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1# Copyright 1999-2006 Gentoo Foundation 1# Copyright 1999-2006 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/linux-info.eclass,v 1.52 2007/10/03 12:53:10 phreak Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/linux-info.eclass,v 1.62 2009/09/06 22:54:58 robbat2 Exp $
4#
5# Description: This eclass is used as a central eclass for accessing kernel
6# related information for sources already installed.
7# It is vital for linux-mod to function correctly, and is split
8# out so that any ebuild behaviour "templates" are abstracted out
9# using additional eclasses.
10# 4#
11# Original author: John Mylchreest <johnm@gentoo.org> 5# Original author: John Mylchreest <johnm@gentoo.org>
12# Maintainer: kernel-misc@gentoo.org 6# Maintainer: kernel-misc@gentoo.org
13# 7#
14# Please direct your bugs to the current eclass maintainer :) 8# Please direct your bugs to the current eclass maintainer :)
15 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
16# A Couple of env vars are available to effect usage of this eclass 25# A Couple of env vars are available to effect usage of this eclass
17# These are as follows: 26# These are as follows:
18# 27
19# Env Var Option Description 28# @ECLASS-VARIABLE: KERNEL_DIR
20# KERNEL_DIR <string> The directory containing kernel the target kernel 29# @DESCRIPTION:
21# sources. 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:
22# CONFIG_CHECK <string> a list of .config options to check for before 35# A string containing a list of .config options to check for before
23# proceeding with the install. ie: CONFIG_CHECK="MTRR" 36# proceeding with the install.
37#
38# e.g.: CONFIG_CHECK="MTRR"
39#
24# You can also check that an option doesn't exist by 40# You can also check that an option doesn't exist by
25# prepending it with an exclamation mark (!). 41# prepending it with an exclamation mark (!).
42#
26# ie: CONFIG_CHECK="!MTRR" 43# e.g.: CONFIG_CHECK="!MTRR"
44#
27# To simply warn about a missing option, prepend a '~'. 45# To simply warn about a missing option, prepend a '~'.
28# ERROR_CFG <string> The error message to display when the above check 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
29# fails. <CFG> should reference the appropriate option 58# fails. <CFG> should reference the appropriate option used in CONFIG_CHECK.
30# as above. ie: ERROR_MTRR="MTRR exists in the .config 59#
31# but shouldn't!!" 60# e.g.: ERROR_MTRR="MTRR exists in the .config but shouldn't!!"
32# KBUILD_OUTPUT <string> This is passed on commandline, or can be set from 61
33# the kernel makefile. This contains the directory 62# @ECLASS-VARIABLE: KBUILD_OUTPUT
63# @DESCRIPTION:
64# A string passed on commandline, or set from the kernel makefile. It contains the directory
34# which is to be used as the kernel object directory. 65# which is to be used as the kernel object directory.
35 66
36# There are also a couple of variables which are set by this, and shouldn't be 67# There are also a couple of variables which are set by this, and shouldn't be
37# set by hand. These are as follows: 68# set by hand. These are as follows:
38# 69
39# Env Var Option Description 70# @ECLASS-VARIABLE: KV_FULL
40# KV_FULL <string> The full kernel version. ie: 2.6.9-gentoo-johnm-r1 71# @DESCRIPTION:
41# KV_MAJOR <integer> The kernel major version. ie: 2 72# A read-only variable. It's a string containing the full kernel version. ie: 2.6.9-gentoo-johnm-r1
42# KV_MINOR <integer> The kernel minor version. ie: 6 73
43# KV_PATCH <integer> The kernel patch version. ie: 9 74# @ECLASS-VARIABLE: KV_MAJOR
44# KV_EXTRA <string> The kernel EXTRAVERSION. ie: -gentoo 75# @DESCRIPTION:
45# KV_LOCAL <string> The kernel LOCALVERSION concatenation. ie: -johnm 76# A read-only variable. It's an integer containing the kernel major version. ie: 2
46# KV_DIR <string> The kernel source directory, will be null if 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
47# KERNEL_DIR is invalid. 97# KERNEL_DIR is invalid.
