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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 1.71 2009/09/08 12:34:21 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
56 112
113DEPEND=""
114RDEPEND=""
115
116[ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && \
57DEPEND="kernel_linux? ( virtual/linux-sources )" 117DEPEND="kernel_linux? ( virtual/linux-sources )"
58RDEPEND=""
59 118
60# Overwritable environment Var's 119# Overwritable environment Var's
61# --------------------------------------- 120# ---------------------------------------
62KERNEL_DIR="${KERNEL_DIR:-${ROOT}usr/src/linux}" 121KERNEL_DIR="${KERNEL_DIR:-${ROOT}usr/src/linux}"
63 122
99qeerror() { qout eerror "${@}" ; } 158qeerror() { qout eerror "${@}" ; }
100 159
101# File Functions 160# File Functions
102# --------------------------------------- 161# ---------------------------------------
103 162
104# getfilevar accepts 2 vars as follows: 163# @FUNCTION: getfilevar
105# getfilevar <VARIABLE> <CONFIGFILE> 164# @USAGE: variable configfile
106 165# @RETURN: the value of the variable
166# @DESCRIPTION:
167# It detects the value of the variable defined in the file configfile. This is
168# done by including the configfile, and printing the variable with Make.
169# It WILL break if your makefile has missing dependencies!
107getfilevar() { 170getfilevar() {
108local ERROR workingdir basefname basedname myARCH="${ARCH}" 171local ERROR basefname basedname myARCH="${ARCH}"
109 ERROR=0 172 ERROR=0
110 173
111 [ -z "${1}" ] && ERROR=1 174 [ -z "${1}" ] && ERROR=1
112 [ ! -f "${2}" ] && ERROR=1 175 [ ! -f "${2}" ] && ERROR=1
113 176
115 then 178 then
116 echo -e "\n" 179 echo -e "\n"
117 eerror "getfilevar requires 2 variables, with the second a valid file." 180 eerror "getfilevar requires 2 variables, with the second a valid file."
118 eerror " getfilevar <VARIABLE> <CONFIGFILE>" 181 eerror " getfilevar <VARIABLE> <CONFIGFILE>"
119 else 182 else
120 workingdir="${PWD}"
121 basefname="$(basename ${2})" 183 basefname="$(basename ${2})"
122 basedname="$(dirname ${2})" 184 basedname="$(dirname ${2})"
123 unset ARCH 185 unset ARCH
124 186
125 cd "${basedname}"
126 echo -e "e:\\n\\t@echo \$(${1})\\ninclude ${basefname}" | \ 187 echo -e "e:\\n\\t@echo \$(${1})\\ninclude ${basefname}" | \
127 make M="${S}" ${BUILD_FIXES} -s -f - 2>/dev/null 188 make -C "${basedname}" M="${S}" ${BUILD_FIXES} -s -f - 2>/dev/null
128 cd "${workingdir}"
129 189
130 ARCH=${myARCH} 190 ARCH=${myARCH}
131 fi 191 fi
132} 192}
133 193
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.
201getfilevar_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
231linux_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
239linux_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.
250linux_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.
258require_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 ${KV_OUT_DIR}"
265 fi
266}
267
268# @FUNCTION: linux_chkconfig_present
269# @USAGE: option
270# @RETURN: true or false
271# @DESCRIPTION:
272# It checks that CONFIG_<option>=y or CONFIG_<option>=m is present in the current kernel .config
273# If linux_config_exists returns false, the results of this are UNDEFINED. You
274# MUST call linux_config_exists first.
134linux_chkconfig_present() { 275linux_chkconfig_present() {
135local RESULT 276local RESULT
277 [ -z "${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"
136 RESULT="$(getfilevar CONFIG_${1} ${KV_OUT_DIR}/.config)" 281 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
137 [ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1 282 [ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1
138} 283}
139 284
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.
