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Revision 1.68 - (show annotations) (download)
Sun Sep 6 23:36:04 2009 UTC (5 years, 1 month ago) by robbat2
Branch: MAIN
Changes since 1.67: +7 -7 lines
Match the function prototype that allows "-OP" form, which matches the bash versions.

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 1.67 2009/09/06 23:31:47 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
227 # @FUNCTION: linux_config_src_exists
228 # @RETURN: true or false
229 # @DESCRIPTION:
230 # It returns true if .config exists in a build directory otherwise false
231 linux_config_src_exists() {
232 [ -s "${KV_OUT_DIR}/.config" ]
233 }
234
235 # @FUNCTION: linux_config_bin_exists
236 # @RETURN: true or false
237 # @DESCRIPTION:
238 # It returns true if .config exists in /proc, otherwise false
239 linux_config_bin_exists() {
240 [ -s "/proc/config.gz" ]
241 }
242
243 # @FUNCTION: linux_config_exists
244 # @RETURN: true or false
245 # @DESCRIPTION:
246 # It returns true if .config exists otherwise false
247 #
248 # This function MUST be checked before using any of the linux_chkconfig_*
249 # functions.
250 linux_config_exists() {
251 linux_config_src_exists || linux_config_bin_exists
252 }
253
254 # @FUNCTION: require_configured_kernel
255 # @DESCRIPTION:
256 # This function verifies that the current kernel is configured (it checks against the existence of .config)
257 # otherwise it dies.
258 require_configured_kernel() {
259 if ! linux_config_src_exists; then
260 qeerror "Could not find a usable .config in the kernel source directory."
261 qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources."
262 qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that"
263 qeerror "it points to the necessary object directory so that it might find .config."
264 die "Kernel not configured; no .config found in ${KV_OUT_DIR}"
265 fi
266 }
267
268 # @FUNCTION: linux_chkconfig_present
269 # @USAGE: option
270 # @RETURN: true or false
271 # @DESCRIPTION:
272 # It checks that CONFIG_<option>=y or CONFIG_<option>=m is present in the current kernel .config
273 # If linux_config_exists returns false, the results of this are UNDEFINED. You
274 # MUST call linux_config_exists first.
275 linux_chkconfig_present() {
276 local RESULT
277 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
278 local config
279 config="${KV_OUT_DIR}/.config"
280 [ ! -f "${config}" ] && config="/proc/config.gz"
281 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
282 [ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1
283 }
284
285 # @FUNCTION: linux_chkconfig_module
286 # @USAGE: option
287 # @RETURN: true or false
288 # @DESCRIPTION:
289 # It checks that CONFIG_<option>=m is present in the current kernel .config
290 # If linux_config_exists returns false, the results of this are UNDEFINED. You
291 # MUST call linux_config_exists first.
292 linux_chkconfig_module() {
293 local RESULT
294 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
295 local config
296 config="${KV_OUT_DIR}/.config"
297 [ ! -f "${config}" ] && config="/proc/config.gz"
298 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
299 [ "${RESULT}" = "m" ] && return 0 || return 1
300 }
301
302 # @FUNCTION: linux_chkconfig_builtin
303 # @USAGE: option
304 # @RETURN: true or false
305 # @DESCRIPTION:
306 # It checks that CONFIG_<option>=y is present in the current kernel .config
307 # If linux_config_exists returns false, the results of this are UNDEFINED. You
308 # MUST call linux_config_exists first.
309 linux_chkconfig_builtin() {
310 local RESULT
311 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
312 local config
313 config="${KV_OUT_DIR}/.config"
314 [ ! -f "${config}" ] && config="/proc/config.gz"
315 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
316 [ "${RESULT}" = "y" ] && return 0 || return 1
317 }
318
319 # @FUNCTION: linux_chkconfig_string
320 # @USAGE: option
321 # @RETURN: CONFIG_<option>
322 # @DESCRIPTION:
323 # It prints the CONFIG_<option> value of the current kernel .config (it requires a configured kernel).
324 # If linux_config_exists returns false, the results of this are UNDEFINED. You
325 # MUST call linux_config_exists first.
326 linux_chkconfig_string() {
327 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
328 local config
329 config="${KV_OUT_DIR}/.config"
330 [ ! -f "${config}" ] && config="/proc/config.gz"
331 getfilevar_noexec "CONFIG_${1}" "${config}"
332 }
333
334 # Versioning Functions
335 # ---------------------------------------
336
337 # @FUNCTION: kernel_is
338 # @USAGE: [-lt -gt -le -ge -eq] major_number [minor_number patch_number]
339 # @RETURN: true or false
340 # @DESCRIPTION:
341 # It returns true when the current kernel version satisfies the comparison against the passed version.
