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Revision 1.97 - (show annotations) (download)
Sun Feb 10 02:21:55 2013 UTC (18 months, 3 weeks ago) by vapier
Branch: MAIN
Changes since 1.96: +21 -22 lines
if KV_OUT_DIR is not set, do not let linux_config_src_exists implicitly check /.config #382787 by bay

1 # Copyright 1999-2013 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 1.96 2013/01/24 20:47:23 vapier Exp $
4
5 # @ECLASS: linux-info.eclass
6 # @MAINTAINER:
7 # kernel-misc@gentoo.org
8 # @AUTHOR:
9 # Original author: John Mylchreest <johnm@gentoo.org>
10 # @BLURB: eclass used for accessing kernel related information
11 # @DESCRIPTION:
12 # This eclass is used as a central eclass for accessing kernel
13 # related information for source or binary already installed.
14 # It is vital for linux-mod.eclass to function correctly, and is split
15 # out so that any ebuild behaviour "templates" are abstracted out
16 # using additional eclasses.
17 #
18 # "kernel config" in this file means:
19 # The .config of the currently installed sources is used as the first
20 # preference, with a fall-back to bundled config (/proc/config.gz) if available.
21 #
22 # Before using any of the config-handling functions in this eclass, you must
23 # ensure that one of the following functions has been called (in order of
24 # preference), otherwise you will get bugs like #364041):
25 # linux-info_pkg_setup
26 # linux-info_get_any_version
27 # get_version
28 # get_running_version
29
30 # A Couple of env vars are available to effect usage of this eclass
31 # These are as follows:
32
33 # @ECLASS-VARIABLE: KERNEL_DIR
34 # @DESCRIPTION:
35 # A string containing the directory of the target kernel sources. The default value is
36 # "/usr/src/linux"
37
38 # @ECLASS-VARIABLE: CONFIG_CHECK
39 # @DESCRIPTION:
40 # A string containing a list of .config options to check for before
41 # proceeding with the install.
42 #
43 # e.g.: CONFIG_CHECK="MTRR"
44 #
45 # You can also check that an option doesn't exist by
46 # prepending it with an exclamation mark (!).
47 #
48 # e.g.: CONFIG_CHECK="!MTRR"
49 #
50 # To simply warn about a missing option, prepend a '~'.
51 # It may be combined with '!'.
52 #
53 # In general, most checks should be non-fatal. The only time fatal checks should
54 # be used is for building kernel modules or cases that a compile will fail
55 # without the option.
56 #
57 # This is to allow usage of binary kernels, and minimal systems without kernel
58 # sources.
59
60 # @ECLASS-VARIABLE: ERROR_<CFG>
61 # @DESCRIPTION:
62 # A string containing the error message to display when the check against CONFIG_CHECK
63 # fails. <CFG> should reference the appropriate option used in CONFIG_CHECK.
64 #
65 # e.g.: ERROR_MTRR="MTRR exists in the .config but shouldn't!!"
66
67 # @ECLASS-VARIABLE: KBUILD_OUTPUT
68 # @DESCRIPTION:
69 # A string passed on commandline, or set from the kernel makefile. It contains the directory
70 # which is to be used as the kernel object directory.
71
72 # There are also a couple of variables which are set by this, and shouldn't be
73 # set by hand. These are as follows:
74
75 # @ECLASS-VARIABLE: KV_FULL
76 # @DESCRIPTION:
77 # A read-only variable. It's a string containing the full kernel version. ie: 2.6.9-gentoo-johnm-r1
78
79 # @ECLASS-VARIABLE: KV_MAJOR
80 # @DESCRIPTION:
81 # A read-only variable. It's an integer containing the kernel major version. ie: 2
82
83 # @ECLASS-VARIABLE: KV_MINOR
84 # @DESCRIPTION:
85 # A read-only variable. It's an integer containing the kernel minor version. ie: 6
86
87 # @ECLASS-VARIABLE: KV_PATCH
88 # @DESCRIPTION:
89 # A read-only variable. It's an integer containing the kernel patch version. ie: 9
90
91 # @ECLASS-VARIABLE: KV_EXTRA
92 # @DESCRIPTION:
93 # A read-only variable. It's a string containing the kernel EXTRAVERSION. ie: -gentoo
94
95 # @ECLASS-VARIABLE: KV_LOCAL
96 # @DESCRIPTION:
97 # A read-only variable. It's a string containing the kernel LOCALVERSION concatenation. ie: -johnm
98
99 # @ECLASS-VARIABLE: KV_DIR
100 # @DESCRIPTION:
101 # A read-only variable. It's a string containing the kernel source directory, will be null if
102 # KERNEL_DIR is invalid.
