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Revision 1.83 - (show annotations) (download)
Sun Jan 17 21:46:55 2010 UTC (4 years, 5 months ago) by robbat2
Branch: MAIN
Changes since 1.82: +20 -14 lines
Factor out the function used to validate the makefile for the extraction method.

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 1.82 2010/01/17 21:34:52 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 # 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 $f will NOT gaurenteed later!"
233 fi
234 }
235
236 # @FUNCTION: linux_config_src_exists
237 # @RETURN: true or false
238 # @DESCRIPTION:
239 # It returns true if .config exists in a build directory otherwise false
240 linux_config_src_exists() {
241 export _LINUX_CONFIG_EXISTS_DONE=1
242 [ -s "${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
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 " ${KV_OUT_DIR}"
538
539 KV_LOCAL="$(get_localversion ${KV_OUT_DIR})"
540 fi
541 # and if we STILL have not got it, then we better just set it to KV_DIR
542 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
543
544 KV_LOCAL="${KV_LOCAL}$(get_localversion ${KV_DIR})"
545 if linux_config_src_exists; then
546 KV_LOCAL="${KV_LOCAL}$(linux_chkconfig_string LOCALVERSION)"
547 KV_LOCAL="${KV_LOCAL//\"/}"
548
549 # For things like git that can append extra stuff:
550 [ -e ${KV_DIR}/scripts/setlocalversion ] &&
551 linux_chkconfig_builtin LOCALVERSION_AUTO &&
552 KV_LOCAL="${KV_LOCAL}$(sh ${KV_DIR}/scripts/setlocalversion ${KV_DIR})"
553 fi
554
555 # And we should set KV_FULL to the full expanded version
556 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
557
558 qeinfo "Found sources for kernel version:"
559 qeinfo " ${KV_FULL}"
560
561 return 0
562 }
563
564 # @FUNCTION: get_running_version
565 # @DESCRIPTION:
566 # It gets the version of the current running kernel and the result is the same as get_version() if the
567 # function can find the sources.
568 get_running_version() {
569 KV_FULL=$(uname -r)
570
571 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
572 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
573 unset KV_FULL
574 get_version
575 return $?
576 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
577 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
578 unset KV_FULL
579 get_version
580 return $?
581 else
582 KV_MAJOR=$(get_version_component_range 1 ${KV_FULL})
583 KV_MINOR=$(get_version_component_range 2 ${KV_FULL})
584 KV_PATCH=$(get_version_component_range 3- ${KV_FULL})
585 KV_PATCH=${KV_PATCH//-*}
586 [[ -n ${KV_FULL#*-} ]] && [[ -n ${KV_FULL//${KV_FULL#*-}} ]] \
587 && KV_EXTRA="-${KV_FULL#*-}"
588 fi
589 return 0
590 }
591
592 # This next function is named with the eclass prefix to avoid conflicts with
593 # some old versionator-like eclass functions.
594
595 # @FUNCTION: linux-info_get_any_version
596 # @DESCRIPTION:
597 # This attempts to find the version of the sources, and otherwise falls back to
598 # the version of the running kernel.
599 linux-info_get_any_version() {
600 get_version
601 if [[ $? -ne 0 ]]; then
602 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
603 get_running_version
604 fi
605 }
606
607
608 # ebuild check functions
609 # ---------------------------------------
610
611 # @FUNCTION: check_kernel_built
612 # @DESCRIPTION:
613 # This function verifies that the current kernel sources have been already prepared otherwise it dies.
614 check_kernel_built() {
615 # if we haven't determined the version yet, we need to
616 require_configured_kernel
617 get_version
618
619 if [ ! -f "${KV_OUT_DIR}/include/linux/version.h" ]
620 then
621 eerror "These sources have not yet been prepared."
622 eerror "We cannot build against an unprepared tree."
623 eerror "To resolve this, please type the following:"
624 eerror
625 eerror "# cd ${KV_DIR}"
626 eerror "# make oldconfig"
627 eerror "# make modules_prepare"
628 eerror
629 eerror "Then please try merging this module again."
630 die "Kernel sources need compiling first"
631 fi
632 }
633
634 # @FUNCTION: check_modules_supported
635 # @DESCRIPTION:
636 # This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
637 check_modules_supported() {
638 # if we haven't determined the version yet, we need too.
