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Revision 1.78 - (show annotations) (download)
Sun Jan 10 08:47:01 2010 UTC (4 years, 6 months ago) by robbat2
Branch: MAIN
Changes since 1.77: +22 -7 lines
Bug #300306, #167385: One side effect of the non-exec check version for the kernel makefile is that it did not pick up appends, breaking builds on some patched kernels. Try the exec version first now, with a fallback.

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 1.77 2010/01/10 08:25:55 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 # @ECLASS-VARIABLE: I_KNOW_WHAT_I_AM_DOING
105 # @DESCRIPTION:
106 # Temporary variable for the migration to making linux-info non-fatal.
107
108 # And to ensure all the weirdness with crosscompile
109 inherit toolchain-funcs versionator
110
111 EXPORT_FUNCTIONS pkg_setup
112
113 DEPEND=""
114 RDEPEND=""
115
116 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && \
117 DEPEND="kernel_linux? ( virtual/linux-sources )"
118
119 # Overwritable environment Var's
120 # ---------------------------------------
121 KERNEL_DIR="${KERNEL_DIR:-${ROOT}usr/src/linux}"
122
123
124 # Bug fixes
125 # fix to bug #75034
126 case ${ARCH} in
127 ppc) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
128 ppc64) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
129 esac
130
131 # @FUNCTION: set_arch_to_kernel
132 # @DESCRIPTION:
133 # Set the env ARCH to match what the kernel expects.
134 set_arch_to_kernel() { export ARCH=$(tc-arch-kernel); }
135 # @FUNCTION: set_arch_to_portage
136 # @DESCRIPTION:
137 # Set the env ARCH to match what portage expects.
138 set_arch_to_portage() { export ARCH=$(tc-arch); }
139
140 # qeinfo "Message"
141 # -------------------
142 # qeinfo is a quiet einfo call when EBUILD_PHASE
143 # should not have visible output.
144 qout() {
145 local outputmsg type
146 type=${1}
147 shift
148 outputmsg="${@}"
149 case "${EBUILD_PHASE}" in
150 depend) unset outputmsg;;
151 clean) unset outputmsg;;
152 preinst) unset outputmsg;;
153 esac
154 [ -n "${outputmsg}" ] && ${type} "${outputmsg}"
155 }
156
157 qeinfo() { qout einfo "${@}" ; }
158 qeerror() { qout eerror "${@}" ; }
159
160 # File Functions
161 # ---------------------------------------
162
163 # @FUNCTION: getfilevar
164 # @USAGE: variable configfile
165 # @RETURN: the value of the variable
166 # @DESCRIPTION:
167 # It detects the value of the variable defined in the file configfile. This is
168 # done by including the configfile, and printing the variable with Make.
169 # It WILL break if your makefile has missing dependencies!
170 getfilevar() {
171 local ERROR basefname basedname myARCH="${ARCH}"
172 ERROR=0
173
174 [ -z "${1}" ] && ERROR=1
175 [ ! -f "${2}" ] && ERROR=1
176
177 if [ "${ERROR}" = 1 ]
178 then
179 echo -e "\n"
180 eerror "getfilevar requires 2 variables, with the second a valid file."
181 eerror " getfilevar <VARIABLE> <CONFIGFILE>"
182 else
183 basefname="$(basename ${2})"
184 basedname="$(dirname ${2})"
185 unset ARCH
186
187 echo -e "e:\\n\\t@echo \$(${1})\\ninclude ${basefname}" | \
188 make -C "${basedname}" M="${S}" ${BUILD_FIXES} -s -f - 2>/dev/null
189
190 ARCH=${myARCH}
191 fi
192 }
193
194 # @FUNCTION: getfilevar_noexec
195 # @USAGE: variable configfile
196 # @RETURN: the value of the variable
197 # @DESCRIPTION:
198 # It detects the value of the variable defined in the file configfile.
199 # This is done with sed matching an expression only. If the variable is defined,
200 # you will run into problems. See getfilevar for those cases.
