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Revision 1.85 - (show annotations) (download)
Tue Aug 3 07:03:39 2010 UTC (4 years ago) by robbat2
Branch: MAIN
Changes since 1.84: +17 -10 lines
Bug #323717: Newer kernels change the build of localversion a lot, so we need to keep up with the times.

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 1.84 2010/06/17 23:46:25 abcd 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 " ${KV_OUT_DIR}"
538 fi
539 # and if we STILL have not got it, then we better just set it to KV_DIR
540 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
541
542 if linux_config_src_exists; then
543 # For things like git that can append extra stuff:
544 # This script is NOT posix-compliant. Running it with 'sh' when 'sh'
545 # is a real POSIX shell causes some breakages (bug #323717).
546 if [ -e ${KV_DIR}/scripts/setlocalversion ] ; then
547 KV_LOCAL="${KV_LOCAL}$(cd ${KV_OUT_DIR} ; bash ${KV_DIR}/scripts/setlocalversion ${KV_DIR})"
548 else
549 # localversion* files
550 KV_LOCAL="${KV_LOCAL}$(get_localversion ${KV_DIR})"
551
552 # CONFIG_LOCALVERSION + LOCALVERSION
553 KV_LOCAL="${KV_LOCAL}$(linux_chkconfig_string LOCALVERSION)${LOCALVERSION}"
554 KV_LOCAL="${KV_LOCAL//\"/}"
555
556 # CONFIG_LOCALVERSION_AUTO logic ???
557 fi
558 else
559 KV_LOCAL="${KV_LOCAL}$(get_localversion ${KV_DIR})"
560 fi
561
562 # And we should set KV_FULL to the full expanded version
563 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
564
565 qeinfo "Found sources for kernel version:"
566 qeinfo " ${KV_FULL}"
567
568 return 0
569 }
570
571 # @FUNCTION: get_running_version
572 # @DESCRIPTION:
573 # It gets the version of the current running kernel and the result is the same as get_version() if the
574 # function can find the sources.
575 get_running_version() {
576 KV_FULL=$(uname -r)
577
578 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile && -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
579 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
580 KBUILD_OUTPUT=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
581 unset KV_FULL
582 get_version
583 return $?
584 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
585 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
586 unset KV_FULL
587 get_version
588 return $?
589 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
590 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
591 unset KV_FULL
592 get_version
593 return $?
594 else
595 KV_MAJOR=$(get_version_component_range 1 ${KV_FULL})
596 KV_MINOR=$(get_version_component_range 2 ${KV_FULL})
597 KV_PATCH=$(get_version_component_range 3- ${KV_FULL})
598 KV_PATCH=${KV_PATCH//-*}
599 [[ -n ${KV_FULL#*-} ]] && [[ -n ${KV_FULL//${KV_FULL#*-}} ]] \
600 && KV_EXTRA="-${KV_FULL#*-}"
601 fi
602 return 0
603 }
604
605 # This next function is named with the eclass prefix to avoid conflicts with
606 # some old versionator-like eclass functions.
607
608 # @FUNCTION: linux-info_get_any_version
609 # @DESCRIPTION:
610 # This attempts to find the version of the sources, and otherwise falls back to
611 # the version of the running kernel.
612 linux-info_get_any_version() {
613 get_version
614 if [[ $? -ne 0 ]]; then
615 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
616 get_running_version
617 fi
618 }
619
620
621 # ebuild check functions
622 # ---------------------------------------
623
624 # @FUNCTION: check_kernel_built
625 # @DESCRIPTION:
626 # This function verifies that the current kernel sources have been already prepared otherwise it dies.
627 check_kernel_built() {
628 # if we haven't determined the version yet, we need to
629 require_configured_kernel
630 get_version
631
632 if [ ! -f "${KV_OUT_DIR}/include/linux/version.h" ]
633 then
634 eerror "These sources have not yet been prepared."
635 eerror "We cannot build against an unprepared tree."
636 eerror "To resolve this, please type the following:"
637 eerror
638 eerror "# cd ${KV_DIR}"
639 eerror "# make oldconfig"
640 eerror "# make modules_prepare"
641 eerror
642 eerror "Then please try merging this module again."