140linux_chkconfig_module() { 292linux_chkconfig_module() {
141local RESULT 293local RESULT
294 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
295 local config
296 config="${KV_OUT_DIR}/.config"
297 [ ! -f "${config}" ] && config="/proc/config.gz"
142 RESULT="$(getfilevar CONFIG_${1} ${KV_OUT_DIR}/.config)" 298 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
143 [ "${RESULT}" = "m" ] && return 0 || return 1 299 [ "${RESULT}" = "m" ] && return 0 || return 1
144} 300}
145 301
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.
146linux_chkconfig_builtin() { 309linux_chkconfig_builtin() {
147local RESULT 310local RESULT
311 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
312 local config
313 config="${KV_OUT_DIR}/.config"
314 [ ! -f "${config}" ] && config="/proc/config.gz"
148 RESULT="$(getfilevar CONFIG_${1} ${KV_OUT_DIR}/.config)" 315 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
149 [ "${RESULT}" = "y" ] && return 0 || return 1 316 [ "${RESULT}" = "y" ] && return 0 || return 1
150} 317}
151 318
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.
152linux_chkconfig_string() { 326linux_chkconfig_string() {
327 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
328 local config
329 config="${KV_OUT_DIR}/.config"
330 [ ! -f "${config}" ] && config="/proc/config.gz"
153 getfilevar "CONFIG_${1}" "${KV_OUT_DIR}/.config" 331 getfilevar_noexec "CONFIG_${1}" "${config}"
154} 332}
155 333
156# Versioning Functions 334# Versioning Functions
157# --------------------------------------- 335# ---------------------------------------
158 336
159# kernel_is returns true when the version is the same as the passed version 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.
160# 343#
344# @CODE
161# For Example where KV = 2.6.9 345# For Example where KV = 2.6.9
162# kernel_is 2 4 returns false 346# kernel_is 2 4 returns false
163# kernel_is 2 returns true 347# kernel_is 2 returns true
164# kernel_is 2 6 returns true 348# kernel_is 2 6 returns true
165# kernel_is 2 6 8 returns false 349# kernel_is 2 6 8 returns false
166# kernel_is 2 6 9 returns true 350# kernel_is 2 6 9 returns true
167# 351# @CODE
352
168# got the jist yet? 353# got the jist yet?
169 354
170kernel_is() { 355kernel_is() {
171 # if we haven't determined the version yet, we need too. 356 # if we haven't determined the version yet, we need to.
172 get_version; 357 linux-info_get_any_version
358
173 local operator test value x=0 y=0 z=0 359 local operator test value x=0 y=0 z=0
174 360
175 case ${1} in 361 case ${1} in
176 lt) operator="-lt"; shift;; 362 -lt|lt) operator="-lt"; shift;;
177 gt) operator="-gt"; shift;; 363 -gt|gt) operator="-gt"; shift;;
178 le) operator="-le"; shift;; 364 -le|le) operator="-le"; shift;;
179 ge) operator="-ge"; shift;; 365 -ge|ge) operator="-ge"; shift;;
180 eq) operator="-eq"; shift;; 366 -eq|eq) operator="-eq"; shift;;
181 *) operator="-eq";; 367 *) operator="-eq";;
182 esac 368 esac
183 369
184 for x in ${@}; do 370 for x in ${@}; do
185 for((y=0; y<$((3 - ${#x})); y++)); do value="${value}0"; done 371 for((y=0; y<$((3 - ${#x})); y++)); do value="${value}0"; done
186 value="${value}${x}" 372 value="${value}${x}"
194 3) for((y=0; y<$((3 - ${#KV_PATCH})); y++)); do test="${test}0"; done; 380 3) for((y=0; y<$((3 - ${#KV_PATCH})); y++)); do test="${test}0"; done;
195 test="${test}${KV_PATCH}";; 381 test="${test}${KV_PATCH}";;
196 *) die "Error in kernel-2_kernel_is(): Too many parameters.";; 382 *) die "Error in kernel-2_kernel_is(): Too many parameters.";;
197 esac 383 esac
198 done 384 done
199 385
200 [ ${test} ${operator} ${value} ] && return 0 || return 1 386 [ ${test} ${operator} ${value} ] && return 0 || return 1
201} 387}
202 388
203get_localversion() { 389get_localversion() {
204 local lv_list i x 390 local lv_list i x
213 done 399 done
214 x=${x/ /} 400 x=${x/ /}
215 echo ${x} 401 echo ${x}
216} 402}
217 403
404# internal variable, so we know to only print the warning once
405get_version_warning_done=
406
407# @FUNCTION: get_version
408# @DESCRIPTION:
409# It gets the version of the kernel inside KERNEL_DIR and populates the KV_FULL variable
410# (if KV_FULL is already set it does nothing).