201 getfilevar_noexec() {
202 local ERROR basefname basedname mycat myARCH="${ARCH}"
203 ERROR=0
204 mycat='cat'
205
206 [ -z "${1}" ] && ERROR=1
207 [ ! -f "${2}" ] && ERROR=1
208 [ "${2%.gz}" != "${2}" ] && mycat='zcat'
209
210 if [ "${ERROR}" = 1 ]
211 then
212 echo -e "\n"
213 eerror "getfilevar_noexec requires 2 variables, with the second a valid file."
214 eerror " getfilevar_noexec <VARIABLE> <CONFIGFILE>"
215 else
216 ${mycat} "${2}" | \
217 sed -n \
218 -e "/^[[:space:]]*${1}[[:space:]]*=[[:space:]]*\(.*\)\$/{
219 s,^[^=]*[[:space:]]*=[[:space:]]*,,g ;
220 s,[[:space:]]*\$,,g ;
221 p
222 }"
223 fi
224 }
225
226 # @PRIVATE-VARIABLE: _LINUX_CONFIG_EXISTS_DONE
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 $f will NOT gaurenteed later!"
239 fi
240 }
241
242 # @FUNCTION: linux_config_src_exists
243 # @RETURN: true or false
244 # @DESCRIPTION:
245 # It returns true if .config exists in a build directory otherwise false
246 linux_config_src_exists() {
247 export _LINUX_CONFIG_EXISTS_DONE=1
248 [ -s "${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 [ -n "${I_KNOW_WHAT_I_AM_DOING}" -a -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: require_configured_kernel
272 # @DESCRIPTION:
273 # This function verifies that the current kernel is configured (it checks against the existence of .config)
274 # otherwise it dies.
275 require_configured_kernel() {
276 if ! linux_config_src_exists; then
277 qeerror "Could not find a usable .config in the kernel source directory."
278 qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources."
279 qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that"
280 qeerror "it points to the necessary object directory so that it might find .config."
281 die "Kernel not configured; no .config found in ${KV_OUT_DIR}"
282 fi
283 }
284
285 # @FUNCTION: linux_chkconfig_present
286 # @USAGE: option
287 # @RETURN: true or false
288 # @DESCRIPTION:
289 # It checks that CONFIG_<option>=y or CONFIG_<option>=m is present in the current kernel .config
290 # If linux_config_exists returns false, the results of this are UNDEFINED. You
291 # MUST call linux_config_exists first.
292 linux_chkconfig_present() {
293 linux_config_qa_check linux_chkconfig_present
294 local RESULT
295 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
296 local config
297 config="${KV_OUT_DIR}/.config"
298 [ ! -f "${config}" ] && config="/proc/config.gz"
299 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
300 [ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1
301 }
302
303 # @FUNCTION: linux_chkconfig_module
304 # @USAGE: option
305 # @RETURN: true or false
306 # @DESCRIPTION:
307 # It checks that CONFIG_<option>=m is present in the current kernel .config
308 # If linux_config_exists returns false, the results of this are UNDEFINED. You
309 # MUST call linux_config_exists first.
310 linux_chkconfig_module() {
311 linux_config_qa_check linux_chkconfig_module
312 local RESULT
313 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
314 local config
315 config="${KV_OUT_DIR}/.config"
316 [ ! -f "${config}" ] && config="/proc/config.gz"
317 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
318 [ "${RESULT}" = "m" ] && return 0 || return 1
319 }
320
321 # @FUNCTION: linux_chkconfig_builtin
322 # @USAGE: option
323 # @RETURN: true or false
324 # @DESCRIPTION:
325 # It checks that CONFIG_<option>=y is present in the current kernel .config
326 # If linux_config_exists returns false, the results of this are UNDEFINED. You
327 # MUST call linux_config_exists first.
328 linux_chkconfig_builtin() {
329 linux_config_qa_check linux_chkconfig_builtin
330 local RESULT
331 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
332 local config
333 config="${KV_OUT_DIR}/.config"
334 [ ! -f "${config}" ] && config="/proc/config.gz"
335 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
336 [ "${RESULT}" = "y" ] && return 0 || return 1
337 }
338
339 # @FUNCTION: linux_chkconfig_string
340 # @USAGE: option
341 # @RETURN: CONFIG_<option>
342 # @DESCRIPTION:
343 # It prints the CONFIG_<option> value of the current kernel .config (it requires a configured kernel).