643 die "Kernel sources need compiling first"
644 fi
645 }
646
647 # @FUNCTION: check_modules_supported
648 # @DESCRIPTION:
649 # This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
650 check_modules_supported() {
651 # if we haven't determined the version yet, we need too.
652 require_configured_kernel
653 get_version
654
655 if ! linux_chkconfig_builtin "MODULES"
656 then
657 eerror "These sources do not support loading external modules."
658 eerror "to be able to use this module please enable \"Loadable modules support\""
659 eerror "in your kernel, recompile and then try merging this module again."
660 die "No support for external modules in ${KV_FULL} config"
661 fi
662 }
663
664 # @FUNCTION: check_extra_config
665 # @DESCRIPTION:
666 # It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
667 # the prefix ~ is not used) doesn't satisfy the directive.
668 check_extra_config() {
669 local config negate die error reworkmodulenames
670 local soft_errors_count=0 hard_errors_count=0 config_required=0
671 # store the value of the QA check, because otherwise we won't catch usages
672 # after if check_extra_config is called AND other direct calls are done
673 # later.
674 local old_LINUX_CONFIG_EXISTS_DONE="${_LINUX_CONFIG_EXISTS_DONE}"
675
676 # if we haven't determined the version yet, we need to
677 linux-info_get_any_version
678
679 # Determine if we really need a .config. The only time when we don't need
680 # one is when all of the CONFIG_CHECK options are prefixed with "~".
681 for config in ${CONFIG_CHECK}
682 do
683 if [[ "${config:0:1}" != "~" ]]; then
684 config_required=1
685 break
686 fi
687 done
688
689 if [[ ${config_required} == 0 ]]; then
690 # In the case where we don't require a .config, we can now bail out
691 # if the user has no .config as there is nothing to do. Otherwise
692 # code later will cause a failure due to missing .config.
693 if ! linux_config_exists; then
694 ewarn "Unable to check for the following kernel config options due"
695 ewarn "to absence of any configured kernel sources or compiled"
696 ewarn "config:"
697 for config in ${CONFIG_CHECK}; do
698 local_error="ERROR_${config#\~}"
699 msg="${!local_error}"
700 if [[ "x${msg}" == "x" ]]; then
701 local_error="WARNING_${config#\~}"
702 msg="${!local_error}"
703 fi
704 ewarn " - ${config#\~}${msg:+ - }${msg}"
705 done
706 ewarn "You're on your own to make sure they are set if needed."
707 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
708 return 0
709 fi
710 else
711 require_configured_kernel
712 fi
713
714 einfo "Checking for suitable kernel configuration options..."
715
716 for config in ${CONFIG_CHECK}
717 do
718 # if we specify any fatal, ensure we honor them
719 die=1
720 error=0
721 negate=0
722 reworkmodulenames=0
723
724 if [[ ${config:0:1} == "~" ]]; then
725 die=0
726 config=${config:1}
727 elif [[ ${config:0:1} == "@" ]]; then
728 die=0
729 reworkmodulenames=1
730 config=${config:1}
731 fi
732 if [[ ${config:0:1} == "!" ]]; then
733 negate=1
734 config=${config:1}
735 fi
736
737 if [[ ${negate} == 1 ]]; then
738 linux_chkconfig_present ${config} && error=2
739 elif [[ ${reworkmodulenames} == 1 ]]; then
740 local temp_config="${config//*:}" i n
741 config="${config//:*}"
742 if linux_chkconfig_present ${config}; then
743 for i in ${MODULE_NAMES}; do
744 n="${i//${temp_config}}"
745 [[ -z ${n//\(*} ]] && \
746 MODULE_IGNORE="${MODULE_IGNORE} ${temp_config}"
747 done
748 error=2
749 fi
750 else
751 linux_chkconfig_present ${config} || error=1
752 fi
753
754 if [[ ${error} > 0 ]]; then
755 local report_func="eerror" local_error
756 local_error="ERROR_${config}"
757 local_error="${!local_error}"
758
759 if [[ -z "${local_error}" ]]; then
760 # using old, deprecated format.
