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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 1.50 2006/12/07 18:52:55 dsd 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
67case ${ARCH} in 123case ${ARCH} in
68 ppc) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";; 124 ppc) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
69 ppc64) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";; 125 ppc64) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
70esac 126esac
71 127
72# These are legacy wrappers for toolchain-funcs. 128# @FUNCTION: set_arch_to_kernel
73# I dont like them here, but oh well. 129# @DESCRIPTION:
130# Set the env ARCH to match what the kernel expects.
74set_arch_to_kernel() { export ARCH="$(tc-arch-kernel)"; } 131set_arch_to_kernel() { export ARCH=$(tc-arch-kernel); }
132# @FUNCTION: set_arch_to_portage
133# @DESCRIPTION:
134# Set the env ARCH to match what portage expects.
75set_arch_to_portage() { export ARCH="$(tc-arch)"; } 135set_arch_to_portage() { export ARCH=$(tc-arch); }
76 136
77# qeinfo "Message" 137# qeinfo "Message"
78# ------------------- 138# -------------------
79# qeinfo is a quiet einfo call when EBUILD_PHASE 139# qeinfo is a quiet einfo call when EBUILD_PHASE
80# should not have visible output. 140# should not have visible output.
95qeerror() { qout eerror "${@}" ; } 155qeerror() { qout eerror "${@}" ; }
96 156
97# File Functions 157# File Functions
98# --------------------------------------- 158# ---------------------------------------
99 159
100# getfilevar accepts 2 vars as follows: 160# @FUNCTION: getfilevar
101# getfilevar <VARIABLE> <CONFIGFILE> 161# @USAGE: variable configfile
102 162# @RETURN: the value of the variable
163# @DESCRIPTION:
164# It detects the value of the variable defined in the file configfile. This is
165# done by including the configfile, and printing the variable with Make.
166# It WILL break if your makefile has missing dependencies!
103getfilevar() { 167getfilevar() {
104local ERROR workingdir basefname basedname myARCH="${ARCH}" 168local ERROR basefname basedname myARCH="${ARCH}"
105 ERROR=0 169 ERROR=0
106 170
107 [ -z "${1}" ] && ERROR=1 171 [ -z "${1}" ] && ERROR=1
108 [ ! -f "${2}" ] && ERROR=1 172 [ ! -f "${2}" ] && ERROR=1
109 173
111 then 175 then
112 echo -e "\n" 176 echo -e "\n"
113 eerror "getfilevar requires 2 variables, with the second a valid file." 177 eerror "getfilevar requires 2 variables, with the second a valid file."
114 eerror " getfilevar <VARIABLE> <CONFIGFILE>" 178 eerror " getfilevar <VARIABLE> <CONFIGFILE>"
115 else 179 else
116 workingdir="${PWD}"
117 basefname="$(basename ${2})" 180 basefname="$(basename ${2})"
118 basedname="$(dirname ${2})" 181 basedname="$(dirname ${2})"
119 unset ARCH 182 unset ARCH
120 183
121 cd "${basedname}"
122 echo -e "e:\\n\\t@echo \$(${1})\\ninclude ${basefname}" | \ 184 echo -e "e:\\n\\t@echo \$(${1})\\ninclude ${basefname}" | \
123 make M="${S}" ${BUILD_FIXES} -s -f - 2>/dev/null 185 make -C "${basedname}" M="${S}" ${BUILD_FIXES} -s -f - 2>/dev/null
124 cd "${workingdir}"
125 186
126 ARCH=${myARCH} 187 ARCH=${myARCH}
127 fi 188 fi
128} 189}
129 190
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 ${KV_OUT_DIR}"
262 fi
263}
264
265# @FUNCTION: linux_chkconfig_present
266# @USAGE: option
267# @RETURN: true or false
268# @DESCRIPTION:
269# It checks that CONFIG_<option>=y or CONFIG_<option>=m is present in the current kernel .config
270# If linux_config_exists returns false, the results of this are UNDEFINED. You
271# MUST call linux_config_exists first.
130linux_chkconfig_present() { 272linux_chkconfig_present() {
131local RESULT 273local RESULT
274 [ -z "${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"
132 RESULT="$(getfilevar CONFIG_${1} ${KV_OUT_DIR}/.config)" 278 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
133 [ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1 279 [ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1
134} 280}
135 281
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.