411#
412# The kernel version variables (KV_MAJOR, KV_MINOR, KV_PATCH, KV_EXTRA and KV_LOCAL) are also set.
413#
414# The KV_DIR is set using the KERNEL_DIR env var, the KV_DIR_OUT is set using a valid
415# KBUILD_OUTPUT (in a decreasing priority list, we look for the env var, makefile var or the
416# symlink /lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build).
218get_version() { 417get_version() {
219 local kbuild_output 418 local kbuild_output
220 419
221 # no need to execute this twice assuming KV_FULL is populated. 420 # no need to execute this twice assuming KV_FULL is populated.
222 # we can force by unsetting KV_FULL 421 # we can force by unsetting KV_FULL
225 # if we dont know KV_FULL, then we need too. 424 # if we dont know KV_FULL, then we need too.
226 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR 425 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
227 unset KV_DIR 426 unset KV_DIR
228 427
229 # KV_DIR will contain the full path to the sources directory we should use 428 # KV_DIR will contain the full path to the sources directory we should use
429 [ -z "${get_version_warning_done}" ] && \
230 qeinfo "Determining the location of the kernel source code" 430 qeinfo "Determining the location of the kernel source code"
231 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})" 431 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
232 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}" 432 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
233 433
234 if [ -z "${KV_DIR}" ] 434 if [ -z "${KV_DIR}" ]
235 then 435 then
436 if [ -z "${get_version_warning_done}" ]; then
437 get_version_warning_done=1
236 qeerror "Unable to find kernel sources at ${KERNEL_DIR}" 438 qeerror "Unable to find kernel sources at ${KERNEL_DIR}"
237 qeinfo "This package requires Linux sources." 439 #qeinfo "This package requires Linux sources."
238 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then 440 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
239 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, " 441 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
240 qeinfo "(or the kernel you wish to build against)." 442 qeinfo "(or the kernel you wish to build against)."
241 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location" 443 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
242 else 444 else
243 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against." 445 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
446 fi
244 fi 447 fi
245 return 1 448 return 1
246 fi 449 fi
247 450
451 if [ -z "${get_version_warning_done}" ]; then
248 qeinfo "Found kernel source directory:" 452 qeinfo "Found kernel source directory:"
249 qeinfo " ${KV_DIR}" 453 qeinfo " ${KV_DIR}"
454 fi
250 455
251 if [ ! -s "${KV_DIR}/Makefile" ] 456 if [ ! -s "${KV_DIR}/Makefile" ]
252 then 457 then
458 if [ -z "${get_version_warning_done}" ]; then
459 get_version_warning_done=1
253 qeerror "Could not find a Makefile in the kernel source directory." 460 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" 461 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
462 fi
255 return 1 463 return 1
256 fi 464 fi
257 465
258 # OK so now we know our sources directory, but they might be using 466 # OK so now we know our sources directory, but they might be using
259 # KBUILD_OUTPUT, and we need this for .config and localversions-* 467 # KBUILD_OUTPUT, and we need this for .config and localversions-*
260 # so we better find it eh? 468 # so we better find it eh?
261 # do we pass KBUILD_OUTPUT on the CLI? 469 # do we pass KBUILD_OUTPUT on the CLI?
262 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}" 470 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}"
263 471
264 # And if we didn't pass it, we can take a nosey in the Makefile 472 # And if we didn't pass it, we can take a nosey in the Makefile
265 kbuild_output="$(getfilevar KBUILD_OUTPUT ${KV_DIR}/Makefile)" 473 kbuild_output="$(getfilevar_noexec KBUILD_OUTPUT ${KV_DIR}/Makefile)"
266 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}" 474 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
267 475
268 # And contrary to existing functions I feel we shouldn't trust the 476 # And contrary to existing functions I feel we shouldn't trust the
269 # directory name to find version information as this seems insane. 477 # directory name to find version information as this seems insane.
