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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 1.51 2007/10/01 13:16:44 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/linux-info.eclass,v 1.63 2009/09/06 23:04:37 robbat2 Exp $
4# 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#
11# Maintainer: John Mylchreest <johnm@gentoo.org> 5# Original author: John Mylchreest <johnm@gentoo.org>
12# Copyright 2004 Gentoo Linux 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 :)
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.
15 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 ${x}
216} 398}
217 399
400# internal variable, so we know to only print the warning once
401get_version_warning_done=
402
403# @FUNCTION: get_version
404# @DESCRIPTION:
405# It gets the version of the kernel inside KERNEL_DIR and populates the KV_FULL variable
406# (if KV_FULL is already set it does nothing).
407#
408# The kernel version variables (KV_MAJOR, KV_MINOR, KV_PATCH, KV_EXTRA and KV_LOCAL) are also set.
409#
410# The KV_DIR is set using the KERNEL_DIR env var, the KV_DIR_OUT is set using a valid
411# KBUILD_OUTPUT (in a decreasing priority list, we look for the env var, makefile var or the
412# symlink /lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build).
218get_version() { 413get_version() {
219 local kbuild_output 414 local kbuild_output
220 415
221 # no need to execute this twice assuming KV_FULL is populated. 416 # no need to execute this twice assuming KV_FULL is populated.
222 # we can force by unsetting KV_FULL 417 # we can force by unsetting KV_FULL
225 # if we dont know KV_FULL, then we need too. 420 # if we dont know KV_FULL, then we need too.
226 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR 421 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
227 unset KV_DIR 422 unset KV_DIR
228 423
229 # KV_DIR will contain the full path to the sources directory we should use 424 # KV_DIR will contain the full path to the sources directory we should use
425 [ -z "${get_version_warning_done}" ] && \
230 qeinfo "Determining the location of the kernel source code" 426 qeinfo "Determining the location of the kernel source code"
231 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})" 427 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
232 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}" 428 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
233 429
234 if [ -z "${KV_DIR}" ] 430 if [ -z "${KV_DIR}" ]
235 then 431 then
432 if [ -z "${get_version_warning_done}" ]; then
433 get_version_warning_done=1
236 qeerror "Unable to find kernel sources at ${KERNEL_DIR}" 434 qeerror "Unable to find kernel sources at ${KERNEL_DIR}"
237 qeinfo "This package requires Linux sources." 435 #qeinfo "This package requires Linux sources."
238 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then 436 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
239 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, " 437 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
240 qeinfo "(or the kernel you wish to build against)." 438 qeinfo "(or the kernel you wish to build against)."
241 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location" 439 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
242 else 440 else
243 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against." 441 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
442 fi
244 fi 443 fi
245 return 1 444 return 1
246 fi 445 fi
247 446
447 if [ -z "${get_version_warning_done}" ]; then
248 qeinfo "Found kernel source directory:" 448 qeinfo "Found kernel source directory:"
249 qeinfo " ${KV_DIR}" 449 qeinfo " ${KV_DIR}"
450 fi
250 451
251 if [ ! -s "${KV_DIR}/Makefile" ] 452 if [ ! -s "${KV_DIR}/Makefile" ]
252 then 453 then
454 if [ -z "${get_version_warning_done}" ]; then
455 get_version_warning_done=1
253 qeerror "Could not find a Makefile in the kernel source directory." 456 qeerror "Could not find a Makefile in the kernel source directory."
254 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources" 457 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
458 fi
255 return 1 459 return 1
256 fi 460 fi
257 461
258 # OK so now we know our sources directory, but they might be using 462 # OK so now we know our sources directory, but they might be using
259 # KBUILD_OUTPUT, and we need this for .config and localversions-* 463 # KBUILD_OUTPUT, and we need this for .config and localversions-*
260 # so we better find it eh? 464 # so we better find it eh?
261 # do we pass KBUILD_OUTPUT on the CLI? 465 # do we pass KBUILD_OUTPUT on the CLI?
