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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 1.61 2009/08/30 22:37:06 robbat2 Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/linux-info.eclass,v 1.62 2009/09/06 22:54:58 robbat2 Exp $
4# 4#
5# Original author: John Mylchreest <johnm@gentoo.org> 5# Original author: John Mylchreest <johnm@gentoo.org>
6# Maintainer: kernel-misc@gentoo.org 6# Maintainer: kernel-misc@gentoo.org
7# 7#
8# Please direct your bugs to the current eclass maintainer :) 8# Please direct your bugs to the current eclass maintainer :)
11# @MAINTAINER: 11# @MAINTAINER:
12# kernel-misc@gentoo.org 12# kernel-misc@gentoo.org
13# @BLURB: eclass used for accessing kernel related information 13# @BLURB: eclass used for accessing kernel related information
14# @DESCRIPTION: 14# @DESCRIPTION:
15# This eclass is used as a central eclass for accessing kernel 15# This eclass is used as a central eclass for accessing kernel
16# related information for sources already installed. 16# related information for source or binary already installed.
17# It is vital for linux-mod.eclass to function correctly, and is split 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 18# out so that any ebuild behaviour "templates" are abstracted out
19# using additional eclasses. 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.
20 24
21# 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
22# These are as follows: 26# These are as follows:
23 27
24# @ECLASS-VARIABLE: KERNEL_DIR 28# @ECLASS-VARIABLE: KERNEL_DIR
36# You can also check that an option doesn't exist by 40# You can also check that an option doesn't exist by
37# prepending it with an exclamation mark (!). 41# prepending it with an exclamation mark (!).
38# 42#
39# e.g.: CONFIG_CHECK="!MTRR" 43# e.g.: CONFIG_CHECK="!MTRR"
40# 44#
41# To simply warn about a missing option, prepend a '~'. 45# To simply warn about a missing option, prepend a '~'.
46# It may be combined with '!'.
47#
48# In general, most checks should be non-fatal. The only time fatal checks should
49# be used is for building kernel modules or cases that a compile will fail
50# without the option.
51#
52# This is to allow usage of binary kernels, and minimal systems without kernel
53# sources.
42 54
43# @ECLASS-VARIABLE: ERROR_<CFG> 55# @ECLASS-VARIABLE: ERROR_<CFG>
44# @DESCRIPTION: 56# @DESCRIPTION:
45# A string containing the error message to display when the check against CONFIG_CHECK 57# A string containing the error message to display when the check against CONFIG_CHECK
46# fails. <CFG> should reference the appropriate option used in CONFIG_CHECK. 58# fails. <CFG> should reference the appropriate option used in CONFIG_CHECK.
86 98
87# @ECLASS-VARIABLE: KV_OUT_DIR 99# @ECLASS-VARIABLE: KV_OUT_DIR
88# @DESCRIPTION: 100# @DESCRIPTION:
89# A read-only variable. It's a string containing the kernel object directory, will be KV_DIR unless 101# A read-only variable. It's a string containing the kernel object directory, will be KV_DIR unless
90# KBUILD_OUTPUT is used. This should be used for referencing .config. 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.
91 107
92# And to ensure all the weirdness with crosscompile 108# And to ensure all the weirdness with crosscompile
93inherit toolchain-funcs versionator 109inherit toolchain-funcs versionator
94 110
95EXPORT_FUNCTIONS pkg_setup 111EXPORT_FUNCTIONS pkg_setup
178# @DESCRIPTION: 194# @DESCRIPTION:
179# It detects the value of the variable defined in the file configfile. 195# It detects the value of the variable defined in the file configfile.
180# This is done with sed matching an expression only. If the variable is defined, 196# This is done with sed matching an expression only. If the variable is defined,
181# you will run into problems. See getfilevar for those cases. 197# you will run into problems. See getfilevar for those cases.