270 # so we parse ${KV_DIR}/Makefile 478 # so we parse ${KV_DIR}/Makefile
271 KV_MAJOR="$(getfilevar VERSION ${KV_DIR}/Makefile)" 479 KV_MAJOR="$(getfilevar_noexec VERSION ${KV_DIR}/Makefile)"
272 KV_MINOR="$(getfilevar PATCHLEVEL ${KV_DIR}/Makefile)" 480 KV_MINOR="$(getfilevar_noexec PATCHLEVEL ${KV_DIR}/Makefile)"
273 KV_PATCH="$(getfilevar SUBLEVEL ${KV_DIR}/Makefile)" 481 KV_PATCH="$(getfilevar_noexec SUBLEVEL ${KV_DIR}/Makefile)"
274 KV_EXTRA="$(getfilevar EXTRAVERSION ${KV_DIR}/Makefile)" 482 KV_EXTRA="$(getfilevar_noexec EXTRAVERSION ${KV_DIR}/Makefile)"
275 483
276 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ] 484 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
277 then 485 then
486 if [ -z "${get_version_warning_done}" ]; then
487 get_version_warning_done=1
278 qeerror "Could not detect kernel version." 488 qeerror "Could not detect kernel version."
279 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources." 489 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
490 fi
280 return 1 491 return 1
281 fi 492 fi
282 493
283 # and in newer versions we can also pull LOCALVERSION if it is set. 494 # and in newer versions we can also pull LOCALVERSION if it is set.
284 # but before we do this, we need to find if we use a different object directory. 495 # but before we do this, we need to find if we use a different object directory.
297 KV_LOCAL="$(get_localversion ${KV_OUT_DIR})" 508 KV_LOCAL="$(get_localversion ${KV_OUT_DIR})"
298 fi 509 fi
299 # and if we STILL have not got it, then we better just set it to KV_DIR 510 # and if we STILL have not got it, then we better just set it to KV_DIR
300 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}" 511 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
301 512
302 if [ ! -s "${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 ${KV_DIR})" 513 KV_LOCAL="${KV_LOCAL}$(get_localversion ${KV_DIR})"
514 if linux_config_src_exists; then
312 KV_LOCAL="${KV_LOCAL}$(linux_chkconfig_string LOCALVERSION)" 515 KV_LOCAL="${KV_LOCAL}$(linux_chkconfig_string LOCALVERSION)"
313 KV_LOCAL="${KV_LOCAL//\"/}" 516 KV_LOCAL="${KV_LOCAL//\"/}"
314 517
315 # For things like git that can append extra stuff: 518 # For things like git that can append extra stuff:
316 [ -e ${KV_DIR}/scripts/setlocalversion ] && 519 [ -e ${KV_DIR}/scripts/setlocalversion ] &&
317 linux_chkconfig_builtin LOCALVERSION_AUTO && 520 linux_chkconfig_builtin LOCALVERSION_AUTO &&
318 KV_LOCAL="${KV_LOCAL}$(sh ${KV_DIR}/scripts/setlocalversion ${KV_DIR})" 521 KV_LOCAL="${KV_LOCAL}$(sh ${KV_DIR}/scripts/setlocalversion ${KV_DIR})"
522 fi
319 523
320 # And we should set KV_FULL to the full expanded version 524 # And we should set KV_FULL to the full expanded version
321 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}" 525 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
322 526
323 qeinfo "Found sources for kernel version:" 527 qeinfo "Found sources for kernel version:"
324 qeinfo " ${KV_FULL}" 528 qeinfo " ${KV_FULL}"
325 529
326 return 0 530 return 0
327} 531}
328 532
533# @FUNCTION: get_running_version
534# @DESCRIPTION:
535# It gets the version of the current running kernel and the result is the same as get_version() if the
536# function can find the sources.