103
104 # @ECLASS-VARIABLE: KV_OUT_DIR
105 # @DESCRIPTION:
106 # A read-only variable. It's a string containing the kernel object directory, will be KV_DIR unless
107 # KBUILD_OUTPUT is used. This should be used for referencing .config.
108
109 # And to ensure all the weirdness with crosscompile
110 inherit toolchain-funcs versionator
111
112 EXPORT_FUNCTIONS pkg_setup
113
114 DEPEND=""
115 RDEPEND=""
116
117 # Overwritable environment Var's
118 # ---------------------------------------
119 KERNEL_DIR="${KERNEL_DIR:-${ROOT}usr/src/linux}"
120
121
122 # Bug fixes
123 # fix to bug #75034
124 case ${ARCH} in
125 ppc) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
126 ppc64) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
127 esac
128
129 # @FUNCTION: set_arch_to_kernel
130 # @DESCRIPTION:
131 # Set the env ARCH to match what the kernel expects.
132 set_arch_to_kernel() { export ARCH=$(tc-arch-kernel); }
133 # @FUNCTION: set_arch_to_portage
134 # @DESCRIPTION:
135 # Set the env ARCH to match what portage expects.
136 set_arch_to_portage() { export ARCH=$(tc-arch); }
137
138 # qeinfo "Message"
139 # -------------------
140 # qeinfo is a quiet einfo call when EBUILD_PHASE
141 # should not have visible output.
142 qout() {
143 local outputmsg type
144 type=${1}
145 shift
146 outputmsg="${@}"
147 case "${EBUILD_PHASE}" in
148 depend) unset outputmsg;;
149 clean) unset outputmsg;;
150 preinst) unset outputmsg;;
151 esac
152 [ -n "${outputmsg}" ] && ${type} "${outputmsg}"
153 }
154
155 qeinfo() { qout einfo "${@}" ; }
156 qewarn() { qout ewarn "${@}" ; }
157 qeerror() { qout eerror "${@}" ; }
158
159 # File Functions
160 # ---------------------------------------
161
162 # @FUNCTION: getfilevar
163 # @USAGE: variable configfile
164 # @RETURN: the value of the variable
165 # @DESCRIPTION:
166 # It detects the value of the variable defined in the file configfile. This is
167 # done by including the configfile, and printing the variable with Make.
168 # It WILL break if your makefile has missing dependencies!
169 getfilevar() {
170 local ERROR basefname basedname myARCH="${ARCH}"
171 ERROR=0
172
173 [ -z "${1}" ] && ERROR=1
174 [ ! -f "${2}" ] && ERROR=1
175
176 if [ "${ERROR}" = 1 ]
177 then
178 echo -e "\n"
179 eerror "getfilevar requires 2 variables, with the second a valid file."
180 eerror " getfilevar <VARIABLE> <CONFIGFILE>"
181 else
182 basefname="$(basename ${2})"
183 basedname="$(dirname ${2})"
184 unset ARCH
185
186 echo -e "e:\\n\\t@echo \$(${1})\\ninclude ${basefname}" | \
187 make -C "${basedname}" M="${S}" ${BUILD_FIXES} -s -f - 2>/dev/null
188
189 ARCH=${myARCH}
190 fi
191 }
192
193 # @FUNCTION: getfilevar_noexec
194 # @USAGE: variable configfile
195 # @RETURN: the value of the variable
196 # @DESCRIPTION:
197 # It detects the value of the variable defined in the file configfile.
198 # This is done with sed matching an expression only. If the variable is defined,
199 # you will run into problems. See getfilevar for those cases.
200 getfilevar_noexec() {
201 local ERROR basefname basedname mycat myARCH="${ARCH}"
202 ERROR=0
203 mycat='cat'
204
205 [ -z "${1}" ] && ERROR=1
206 [ ! -f "${2}" ] && ERROR=1
207 [ "${2%.gz}" != "${2}" ] && mycat='zcat'
208
209 if [ "${ERROR}" = 1 ]
210 then
211 echo -e "\n"
212 eerror "getfilevar_noexec requires 2 variables, with the second a valid file."