48# KV_OUT_DIR <string> The kernel object directory. will be KV_DIR unless 98
49# koutput is used. This should be used for referencing 99# @ECLASS-VARIABLE: KV_OUT_DIR
50# .config. 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.
51 107
52# And to ensure all the weirdness with crosscompile 108# And to ensure all the weirdness with crosscompile
53inherit toolchain-funcs versionator 109inherit toolchain-funcs versionator
54 110
55EXPORT_FUNCTIONS pkg_setup 111EXPORT_FUNCTIONS pkg_setup
99qeerror() { qout eerror "${@}" ; } 155qeerror() { qout eerror "${@}" ; }
100 156
101# File Functions 157# File Functions
102# --------------------------------------- 158# ---------------------------------------
103 159
104# getfilevar accepts 2 vars as follows: 160# @FUNCTION: getfilevar
105# getfilevar <VARIABLE> <CONFIGFILE> 161# @USAGE: variable configfile
106 162# @RETURN: the value of the variable
163# @DESCRIPTION:
164# It detects the value of the variable defined in the file configfile. This is
165# done by including the configfile, and printing the variable with Make.
166# It WILL break if your makefile has missing dependencies!
107getfilevar() { 167getfilevar() {
108local ERROR workingdir basefname basedname myARCH="${ARCH}" 168local ERROR basefname basedname myARCH="${ARCH}"
109 ERROR=0 169 ERROR=0
110 170
111 [ -z "${1}" ] && ERROR=1 171 [ -z "${1}" ] && ERROR=1
112 [ ! -f "${2}" ] && ERROR=1 172 [ ! -f "${2}" ] && ERROR=1
113 173
115 then 175 then
116 echo -e "\n" 176 echo -e "\n"
117 eerror "getfilevar requires 2 variables, with the second a valid file." 177 eerror "getfilevar requires 2 variables, with the second a valid file."
118 eerror " getfilevar <VARIABLE> <CONFIGFILE>" 178 eerror " getfilevar <VARIABLE> <CONFIGFILE>"
119 else 179 else
120 workingdir="${PWD}"
121 basefname="$(basename ${2})" 180 basefname="$(basename ${2})"
122 basedname="$(dirname ${2})" 181 basedname="$(dirname ${2})"
123 unset ARCH 182 unset ARCH
124 183
125 cd "${basedname}"
126 echo -e "e:\\n\\t@echo \$(${1})\\ninclude ${basefname}" | \ 184 echo -e "e:\\n\\t@echo \$(${1})\\ninclude ${basefname}" | \
127 make M="${S}" ${BUILD_FIXES} -s -f - 2>/dev/null 185 make -C "${basedname}" M="${S}" ${BUILD_FIXES} -s -f - 2>/dev/null
128 cd "${workingdir}"
129 186
130 ARCH=${myARCH} 187 ARCH=${myARCH}
131 fi 188 fi
132} 189}
133 190
191# @FUNCTION: getfilevar_noexec
192# @USAGE: variable configfile
193# @RETURN: the value of the variable
194# @DESCRIPTION:
195# It detects the value of the variable defined in the file configfile.
196# This is done with sed matching an expression only. If the variable is defined,
197# you will run into problems. See getfilevar for those cases.
198getfilevar_noexec() {
199 local ERROR basefname basedname mycat myARCH="${ARCH}"
200 ERROR=0
201 mycat='cat'
202
203 [ -z "${1}" ] && ERROR=1
204 [ ! -f "${2}" ] && ERROR=1
205 [ "${2#.gz}" != "${2}" ] && mycat='zcat'
206
207 if [ "${ERROR}" = 1 ]
208 then
209 echo -e "\n"
210 eerror "getfilevar_noexec requires 2 variables, with the second a valid file."