262 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}" 466 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}"
263 467
264 # And if we didn't pass it, we can take a nosey in the Makefile 468 # And if we didn't pass it, we can take a nosey in the Makefile
265 kbuild_output="$(getfilevar KBUILD_OUTPUT ${KV_DIR}/Makefile)" 469 kbuild_output="$(getfilevar_noexec KBUILD_OUTPUT ${KV_DIR}/Makefile)"
266 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}" 470 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
267 471
268 # And contrary to existing functions I feel we shouldn't trust the 472 # And contrary to existing functions I feel we shouldn't trust the
269 # directory name to find version information as this seems insane. 473 # directory name to find version information as this seems insane.
270 # so we parse ${KV_DIR}/Makefile 474 # so we parse ${KV_DIR}/Makefile
271 KV_MAJOR="$(getfilevar VERSION ${KV_DIR}/Makefile)" 475 KV_MAJOR="$(getfilevar_noexec VERSION ${KV_DIR}/Makefile)"
272 KV_MINOR="$(getfilevar PATCHLEVEL ${KV_DIR}/Makefile)" 476 KV_MINOR="$(getfilevar_noexec PATCHLEVEL ${KV_DIR}/Makefile)"
273 KV_PATCH="$(getfilevar SUBLEVEL ${KV_DIR}/Makefile)" 477 KV_PATCH="$(getfilevar_noexec SUBLEVEL ${KV_DIR}/Makefile)"
274 KV_EXTRA="$(getfilevar EXTRAVERSION ${KV_DIR}/Makefile)" 478 KV_EXTRA="$(getfilevar_noexec EXTRAVERSION ${KV_DIR}/Makefile)"
275 479
276 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ] 480 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
277 then 481 then
482 if [ -z "${get_version_warning_done}" ]; then
483 get_version_warning_done=1
278 qeerror "Could not detect kernel version." 484 qeerror "Could not detect kernel version."
279 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources." 485 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
486 fi
280 return 1 487 return 1
281 fi 488 fi
282 489
283 # and in newer versions we can also pull LOCALVERSION if it is set. 490 # and in newer versions we can also pull LOCALVERSION if it is set.
284 # but before we do this, we need to find if we use a different object directory. 491 # but before we do this, we need to find if we use a different object directory.
297 KV_LOCAL="$(get_localversion ${KV_OUT_DIR})" 504 KV_LOCAL="$(get_localversion ${KV_OUT_DIR})"
298 fi 505 fi
299 # and if we STILL have not got it, then we better just set it to KV_DIR 506 # and if we STILL have not got it, then we better just set it to KV_DIR
300 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}" 507 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
301 508
302 if [ ! -s "${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 ${KV_DIR})" 509 KV_LOCAL="${KV_LOCAL}$(get_localversion ${KV_DIR})"
510 if linux_config_exists; then
312 KV_LOCAL="${KV_LOCAL}$(linux_chkconfig_string LOCALVERSION)" 511 KV_LOCAL="${KV_LOCAL}$(linux_chkconfig_string LOCALVERSION)"
313 KV_LOCAL="${KV_LOCAL//\"/}" 512 KV_LOCAL="${KV_LOCAL//\"/}"
314 513
315 # For things like git that can append extra stuff: 514 # For things like git that can append extra stuff:
316 [ -e ${KV_DIR}/scripts/setlocalversion ] && 515 [ -e ${KV_DIR}/scripts/setlocalversion ] &&
317 linux_chkconfig_builtin LOCALVERSION_AUTO && 516 linux_chkconfig_builtin LOCALVERSION_AUTO &&
318 KV_LOCAL="${KV_LOCAL}$(sh ${KV_DIR}/scripts/setlocalversion ${KV_DIR})" 517 KV_LOCAL="${KV_LOCAL}$(sh ${KV_DIR}/scripts/setlocalversion ${KV_DIR})"
518 fi
319 519
320 # And we should set KV_FULL to the full expanded version 520 # And we should set KV_FULL to the full expanded version
321 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}" 521 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
322 522
323 qeinfo "Found sources for kernel version:" 523 qeinfo "Found sources for kernel version:"
324 qeinfo " ${KV_FULL}" 524 qeinfo " ${KV_FULL}"
325 525
326 return 0 526 return 0
327} 527}
328 528
529# @FUNCTION: get_running_version
530# @DESCRIPTION:
531# It gets the version of the current running kernel and the result is the same as get_version() if the
532# function can find the sources.