329get_running_version() { 537get_running_version() {
330 KV_FULL=$(uname -r) 538 KV_FULL=$(uname -r)
331 539
332 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then 540 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
333 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source) 541 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
348 && KV_EXTRA="-${KV_FULL#*-}" 556 && KV_EXTRA="-${KV_FULL#*-}"
349 fi 557 fi
350 return 0 558 return 0
351} 559}
352 560
561# This next function is named with the eclass prefix to avoid conflicts with
562# some old versionator-like eclass functions.
563
564# @FUNCTION: linux-info_get_any_version
565# @DESCRIPTION:
566# This attempts to find the version of the sources, and otherwise falls back to
567# the version of the running kernel.
568linux-info_get_any_version() {
569 get_version
570 if [[ $? -ne 0 ]]; then
571 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
572 get_running_version
573 fi
574}
575
353 576
354# ebuild check functions 577# ebuild check functions
355# --------------------------------------- 578# ---------------------------------------
356 579
580# @FUNCTION: check_kernel_built
581# @DESCRIPTION:
582# This function verifies that the current kernel sources have been already prepared otherwise it dies.
357check_kernel_built() { 583check_kernel_built() {
358 # if we haven't determined the version yet, we need too. 584 # if we haven't determined the version yet, we need to
585 require_configured_kernel
359 get_version; 586 get_version
360 587
361 if [ ! -f "${KV_OUT_DIR}/include/linux/version.h" ] 588 if [ ! -f "${KV_OUT_DIR}/include/linux/version.h" ]
362 then 589 then
363 eerror "These sources have not yet been prepared." 590 eerror "These sources have not yet been prepared."
364 eerror "We cannot build against an unprepared tree." 591 eerror "We cannot build against an unprepared tree."
371 eerror "Then please try merging this module again." 598 eerror "Then please try merging this module again."
372 die "Kernel sources need compiling first" 599 die "Kernel sources need compiling first"
373 fi 600 fi
374} 601}
375 602
603# @FUNCTION: check_modules_supported
604# @DESCRIPTION:
605# This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
376check_modules_supported() { 606check_modules_supported() {
377 # if we haven't determined the version yet, we need too. 607 # if we haven't determined the version yet, we need too.
608 require_configured_kernel
378 get_version; 609 get_version
379 610
380 if ! linux_chkconfig_builtin "MODULES" 611 if ! linux_chkconfig_builtin "MODULES"
381 then 612 then
382 eerror "These sources do not support loading external modules." 613 eerror "These sources do not support loading external modules."
383 eerror "to be able to use this module please enable \"Loadable modules support\"" 614 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." 615 eerror "in your kernel, recompile and then try merging this module again."
385 die "No support for external modules in ${KV_FULL} config" 616 die "No support for external modules in ${KV_FULL} config"
386 fi 617 fi
387} 618}
388 619
620# @FUNCTION: check_extra_config
621# @DESCRIPTION:
622# It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
623# the prefix ~ is not used) doesn't satisfy the directive.
389check_extra_config() { 624check_extra_config() {
390 local config negate die error reworkmodulenames 625 local config negate die error reworkmodulenames
391 local soft_errors_count=0 hard_errors_count=0 626 local soft_errors_count=0 hard_errors_count=0 config_required=0
392 627
393 # if we haven't determined the version yet, we need too. 628 # if we haven't determined the version yet, we need to
394 get_version; 629 linux-info_get_any_version
630
631 # Determine if we really need a .config. The only time when we don't need
632 # one is when all of the CONFIG_CHECK options are prefixed with "~".
633 for config in ${CONFIG_CHECK}
634 do
635 if [[ "${config:0:1}" != "~" ]]; then
636 config_required=1
637 break
638 fi
639 done
640
641 if [[ ${config_required} == 0 ]]; then
642 # In the case where we don't require a .config, we can now bail out
643 # if the user has no .config as there is nothing to do. Otherwise
644 # code later will cause a failure due to missing .config.
645 if ! linux_config_exists; then
646 ewarn "Unable to check for the following kernel config options due"
647 ewarn "to absence of any configured kernel sources or compiled"
648 ewarn "config:"
649 for config in ${CONFIG_CHECK}; do
650 ewarn " - ${config#\~}"
651 done
652 ewarn "You're on your own to make sure they are set if needed."