211 eerror " getfilevar_noexec <VARIABLE> <CONFIGFILE>"
212 else
213 ${mycat} "${2}" | \
214 sed -n \
215 -e "/^[[:space:]]*${1}[[:space:]]*=[[:space:]]*\(.*\)\$/{
216 s,^[^=]*[[:space:]]*=[[:space:]]*,,g ;
217 s,[[:space:]]*\$,,g ;
218 p
219 }"
220 fi
221}
222
223
224# @FUNCTION: linux_config_src_exists
225# @RETURN: true or false
226# @DESCRIPTION:
227# It returns true if .config exists in a build directory otherwise false
228linux_config_src_exists() {
229 [ -s "${KV_OUT_DIR}/.config" ]
230}
231
232# @FUNCTION: linux_config_bin_exists
233# @RETURN: true or false
234# @DESCRIPTION:
235# It returns true if .config exists in /proc, otherwise false
236linux_config_bin_exists() {
237 [ -s "/proc/config.gz" ]
238}
239
240# @FUNCTION: linux_config_exists
241# @RETURN: true or false
242# @DESCRIPTION:
243# It returns true if .config exists otherwise false
244#
245# This function MUST be checked before using any of the linux_chkconfig_*
246# functions.
247linux_config_exists() {
248 linux_config_src_exists || linux_config_bin_exists
249}
250
251# @FUNCTION: require_configured_kernel
252# @DESCRIPTION:
253# This function verifies that the current kernel is configured (it checks against the existence of .config)
254# otherwise it dies.
255require_configured_kernel() {
256 if ! linux_config_src_exists; then
257 qeerror "Could not find a usable .config in the kernel source directory."
258 qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources."
259 qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that"
260 qeerror "it points to the necessary object directory so that it might find .config."
261 die "Kernel not configured; no .config found in ${KV_OUT_DIR}"
262 fi
263}
264
265# @FUNCTION: linux_chkconfig_present
266# @USAGE: option
267# @RETURN: true or false
268# @DESCRIPTION:
269# It checks that CONFIG_<option>=y or CONFIG_<option>=m is present in the current kernel .config
270# If linux_config_exists returns false, the results of this are UNDEFINED. You
271# MUST call linux_config_exists first.
134linux_chkconfig_present() { 272linux_chkconfig_present() {
135local RESULT 273local RESULT
274 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
275 local config
276 config="${KV_OUT_DIR}/.config"
277 [ ! -f "${config}" ] && config="/proc/config.gz"
136 RESULT="$(getfilevar CONFIG_${1} ${KV_OUT_DIR}/.config)" 278 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
137 [ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1 279 [ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1
138} 280}
139 281
282# @FUNCTION: linux_chkconfig_module
283# @USAGE: option
284# @RETURN: true or false
285# @DESCRIPTION:
286# It checks that CONFIG_<option>=m is present in the current kernel .config
287# If linux_config_exists returns false, the results of this are UNDEFINED. You
288# MUST call linux_config_exists first.
140linux_chkconfig_module() { 289linux_chkconfig_module() {
141local RESULT 290local RESULT
291 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
292 local config
293 config="${KV_OUT_DIR}/.config"
294 [ ! -f "${config}" ] && config="/proc/config.gz"
142 RESULT="$(getfilevar CONFIG_${1} ${KV_OUT_DIR}/.config)" 295 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
143 [ "${RESULT}" = "m" ] && return 0 || return 1 296 [ "${RESULT}" = "m" ] && return 0 || return 1
144} 297}
145 298
299# @FUNCTION: linux_chkconfig_builtin
300# @USAGE: option
301# @RETURN: true or false
302# @DESCRIPTION:
303# It checks that CONFIG_<option>=y 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.
146linux_chkconfig_builtin() { 306linux_chkconfig_builtin() {
147local RESULT 307local RESULT
308 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
309 local config
310 config="${KV_OUT_DIR}/.config"
311 [ ! -f "${config}" ] && config="/proc/config.gz"
148 RESULT="$(getfilevar CONFIG_${1} ${KV_OUT_DIR}/.config)" 312 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
149 [ "${RESULT}" = "y" ] && return 0 || return 1 313 [ "${RESULT}" = "y" ] && return 0 || return 1
150} 314}
151 315
316# @FUNCTION: linux_chkconfig_string
317# @USAGE: option
318# @RETURN: CONFIG_<option>
319# @DESCRIPTION:
320# It prints the CONFIG_<option> value of the current kernel .config (it requires a configured kernel).