329get_running_version() { 533get_running_version() {
330 KV_FULL=$(uname -r) 534 KV_FULL=$(uname -r)
331 535
332 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then 536 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
333 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source) 537 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
352 556
353 557
354# ebuild check functions 558# ebuild check functions
355# --------------------------------------- 559# ---------------------------------------
356 560
561# @FUNCTION: check_kernel_built
562# @DESCRIPTION:
563# This function verifies that the current kernel sources have been already prepared otherwise it dies.
357check_kernel_built() { 564check_kernel_built() {
358 # if we haven't determined the version yet, we need too. 565 # if we haven't determined the version yet, we need to
566 require_configured_kernel
359 get_version; 567 get_version
360 568
361 if [ ! -f "${KV_OUT_DIR}/include/linux/version.h" ] 569 if [ ! -f "${KV_OUT_DIR}/include/linux/version.h" ]
362 then 570 then
363 eerror "These sources have not yet been prepared." 571 eerror "These sources have not yet been prepared."
364 eerror "We cannot build against an unprepared tree." 572 eerror "We cannot build against an unprepared tree."
371 eerror "Then please try merging this module again." 579 eerror "Then please try merging this module again."
372 die "Kernel sources need compiling first" 580 die "Kernel sources need compiling first"
373 fi 581 fi
374} 582}
375 583
584# @FUNCTION: check_modules_supported
585# @DESCRIPTION:
586# This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
376check_modules_supported() { 587check_modules_supported() {
377 # if we haven't determined the version yet, we need too. 588 # if we haven't determined the version yet, we need too.
589 require_configured_kernel
378 get_version; 590 get_version
379 591
380 if ! linux_chkconfig_builtin "MODULES" 592 if ! linux_chkconfig_builtin "MODULES"
381 then 593 then
382 eerror "These sources do not support loading external modules." 594 eerror "These sources do not support loading external modules."
383 eerror "to be able to use this module please enable \"Loadable modules support\"" 595 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." 596 eerror "in your kernel, recompile and then try merging this module again."
385 die "No support for external modules in ${KV_FULL} config" 597 die "No support for external modules in ${KV_FULL} config"
386 fi 598 fi
387} 599}
388 600
601# @FUNCTION: check_extra_config
602# @DESCRIPTION:
603# It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
604# the prefix ~ is not used) doesn't satisfy the directive.
389check_extra_config() { 605check_extra_config() {
390 local config negate die error reworkmodulenames 606 local config negate die error reworkmodulenames
391 local soft_errors_count=0 hard_errors_count=0 607 local soft_errors_count=0 hard_errors_count=0 config_required=0
392 608
393 # if we haven't determined the version yet, we need too. 609 # if we haven't determined the version yet, we need to
394 get_version; 610 get_version
611
612 # Determine if we really need a .config. The only time when we don't need
613 # one is when all of the CONFIG_CHECK options are prefixed with "~".
614 for config in ${CONFIG_CHECK}
615 do
616 if [[ "${config:0:1}" != "~" ]]; then
617 config_required=1
618 break
619 fi
620 done
621
622 if [[ ${config_required} == 0 ]]; then
623 # In the case where we don't require a .config, we can now bail out
624 # if the user has no .config as there is nothing to do. Otherwise
625 # code later will cause a failure due to missing .config.
626 if ! linux_config_exists; then
627 ewarn "Unable to check for the following kernel config options due"
628 ewarn "to absence of any configured kernel sources:"
629 for config in ${CONFIG_CHECK}; do
630 ewarn " - ${config#\~}"
631 done
632 ewarn "You're on your own to make sure they are set if needed."