639 require_configured_kernel
640 get_version
641
642 if ! linux_chkconfig_builtin "MODULES"
643 then
644 eerror "These sources do not support loading external modules."
645 eerror "to be able to use this module please enable \"Loadable modules support\""
646 eerror "in your kernel, recompile and then try merging this module again."
647 die "No support for external modules in ${KV_FULL} config"
648 fi
649 }
650
651 # @FUNCTION: check_extra_config
652 # @DESCRIPTION:
653 # It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
654 # the prefix ~ is not used) doesn't satisfy the directive.
655 check_extra_config() {
656 local config negate die error reworkmodulenames
657 local soft_errors_count=0 hard_errors_count=0 config_required=0
658 # store the value of the QA check, because otherwise we won't catch usages
659 # after if check_extra_config is called AND other direct calls are done
660 # later.
661 local old_LINUX_CONFIG_EXISTS_DONE="${_LINUX_CONFIG_EXISTS_DONE}"
662
663 # if we haven't determined the version yet, we need to
664 linux-info_get_any_version
665
666 # Determine if we really need a .config. The only time when we don't need
667 # one is when all of the CONFIG_CHECK options are prefixed with "~".
668 for config in ${CONFIG_CHECK}
669 do
670 if [[ "${config:0:1}" != "~" ]]; then
671 config_required=1
672 break
673 fi
674 done
675
676 if [[ ${config_required} == 0 ]]; then
677 # In the case where we don't require a .config, we can now bail out
678 # if the user has no .config as there is nothing to do. Otherwise
679 # code later will cause a failure due to missing .config.
680 if ! linux_config_exists; then
681 ewarn "Unable to check for the following kernel config options due"
682 ewarn "to absence of any configured kernel sources or compiled"
683 ewarn "config:"
684 for config in ${CONFIG_CHECK}; do
685 local_error="ERROR_${config#\~}"
686 msg="${!local_error}"
687 if [[ "x${msg}" == "x" ]]; then
688 local_error="WARNING_${config#\~}"
689 msg="${!local_error}"
690 fi
691 ewarn " - ${config#\~}${msg:+ - }${msg}"
692 done
693 ewarn "You're on your own to make sure they are set if needed."
694 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
695 return 0
696 fi
697 else
698 require_configured_kernel
699 fi
700
701 einfo "Checking for suitable kernel configuration options..."
702
703 for config in ${CONFIG_CHECK}
704 do
705 # if we specify any fatal, ensure we honor them
706 die=1
707 error=0
708 negate=0
709 reworkmodulenames=0
710
711 if [[ ${config:0:1} == "~" ]]; then
712 die=0
713 config=${config:1}
714 elif [[ ${config:0:1} == "@" ]]; then
715 die=0
716 reworkmodulenames=1
717 config=${config:1}
718 fi
719 if [[ ${config:0:1} == "!" ]]; then
720 negate=1
721 config=${config:1}
722 fi
723
724 if [[ ${negate} == 1 ]]; then
725 linux_chkconfig_present ${config} && error=2
726 elif [[ ${reworkmodulenames} == 1 ]]; then
727 local temp_config="${config//*:}" i n
728 config="${config//:*}"
729 if linux_chkconfig_present ${config}; then
730 for i in ${MODULE_NAMES}; do
731 n="${i//${temp_config}}"
732 [[ -z ${n//\(*} ]] && \
733 MODULE_IGNORE="${MODULE_IGNORE} ${temp_config}"
734 done
735 error=2
736 fi
737 else
738 linux_chkconfig_present ${config} || error=1
739 fi
740
741 if [[ ${error} > 0 ]]; then
742 local report_func="eerror" local_error
743 local_error="ERROR_${config}"
744 local_error="${!local_error}"
745
746 if [[ -z "${local_error}" ]]; then
747 # using old, deprecated format.
748 local_error="${config}_ERROR"
749 local_error="${!local_error}"
750 fi
751 if [[ ${die} == 0 && -z "${local_error}" ]]; then
752 #soft errors can be warnings
753 local_error="WARNING_${config}"
754 local_error="${!local_error}"
755 if [[ -n "${local_error}" ]] ; then
756 report_func="ewarn"
757 fi
758 fi
759
760 if [[ -z "${local_error}" ]]; then
761 [[ ${error} == 1 ]] \
762 && local_error="is not set when it should be." \
763 || local_error="should not be set. But it is."