653 return 0
654 fi
655 else
656 [ -n "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
657 fi
395 658
396 einfo "Checking for suitable kernel configuration options..." 659 einfo "Checking for suitable kernel configuration options..."
660
397 for config in ${CONFIG_CHECK} 661 for config in ${CONFIG_CHECK}
398 do 662 do
399 # if we specify any fatal, ensure we honor them 663 # if we specify any fatal, ensure we honor them
400 die=1 664 die=1
401 error=0 665 error=0
402 negate=0 666 negate=0
403 reworkmodulenames=0 667 reworkmodulenames=0
404 668
405 if [[ -z ${config/\~*} ]]; then 669 if [[ ${config:0:1} == "~" ]]; then
406 die=0 670 die=0
407 config=${config:1} 671 config=${config:1}
408 elif [[ -z ${config/\@*} ]]; then 672 elif [[ ${config:0:1} == "@" ]]; then
409 die=0 673 die=0
410 reworkmodulenames=1 674 reworkmodulenames=1
411 config=${config:1} 675 config=${config:1}
412 fi 676 fi
413 if [[ -z ${config//\!*} ]]; then 677 if [[ ${config:0:1} == "!" ]]; then
414 negate=1 678 negate=1
415 config=${config:1} 679 config=${config:1}
416 fi 680 fi
417 681
418 if [[ ${negate} == 1 ]]; then 682 if [[ ${negate} == 1 ]]; then
480 eend 0 744 eend 0
481 fi 745 fi
482} 746}
483 747
484check_zlibinflate() { 748check_zlibinflate() {
485 # if we haven't determined the version yet, we need too. 749 # if we haven't determined the version yet, we need to
750 require_configured_kernel
486 get_version; 751 get_version
487 752
488 # although I restructured this code - I really really really dont support it! 753 # although I restructured this code - I really really really dont support it!
489 754
490 # bug #27882 - zlib routines are only linked into the kernel 755 # bug #27882 - zlib routines are only linked into the kernel
491 # if something compiled into the kernel calls them 756 # if something compiled into the kernel calls them
498 local DEFLATE 763 local DEFLATE
499 764
500 einfo "Determining the usability of ZLIB_INFLATE support in your kernel" 765 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
501 766
502 ebegin "checking ZLIB_INFLATE" 767 ebegin "checking ZLIB_INFLATE"
503 getfilevar_isbuiltin CONFIG_ZLIB_INFLATE ${KV_DIR}/.config 768 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
504 eend $? 769 eend $?
505 [ "$?" != 0 ] && die 770 [ "$?" != 0 ] && die
506 771
507 ebegin "checking ZLIB_DEFLATE" 772 ebegin "checking ZLIB_DEFLATE"
508 getfilevar_isbuiltin CONFIG_ZLIB_DEFLATE ${KV_DIR}/.config 773 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
509 eend $? 774 eend $?
510 [ "$?" != 0 ] && die 775 [ "$?" != 0 ] && die
511 776
512 local LINENO_START 777 local LINENO_START
513 local LINENO_END 778 local LINENO_END
551} 816}
552 817
553################################ 818################################
554# Default pkg_setup 819# Default pkg_setup
555# Also used when inheriting linux-mod to force a get_version call 820# Also used when inheriting linux-mod to force a get_version call
556 821# @FUNCTION: linux-info_pkg_setup
822# @DESCRIPTION:
823# Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
824# to support the options specified in CONFIG_CHECK (if not null)
557linux-info_pkg_setup() { 825linux-info_pkg_setup() {
558 get_version || die "Unable to calculate Linux Kernel version" 826 linux-info_get_any_version
559 827
560 if kernel_is 2 4; then 828 if kernel_is 2 4; then
561 if [ "$( gcc-major-version )" -eq "4" ] ; then 829 if [ "$( gcc-major-version )" -eq "4" ] ; then
562 echo 830 echo
563 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with" 831 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"

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