344 # If linux_config_exists returns false, the results of this are UNDEFINED. You
345 # MUST call linux_config_exists first.
346 linux_chkconfig_string() {
347 linux_config_qa_check linux_chkconfig_string
348 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
349 local config
350 config="${KV_OUT_DIR}/.config"
351 [ ! -f "${config}" ] && config="/proc/config.gz"
352 getfilevar_noexec "CONFIG_${1}" "${config}"
353 }
354
355 # Versioning Functions
356 # ---------------------------------------
357
358 # @FUNCTION: kernel_is
359 # @USAGE: [-lt -gt -le -ge -eq] major_number [minor_number patch_number]
360 # @RETURN: true or false
361 # @DESCRIPTION:
362 # It returns true when the current kernel version satisfies the comparison against the passed version.
363 # -eq is the default comparison.
364 #
365 # @CODE
366 # For Example where KV = 2.6.9
367 # kernel_is 2 4 returns false
368 # kernel_is 2 returns true
369 # kernel_is 2 6 returns true
370 # kernel_is 2 6 8 returns false
371 # kernel_is 2 6 9 returns true
372 # @CODE
373
374 # got the jist yet?
375
376 kernel_is() {
377 # if we haven't determined the version yet, we need to.
378 linux-info_get_any_version
379
380 local operator test value x=0 y=0 z=0
381
382 case ${1} in
383 -lt|lt) operator="-lt"; shift;;
384 -gt|gt) operator="-gt"; shift;;
385 -le|le) operator="-le"; shift;;
386 -ge|ge) operator="-ge"; shift;;
387 -eq|eq) operator="-eq"; shift;;
388 *) operator="-eq";;
389 esac
390
391 for x in ${@}; do
392 for((y=0; y<$((3 - ${#x})); y++)); do value="${value}0"; done
393 value="${value}${x}"
394 z=$((${z} + 1))
395
396 case ${z} in
397 1) for((y=0; y<$((3 - ${#KV_MAJOR})); y++)); do test="${test}0"; done;
398 test="${test}${KV_MAJOR}";;
399 2) for((y=0; y<$((3 - ${#KV_MINOR})); y++)); do test="${test}0"; done;
400 test="${test}${KV_MINOR}";;
401 3) for((y=0; y<$((3 - ${#KV_PATCH})); y++)); do test="${test}0"; done;
402 test="${test}${KV_PATCH}";;
403 *) die "Error in kernel-2_kernel_is(): Too many parameters.";;
404 esac
405 done
406
407 [ ${test} ${operator} ${value} ] && return 0 || return 1
408 }
409
410 get_localversion() {
411 local lv_list i x
412
413 # ignore files with ~ in it.
414 for i in $(ls ${1}/localversion* 2>/dev/null); do
415 [[ -n ${i//*~*} ]] && lv_list="${lv_list} ${i}"
416 done
417
418 for i in ${lv_list}; do
419 x="${x}$(<${i})"
420 done
421 x=${x/ /}
422 echo ${x}
423 }
424
425 # internal variable, so we know to only print the warning once
426 get_version_warning_done=
427
428 # @FUNCTION: get_version
429 # @DESCRIPTION:
430 # It gets the version of the kernel inside KERNEL_DIR and populates the KV_FULL variable
431 # (if KV_FULL is already set it does nothing).
432 #
433 # The kernel version variables (KV_MAJOR, KV_MINOR, KV_PATCH, KV_EXTRA and KV_LOCAL) are also set.
434 #
435 # The KV_DIR is set using the KERNEL_DIR env var, the KV_DIR_OUT is set using a valid
436 # KBUILD_OUTPUT (in a decreasing priority list, we look for the env var, makefile var or the
437 # symlink /lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build).