342 # -eq is the default comparison.
343 #
344 # @CODE
345 # For Example where KV = 2.6.9
346 # kernel_is 2 4 returns false
347 # kernel_is 2 returns true
348 # kernel_is 2 6 returns true
349 # kernel_is 2 6 8 returns false
350 # kernel_is 2 6 9 returns true
351 # @CODE
352
353 # got the jist yet?
354
355 kernel_is() {
356 # if we haven't determined the version yet, we need to.
357 get_version
358 local operator test value x=0 y=0 z=0
359
360 case ${1} in
361 -lt|lt) operator="-lt"; shift;;
362 -gt|gt) operator="-gt"; shift;;
363 -le|le) operator="-le"; shift;;
364 -ge|ge) operator="-ge"; shift;;
365 -eq|eq) operator="-eq"; shift;;
366 *) operator="-eq";;
367 esac
368
369 for x in ${@}; do
370 for((y=0; y<$((3 - ${#x})); y++)); do value="${value}0"; done
371 value="${value}${x}"
372 z=$((${z} + 1))
373
374 case ${z} in
375 1) for((y=0; y<$((3 - ${#KV_MAJOR})); y++)); do test="${test}0"; done;
376 test="${test}${KV_MAJOR}";;
377 2) for((y=0; y<$((3 - ${#KV_MINOR})); y++)); do test="${test}0"; done;
378 test="${test}${KV_MINOR}";;
379 3) for((y=0; y<$((3 - ${#KV_PATCH})); y++)); do test="${test}0"; done;
380 test="${test}${KV_PATCH}";;
381 *) die "Error in kernel-2_kernel_is(): Too many parameters.";;
382 esac
383 done
384
385 [ ${test} ${operator} ${value} ] && return 0 || return 1
386 }
387
388 get_localversion() {
389 local lv_list i x
390
391 # ignore files with ~ in it.
392 for i in $(ls ${1}/localversion* 2>/dev/null); do
393 [[ -n ${i//*~*} ]] && lv_list="${lv_list} ${i}"
394 done
395
396 for i in ${lv_list}; do
397 x="${x}$(<${i})"
398 done
399 x=${x/ /}
400 echo ${x}
401 }
402
403 # internal variable, so we know to only print the warning once
404 get_version_warning_done=
405
406 # @FUNCTION: get_version
407 # @DESCRIPTION:
408 # It gets the version of the kernel inside KERNEL_DIR and populates the KV_FULL variable
409 # (if KV_FULL is already set it does nothing).
410 #
411 # The kernel version variables (KV_MAJOR, KV_MINOR, KV_PATCH, KV_EXTRA and KV_LOCAL) are also set.
412 #
413 # The KV_DIR is set using the KERNEL_DIR env var, the KV_DIR_OUT is set using a valid
414 # KBUILD_OUTPUT (in a decreasing priority list, we look for the env var, makefile var or the
415 # symlink /lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build).
416 get_version() {
417 local kbuild_output
418
419 # no need to execute this twice assuming KV_FULL is populated.
420 # we can force by unsetting KV_FULL
421 [ -n "${KV_FULL}" ] && return 0
422
423 # if we dont know KV_FULL, then we need too.
424 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
425 unset KV_DIR
426
427 # KV_DIR will contain the full path to the sources directory we should use
428 [ -z "${get_version_warning_done}" ] && \
429 qeinfo "Determining the location of the kernel source code"
430 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
431 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
432
433 if [ -z "${KV_DIR}" ]
434 then
435 if [ -z "${get_version_warning_done}" ]; then
436 get_version_warning_done=1
437 qeerror "Unable to find kernel sources at ${KERNEL_DIR}"
438 #qeinfo "This package requires Linux sources."
439 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
440 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
441 qeinfo "(or the kernel you wish to build against)."
442 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
443 else
444 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
445 fi
446 fi
447 return 1
448 fi
449
450 if [ -z "${get_version_warning_done}" ]; then
451 qeinfo "Found kernel source directory:"
452 qeinfo " ${KV_DIR}"
453 fi
454
455 if [ ! -s "${KV_DIR}/Makefile" ]
456 then
457 if [ -z "${get_version_warning_done}" ]; then
458 get_version_warning_done=1
459 qeerror "Could not find a Makefile in the kernel source directory."