321# If linux_config_exists returns false, the results of this are UNDEFINED. You
322# MUST call linux_config_exists first.
152linux_chkconfig_string() { 323linux_chkconfig_string() {
324 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
325 local config
326 config="${KV_OUT_DIR}/.config"
327 [ ! -f "${config}" ] && config="/proc/config.gz"
153 getfilevar "CONFIG_${1}" "${KV_OUT_DIR}/.config" 328 getfilevar_noexec "CONFIG_${1}" "${config}"
154} 329}
155 330
156# Versioning Functions 331# Versioning Functions
157# --------------------------------------- 332# ---------------------------------------
158 333
159# kernel_is returns true when the version is the same as the passed version 334# @FUNCTION: kernel_is
335# @USAGE: [-lt -gt -le -ge -eq] major_number [minor_number patch_number]
336# @RETURN: true or false
337# @DESCRIPTION:
338# It returns true when the current kernel version satisfies the comparison against the passed version.
339# -eq is the default comparison.
160# 340#
341# @CODE
161# For Example where KV = 2.6.9 342# For Example where KV = 2.6.9
162# kernel_is 2 4 returns false 343# kernel_is 2 4 returns false
163# kernel_is 2 returns true 344# kernel_is 2 returns true
164# kernel_is 2 6 returns true 345# kernel_is 2 6 returns true
165# kernel_is 2 6 8 returns false 346# kernel_is 2 6 8 returns false
166# kernel_is 2 6 9 returns true 347# kernel_is 2 6 9 returns true
167# 348# @CODE
349
168# got the jist yet? 350# got the jist yet?
169 351
170kernel_is() { 352kernel_is() {
171 # if we haven't determined the version yet, we need too. 353 # if we haven't determined the version yet, we need to.
172 get_version; 354 get_version
173 local operator test value x=0 y=0 z=0 355 local operator test value x=0 y=0 z=0
174 356
175 case ${1} in 357 case ${1} in
176 lt) operator="-lt"; shift;; 358 lt) operator="-lt"; shift;;
177 gt) operator="-gt"; shift;; 359 gt) operator="-gt"; shift;;
194 3) for((y=0; y<$((3 - ${#KV_PATCH})); y++)); do test="${test}0"; done; 376 3) for((y=0; y<$((3 - ${#KV_PATCH})); y++)); do test="${test}0"; done;
195 test="${test}${KV_PATCH}";; 377 test="${test}${KV_PATCH}";;
196 *) die "Error in kernel-2_kernel_is(): Too many parameters.";; 378 *) die "Error in kernel-2_kernel_is(): Too many parameters.";;
197 esac 379 esac
198 done 380 done
199 381
200 [ ${test} ${operator} ${value} ] && return 0 || return 1 382 [ ${test} ${operator} ${value} ] && return 0 || return 1
201} 383}
202 384
203get_localversion() { 385get_localversion() {
204 local lv_list i x 386 local lv_list i x
213 done 395 done
214 x=${x/ /} 396 x=${x/ /}
215 echo ${x} 397 echo ${x}
216} 398}
217 399
400# @FUNCTION: get_version
401# @DESCRIPTION:
402# It gets the version of the kernel inside KERNEL_DIR and populates the KV_FULL variable
403# (if KV_FULL is already set it does nothing).
404#
405# The kernel version variables (KV_MAJOR, KV_MINOR, KV_PATCH, KV_EXTRA and KV_LOCAL) are also set.
406#
407# The KV_DIR is set using the KERNEL_DIR env var, the KV_DIR_OUT is set using a valid
408# KBUILD_OUTPUT (in a decreasing priority list, we look for the env var, makefile var or the
409# symlink /lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build).
218get_version() { 410get_version() {
219 local kbuild_output 411 local kbuild_output
220 412
221 # no need to execute this twice assuming KV_FULL is populated. 413 # no need to execute this twice assuming KV_FULL is populated.
222 # we can force by unsetting KV_FULL 414 # we can force by unsetting KV_FULL
260 # so we better find it eh? 452 # so we better find it eh?
