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Revision 1.92 - (hide annotations) (download)
Tue Jun 26 00:06:14 2012 UTC (2 years, 2 months ago) by robbat2
Branch: MAIN
Changes since 1.91: +10 -2 lines
You must ensure at least one of the version setup functions gets called in linux-info.eclass before you can use the config functions.

1 robbat2 1.92 # Copyright 1999-2012 Gentoo Foundation
2 johnm 1.1 # Distributed under the terms of the GNU General Public License v2
3 robbat2 1.92 # $Header: /var/cvsroot/gentoo-x86/eclass/linux-info.eclass,v 1.91 2011/12/12 22:01:37 vapier Exp $
4 johnm 1.10
5 dsd 1.56 # @ECLASS: linux-info.eclass
6     # @MAINTAINER:
7     # kernel-misc@gentoo.org
8 vapier 1.90 # @AUTHOR:
9     # Original author: John Mylchreest <johnm@gentoo.org>
10 dsd 1.56 # @BLURB: eclass used for accessing kernel related information
11     # @DESCRIPTION:
12     # This eclass is used as a central eclass for accessing kernel
13 robbat2 1.62 # related information for source or binary already installed.
14 dsd 1.56 # It is vital for linux-mod.eclass to function correctly, and is split
15     # out so that any ebuild behaviour "templates" are abstracted out
16     # using additional eclasses.
17 robbat2 1.62 #
18     # "kernel config" in this file means:
19     # The .config of the currently installed sources is used as the first
20     # preference, with a fall-back to bundled config (/proc/config.gz) if available.
21 robbat2 1.92 #
22     # Before using any of the config-handling functions in this eclass, you must
23     # ensure that one of the following functions has been called (in order of
24     # preference), otherwise you will get bugs like #364041):
25     # linux-info_pkg_setup
26     # linux-info_get_any_version
27     # get_version
28     # get_running_version
29 dsd 1.56
30 johnm 1.10 # A Couple of env vars are available to effect usage of this eclass
31     # These are as follows:
32 dsd 1.56
33     # @ECLASS-VARIABLE: KERNEL_DIR
34     # @DESCRIPTION:
35     # A string containing the directory of the target kernel sources. The default value is
36     # "/usr/src/linux"
37    
38     # @ECLASS-VARIABLE: CONFIG_CHECK
39     # @DESCRIPTION:
40     # A string containing a list of .config options to check for before
41     # proceeding with the install.
42     #
43     # e.g.: CONFIG_CHECK="MTRR"
44     #
45     # You can also check that an option doesn't exist by
46     # prepending it with an exclamation mark (!).
47     #
48     # e.g.: CONFIG_CHECK="!MTRR"
49     #
50 vapier 1.89 # To simply warn about a missing option, prepend a '~'.
51 robbat2 1.62 # It may be combined with '!'.
52     #
53     # In general, most checks should be non-fatal. The only time fatal checks should
54     # be used is for building kernel modules or cases that a compile will fail
55     # without the option.
56     #
57     # This is to allow usage of binary kernels, and minimal systems without kernel
58     # sources.
59 dsd 1.56
60     # @ECLASS-VARIABLE: ERROR_<CFG>
61     # @DESCRIPTION:
62     # A string containing the error message to display when the check against CONFIG_CHECK
63     # fails. <CFG> should reference the appropriate option used in CONFIG_CHECK.
64 swegener 1.29 #
65 dsd 1.56 # e.g.: ERROR_MTRR="MTRR exists in the .config but shouldn't!!"
66    
67     # @ECLASS-VARIABLE: KBUILD_OUTPUT
68     # @DESCRIPTION:
69     # A string passed on commandline, or set from the kernel makefile. It contains the directory
70     # which is to be used as the kernel object directory.
71 johnm 1.10
72     # There are also a couple of variables which are set by this, and shouldn't be
73     # set by hand. These are as follows:
74 dsd 1.56
75     # @ECLASS-VARIABLE: KV_FULL
76     # @DESCRIPTION:
77     # A read-only variable. It's a string containing the full kernel version. ie: 2.6.9-gentoo-johnm-r1
78    
79     # @ECLASS-VARIABLE: KV_MAJOR
80     # @DESCRIPTION:
81     # A read-only variable. It's an integer containing the kernel major version. ie: 2
82    
83     # @ECLASS-VARIABLE: KV_MINOR
84     # @DESCRIPTION:
85     # A read-only variable. It's an integer containing the kernel minor version. ie: 6
86    
87     # @ECLASS-VARIABLE: KV_PATCH
88     # @DESCRIPTION:
89     # A read-only variable. It's an integer containing the kernel patch version. ie: 9
90    
91     # @ECLASS-VARIABLE: KV_EXTRA
92     # @DESCRIPTION:
93     # A read-only variable. It's a string containing the kernel EXTRAVERSION. ie: -gentoo
94    
95     # @ECLASS-VARIABLE: KV_LOCAL
96     # @DESCRIPTION:
97     # A read-only variable. It's a string containing the kernel LOCALVERSION concatenation. ie: -johnm
98    
99     # @ECLASS-VARIABLE: KV_DIR
100     # @DESCRIPTION:
101     # A read-only variable. It's a string containing the kernel source directory, will be null if
102     # KERNEL_DIR is invalid.