460 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
461 fi
462 return 1
463 fi
464
465 # OK so now we know our sources directory, but they might be using
466 # KBUILD_OUTPUT, and we need this for .config and localversions-*
467 # so we better find it eh?
468 # do we pass KBUILD_OUTPUT on the CLI?
469 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}"
470
471 # And if we didn't pass it, we can take a nosey in the Makefile
472 kbuild_output="$(getfilevar_noexec KBUILD_OUTPUT ${KV_DIR}/Makefile)"
473 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
474
475 # And contrary to existing functions I feel we shouldn't trust the
476 # directory name to find version information as this seems insane.
477 # so we parse ${KV_DIR}/Makefile
478 KV_MAJOR="$(getfilevar_noexec VERSION ${KV_DIR}/Makefile)"
479 KV_MINOR="$(getfilevar_noexec PATCHLEVEL ${KV_DIR}/Makefile)"
480 KV_PATCH="$(getfilevar_noexec SUBLEVEL ${KV_DIR}/Makefile)"
481 KV_EXTRA="$(getfilevar_noexec EXTRAVERSION ${KV_DIR}/Makefile)"
482
483 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
484 then
485 if [ -z "${get_version_warning_done}" ]; then
486 get_version_warning_done=1
487 qeerror "Could not detect kernel version."
488 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
489 fi
490 return 1
491 fi
492
493 # and in newer versions we can also pull LOCALVERSION if it is set.
494 # but before we do this, we need to find if we use a different object directory.
495 # This *WILL* break if the user is using localversions, but we assume it was
496 # caught before this if they are.
497 [ "${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}" == "$(uname -r)" ] && \
498 OUTPUT_DIR="${OUTPUT_DIR:-/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build}"
499
500 [ -h "${OUTPUT_DIR}" ] && KV_OUT_DIR="$(readlink -f ${OUTPUT_DIR})"
501 [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
502 if [ -n "${KV_OUT_DIR}" ];
503 then
504 qeinfo "Found kernel object directory:"
505 qeinfo " ${KV_OUT_DIR}"
506
507 KV_LOCAL="$(get_localversion ${KV_OUT_DIR})"
508 fi
509 # and if we STILL have not got it, then we better just set it to KV_DIR
510 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
511
512 KV_LOCAL="${KV_LOCAL}$(get_localversion ${KV_DIR})"
513 if linux_config_exists; then
514 KV_LOCAL="${KV_LOCAL}$(linux_chkconfig_string LOCALVERSION)"
515 KV_LOCAL="${KV_LOCAL//\"/}"
516
517 # For things like git that can append extra stuff:
518 [ -e ${KV_DIR}/scripts/setlocalversion ] &&
519 linux_chkconfig_builtin LOCALVERSION_AUTO &&
520 KV_LOCAL="${KV_LOCAL}$(sh ${KV_DIR}/scripts/setlocalversion ${KV_DIR})"
521 fi
522
523 # And we should set KV_FULL to the full expanded version
524 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
525
526 qeinfo "Found sources for kernel version:"
527 qeinfo " ${KV_FULL}"
528
529 return 0
530 }
531
532 # @FUNCTION: get_running_version
533 # @DESCRIPTION:
534 # It gets the version of the current running kernel and the result is the same as get_version() if the
535 # function can find the sources.
536 get_running_version() {
537 KV_FULL=$(uname -r)
538
539 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
540 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
541 unset KV_FULL
542 get_version
543 return $?
544 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
545 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
546 unset KV_FULL
547 get_version
548 return $?
549 else
550 KV_MAJOR=$(get_version_component_range 1 ${KV_FULL})
551 KV_MINOR=$(get_version_component_range 2 ${KV_FULL})
552 KV_PATCH=$(get_version_component_range 3- ${KV_FULL})
553 KV_PATCH=${KV_PATCH//-*}
554 [[ -n ${KV_FULL#*-} ]] && [[ -n ${KV_FULL//${KV_FULL#*-}} ]] \
555 && KV_EXTRA="-${KV_FULL#*-}"
556 fi
557 return 0
558 }
559
560 # This next function is named with the eclass prefix to avoid conflicts with
561 # some old versionator-like eclass functions.
562
563 # @FUNCTION: linux-info_get_any_version
564 # @DESCRIPTION:
565 # This attempts to find the version of the sources, and otherwise falls back to
566 # the version of the running kernel.