136linux_chkconfig_module() { 289linux_chkconfig_module() {
137local 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 "${config}" ] && config="/proc/config.gz"
138 RESULT="$(getfilevar CONFIG_${1} ${KV_OUT_DIR}/.config)" 295 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
139 [ "${RESULT}" = "m" ] && return 0 || return 1 296 [ "${RESULT}" = "m" ] && return 0 || return 1
140} 297}
141 298
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.
142linux_chkconfig_builtin() { 306linux_chkconfig_builtin() {
143local 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 "${config}" ] && config="/proc/config.gz"
144 RESULT="$(getfilevar CONFIG_${1} ${KV_OUT_DIR}/.config)" 312 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
145 [ "${RESULT}" = "y" ] && return 0 || return 1 313 [ "${RESULT}" = "y" ] && return 0 || return 1
146} 314}
147 315
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.
148linux_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 "${config}" ] && config="/proc/config.gz"
149 getfilevar "CONFIG_${1}" "${KV_OUT_DIR}/.config" 328 getfilevar_noexec "CONFIG_${1}" "${config}"
150} 329}
151 330
152# Versioning Functions 331# Versioning Functions
153# --------------------------------------- 332# ---------------------------------------
154 333
155# 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.
156# 340#
341# @CODE
157# For Example where KV = 2.6.9 342# For Example where KV = 2.6.9
158# kernel_is 2 4 returns false 343# kernel_is 2 4 returns false
159# kernel_is 2 returns true 344# kernel_is 2 returns true
160# kernel_is 2 6 returns true 345# kernel_is 2 6 returns true
161# kernel_is 2 6 8 returns false 346# kernel_is 2 6 8 returns false
162# kernel_is 2 6 9 returns true 347# kernel_is 2 6 9 returns true
163# 348# @CODE
349
164# got the jist yet? 350# got the jist yet?
165 351
166kernel_is() { 352kernel_is() {
167 # if we haven't determined the version yet, we need too. 353 # if we haven't determined the version yet, we need to.
168 get_version; 354 get_version
169 local operator test value x=0 y=0 z=0 355 local operator test value x=0 y=0 z=0
170 356
171 case ${1} in 357 case ${1} in
172 lt) operator="-lt"; shift;; 358 lt) operator="-lt"; shift;;
173 gt) operator="-gt"; shift;; 359 gt) operator="-gt"; shift;;
190 3) for((y=0; y<$((3 - ${#KV_PATCH})); y++)); do test="${test}0"; done; 376 3) for((y=0; y<$((3 - ${#KV_PATCH})); y++)); do test="${test}0"; done;
191 test="${test}${KV_PATCH}";; 377 test="${test}${KV_PATCH}";;
192 *) die "Error in kernel-2_kernel_is(): Too many parameters.";; 378 *) die "Error in kernel-2_kernel_is(): Too many parameters.";;
193 esac 379 esac
194 done 380 done
195 381
196 [ ${test} ${operator} ${value} ] && return 0 || return 1 382 [ ${test} ${operator} ${value} ] && return 0 || return 1
197} 383}
198 384
199get_localversion() { 385get_localversion() {
200 local lv_list i x 386 local lv_list i x
209 done 395 done
210 x=${x/ /} 396 x=${x/ /}
211 echo ${x} 397 echo ${x}
212} 398}
213 399
400# internal variable, so we know to only print the warning once
401get_version_warning_done=
402
403# @FUNCTION: get_version
404# @DESCRIPTION:
405# It gets the version of the kernel inside KERNEL_DIR and populates the KV_FULL variable
406# (if KV_FULL is already set it does nothing).
407#
408# The kernel version variables (KV_MAJOR, KV_MINOR, KV_PATCH, KV_EXTRA and KV_LOCAL) are also set.
409#
410# The KV_DIR is set using the KERNEL_DIR env var, the KV_DIR_OUT is set using a valid
411# KBUILD_OUTPUT (in a decreasing priority list, we look for the env var, makefile var or the
412# symlink /lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build).
214get_version() { 413get_version() {
215 local kbuild_output 414 local kbuild_output
216 415
217 # no need to execute this twice assuming KV_FULL is populated. 416 # no need to execute this twice assuming KV_FULL is populated.