438 get_version() {
439 local kbuild_output
440
441 # no need to execute this twice assuming KV_FULL is populated.
442 # we can force by unsetting KV_FULL
443 [ -n "${KV_FULL}" ] && return 0
444
445 # if we dont know KV_FULL, then we need too.
446 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
447 unset KV_DIR
448
449 # KV_DIR will contain the full path to the sources directory we should use
450 [ -z "${get_version_warning_done}" ] && \
451 qeinfo "Determining the location of the kernel source code"
452 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
453 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
454
455 if [ -z "${KV_DIR}" ]
456 then
457 if [ -z "${get_version_warning_done}" ]; then
458 get_version_warning_done=1
459 qeerror "Unable to find kernel sources at ${KERNEL_DIR}"
460 #qeinfo "This package requires Linux sources."
461 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
462 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
463 qeinfo "(or the kernel you wish to build against)."
464 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
465 else
466 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
467 fi
468 fi
469 return 1
470 fi
471
472 if [ -z "${get_version_warning_done}" ]; then
473 qeinfo "Found kernel source directory:"
474 qeinfo " ${KV_DIR}"
475 fi
476
477 if [ ! -s "${KV_DIR}/Makefile" ]
478 then
479 if [ -z "${get_version_warning_done}" ]; then
480 get_version_warning_done=1
481 qeerror "Could not find a Makefile in the kernel source directory."
482 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
483 fi
484 return 1
485 fi
486
487 # OK so now we know our sources directory, but they might be using
488 # KBUILD_OUTPUT, and we need this for .config and localversions-*
489 # so we better find it eh?
490 # do we pass KBUILD_OUTPUT on the CLI?
491 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}"
492
493 # keep track of it
494 KERNEL_MAKEFILE="${KV_DIR}/Makefile"
495
496 # Check if the Makefile is valid for direct parsing.
497 # Check status results:
498 # - PASS, use 'getfilevar' to extract values
499 # - FAIL, use 'getfilevar_noexec' to extract values
500 # The check may fail if:
501 # - make is not present
502 # - corruption exists in the kernel makefile
503 local a='' b='' mkfunc='getfilevar'
504 a="$(getfilevar VERSION ${KERNEL_MAKEFILE})"
505 b="$(getfilevar_noexec VERSION ${KERNEL_MAKEFILE})"
506 [[ "${a}" != "${b}" ]] && mkfunc='getfilevar_noexec'
507
508 # And if we didn't pass it, we can take a nosey in the Makefile
509 kbuild_output="$(${mkfunc} KBUILD_OUTPUT ${KERNEL_MAKEFILE})"
510 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
511
512 # And contrary to existing functions I feel we shouldn't trust the
513 # directory name to find version information as this seems insane.
514 # so we parse ${KERNEL_MAKEFILE}
515 KV_MAJOR="$(${mkfunc} VERSION ${KERNEL_MAKEFILE})"
516 KV_MINOR="$(${mkfunc} PATCHLEVEL ${KERNEL_MAKEFILE})"
517 KV_PATCH="$(${mkfunc} SUBLEVEL ${KERNEL_MAKEFILE})"
518 KV_EXTRA="$(${mkfunc} EXTRAVERSION ${KERNEL_MAKEFILE})"
519
520 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
521 then
522 if [ -z "${get_version_warning_done}" ]; then
523 get_version_warning_done=1
524 qeerror "Could not detect kernel version."
525 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
526 fi
527 return 1
528 fi
529
530 # and in newer versions we can also pull LOCALVERSION if it is set.
531 # but before we do this, we need to find if we use a different object directory.
532 # This *WILL* break if the user is using localversions, but we assume it was
533 # caught before this if they are.