633 return 0
634 fi
635 else
636 require_configured_kernel
637 fi
395 638
396 einfo "Checking for suitable kernel configuration options..." 639 einfo "Checking for suitable kernel configuration options..."
640
397 for config in ${CONFIG_CHECK} 641 for config in ${CONFIG_CHECK}
398 do 642 do
399 # if we specify any fatal, ensure we honor them 643 # if we specify any fatal, ensure we honor them
400 die=1 644 die=1
401 error=0 645 error=0
402 negate=0 646 negate=0
403 reworkmodulenames=0 647 reworkmodulenames=0
404 648
405 if [[ -z ${config/\~*} ]]; then 649 if [[ ${config:0:1} == "~" ]]; then
406 die=0 650 die=0
407 config=${config:1} 651 config=${config:1}
408 elif [[ -z ${config/\@*} ]]; then 652 elif [[ ${config:0:1} == "@" ]]; then
409 die=0 653 die=0
410 reworkmodulenames=1 654 reworkmodulenames=1
411 config=${config:1} 655 config=${config:1}
412 fi 656 fi
413 if [[ -z ${config//\!*} ]]; then 657 if [[ ${config:0:1} == "!" ]]; then
414 negate=1 658 negate=1
415 config=${config:1} 659 config=${config:1}
416 fi 660 fi
417 661
418 if [[ ${negate} == 1 ]]; then 662 if [[ ${negate} == 1 ]]; then
480 eend 0 724 eend 0
481 fi 725 fi
482} 726}
483 727
484check_zlibinflate() { 728check_zlibinflate() {
485 # if we haven't determined the version yet, we need too. 729 # if we haven't determined the version yet, we need to
730 require_configured_kernel
486 get_version; 731 get_version
487 732
488 # although I restructured this code - I really really really dont support it! 733 # although I restructured this code - I really really really dont support it!
489 734
490 # bug #27882 - zlib routines are only linked into the kernel 735 # bug #27882 - zlib routines are only linked into the kernel
491 # if something compiled into the kernel calls them 736 # if something compiled into the kernel calls them
498 local DEFLATE 743 local DEFLATE
499 744
500 einfo "Determining the usability of ZLIB_INFLATE support in your kernel" 745 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
501 746
502 ebegin "checking ZLIB_INFLATE" 747 ebegin "checking ZLIB_INFLATE"
503 getfilevar_isbuiltin CONFIG_ZLIB_INFLATE ${KV_DIR}/.config 748 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
504 eend $? 749 eend $?
505 [ "$?" != 0 ] && die 750 [ "$?" != 0 ] && die
506 751
507 ebegin "checking ZLIB_DEFLATE" 752 ebegin "checking ZLIB_DEFLATE"
508 getfilevar_isbuiltin CONFIG_ZLIB_DEFLATE ${KV_DIR}/.config 753 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
509 eend $? 754 eend $?
510 [ "$?" != 0 ] && die 755 [ "$?" != 0 ] && die
511 756
512 local LINENO_START 757 local LINENO_START
513 local LINENO_END 758 local LINENO_END
551} 796}
552 797
553################################ 798################################
554# Default pkg_setup 799# Default pkg_setup
555# Also used when inheriting linux-mod to force a get_version call 800# Also used when inheriting linux-mod to force a get_version call
556 801# @FUNCTION: linux-info_pkg_setup
802# @DESCRIPTION:
803# Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
804# to support the options specified in CONFIG_CHECK (if not null)
557linux-info_pkg_setup() { 805linux-info_pkg_setup() {
558 get_version || die "Unable to calculate Linux Kernel version" 806 get_version
807 if [[ $rc -ne 0 ]]; then
808 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
809 get_running_version
810 fi
559 811
560 if kernel_is 2 4; then 812 if kernel_is 2 4; then
561 if [ "$( gcc-major-version )" -eq "4" ] ; then 813 if [ "$( gcc-major-version )" -eq "4" ] ; then
562 echo 814 echo
563 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with" 815 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"

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