218 # we can force by unsetting KV_FULL 417 # we can force by unsetting KV_FULL
221 # if we dont know KV_FULL, then we need too. 420 # if we dont know KV_FULL, then we need too.
222 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR 421 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
223 unset KV_DIR 422 unset KV_DIR
224 423
225 # KV_DIR will contain the full path to the sources directory we should use 424 # KV_DIR will contain the full path to the sources directory we should use
425 [ -z "${get_version_warning_done}" ] && \
226 qeinfo "Determining the location of the kernel source code" 426 qeinfo "Determining the location of the kernel source code"
227 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})" 427 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
228 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}" 428 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
229 429
230 if [ -z "${KV_DIR}" ] 430 if [ -z "${KV_DIR}" ]
231 then 431 then
432 if [ -z "${get_version_warning_done}" ]; then
433 get_version_warning_done=1
232 qeerror "Unable to find kernel sources at ${KERNEL_DIR}" 434 qeerror "Unable to find kernel sources at ${KERNEL_DIR}"
233 qeinfo "This package requires Linux sources." 435 #qeinfo "This package requires Linux sources."
234 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then 436 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
235 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, " 437 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
236 qeinfo "(or the kernel you wish to build against)." 438 qeinfo "(or the kernel you wish to build against)."
237 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location" 439 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
238 else 440 else
239 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against." 441 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
442 fi
240 fi 443 fi
241 return 1 444 return 1
242 fi 445 fi
243 446
447 if [ -z "${get_version_warning_done}" ]; then
244 qeinfo "Found kernel source directory:" 448 qeinfo "Found kernel source directory:"
245 qeinfo " ${KV_DIR}" 449 qeinfo " ${KV_DIR}"
450 fi
246 451
247 if [ ! -s "${KV_DIR}/Makefile" ] 452 if [ ! -s "${KV_DIR}/Makefile" ]
248 then 453 then
454 if [ -z "${get_version_warning_done}" ]; then
455 get_version_warning_done=1
249 qeerror "Could not find a Makefile in the kernel source directory." 456 qeerror "Could not find a Makefile in the kernel source directory."
250 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources" 457 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
458 fi
251 return 1 459 return 1
252 fi 460 fi
253 461
254 # OK so now we know our sources directory, but they might be using 462 # OK so now we know our sources directory, but they might be using
255 # KBUILD_OUTPUT, and we need this for .config and localversions-* 463 # KBUILD_OUTPUT, and we need this for .config and localversions-*
256 # so we better find it eh? 464 # so we better find it eh?
257 # do we pass KBUILD_OUTPUT on the CLI? 465 # do we pass KBUILD_OUTPUT on the CLI?
258 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}" 466 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}"
259 467
260 # And if we didn't pass it, we can take a nosey in the Makefile 468 # And if we didn't pass it, we can take a nosey in the Makefile
261 kbuild_output="$(getfilevar KBUILD_OUTPUT ${KV_DIR}/Makefile)" 469 kbuild_output="$(getfilevar_noexec KBUILD_OUTPUT ${KV_DIR}/Makefile)"
262 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}" 470 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
263 471
264 # 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
265 # directory name to find version information as this seems insane. 473 # directory name to find version information as this seems insane.
266 # so we parse ${KV_DIR}/Makefile 474 # so we parse ${KV_DIR}/Makefile
267 KV_MAJOR="$(getfilevar VERSION ${KV_DIR}/Makefile)" 475 KV_MAJOR="$(getfilevar_noexec VERSION ${KV_DIR}/Makefile)"
268 KV_MINOR="$(getfilevar PATCHLEVEL ${KV_DIR}/Makefile)" 476 KV_MINOR="$(getfilevar_noexec PATCHLEVEL ${KV_DIR}/Makefile)"
269 KV_PATCH="$(getfilevar SUBLEVEL ${KV_DIR}/Makefile)" 477 KV_PATCH="$(getfilevar_noexec SUBLEVEL ${KV_DIR}/Makefile)"
270 KV_EXTRA="$(getfilevar EXTRAVERSION ${KV_DIR}/Makefile)" 478 KV_EXTRA="$(getfilevar_noexec EXTRAVERSION ${KV_DIR}/Makefile)"
271 479
272 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ] 480 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
273 then 481 then
482 if [ -z "${get_version_warning_done}" ]; then
483 get_version_warning_done=1
274 qeerror "Could not detect kernel version." 484 qeerror "Could not detect kernel version."