761 local_error="${config}_ERROR"
762 local_error="${!local_error}"
763 fi
764 if [[ ${die} == 0 && -z "${local_error}" ]]; then
765 #soft errors can be warnings
766 local_error="WARNING_${config}"
767 local_error="${!local_error}"
768 if [[ -n "${local_error}" ]] ; then
769 report_func="ewarn"
770 fi
771 fi
772
773 if [[ -z "${local_error}" ]]; then
774 [[ ${error} == 1 ]] \
775 && local_error="is not set when it should be." \
776 || local_error="should not be set. But it is."
777 local_error="CONFIG_${config}:\t ${local_error}"
778 fi
779 if [[ ${die} == 0 ]]; then
780 ${report_func} " ${local_error}"
781 soft_errors_count=$[soft_errors_count + 1]
782 else
783 ${report_func} " ${local_error}"
784 hard_errors_count=$[hard_errors_count + 1]
785 fi
786 fi
787 done
788
789 if [[ ${hard_errors_count} > 0 ]]; then
790 eerror "Please check to make sure these options are set correctly."
791 eerror "Failure to do so may cause unexpected problems."
792 eerror "Once you have satisfied these options, please try merging"
793 eerror "this package again."
794 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
795 die "Incorrect kernel configuration options"
796 elif [[ ${soft_errors_count} > 0 ]]; then
797 ewarn "Please check to make sure these options are set correctly."
798 ewarn "Failure to do so may cause unexpected problems."
799 else
800 eend 0
801 fi
802 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
803 }
804
805 check_zlibinflate() {
806 # if we haven't determined the version yet, we need to
807 require_configured_kernel
808 get_version
809
810 # although I restructured this code - I really really really dont support it!
811
812 # bug #27882 - zlib routines are only linked into the kernel
813 # if something compiled into the kernel calls them
814 #
815 # plus, for the cloop module, it appears that there's no way
816 # to get cloop.o to include a static zlib if CONFIG_MODVERSIONS
817 # is on
818
819 local INFLATE
820 local DEFLATE
821
822 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
823
824 ebegin "checking ZLIB_INFLATE"
825 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
826 eend $?
827 [ "$?" != 0 ] && die
828
829 ebegin "checking ZLIB_DEFLATE"
830 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
831 eend $?
832 [ "$?" != 0 ] && die
833
834 local LINENO_START
835 local LINENO_END
836 local SYMBOLS
837 local x
838
839 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
840 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
841 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
842 (( LINENO_END = $LINENO_END - 1 ))
843 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
844
845 # okay, now we have a list of symbols
846 # we need to check each one in turn, to see whether it is set or not
847 for x in $SYMBOLS ; do
848 if [ "${!x}" = "y" ]; then
849 # we have a winner!
850 einfo "${x} ensures zlib is linked into your kernel - excellent"
851 return 0
852 fi
853 done
854
855 eerror
856 eerror "This kernel module requires ZLIB library support."
857 eerror "You have enabled zlib support in your kernel, but haven't enabled"
858 eerror "enabled any option that will ensure that zlib is linked into your"
859 eerror "kernel."
860 eerror
861 eerror "Please ensure that you enable at least one of these options:"
862 eerror
863
864 for x in $SYMBOLS ; do
865 eerror " * $x"
866 done
867
868 eerror
869 eerror "Please remember to recompile and install your kernel, and reboot"
870 eerror "into your new kernel before attempting to load this kernel module."
871
872 die "Kernel doesn't include zlib support"
873 }
874
875 ################################
876 # Default pkg_setup
877 # Also used when inheriting linux-mod to force a get_version call
878 # @FUNCTION: linux-info_pkg_setup
879 # @DESCRIPTION:
880 # Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
881 # to support the options specified in CONFIG_CHECK (if not null)
882 linux-info_pkg_setup() {
883 linux-info_get_any_version
884
885 if kernel_is 2 4; then
886 if [ "$( gcc-major-version )" -eq "4" ] ; then
887 echo
888 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"
889 ewarn "linux-2.4 (or modules building against a linux-2.4 kernel)!"
890 echo
891 ewarn "Either switch to another gcc-version (via gcc-config) or use a"
892 ewarn "newer kernel that supports gcc-4."
893 echo
894 ewarn "Also be aware that bugreports about gcc-4 not working"
895 ewarn "with linux-2.4 based ebuilds will be closed as INVALID!"
896 echo
897 epause 10
898 fi
899 fi
900
901 [ -n "${CONFIG_CHECK}" ] && check_extra_config;
902 }

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