WARNING_${config}"
770 local_error="${!local_error}"
771 if [[ -n "${local_error}" ]] ; then
772 report_func="ewarn"
773 fi
774 fi
775
776 if [[ -z "${local_error}" ]]; then
777 [[ ${error} == 1 ]] \
778 && local_error="is not set when it should be." \
779 || local_error="should not be set. But it is."
780 local_error="CONFIG_${config}:\t ${local_error}"
781 fi
782 if [[ ${die} == 0 ]]; then
783 ${report_func} " ${local_error}"
784 soft_errors_count=$[soft_errors_count + 1]
785 else
786 ${report_func} " ${local_error}"
787 hard_errors_count=$[hard_errors_count + 1]
788 fi
789 fi
790 done
791
792 if [[ ${hard_errors_count} > 0 ]]; then
793 eerror "Please check to make sure these options are set correctly."
794 eerror "Failure to do so may cause unexpected problems."
795 eerror "Once you have satisfied these options, please try merging"
796 eerror "this package again."
797 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
798 die "Incorrect kernel configuration options"
799 elif [[ ${soft_errors_count} > 0 ]]; then
800 ewarn "Please check to make sure these options are set correctly."
801 ewarn "Failure to do so may cause unexpected problems."
802 else
803 eend 0
804 fi
805 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
806 }
807
808 check_zlibinflate() {
809 # if we haven't determined the version yet, we need to
810 require_configured_kernel
811 get_version
812
813 # although I restructured this code - I really really really dont support it!
814
815 # bug #27882 - zlib routines are only linked into the kernel
816 # if something compiled into the kernel calls them
817 #
818 # plus, for the cloop module, it appears that there's no way
819 # to get cloop.o to include a static zlib if CONFIG_MODVERSIONS
820 # is on
821
822 local INFLATE
823 local DEFLATE
824
825 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
826
827 ebegin "checking ZLIB_INFLATE"
828 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
829 eend $?
830 [ "$?" != 0 ] && die
831
832 ebegin "checking ZLIB_DEFLATE"
833 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
834 eend $?
835 [ "$?" != 0 ] && die
836
837 local LINENO_START
838 local LINENO_END
839 local SYMBOLS
840 local x
841
842 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
843 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
844 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
845 (( LINENO_END = $LINENO_END - 1 ))
846 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
847
848 # okay, now we have a list of symbols
849 # we need to check each one in turn, to see whether it is set or not
850 for x in $SYMBOLS ; do
851 if [ "${!x}" = "y" ]; then
852 # we have a winner!
853 einfo "${x} ensures zlib is linked into your kernel - excellent"
854 return 0
855 fi
856 done
857
858 eerror
859 eerror "This kernel module requires ZLIB library support."
860 eerror "You have enabled zlib support in your kernel, but haven't enabled"
861 eerror "enabled any option that will ensure that zlib is linked into your"
862 eerror "kernel."
863 eerror
864 eerror "Please ensure that you enable at least one of these options:"
865 eerror
866
867 for x in $SYMBOLS ; do
868 eerror " * $x"
869 done
870
871 eerror
872 eerror "Please remember to recompile and install your kernel, and reboot"
873 eerror "into your new kernel before attempting to load this kernel module."
874
875 die "Kernel doesn't include zlib support"
876 }
877
878 ################################
879 # Default pkg_setup
880 # Also used when inheriting linux-mod to force a get_version call
881 # @FUNCTION: linux-info_pkg_setup
882 # @DESCRIPTION:
883 # Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
884 # to support the options specified in CONFIG_CHECK (if not null)
885 linux-info_pkg_setup() {
886 linux-info_get_any_version
887
888 if kernel_is 2 4; then
889 if [ "$( gcc-major-version )" -eq "4" ] ; then
890 echo
891 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"
892 ewarn "linux-2.4 (or modules building against a linux-2.4 kernel)!"
893 echo
894 ewarn "Either switch to another gcc-version (via gcc-config) or use a"
895 ewarn "newer kernel that supports gcc-4."
896 echo
897 ewarn "Also be aware that bugreports about gcc-4 not working"
898 ewarn "with linux-2.4 based ebuilds will be closed as INVALID!"
899 echo
900 epause 10
901 fi
902 fi
903
904 [ -n "${CONFIG_CHECK}" ] && check_extra_config;
905 }

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