213 eerror " getfilevar_noexec <VARIABLE> <CONFIGFILE>"
214 else
215 ${mycat} "${2}" | \
216 sed -n \
217 -e "/^[[:space:]]*${1}[[:space:]]*:\\?=[[:space:]]*\(.*\)\$/{
218 s,^[^=]*[[:space:]]*=[[:space:]]*,,g ;
219 s,[[:space:]]*\$,,g ;
220 p
221 }"
222 fi
223 }
224
225 # @ECLASS-VARIABLE: _LINUX_CONFIG_EXISTS_DONE
226 # @INTERNAL
227 # @DESCRIPTION:
228 # This is only set if one of the linux_config_*exists functions has been called.
229 # We use it for a QA warning that the check for a config has not been performed,
230 # as linux_chkconfig* in non-legacy mode WILL return an undefined value if no
231 # config is available at all.
232 _LINUX_CONFIG_EXISTS_DONE=
233
234 linux_config_qa_check() {
235 local f="$1"
236 if [ -z "${_LINUX_CONFIG_EXISTS_DONE}" ]; then
237 ewarn "QA: You called $f before any linux_config_exists!"
238 ewarn "QA: The return value of $f will NOT guaranteed later!"
239 fi
240 }
241
242 # @FUNCTION: linux_config_src_exists
243 # @RETURN: true or false
244 # @DESCRIPTION:
245 # It returns true if .config exists in a build directory otherwise false
246 linux_config_src_exists() {
247 export _LINUX_CONFIG_EXISTS_DONE=1
248 [[ -n ${KV_OUT_DIR} && -s ${KV_OUT_DIR}/.config ]]
249 }
250
251 # @FUNCTION: linux_config_bin_exists
252 # @RETURN: true or false
253 # @DESCRIPTION:
254 # It returns true if .config exists in /proc, otherwise false
255 linux_config_bin_exists() {
256 export _LINUX_CONFIG_EXISTS_DONE=1
257 [[ -s /proc/config.gz ]]
258 }
259
260 # @FUNCTION: linux_config_exists
261 # @RETURN: true or false
262 # @DESCRIPTION:
263 # It returns true if .config exists otherwise false
264 #
265 # This function MUST be checked before using any of the linux_chkconfig_*
266 # functions.
267 linux_config_exists() {
268 linux_config_src_exists || linux_config_bin_exists
269 }
270
271 # @FUNCTION: linux_config_path
272 # @DESCRIPTION:
273 # Echo the name of the config file to use. If none are found,
274 # then return false.
275 linux_config_path() {
276 if linux_config_src_exists; then
277 echo "${KV_OUT_DIR}/.config"
278 elif linux_config_bin_exists; then
279 echo "/proc/config.gz"
280 else
281 return 1
282 fi
283 }
284
285 # @FUNCTION: require_configured_kernel
286 # @DESCRIPTION:
287 # This function verifies that the current kernel is configured (it checks against the existence of .config)
288 # otherwise it dies.
289 require_configured_kernel() {
290 if ! linux_config_src_exists; then
291 qeerror "Could not find a usable .config in the kernel source directory."
292 qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources."
293 qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that"
294 qeerror "it points to the necessary object directory so that it might find .config."
295 die "Kernel not configured; no .config found in ${KV_OUT_DIR}"
296 fi
297 }
298
299 # @FUNCTION: linux_chkconfig_present
300 # @USAGE: option
301 # @RETURN: true or false
302 # @DESCRIPTION:
303 # It checks that CONFIG_<option>=y or CONFIG_<option>=m is present in the current kernel .config
304 # If linux_config_exists returns false, the results of this are UNDEFINED. You
305 # MUST call linux_config_exists first.
306 linux_chkconfig_present() {
307 linux_config_qa_check linux_chkconfig_present
308 [[ $(getfilevar_noexec "CONFIG_$1" "$(linux_config_path)") == [my] ]]
309 }
310
311 # @FUNCTION: linux_chkconfig_module
312 # @USAGE: option
313 # @RETURN: true or false
314 # @DESCRIPTION:
315 # It checks that CONFIG_<option>=m is present in the current kernel .config
316 # If linux_config_exists returns false, the results of this are UNDEFINED. You
317 # MUST call linux_config_exists first.
318 linux_chkconfig_module() {
319 linux_config_qa_check linux_chkconfig_module
320 [[ $(getfilevar_noexec "CONFIG_$1" "$(linux_config_path)") == m ]]
321 }
322
323 # @FUNCTION: linux_chkconfig_builtin
324 # @USAGE: option
325 # @RETURN: true or false
326 # @DESCRIPTION:
327 # It checks that CONFIG_<option>=y is present in the current kernel .config
328 # If linux_config_exists returns false, the results of this are UNDEFINED. You
329 # MUST call linux_config_exists first.