567 linux-info_get_any_version() {
568 get_version
569 if [[ $? -ne 0 ]]; then
570 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
571 get_running_version
572 fi
573 }
574
575
576 # ebuild check functions
577 # ---------------------------------------
578
579 # @FUNCTION: check_kernel_built
580 # @DESCRIPTION:
581 # This function verifies that the current kernel sources have been already prepared otherwise it dies.
582 check_kernel_built() {
583 # if we haven't determined the version yet, we need to
584 require_configured_kernel
585 get_version
586
587 if [ ! -f "${KV_OUT_DIR}/include/linux/version.h" ]
588 then
589 eerror "These sources have not yet been prepared."
590 eerror "We cannot build against an unprepared tree."
591 eerror "To resolve this, please type the following:"
592 eerror
593 eerror "# cd ${KV_DIR}"
594 eerror "# make oldconfig"
595 eerror "# make modules_prepare"
596 eerror
597 eerror "Then please try merging this module again."
598 die "Kernel sources need compiling first"
599 fi
600 }
601
602 # @FUNCTION: check_modules_supported
603 # @DESCRIPTION:
604 # This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
605 check_modules_supported() {
606 # if we haven't determined the version yet, we need too.
607 require_configured_kernel
608 get_version
609
610 if ! linux_chkconfig_builtin "MODULES"
611 then
612 eerror "These sources do not support loading external modules."
613 eerror "to be able to use this module please enable \"Loadable modules support\""
614 eerror "in your kernel, recompile and then try merging this module again."
615 die "No support for external modules in ${KV_FULL} config"
616 fi
617 }
618
619 # @FUNCTION: check_extra_config
620 # @DESCRIPTION:
621 # It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
622 # the prefix ~ is not used) doesn't satisfy the directive.
623 check_extra_config() {
624 local config negate die error reworkmodulenames
625 local soft_errors_count=0 hard_errors_count=0 config_required=0
626
627 # if we haven't determined the version yet, we need to
628 get_version
629
630 # Determine if we really need a .config. The only time when we don't need
631 # one is when all of the CONFIG_CHECK options are prefixed with "~".
632 for config in ${CONFIG_CHECK}
633 do
634 if [[ "${config:0:1}" != "~" ]]; then
635 config_required=1
636 break
637 fi
638 done
639
640 if [[ ${config_required} == 0 ]]; then
641 # In the case where we don't require a .config, we can now bail out
642 # if the user has no .config as there is nothing to do. Otherwise
643 # code later will cause a failure due to missing .config.
644 if ! linux_config_exists; then
645 ewarn "Unable to check for the following kernel config options due"
646 ewarn "to absence of any configured kernel sources or compiled"
647 ewarn "config:"
648 for config in ${CONFIG_CHECK}; do
649 ewarn " - ${config#\~}"
650 done
651 ewarn "You're on your own to make sure they are set if needed."
652 return 0
653 fi
654 else
655 [ -n "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
656 fi
657
658 einfo "Checking for suitable kernel configuration options..."
659
660 for config in ${CONFIG_CHECK}
661 do
662 # if we specify any fatal, ensure we honor them
663 die=1
664 error=0
665 negate=0
666 reworkmodulenames=0
667
668 if [[ ${config:0:1} == "~" ]]; then
669 die=0
670 config=${config:1}
671 elif [[ ${config:0:1} == "@" ]]; then
672 die=0
673 reworkmodulenames=1
674 config=${config:1}
675 fi
676 if [[ ${config:0:1} == "!" ]]; then
677 negate=1
678 config=${config:1}
679 fi
680
681 if [[ ${negate} == 1 ]]; then
682 linux_chkconfig_present ${config} && error=2
683 elif [[ ${reworkmodulenames} == 1 ]]; then
684 local temp_config="${config//*:}" i n
685 config="${config//:*}"
686 if linux_chkconfig_present ${config}; then
687 for i in ${MODULE_NAMES}; do
688 n="${i//${temp_config}}"
689 [[ -z ${n//\(*} ]] && \
690 MODULE_IGNORE="${MODULE_IGNORE} ${temp_config}"
691 done
692 error=2
693 fi
694 else
695 linux_chkconfig_present ${config} || error=1
696 fi
697
698 if [[ ${error} > 0 ]]; then
699 local report_func="eerror" local_error
700 local_error="ERROR_${config}"
701 local_error="${!local_error}"
702
703 if [[ -z "${local_error}" ]]; then
704 # using old, deprecated format.