261 # do we pass KBUILD_OUTPUT on the CLI? 453 # do we pass KBUILD_OUTPUT on the CLI?
262 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}" 454 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}"
263 455
264 # And if we didn't pass it, we can take a nosey in the Makefile 456 # And if we didn't pass it, we can take a nosey in the Makefile
265 kbuild_output="$(getfilevar KBUILD_OUTPUT ${KV_DIR}/Makefile)" 457 kbuild_output="$(getfilevar_noexec KBUILD_OUTPUT ${KV_DIR}/Makefile)"
266 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}" 458 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
267 459
268 # And contrary to existing functions I feel we shouldn't trust the 460 # And contrary to existing functions I feel we shouldn't trust the
269 # directory name to find version information as this seems insane. 461 # directory name to find version information as this seems insane.
270 # so we parse ${KV_DIR}/Makefile 462 # so we parse ${KV_DIR}/Makefile
271 KV_MAJOR="$(getfilevar VERSION ${KV_DIR}/Makefile)" 463 KV_MAJOR="$(getfilevar_noexec VERSION ${KV_DIR}/Makefile)"
272 KV_MINOR="$(getfilevar PATCHLEVEL ${KV_DIR}/Makefile)" 464 KV_MINOR="$(getfilevar_noexec PATCHLEVEL ${KV_DIR}/Makefile)"
273 KV_PATCH="$(getfilevar SUBLEVEL ${KV_DIR}/Makefile)" 465 KV_PATCH="$(getfilevar_noexec SUBLEVEL ${KV_DIR}/Makefile)"
274 KV_EXTRA="$(getfilevar EXTRAVERSION ${KV_DIR}/Makefile)" 466 KV_EXTRA="$(getfilevar_noexec EXTRAVERSION ${KV_DIR}/Makefile)"
275 467
276 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ] 468 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
277 then 469 then
278 qeerror "Could not detect kernel version." 470 qeerror "Could not detect kernel version."
279 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources." 471 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
297 KV_LOCAL="$(get_localversion ${KV_OUT_DIR})" 489 KV_LOCAL="$(get_localversion ${KV_OUT_DIR})"
298 fi 490 fi
299 # and if we STILL have not got it, then we better just set it to KV_DIR 491 # and if we STILL have not got it, then we better just set it to KV_DIR
300 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}" 492 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
301 493
302 if [ ! -s "${KV_OUT_DIR}/.config" ]
303 then
304 qeerror "Could not find a usable .config in the kernel source directory."
305 qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources."
306 qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that"
307 qeerror "it points to the necessary object directory so that it might find .config."
308 return 1
309 fi
310
311 KV_LOCAL="${KV_LOCAL}$(get_localversion ${KV_DIR})" 494 KV_LOCAL="${KV_LOCAL}$(get_localversion ${KV_DIR})"
495 if linux_config_exists; then
312 KV_LOCAL="${KV_LOCAL}$(linux_chkconfig_string LOCALVERSION)" 496 KV_LOCAL="${KV_LOCAL}$(linux_chkconfig_string LOCALVERSION)"
313 KV_LOCAL="${KV_LOCAL//\"/}" 497 KV_LOCAL="${KV_LOCAL//\"/}"
314 498
315 # For things like git that can append extra stuff: 499 # For things like git that can append extra stuff:
316 [ -e ${KV_DIR}/scripts/setlocalversion ] && 500 [ -e ${KV_DIR}/scripts/setlocalversion ] &&
317 linux_chkconfig_builtin LOCALVERSION_AUTO && 501 linux_chkconfig_builtin LOCALVERSION_AUTO &&
318 KV_LOCAL="${KV_LOCAL}$(sh ${KV_DIR}/scripts/setlocalversion ${KV_DIR})" 502 KV_LOCAL="${KV_LOCAL}$(sh ${KV_DIR}/scripts/setlocalversion ${KV_DIR})"
503 fi
319 504
320 # And we should set KV_FULL to the full expanded version 505 # And we should set KV_FULL to the full expanded version
321 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}" 506 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
322 507
323 qeinfo "Found sources for kernel version:" 508 qeinfo "Found sources for kernel version:"
324 qeinfo " ${KV_FULL}" 509 qeinfo " ${KV_FULL}"
325 510
326 return 0 511 return 0
327} 512}
328 513
514# @FUNCTION: get_running_version
515# @DESCRIPTION:
516# It gets the version of the current running kernel and the result is the same as get_version() if the
517# function can find the sources.