330 linux_chkconfig_builtin() {
331 linux_config_qa_check linux_chkconfig_builtin
332 [[ $(getfilevar_noexec "CONFIG_$1" "$(linux_config_path)") == y ]]
333 }
334
335 # @FUNCTION: linux_chkconfig_string
336 # @USAGE: option
337 # @RETURN: CONFIG_<option>
338 # @DESCRIPTION:
339 # It prints the CONFIG_<option> value of the current kernel .config (it requires a configured kernel).
340 # If linux_config_exists returns false, the results of this are UNDEFINED. You
341 # MUST call linux_config_exists first.
342 linux_chkconfig_string() {
343 linux_config_qa_check linux_chkconfig_string
344 getfilevar_noexec "CONFIG_$1" "$(linux_config_path)"
345 }
346
347 # Versioning Functions
348 # ---------------------------------------
349
350 # @FUNCTION: kernel_is
351 # @USAGE: [-lt -gt -le -ge -eq] major_number [minor_number patch_number]
352 # @RETURN: true or false
353 # @DESCRIPTION:
354 # It returns true when the current kernel version satisfies the comparison against the passed version.
355 # -eq is the default comparison.
356 #
357 # @CODE
358 # For Example where KV = 2.6.9
359 # kernel_is 2 4 returns false
360 # kernel_is 2 returns true
361 # kernel_is 2 6 returns true
362 # kernel_is 2 6 8 returns false
363 # kernel_is 2 6 9 returns true
364 # @CODE
365
366 # Note: duplicated in kernel-2.eclass
367 kernel_is() {
368 # if we haven't determined the version yet, we need to.
369 linux-info_get_any_version
370
371 # Now we can continue
372 local operator test value
373
374 case ${1#-} in
375 lt) operator="-lt"; shift;;
376 gt) operator="-gt"; shift;;
377 le) operator="-le"; shift;;
378 ge) operator="-ge"; shift;;
379 eq) operator="-eq"; shift;;
380 *) operator="-eq";;
381 esac
382 [[ $# -gt 3 ]] && die "Error in kernel-2_kernel_is(): too many parameters"
383
384 : $(( test = (KV_MAJOR << 16) + (KV_MINOR << 8) + KV_PATCH ))
385 : $(( value = (${1:-${KV_MAJOR}} << 16) + (${2:-${KV_MINOR}} << 8) + ${3:-${KV_PATCH}} ))
386 [ ${test} ${operator} ${value} ]
387 }
388
389 get_localversion() {
390 local lv_list i x
391
392 # ignore files with ~ in it.
393 for i in $(ls ${1}/localversion* 2>/dev/null); do
394 [[ -n ${i//*~*} ]] && lv_list="${lv_list} ${i}"
395 done
396
397 for i in ${lv_list}; do
398 x="${x}$(<${i})"
399 done
400 x=${x/ /}
401 echo ${x}
402 }
403
404 # Check if the Makefile is valid for direct parsing.
405 # Check status results:
406 # - PASS, use 'getfilevar' to extract values
407 # - FAIL, use 'getfilevar_noexec' to extract values
408 # The check may fail if:
409 # - make is not present
410 # - corruption exists in the kernel makefile
411 get_makefile_extract_function() {
412 local a='' b='' mkfunc='getfilevar'
413 a="$(getfilevar VERSION ${KERNEL_MAKEFILE})"
414 b="$(getfilevar_noexec VERSION ${KERNEL_MAKEFILE})"
415 [[ "${a}" != "${b}" ]] && mkfunc='getfilevar_noexec'
416 echo "${mkfunc}"
417 }
418
419 # internal variable, so we know to only print the warning once
420 get_version_warning_done=
421
422 # @FUNCTION: get_version
423 # @DESCRIPTION:
424 # It gets the version of the kernel inside KERNEL_DIR and populates the KV_FULL variable
425 # (if KV_FULL is already set it does nothing).
426 #
427 # The kernel version variables (KV_MAJOR, KV_MINOR, KV_PATCH, KV_EXTRA and KV_LOCAL) are also set.
428 #
429 # The KV_DIR is set using the KERNEL_DIR env var, the KV_DIR_OUT is set using a valid
430 # KBUILD_OUTPUT (in a decreasing priority list, we look for the env var, makefile var or the
431 # symlink /lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build).