705 local_error="${config}_ERROR"
706 local_error="${!local_error}"
707 fi
708 if [[ ${die} == 0 && -z "${local_error}" ]]; then
709 #soft errors can be warnings
710 local_error="WARNING_${config}"
711 local_error="${!local_error}"
712 if [[ -n "${local_error}" ]] ; then
713 report_func="ewarn"
714 fi
715 fi
716
717 if [[ -z "${local_error}" ]]; then
718 [[ ${error} == 1 ]] \
719 && local_error="is not set when it should be." \
720 || local_error="should not be set. But it is."
721 local_error="CONFIG_${config}:\t ${local_error}"
722 fi
723 if [[ ${die} == 0 ]]; then
724 ${report_func} " ${local_error}"
725 soft_errors_count=$[soft_errors_count + 1]
726 else
727 ${report_func} " ${local_error}"
728 hard_errors_count=$[hard_errors_count + 1]
729 fi
730 fi
731 done
732
733 if [[ ${hard_errors_count} > 0 ]]; then
734 eerror "Please check to make sure these options are set correctly."
735 eerror "Failure to do so may cause unexpected problems."
736 eerror "Once you have satisfied these options, please try merging"
737 eerror "this package again."
738 die "Incorrect kernel configuration options"
739 elif [[ ${soft_errors_count} > 0 ]]; then
740 ewarn "Please check to make sure these options are set correctly."
741 ewarn "Failure to do so may cause unexpected problems."
742 else
743 eend 0
744 fi
745 }
746
747 check_zlibinflate() {
748 # if we haven't determined the version yet, we need to
749 require_configured_kernel
750 get_version
751
752 # although I restructured this code - I really really really dont support it!
753
754 # bug #27882 - zlib routines are only linked into the kernel
755 # if something compiled into the kernel calls them
756 #
757 # plus, for the cloop module, it appears that there's no way
758 # to get cloop.o to include a static zlib if CONFIG_MODVERSIONS
759 # is on
760
761 local INFLATE
762 local DEFLATE
763
764 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
765
766 ebegin "checking ZLIB_INFLATE"
767 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
768 eend $?
769 [ "$?" != 0 ] && die
770
771 ebegin "checking ZLIB_DEFLATE"
772 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
773 eend $?
774 [ "$?" != 0 ] && die
775
776 local LINENO_START
777 local LINENO_END
778 local SYMBOLS
779 local x
780
781 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
782 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
783 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
784 (( LINENO_END = $LINENO_END - 1 ))
785 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
786
787 # okay, now we have a list of symbols
788 # we need to check each one in turn, to see whether it is set or not
789 for x in $SYMBOLS ; do
790 if [ "${!x}" = "y" ]; then
791 # we have a winner!
792 einfo "${x} ensures zlib is linked into your kernel - excellent"
793 return 0
794 fi
795 done
796
797 eerror
798 eerror "This kernel module requires ZLIB library support."
799 eerror "You have enabled zlib support in your kernel, but haven't enabled"
800 eerror "enabled any option that will ensure that zlib is linked into your"
801 eerror "kernel."
802 eerror
803 eerror "Please ensure that you enable at least one of these options:"
804 eerror
805
806 for x in $SYMBOLS ; do
807 eerror " * $x"
808 done
809
810 eerror
811 eerror "Please remember to recompile and install your kernel, and reboot"
812 eerror "into your new kernel before attempting to load this kernel module."
813
814 die "Kernel doesn't include zlib support"
815 }
816
817 ################################
818 # Default pkg_setup
819 # Also used when inheriting linux-mod to force a get_version call
820 # @FUNCTION: linux-info_pkg_setup
821 # @DESCRIPTION:
822 # Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
823 # to support the options specified in CONFIG_CHECK (if not null)
824 linux-info_pkg_setup() {
825 linux-info_get_any_version
826
827 if kernel_is 2 4; then
828 if [ "$( gcc-major-version )" -eq "4" ] ; then
829 echo
830 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"
831 ewarn "linux-2.4 (or modules building against a linux-2.4 kernel)!"
832 echo
833 ewarn "Either switch to another gcc-version (via gcc-config) or use a"
834 ewarn "newer kernel that supports gcc-4."
835 echo
836 ewarn "Also be aware that bugreports about gcc-4 not working"
837 ewarn "with linux-2.4 based ebuilds will be closed as INVALID!"
838 echo
839 epause 10
840 fi
841 fi
842
843 [ -n "${CONFIG_CHECK}" ] && check_extra_config;
844 }

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