329get_running_version() { 518get_running_version() {
330 KV_FULL=$(uname -r) 519 KV_FULL=$(uname -r)
331 520
332 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then 521 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
333 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source) 522 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
352 541
353 542
354# ebuild check functions 543# ebuild check functions
355# --------------------------------------- 544# ---------------------------------------
356 545
546# @FUNCTION: check_kernel_built
547# @DESCRIPTION:
548# This function verifies that the current kernel sources have been already prepared otherwise it dies.
357check_kernel_built() { 549check_kernel_built() {
358 # if we haven't determined the version yet, we need too. 550 # if we haven't determined the version yet, we need to
551 require_configured_kernel
359 get_version; 552 get_version
360 553
361 if [ ! -f "${KV_OUT_DIR}/include/linux/version.h" ] 554 if [ ! -f "${KV_OUT_DIR}/include/linux/version.h" ]
362 then 555 then
363 eerror "These sources have not yet been prepared." 556 eerror "These sources have not yet been prepared."
364 eerror "We cannot build against an unprepared tree." 557 eerror "We cannot build against an unprepared tree."
371 eerror "Then please try merging this module again." 564 eerror "Then please try merging this module again."
372 die "Kernel sources need compiling first" 565 die "Kernel sources need compiling first"
373 fi 566 fi
374} 567}
375 568
569# @FUNCTION: check_modules_supported
570# @DESCRIPTION:
571# This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
376check_modules_supported() { 572check_modules_supported() {
377 # if we haven't determined the version yet, we need too. 573 # if we haven't determined the version yet, we need too.
574 require_configured_kernel
378 get_version; 575 get_version
379 576
380 if ! linux_chkconfig_builtin "MODULES" 577 if ! linux_chkconfig_builtin "MODULES"
381 then 578 then
382 eerror "These sources do not support loading external modules." 579 eerror "These sources do not support loading external modules."
383 eerror "to be able to use this module please enable \"Loadable modules support\"" 580 eerror "to be able to use this module please enable \"Loadable modules support\""
384 eerror "in your kernel, recompile and then try merging this module again." 581 eerror "in your kernel, recompile and then try merging this module again."
385 die "No support for external modules in ${KV_FULL} config" 582 die "No support for external modules in ${KV_FULL} config"
386 fi 583 fi
387} 584}
388 585
586# @FUNCTION: check_extra_config
587# @DESCRIPTION:
588# It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
589# the prefix ~ is not used) doesn't satisfy the directive.
389check_extra_config() { 590check_extra_config() {
390 local config negate die error reworkmodulenames 591 local config negate die error reworkmodulenames
391 local soft_errors_count=0 hard_errors_count=0 592 local soft_errors_count=0 hard_errors_count=0 config_required=0
392 593
393 # if we haven't determined the version yet, we need too. 594 # if we haven't determined the version yet, we need to
394 get_version; 595 get_version
596
597 # Determine if we really need a .config. The only time when we don't need
598 # one is when all of the CONFIG_CHECK options are prefixed with "~".
599 for config in ${CONFIG_CHECK}
600 do
601 if [[ "${config:0:1}" != "~" ]]; then
602 config_required=1
603 break
604 fi
605 done
606
607 if [[ ${config_required} == 0 ]]; then
608 # In the case where we don't require a .config, we can now bail out
609 # if the user has no .config as there is nothing to do. Otherwise
610 # code later will cause a failure due to missing .config.
611 if ! linux_config_exists; then
612 ewarn "Unable to check for the following kernel config options due"
613 ewarn "to absence of any configured kernel sources:"
614 for config in ${CONFIG_CHECK}; do
615 ewarn " - ${config#\~}"
616 done
617 ewarn "You're on your own to make sure they are set if needed."