432 get_version() {
433 local kbuild_output mkfunc tmplocal
434
435 # no need to execute this twice assuming KV_FULL is populated.
436 # we can force by unsetting KV_FULL
437 [ -n "${KV_FULL}" ] && return 0
438
439 # if we dont know KV_FULL, then we need too.
440 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
441 unset KV_DIR
442
443 # KV_DIR will contain the full path to the sources directory we should use
444 [ -z "${get_version_warning_done}" ] && \
445 qeinfo "Determining the location of the kernel source code"
446 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
447 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
448
449 if [ -z "${KV_DIR}" ]
450 then
451 if [ -z "${get_version_warning_done}" ]; then
452 get_version_warning_done=1
453 qeerror "Unable to find kernel sources at ${KERNEL_DIR}"
454 #qeinfo "This package requires Linux sources."
455 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
456 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
457 qeinfo "(or the kernel you wish to build against)."
458 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
459 else
460 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
461 fi
462 fi
463 return 1
464 fi
465
466 if [ -z "${get_version_warning_done}" ]; then
467 qeinfo "Found kernel source directory:"
468 qeinfo " ${KV_DIR}"
469 fi
470
471 if [ ! -s "${KV_DIR}/Makefile" ]
472 then
473 if [ -z "${get_version_warning_done}" ]; then
474 get_version_warning_done=1
475 qeerror "Could not find a Makefile in the kernel source directory."
476 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
477 fi
478 return 1
479 fi
480
481 # OK so now we know our sources directory, but they might be using
482 # KBUILD_OUTPUT, and we need this for .config and localversions-*
483 # so we better find it eh?
484 # do we pass KBUILD_OUTPUT on the CLI?
485 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}"
486
487 # keep track of it
488 KERNEL_MAKEFILE="${KV_DIR}/Makefile"
489
490 # Decide the function used to extract makefile variables.
491 mkfunc="$(get_makefile_extract_function "${KERNEL_MAKEFILE}")"
492
493 # And if we didn't pass it, we can take a nosey in the Makefile
494 kbuild_output="$(${mkfunc} KBUILD_OUTPUT ${KERNEL_MAKEFILE})"
495 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
496
497 # And contrary to existing functions I feel we shouldn't trust the
498 # directory name to find version information as this seems insane.
499 # so we parse ${KERNEL_MAKEFILE}
500 KV_MAJOR="$(${mkfunc} VERSION ${KERNEL_MAKEFILE})"
501 KV_MINOR="$(${mkfunc} PATCHLEVEL ${KERNEL_MAKEFILE})"
502 KV_PATCH="$(${mkfunc} SUBLEVEL ${KERNEL_MAKEFILE})"
503 KV_EXTRA="$(${mkfunc} EXTRAVERSION ${KERNEL_MAKEFILE})"
504
505 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
506 then
507 if [ -z "${get_version_warning_done}" ]; then
508 get_version_warning_done=1
509 qeerror "Could not detect kernel version."
510 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
511 fi
512 return 1
513 fi
514
515 # and in newer versions we can also pull LOCALVERSION if it is set.
516 # but before we do this, we need to find if we use a different object directory.
517 # This *WILL* break if the user is using localversions, but we assume it was
518 # caught before this if they are.
519 OUTPUT_DIR="${OUTPUT_DIR:-/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build}"
520
521 [ -h "${OUTPUT_DIR}" ] && KV_OUT_DIR="$(readlink -f ${OUTPUT_DIR})"
522 [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
523 if [ -n "${KV_OUT_DIR}" ];
524 then
525 qeinfo "Found kernel object directory:"
526 qeinfo " ${KV_OUT_DIR}"
527 fi
528 # and if we STILL have not got it, then we better just set it to KV_DIR
529 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
530
531 # Grab the kernel release from the output directory.
532 # TODO: we MUST detect kernel.release being out of date, and 'return 1' from
533 # this function.
534 if [ -s "${KV_OUT_DIR}"/include/config/kernel.release ]; then
535 KV_LOCAL=$(<"${KV_OUT_DIR}"/include/config/kernel.release)
536 elif [ -s "${KV_OUT_DIR}"/.kernelrelease ]; then
537 KV_LOCAL=$(<"${KV_OUT_DIR}"/.kernelrelease)
538 else
539 KV_LOCAL=
540 fi
541
542 # KV_LOCAL currently contains the full release; discard the first bits.