182getfilevar_noexec() { 198getfilevar_noexec() {
183local ERROR basefname basedname myARCH="${ARCH}" 199 local ERROR basefname basedname mycat myARCH="${ARCH}"
184 ERROR=0 200 ERROR=0
201 mycat='cat'
185 202
186 [ -z "${1}" ] && ERROR=1 203 [ -z "${1}" ] && ERROR=1
187 [ ! -f "${2}" ] && ERROR=1 204 [ ! -f "${2}" ] && ERROR=1
205 [ "${2#.gz}" != "${2}" ] && mycat='zcat'
188 206
189 if [ "${ERROR}" = 1 ] 207 if [ "${ERROR}" = 1 ]
190 then 208 then
191 echo -e "\n" 209 echo -e "\n"
192 eerror "getfilevar_noexec requires 2 variables, with the second a valid file." 210 eerror "getfilevar_noexec requires 2 variables, with the second a valid file."
193 eerror " getfilevar_noexec <VARIABLE> <CONFIGFILE>" 211 eerror " getfilevar_noexec <VARIABLE> <CONFIGFILE>"
194 else 212 else
213 ${mycat} "${2}" | \
195 sed -n \ 214 sed -n \
196 -e "/^[[:space:]]*${1}[[:space:]]*=[[:space:]]*\(.*\)\$/{ 215 -e "/^[[:space:]]*${1}[[:space:]]*=[[:space:]]*\(.*\)\$/{
197 s,^[^=]*[[:space:]]*=[[:space:]]*,,g ; 216 s,^[^=]*[[:space:]]*=[[:space:]]*,,g ;
198 s,[[:space:]]*\$,,g ; 217 s,[[:space:]]*\$,,g ;
199 p 218 p
200 }" \ 219 }"
201 "${2}"
202 fi 220 fi
203} 221}
204 222
223
224# @FUNCTION: linux_config_src_exists
225# @RETURN: true or false
226# @DESCRIPTION:
227# It returns true if .config exists in a build directory otherwise false
228linux_config_src_exists() {
229 [ -s "${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}
205 239
206# @FUNCTION: linux_config_exists 240# @FUNCTION: linux_config_exists
207# @RETURN: true or false 241# @RETURN: true or false
208# @DESCRIPTION: 242# @DESCRIPTION:
209# It returns true if .config exists otherwise false 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.
210linux_config_exists() { 247linux_config_exists() {
211 [ -s "${KV_OUT_DIR}/.config" ] 248 linux_config_src_exists || linux_config_bin_exists
212} 249}
213 250
214# @FUNCTION: require_configured_kernel 251# @FUNCTION: require_configured_kernel
215# @DESCRIPTION: 252# @DESCRIPTION:
216# This function verifies that the current kernel is configured (it checks against the existence of .config) 253# This function verifies that the current kernel is configured (it checks against the existence of .config)
217# otherwise it dies. 254# otherwise it dies.
218require_configured_kernel() { 255require_configured_kernel() {
219 if ! linux_config_exists; then 256 if ! linux_config_src_exists; then
220 qeerror "Could not find a usable .config in the kernel source directory." 257 qeerror "Could not find a usable .config in the kernel source directory."
221 qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources." 258 qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources."
222 qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that" 259 qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that"
223 qeerror "it points to the necessary object directory so that it might find .config." 260 qeerror "it points to the necessary object directory so that it might find .config."
224 die "Kernel not configured; no .config found in ${KV_OUT_DIR}" 261 die "Kernel not configured; no .config found in ${KV_OUT_DIR}"
228# @FUNCTION: linux_chkconfig_present 265# @FUNCTION: linux_chkconfig_present
229# @USAGE: option 266# @USAGE: option
230# @RETURN: true or false 267# @RETURN: true or false
231# @DESCRIPTION: 268# @DESCRIPTION:
232# It checks that CONFIG_<option>=y or CONFIG_<option>=m is present in the current kernel .config 269# It checks that CONFIG_<option>=y or CONFIG_<option>=m is present in the current kernel .config
270# If linux_config_exists returns false, the results of this are UNDEFINED. You
271# MUST call linux_config_exists first.