534 [ "${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}" == "$(uname -r)" ] && \
535 OUTPUT_DIR="${OUTPUT_DIR:-/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build}"
536
537 [ -h "${OUTPUT_DIR}" ] && KV_OUT_DIR="$(readlink -f ${OUTPUT_DIR})"
538 [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
539 if [ -n "${KV_OUT_DIR}" ];
540 then
541 qeinfo "Found kernel object directory:"
542 qeinfo " ${KV_OUT_DIR}"
543
544 KV_LOCAL="$(get_localversion ${KV_OUT_DIR})"
545 fi
546 # and if we STILL have not got it, then we better just set it to KV_DIR
547 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
548
549 KV_LOCAL="${KV_LOCAL}$(get_localversion ${KV_DIR})"
550 if linux_config_src_exists; then
551 KV_LOCAL="${KV_LOCAL}$(linux_chkconfig_string LOCALVERSION)"
552 KV_LOCAL="${KV_LOCAL//\"/}"
553
554 # For things like git that can append extra stuff:
555 [ -e ${KV_DIR}/scripts/setlocalversion ] &&
556 linux_chkconfig_builtin LOCALVERSION_AUTO &&
557 KV_LOCAL="${KV_LOCAL}$(sh ${KV_DIR}/scripts/setlocalversion ${KV_DIR})"
558 fi
559
560 # And we should set KV_FULL to the full expanded version
561 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
562
563 qeinfo "Found sources for kernel version:"
564 qeinfo " ${KV_FULL}"
565
566 return 0
567 }
568
569 # @FUNCTION: get_running_version
570 # @DESCRIPTION:
571 # It gets the version of the current running kernel and the result is the same as get_version() if the
572 # function can find the sources.
573 get_running_version() {
574 KV_FULL=$(uname -r)
575
576 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
577 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
578 unset KV_FULL
579 get_version
580 return $?
581 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
582 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
583 unset KV_FULL
584 get_version
585 return $?
586 else
587 KV_MAJOR=$(get_version_component_range 1 ${KV_FULL})
588 KV_MINOR=$(get_version_component_range 2 ${KV_FULL})
589 KV_PATCH=$(get_version_component_range 3- ${KV_FULL})
590 KV_PATCH=${KV_PATCH//-*}
591 [[ -n ${KV_FULL#*-} ]] && [[ -n ${KV_FULL//${KV_FULL#*-}} ]] \
592 && KV_EXTRA="-${KV_FULL#*-}"
593 fi
594 return 0
595 }
596
597 # This next function is named with the eclass prefix to avoid conflicts with
598 # some old versionator-like eclass functions.
599
600 # @FUNCTION: linux-info_get_any_version
601 # @DESCRIPTION:
602 # This attempts to find the version of the sources, and otherwise falls back to
603 # the version of the running kernel.
604 linux-info_get_any_version() {
605 get_version
606 if [[ $? -ne 0 ]]; then
607 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
608 get_running_version
609 fi
610 }
611
612
613 # ebuild check functions
614 # ---------------------------------------
615
616 # @FUNCTION: check_kernel_built
617 # @DESCRIPTION:
618 # This function verifies that the current kernel sources have been already prepared otherwise it dies.
619 check_kernel_built() {
620 # if we haven't determined the version yet, we need to
621 require_configured_kernel
622 get_version
623
624 if [ ! -f "${KV_OUT_DIR}/include/linux/version.h" ]
625 then
626 eerror "These sources have not yet been prepared."
627 eerror "We cannot build against an unprepared tree."
628 eerror "To resolve this, please type the following:"
629 eerror
630 eerror "# cd ${KV_DIR}"
631 eerror "# make oldconfig"
632 eerror "# make modules_prepare"
633 eerror
634 eerror "Then please try merging this module again."
635 die "Kernel sources need compiling first"
636 fi
637 }
638
639 # @FUNCTION: check_modules_supported
640 # @DESCRIPTION:
641 # This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
642 check_modules_supported() {
643 # if we haven't determined the version yet, we need too.
644 require_configured_kernel
645 get_version
646
647 if ! linux_chkconfig_builtin "MODULES"
648 then
649 eerror "These sources do not support loading external modules."
650 eerror "to be able to use this module please enable \"Loadable modules support\""
651 eerror "in your kernel, recompile and then try merging this module again."