543 tmplocal=${KV_LOCAL#${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}}
544
545 # If the updated local version was not changed, the tree is not prepared.
546 # Clear out KV_LOCAL in that case.
547 # TODO: this does not detect a change in the localversion part between
548 # kernel.release and the value that would be generated.
549 if [ "$KV_LOCAL" = "$tmplocal" ]; then
550 KV_LOCAL=
551 else
552 KV_LOCAL=$tmplocal
553 fi
554
555 # And we should set KV_FULL to the full expanded version
556 KV_FULL="${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 && -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
572 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
573 KBUILD_OUTPUT=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
574 unset KV_FULL
575 get_version
576 return $?
577 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
578 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
579 unset KV_FULL
580 get_version
581 return $?
582 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
583 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
584 unset KV_FULL
585 get_version
586 return $?
587 else
588 # This handles a variety of weird kernel versions. Make sure to update
589 # tests/linux-info:get_running_version.sh if you want to change this.
590 local kv_full=${KV_FULL//[-+_]*}
591 KV_MAJOR=$(get_version_component_range 1 ${kv_full})
592 KV_MINOR=$(get_version_component_range 2 ${kv_full})
593 KV_PATCH=$(get_version_component_range 3 ${kv_full})
594 KV_EXTRA="${KV_FULL#${KV_MAJOR}.${KV_MINOR}${KV_PATCH:+.${KV_PATCH}}}"
595 : ${KV_PATCH:=0}
596 fi
597 return 0
598 }
599
600 # This next function is named with the eclass prefix to avoid conflicts with
601 # some old versionator-like eclass functions.
602
603 # @FUNCTION: linux-info_get_any_version
604 # @DESCRIPTION:
605 # This attempts to find the version of the sources, and otherwise falls back to
606 # the version of the running kernel.
607 linux-info_get_any_version() {
608 get_version
609 if [[ $? -ne 0 ]]; then
610 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
611 get_running_version
612 fi
613 }
614
615
616 # ebuild check functions
617 # ---------------------------------------
618
619 # @FUNCTION: check_kernel_built
620 # @DESCRIPTION:
621 # This function verifies that the current kernel sources have been already prepared otherwise it dies.
622 check_kernel_built() {
623 # if we haven't determined the version yet, we need to
624 require_configured_kernel
625 get_version
626
627 local versionh_path
628 if kernel_is -ge 3 7; then
629 versionh_path="include/generated/uapi/linux/version.h"
630 else
631 versionh_path="include/linux/version.h"
632 fi
633
634 if [ ! -f "${KV_OUT_DIR}/${versionh_path}" ]
635 then
636 eerror "These sources have not yet been prepared."
637 eerror "We cannot build against an unprepared tree."
638 eerror "To resolve this, please type the following:"
639 eerror
640 eerror "# cd ${KV_DIR}"
641 eerror "# make oldconfig"
642 eerror "# make modules_prepare"
643 eerror
644 eerror "Then please try merging this module again."
645 die "Kernel sources need compiling first"
646 fi
647 }
648
649 # @FUNCTION: check_modules_supported
650 # @DESCRIPTION:
651 # This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
652 check_modules_supported() {
653 # if we haven't determined the version yet, we need too.
654 require_configured_kernel
655 get_version
656
657 if ! linux_chkconfig_builtin "MODULES"; then
658 eerror "These sources do not support loading external modules."
659 eerror "to be able to use this module please enable \"Loadable modules support\""
660 eerror "in your kernel, recompile and then try merging this module again."
661 die "No support for external modules in ${KV_FULL} config"
662 fi
663 }
664
665 # @FUNCTION: check_extra_config
666 # @DESCRIPTION:
667 # It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
668 # the prefix ~ is not used) doesn't satisfy the directive.
669 check_extra_config() {
670 local config negate die error reworkmodulenames
671 local soft_errors_count=0 hard_errors_count=0 config_required=0
672 # store the value of the QA check, because otherwise we won't catch usages
673 # after if check_extra_config is called AND other direct calls are done
674 # later.
675 local old_LINUX_CONFIG_EXISTS_DONE="${_LINUX_CONFIG_EXISTS_DONE}"
676
677 # if we haven't determined the version yet, we need to
678 linux-info_get_any_version
679
680 # Determine if we really need a .config. The only time when we don't need
681 # one is when all of the CONFIG_CHECK options are prefixed with "~".
682 for config in ${CONFIG_CHECK}; do
683 if [[ "${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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