275 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources." 485 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
486 fi
276 return 1 487 return 1
277 fi 488 fi
278 489
279 # and in newer versions we can also pull LOCALVERSION if it is set. 490 # and in newer versions we can also pull LOCALVERSION if it is set.
280 # but before we do this, we need to find if we use a different object directory. 491 # but before we do this, we need to find if we use a different object directory.
293 KV_LOCAL="$(get_localversion ${KV_OUT_DIR})" 504 KV_LOCAL="$(get_localversion ${KV_OUT_DIR})"
294 fi 505 fi
295 # and if we STILL have not got it, then we better just set it to KV_DIR 506 # and if we STILL have not got it, then we better just set it to KV_DIR
296 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}" 507 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
297 508
298 if [ ! -s "${KV_OUT_DIR}/.config" ]
299 then
300 qeerror "Could not find a usable .config in the kernel source directory."
301 qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources."
302 qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that"
303 qeerror "it points to the necessary object directory so that it might find .config."
304 return 1
305 fi
306
307 KV_LOCAL="${KV_LOCAL}$(get_localversion ${KV_DIR})" 509 KV_LOCAL="${KV_LOCAL}$(get_localversion ${KV_DIR})"
510 if linux_config_exists; then
308 KV_LOCAL="${KV_LOCAL}$(linux_chkconfig_string LOCALVERSION)" 511 KV_LOCAL="${KV_LOCAL}$(linux_chkconfig_string LOCALVERSION)"
309 KV_LOCAL="${KV_LOCAL//\"/}" 512 KV_LOCAL="${KV_LOCAL//\"/}"
310 513
311 # For things like git that can append extra stuff: 514 # For things like git that can append extra stuff:
312 [ -e ${KV_DIR}/scripts/setlocalversion ] && 515 [ -e ${KV_DIR}/scripts/setlocalversion ] &&
313 linux_chkconfig_builtin LOCALVERSION_AUTO && 516 linux_chkconfig_builtin LOCALVERSION_AUTO &&
314 KV_LOCAL="${KV_LOCAL}$(sh ${KV_DIR}/scripts/setlocalversion ${KV_DIR})" 517 KV_LOCAL="${KV_LOCAL}$(sh ${KV_DIR}/scripts/setlocalversion ${KV_DIR})"
518 fi
315 519
316 # And we should set KV_FULL to the full expanded version 520 # And we should set KV_FULL to the full expanded version
317 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}" 521 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
318 522
319 qeinfo "Found sources for kernel version:" 523 qeinfo "Found sources for kernel version:"
320 qeinfo " ${KV_FULL}" 524 qeinfo " ${KV_FULL}"
321 525
322 return 0 526 return 0
323} 527}
324 528
529# @FUNCTION: get_running_version
530# @DESCRIPTION:
531# It gets the version of the current running kernel and the result is the same as get_version() if the
532# function can find the sources.
325get_running_version() { 533get_running_version() {
326 KV_FULL=$(uname -r) 534 KV_FULL=$(uname -r)
327 535
328 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then 536 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
329 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source) 537 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
348 556
349 557
350# ebuild check functions 558# ebuild check functions
351# --------------------------------------- 559# ---------------------------------------
352 560
561# @FUNCTION: check_kernel_built
562# @DESCRIPTION:
563# This function verifies that the current kernel sources have been already prepared otherwise it dies.
353check_kernel_built() { 564check_kernel_built() {
354 # 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
355 get_version; 567 get_version
356 568
357 if [ ! -f "${KV_OUT_DIR}/include/linux/version.h" ] 569 if [ ! -f "${KV_OUT_DIR}/include/linux/version.h" ]
358 then 570 then
359 eerror "These sources have not yet been prepared." 571 eerror "These sources have not yet been prepared."
360 eerror "We cannot build against an unprepared tree." 572 eerror "We cannot build against an unprepared tree."
367 eerror "Then please try merging this module again." 579 eerror "Then please try merging this module again."
368 die "Kernel sources need compiling first" 580 die "Kernel sources need compiling first"
369 fi 581 fi
370} 582}
371 583
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.