233linux_chkconfig_present() { 272linux_chkconfig_present() {
234local RESULT 273local RESULT
235 require_configured_kernel 274 [ -z "${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"
236 RESULT="$(getfilevar_noexec CONFIG_${1} ${KV_OUT_DIR}/.config)" 278 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
237 [ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1 279 [ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1
238} 280}
239 281
240# @FUNCTION: linux_chkconfig_module 282# @FUNCTION: linux_chkconfig_module
241# @USAGE: option 283# @USAGE: option
242# @RETURN: true or false 284# @RETURN: true or false
243# @DESCRIPTION: 285# @DESCRIPTION:
244# It checks that CONFIG_<option>=m is present in the current kernel .config 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.
245linux_chkconfig_module() { 289linux_chkconfig_module() {
246local RESULT 290local RESULT
247 require_configured_kernel 291 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
292 local config
293 config="${KV_OUT_DIR}/.config"
294 [ ! -f "${config}" ] && config="/proc/config.gz"
248 RESULT="$(getfilevar_noexec CONFIG_${1} ${KV_OUT_DIR}/.config)" 295 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
249 [ "${RESULT}" = "m" ] && return 0 || return 1 296 [ "${RESULT}" = "m" ] && return 0 || return 1
250} 297}
251 298
252# @FUNCTION: linux_chkconfig_builtin 299# @FUNCTION: linux_chkconfig_builtin
253# @USAGE: option 300# @USAGE: option
254# @RETURN: true or false 301# @RETURN: true or false
255# @DESCRIPTION: 302# @DESCRIPTION:
256# It checks that CONFIG_<option>=y is present in the current kernel .config 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.
257linux_chkconfig_builtin() { 306linux_chkconfig_builtin() {
258local RESULT 307local RESULT
259 require_configured_kernel 308 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
309 local config
310 config="${KV_OUT_DIR}/.config"
311 [ ! -f "${config}" ] && config="/proc/config.gz"
260 RESULT="$(getfilevar_noexec CONFIG_${1} ${KV_OUT_DIR}/.config)" 312 RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
261 [ "${RESULT}" = "y" ] && return 0 || return 1 313 [ "${RESULT}" = "y" ] && return 0 || return 1
262} 314}
263 315
264# @FUNCTION: linux_chkconfig_string 316# @FUNCTION: linux_chkconfig_string
265# @USAGE: option 317# @USAGE: option
266# @RETURN: CONFIG_<option> 318# @RETURN: CONFIG_<option>
267# @DESCRIPTION: 319# @DESCRIPTION:
268# It prints the CONFIG_<option> value of the current kernel .config (it requires a configured kernel). 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.
269linux_chkconfig_string() { 323linux_chkconfig_string() {
270 require_configured_kernel 324 [ -z "${I_KNOW_WHAT_I_AM_DOING}" ] && require_configured_kernel
325 local config
326 config="${KV_OUT_DIR}/.config"
327 [ ! -f "${config}" ] && config="/proc/config.gz"
271 getfilevar_noexec "CONFIG_${1}" "${KV_OUT_DIR}/.config" 328 getfilevar_noexec "CONFIG_${1}" "${config}"
272} 329}
273 330
274# Versioning Functions 331# Versioning Functions
275# --------------------------------------- 332# ---------------------------------------
276 333
729# @FUNCTION: linux-info_pkg_setup 786# @FUNCTION: linux-info_pkg_setup
730# @DESCRIPTION: 787# @DESCRIPTION:
731# Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured 788# Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
732# to support the options specified in CONFIG_CHECK (if not null) 789# to support the options specified in CONFIG_CHECK (if not null)
733linux-info_pkg_setup() { 790linux-info_pkg_setup() {
734 get_version || die "Unable to calculate Linux Kernel version" 791 get_version
792 if [[ $rc -ne 0 ]]; then
793 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
794 get_running_version
795 fi
735 796
736 if kernel_is 2 4; then 797 if kernel_is 2 4; then
737 if [ "$( gcc-major-version )" -eq "4" ] ; then 798 if [ "$( gcc-major-version )" -eq "4" ] ; then
738 echo 799 echo
739 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with" 800 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"

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