652 die "No support for external modules in ${KV_FULL} config"
653 fi
654 }
655
656 # @FUNCTION: check_extra_config
657 # @DESCRIPTION:
658 # It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
659 # the prefix ~ is not used) doesn't satisfy the directive.
660 check_extra_config() {
661 local config negate die error reworkmodulenames
662 local soft_errors_count=0 hard_errors_count=0 config_required=0
663 # store the value of the QA check, because otherwise we won't catch usages
664 # after if check_extra_config is called AND other direct calls are done
665 # later.
666 local old_LINUX_CONFIG_EXISTS_DONE="${_LINUX_CONFIG_EXISTS_DONE}"
667
668 # if we haven't determined the version yet, we need to
669 linux-info_get_any_version
670
671 # Determine if we really need a .config. The only time when we don't need
672 # one is when all of the CONFIG_CHECK options are prefixed with "~".
673 for config in ${CONFIG_CHECK}
674 do
675 if [[ "${config:0:1}" != "~" ]]; then
676 config_required=1
677 break
678 fi
679 done
680
681 # TODO: After we enable the new code for /proc/config.gz, we need to
682 # change this back to linux_config_exists.
683 if [[ ${config_required} == 0 ]]; then
684 # In the case where we don't require a .config, we can now bail out
685 # if the user has no .config as there is nothing to do. Otherwise
686 # code later will cause a failure due to missing .config.
687 if ! linux_config_src_exists; then
688 ewarn "Unable to check for the following kernel config options due"
689 ewarn "to absence of any configured kernel sources or compiled"
690 ewarn "config:"
691 for config in ${CONFIG_CHECK}; do
692 local_error="ERROR_${config#\~}"
693 msg="${!local_error}"
694 if [[ "x${msg}" == "x" ]]; then
695 local_error="WARNING_${config#\~}"
696 msg="${!local_error}"
697 fi
698 ewarn " - ${config#\~}${msg:+ - }${msg}"
699 done
700 ewarn "You're on your own to make sure they are set if needed."
701 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
702 return 0
703 fi
704 else
705 [ -n "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
706 fi
707
708 einfo "Checking for suitable kernel configuration options..."
709
710 for config in ${CONFIG_CHECK}
711 do
712 # if we specify any fatal, ensure we honor them
713 die=1
714 error=0
715 negate=0
716 reworkmodulenames=0
717
718 if [[ ${config:0:1} == "~" ]]; then
719 die=0
720 config=${config:1}
721 elif [[ ${config:0:1} == "@" ]]; then
722 die=0
723 reworkmodulenames=1
724 config=${config:1}
725 fi
726 if [[ ${config:0:1} == "!" ]]; then
727 negate=1
728 config=${config:1}
729 fi
730
731 if [[ ${negate} == 1 ]]; then
732 linux_chkconfig_present ${config} && error=2
733 elif [[ ${reworkmodulenames} == 1 ]]; then
734 local temp_config="${config//*:}" i n
735 config="${config//:*}"
736 if linux_chkconfig_present ${config}; then
737 for i in ${MODULE_NAMES}; do
738 n="${i//${temp_config}}"
739 [[ -z ${n//\(*} ]] && \
740 MODULE_IGNORE="${MODULE_IGNORE} ${temp_config}"
741 done
742 error=2
743 fi
744 else
745 linux_chkconfig_present ${config} || error=1
746 fi
747
748 if [[ ${error} > 0 ]]; then
749 local report_func="eerror" local_error
750 local_error="ERROR_${config}"
751 local_error="${!local_error}"
752
753 if [[ -z "${local_error}" ]]; then
754 # using old, deprecated format.
755 local_error="${config}_ERROR"
756 local_error="${!local_error}"
757 fi
758 if [[ ${die} == 0 && -z "${local_error}" ]]; then
759 #soft errors can be warnings
760 local_error="WARNING_${config}"
761 local_error="${!local_error}"
762 if [[ -n "${local_error}" ]] ; then
763 report_func="ewarn"
764 fi
765 fi
766
767 if [[ -z "${local_error}" ]]; then
768 [[ ${error} == 1 ]] \
769 && local_error="is not set when it should be." \
770 || local_error="should not be set. But it is."