372check_modules_supported() { 587check_modules_supported() {
373 # 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
374 get_version; 590 get_version
375 591
376 if ! linux_chkconfig_builtin "MODULES" 592 if ! linux_chkconfig_builtin "MODULES"
377 then 593 then
378 eerror "These sources do not support loading external modules." 594 eerror "These sources do not support loading external modules."
379 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\""
380 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."
381 die "No support for external modules in ${KV_FULL} config" 597 die "No support for external modules in ${KV_FULL} config"
382 fi 598 fi
383} 599}
384 600
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.
385check_extra_config() { 605check_extra_config() {
386 local config negate die error reworkmodulenames 606 local config negate die error reworkmodulenames
387 local soft_errors_count=0 hard_errors_count=0 607 local soft_errors_count=0 hard_errors_count=0 config_required=0
388 608
389 # if we haven't determined the version yet, we need too. 609 # if we haven't determined the version yet, we need to
390 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
391 638
392 einfo "Checking for suitable kernel configuration options..." 639 einfo "Checking for suitable kernel configuration options..."
640
393 for config in ${CONFIG_CHECK} 641 for config in ${CONFIG_CHECK}
394 do 642 do
395 # if we specify any fatal, ensure we honor them 643 # if we specify any fatal, ensure we honor them
396 die=1 644 die=1
397 error=0 645 error=0
398 negate=0 646 negate=0
399 reworkmodulenames=0 647 reworkmodulenames=0
400 648
401 if [[ -z ${config/\~*} ]]; then 649 if [[ ${config:0:1} == "~" ]]; then
402 die=0 650 die=0
403 config=${config:1} 651 config=${config:1}
404 elif [[ -z ${config/\@*} ]]; then 652 elif [[ ${config:0:1} == "@" ]]; then
405 die=0 653 die=0
406 reworkmodulenames=1 654 reworkmodulenames=1
407 config=${config:1} 655 config=${config:1}
408 fi 656 fi
409 if [[ -z ${config//\!*} ]]; then 657 if [[ ${config:0:1} == "!" ]]; then
410 negate=1 658 negate=1
411 config=${config:1} 659 config=${config:1}
412 fi 660 fi
413 661
414 if [[ ${negate} == 1 ]]; then 662 if [[ ${negate} == 1 ]]; then
476 eend 0 724 eend 0
477 fi 725 fi
478} 726}
479 727
480check_zlibinflate() { 728check_zlibinflate() {
481 # 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
482 get_version; 731 get_version
483 732
484 # 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!
485 734
486 # bug #27882 - zlib routines are only linked into the kernel 735 # bug #27882 - zlib routines are only linked into the kernel
487 # if something compiled into the kernel calls them 736 # if something compiled into the kernel calls them
494 local DEFLATE 743 local DEFLATE
495 744
496 einfo "Determining the usability of ZLIB_INFLATE support in your kernel" 745 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
497 746
498 ebegin "checking ZLIB_INFLATE" 747 ebegin "checking ZLIB_INFLATE"
499 getfilevar_isbuiltin CONFIG_ZLIB_INFLATE ${KV_DIR}/.config 748 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
500 eend $? 749 eend $?
501 [ "$?" != 0 ] && die 750 [ "$?" != 0 ] && die
502 751
503 ebegin "checking ZLIB_DEFLATE" 752 ebegin "checking ZLIB_DEFLATE"
504 getfilevar_isbuiltin CONFIG_ZLIB_DEFLATE ${KV_DIR}/.config 753 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
505 eend $? 754 eend $?
506 [ "$?" != 0 ] && die 755 [ "$?" != 0 ] && die
507 756
508 local LINENO_START 757 local LINENO_START
509 local LINENO_END 758 local LINENO_END
547} 796}
548 797
549################################ 798################################
550# Default pkg_setup 799# Default pkg_setup
551# 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
552 801# @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)
553linux-info_pkg_setup() { 805linux-info_pkg_setup() {
554 get_version || die "Unable to calculate Linux Kernel version" 806 get_version
807 if [[ $rc -ne 0 ]]; then
808 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
809 get_running_version
810 fi
555 811
556 if kernel_is 2 4; then 812 if kernel_is 2 4; then
557 if [ "$( gcc-major-version )" -eq "4" ] ; then 813 if [ "$( gcc-major-version )" -eq "4" ] ; then
558 echo 814 echo
559 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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