618 return 0
619 fi
620 else
621 require_configured_kernel
622 fi
395 623
396 einfo "Checking for suitable kernel configuration options..." 624 einfo "Checking for suitable kernel configuration options..."
625
397 for config in ${CONFIG_CHECK} 626 for config in ${CONFIG_CHECK}
398 do 627 do
399 # if we specify any fatal, ensure we honor them 628 # if we specify any fatal, ensure we honor them
400 die=1 629 die=1
401 error=0 630 error=0
402 negate=0 631 negate=0
403 reworkmodulenames=0 632 reworkmodulenames=0
404 633
405 if [[ -z ${config/\~*} ]]; then 634 if [[ ${config:0:1} == "~" ]]; then
406 die=0 635 die=0
407 config=${config:1} 636 config=${config:1}
408 elif [[ -z ${config/\@*} ]]; then 637 elif [[ ${config:0:1} == "@" ]]; then
409 die=0 638 die=0
410 reworkmodulenames=1 639 reworkmodulenames=1
411 config=${config:1} 640 config=${config:1}
412 fi 641 fi
413 if [[ -z ${config//\!*} ]]; then 642 if [[ ${config:0:1} == "!" ]]; then
414 negate=1 643 negate=1
415 config=${config:1} 644 config=${config:1}
416 fi 645 fi
417 646
418 if [[ ${negate} == 1 ]]; then 647 if [[ ${negate} == 1 ]]; then
480 eend 0 709 eend 0
481 fi 710 fi
482} 711}
483 712
484check_zlibinflate() { 713check_zlibinflate() {
485 # if we haven't determined the version yet, we need too. 714 # if we haven't determined the version yet, we need to
715 require_configured_kernel
486 get_version; 716 get_version
487 717
488 # although I restructured this code - I really really really dont support it! 718 # although I restructured this code - I really really really dont support it!
489 719
490 # bug #27882 - zlib routines are only linked into the kernel 720 # bug #27882 - zlib routines are only linked into the kernel
491 # if something compiled into the kernel calls them 721 # if something compiled into the kernel calls them
498 local DEFLATE 728 local DEFLATE
499 729
500 einfo "Determining the usability of ZLIB_INFLATE support in your kernel" 730 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
501 731
502 ebegin "checking ZLIB_INFLATE" 732 ebegin "checking ZLIB_INFLATE"
503 getfilevar_isbuiltin CONFIG_ZLIB_INFLATE ${KV_DIR}/.config 733 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
504 eend $? 734 eend $?
505 [ "$?" != 0 ] && die 735 [ "$?" != 0 ] && die
506 736
507 ebegin "checking ZLIB_DEFLATE" 737 ebegin "checking ZLIB_DEFLATE"
508 getfilevar_isbuiltin CONFIG_ZLIB_DEFLATE ${KV_DIR}/.config 738 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
509 eend $? 739 eend $?
510 [ "$?" != 0 ] && die 740 [ "$?" != 0 ] && die
511 741
512 local LINENO_START 742 local LINENO_START
513 local LINENO_END 743 local LINENO_END
551} 781}
552 782
553################################ 783################################
554# Default pkg_setup 784# Default pkg_setup
555# Also used when inheriting linux-mod to force a get_version call 785# Also used when inheriting linux-mod to force a get_version call
556 786# @FUNCTION: linux-info_pkg_setup
787# @DESCRIPTION:
788# Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
789# to support the options specified in CONFIG_CHECK (if not null)
557linux-info_pkg_setup() { 790linux-info_pkg_setup() {
558 get_version || die "Unable to calculate Linux Kernel version" 791 get_version
792 if [[ $rc -ne 0 ]]; then
793 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
794 get_running_version
795 fi
559 796
560 if kernel_is 2 4; then 797 if kernel_is 2 4; then
561 if [ "$( gcc-major-version )" -eq "4" ] ; then 798 if [ "$( gcc-major-version )" -eq "4" ] ; then
562 echo 799 echo
563 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with" 800 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"

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