771 local_error="CONFIG_${config}:\t ${local_error}"
772 fi
773 if [[ ${die} == 0 ]]; then
774 ${report_func} " ${local_error}"
775 soft_errors_count=$[soft_errors_count + 1]
776 else
777 ${report_func} " ${local_error}"
778 hard_errors_count=$[hard_errors_count + 1]
779 fi
780 fi
781 done
782
783 if [[ ${hard_errors_count} > 0 ]]; then
784 eerror "Please check to make sure these options are set correctly."
785 eerror "Failure to do so may cause unexpected problems."
786 eerror "Once you have satisfied these options, please try merging"
787 eerror "this package again."
788 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
789 die "Incorrect kernel configuration options"
790 elif [[ ${soft_errors_count} > 0 ]]; then
791 ewarn "Please check to make sure these options are set correctly."
792 ewarn "Failure to do so may cause unexpected problems."
793 else
794 eend 0
795 fi
796 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
797 }
798
799 check_zlibinflate() {
800 # if we haven't determined the version yet, we need to
801 require_configured_kernel
802 get_version
803
804 # although I restructured this code - I really really really dont support it!
805
806 # bug #27882 - zlib routines are only linked into the kernel
807 # if something compiled into the kernel calls them
808 #
809 # plus, for the cloop module, it appears that there's no way
810 # to get cloop.o to include a static zlib if CONFIG_MODVERSIONS
811 # is on
812
813 local INFLATE
814 local DEFLATE
815
816 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
817
818 ebegin "checking ZLIB_INFLATE"
819 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
820 eend $?
821 [ "$?" != 0 ] && die
822
823 ebegin "checking ZLIB_DEFLATE"
824 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
825 eend $?
826 [ "$?" != 0 ] && die
827
828 local LINENO_START
829 local LINENO_END
830 local SYMBOLS
831 local x
832
833 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
834 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
835 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
836 (( LINENO_END = $LINENO_END - 1 ))
837 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
838
839 # okay, now we have a list of symbols
840 # we need to check each one in turn, to see whether it is set or not
841 for x in $SYMBOLS ; do
842 if [ "${!x}" = "y" ]; then
843 # we have a winner!
844 einfo "${x} ensures zlib is linked into your kernel - excellent"
845 return 0
846 fi
847 done
848
849 eerror
850 eerror "This kernel module requires ZLIB library support."
851 eerror "You have enabled zlib support in your kernel, but haven't enabled"
852 eerror "enabled any option that will ensure that zlib is linked into your"
853 eerror "kernel."
854 eerror
855 eerror "Please ensure that you enable at least one of these options:"
856 eerror
857
858 for x in $SYMBOLS ; do
859 eerror " * $x"
860 done
861
862 eerror
863 eerror "Please remember to recompile and install your kernel, and reboot"
864 eerror "into your new kernel before attempting to load this kernel module."
865
866 die "Kernel doesn't include zlib support"
867 }
868
869 ################################
870 # Default pkg_setup
871 # Also used when inheriting linux-mod to force a get_version call
872 # @FUNCTION: linux-info_pkg_setup
873 # @DESCRIPTION:
874 # Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
875 # to support the options specified in CONFIG_CHECK (if not null)
876 linux-info_pkg_setup() {
877 linux-info_get_any_version
878
879 if kernel_is 2 4; then
880 if [ "$( gcc-major-version )" -eq "4" ] ; then
881 echo
882 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"
883 ewarn "linux-2.4 (or modules building against a linux-2.4 kernel)!"
884 echo
885 ewarn "Either switch to another gcc-version (via gcc-config) or use a"
886 ewarn "newer kernel that supports gcc-4."
887 echo
888 ewarn "Also be aware that bugreports about gcc-4 not working"
889 ewarn "with linux-2.4 based ebuilds will be closed as INVALID!"
890 echo
891 epause 10
892 fi
893 fi
894
895 [ -n "${CONFIG_CHECK}" ] && check_extra_config;
896 }

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