764 local_error="CONFIG_${config}:\t ${local_error}"
765 fi
766 if [[ ${die} == 0 ]]; then
767 ${report_func} " ${local_error}"
768 soft_errors_count=$[soft_errors_count + 1]
769 else
770 ${report_func} " ${local_error}"
771 hard_errors_count=$[hard_errors_count + 1]
772 fi
773 fi
774 done
775
776 if [[ ${hard_errors_count} > 0 ]]; then
777 eerror "Please check to make sure these options are set correctly."
778 eerror "Failure to do so may cause unexpected problems."
779 eerror "Once you have satisfied these options, please try merging"
780 eerror "this package again."
781 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
782 die "Incorrect kernel configuration options"
783 elif [[ ${soft_errors_count} > 0 ]]; then
784 ewarn "Please check to make sure these options are set correctly."
785 ewarn "Failure to do so may cause unexpected problems."
786 else
787 eend 0
788 fi
789 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
790 }
791
792 check_zlibinflate() {
793 # if we haven't determined the version yet, we need to
794 require_configured_kernel
795 get_version
796
797 # although I restructured this code - I really really really dont support it!
798
799 # bug #27882 - zlib routines are only linked into the kernel
800 # if something compiled into the kernel calls them
801 #
802 # plus, for the cloop module, it appears that there's no way
803 # to get cloop.o to include a static zlib if CONFIG_MODVERSIONS
804 # is on
805
806 local INFLATE
807 local DEFLATE
808
809 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
810
811 ebegin "checking ZLIB_INFLATE"
812 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
813 eend $?
814 [ "$?" != 0 ] && die
815
816 ebegin "checking ZLIB_DEFLATE"
817 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
818 eend $?
819 [ "$?" != 0 ] && die
820
821 local LINENO_START
822 local LINENO_END
823 local SYMBOLS
824 local x
825
826 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
827 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
828 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
829 (( LINENO_END = $LINENO_END - 1 ))
830 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
831
832 # okay, now we have a list of symbols
833 # we need to check each one in turn, to see whether it is set or not
834 for x in $SYMBOLS ; do
835 if [ "${!x}" = "y" ]; then
836 # we have a winner!
837 einfo "${x} ensures zlib is linked into your kernel - excellent"
838 return 0
839 fi
840 done
841
842 eerror
843 eerror "This kernel module requires ZLIB library support."
844 eerror "You have enabled zlib support in your kernel, but haven't enabled"
845 eerror "enabled any option that will ensure that zlib is linked into your"
846 eerror "kernel."
847 eerror
848 eerror "Please ensure that you enable at least one of these options:"
849 eerror
850
851 for x in $SYMBOLS ; do
852 eerror " * $x"
853 done
854
855 eerror
856 eerror "Please remember to recompile and install your kernel, and reboot"
857 eerror "into your new kernel before attempting to load this kernel module."
858
859 die "Kernel doesn't include zlib support"
860 }
861
862 ################################
863 # Default pkg_setup
864 # Also used when inheriting linux-mod to force a get_version call
865 # @FUNCTION: linux-info_pkg_setup
866 # @DESCRIPTION:
867 # Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
868 # to support the options specified in CONFIG_CHECK (if not null)
869 linux-info_pkg_setup() {
870 linux-info_get_any_version
871
872 if kernel_is 2 4; then
873 if [ "$( gcc-major-version )" -eq "4" ] ; then
874 echo
875 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"
876 ewarn "linux-2.4 (or modules building against a linux-2.4 kernel)!"
877 echo
878 ewarn "Either switch to another gcc-version (via gcc-config) or use a"
879 ewarn "newer kernel that supports gcc-4."
880 echo
881 ewarn "Also be aware that bugreports about gcc-4 not working"
882 ewarn "with linux-2.4 based ebuilds will be closed as INVALID!"
883 echo
884 epause 10
885 fi
886 fi
887
888 [ -n "${CONFIG_CHECK}" ] && check_extra_config;
889 }

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