103    
104     # @ECLASS-VARIABLE: KV_OUT_DIR
105     # @DESCRIPTION:
106     # A read-only variable. It's a string containing the kernel object directory, will be KV_DIR unless
107     # KBUILD_OUTPUT is used. This should be used for referencing .config.
108 johnm 1.10
109 johnm 1.21 # And to ensure all the weirdness with crosscompile
110 johnm 1.23 inherit toolchain-funcs versionator
111 johnm 1.1
112 johnm 1.8 EXPORT_FUNCTIONS pkg_setup
113 johnm 1.1
114 robbat2 1.65 DEPEND=""
115     RDEPEND=""
116    
117 johnm 1.1 # Overwritable environment Var's
118     # ---------------------------------------
119 johnm 1.21 KERNEL_DIR="${KERNEL_DIR:-${ROOT}usr/src/linux}"
120 johnm 1.1
121 johnm 1.7
122 johnm 1.16 # Bug fixes
123     # fix to bug #75034
124     case ${ARCH} in
125 swegener 1.29 ppc) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
126     ppc64) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
127 johnm 1.16 esac
128    
129 vapier 1.51 # @FUNCTION: set_arch_to_kernel
130     # @DESCRIPTION:
131     # Set the env ARCH to match what the kernel expects.
132     set_arch_to_kernel() { export ARCH=$(tc-arch-kernel); }
133     # @FUNCTION: set_arch_to_portage
134     # @DESCRIPTION:
135     # Set the env ARCH to match what portage expects.
136     set_arch_to_portage() { export ARCH=$(tc-arch); }
137 johnm 1.11
138     # qeinfo "Message"
139     # -------------------
140 johnm 1.21 # qeinfo is a quiet einfo call when EBUILD_PHASE
141 johnm 1.11 # should not have visible output.
142 johnm 1.21 qout() {
143     local outputmsg type
144     type=${1}
145     shift
146     outputmsg="${@}"
147 wolf31o2 1.26 case "${EBUILD_PHASE}" in
148     depend) unset outputmsg;;
149     clean) unset outputmsg;;
150     preinst) unset outputmsg;;
151     esac
152     [ -n "${outputmsg}" ] && ${type} "${outputmsg}"
153 johnm 1.11 }
154    
155 johnm 1.21 qeinfo() { qout einfo "${@}" ; }
156 robbat2 1.82 qewarn() { qout ewarn "${@}" ; }
157 johnm 1.21 qeerror() { qout eerror "${@}" ; }
158 johnm 1.11
159 johnm 1.1 # File Functions
160     # ---------------------------------------
161    
162 dsd 1.56 # @FUNCTION: getfilevar
163     # @USAGE: variable configfile
164     # @RETURN: the value of the variable
165     # @DESCRIPTION:
166 robbat2 1.61 # It detects the value of the variable defined in the file configfile. This is
167     # done by including the configfile, and printing the variable with Make.
168     # It WILL break if your makefile has missing dependencies!
169 johnm 1.1 getfilevar() {
170 dsd 1.57 local ERROR basefname basedname myARCH="${ARCH}"
171 johnm 1.1 ERROR=0
172 johnm 1.16
173 johnm 1.1 [ -z "${1}" ] && ERROR=1
174     [ ! -f "${2}" ] && ERROR=1
175    
176     if [ "${ERROR}" = 1 ]
177     then
178 johnm 1.6 echo -e "\n"
179 johnm 1.1 eerror "getfilevar requires 2 variables, with the second a valid file."
180     eerror " getfilevar <VARIABLE> <CONFIGFILE>"
181     else
182 johnm 1.34 basefname="$(basename ${2})"
183     basedname="$(dirname ${2})"
184 johnm 1.6 unset ARCH
185 johnm 1.21
186 johnm 1.42 echo -e "e:\\n\\t@echo \$(${1})\\ninclude ${basefname}" | \
187 dsd 1.57 make -C "${basedname}" M="${S}" ${BUILD_FIXES} -s -f - 2>/dev/null
188 johnm 1.21
189     ARCH=${myARCH}
190 johnm 1.1 fi
191     }
192    
193 robbat2 1.61 # @FUNCTION: getfilevar_noexec
194     # @USAGE: variable configfile
195     # @RETURN: the value of the variable
196     # @DESCRIPTION:
197     # It detects the value of the variable defined in the file configfile.
198     # This is done with sed matching an expression only. If the variable is defined,
199     # you will run into problems. See getfilevar for those cases.
200     getfilevar_noexec() {
201 robbat2 1.62 local ERROR basefname basedname mycat myARCH="${ARCH}"
202 robbat2 1.61 ERROR=0
203 robbat2 1.62 mycat='cat'
204 robbat2 1.61
205     [ -z "${1}" ] && ERROR=1
206     [ ! -f "${2}" ] && ERROR=1
207 robbat2 1.64 [ "${2%.gz}" != "${2}" ] && mycat='zcat'
208 robbat2 1.61
209     if [ "${ERROR}" = 1 ]
210     then
211     echo -e "\n"
212     eerror "getfilevar_noexec requires 2 variables, with the second a valid file."
213     eerror " getfilevar_noexec <VARIABLE> <CONFIGFILE>"
214     else
215 robbat2 1.62 ${mycat} "${2}" | \
216 robbat2 1.61 sed -n \
217 vapier 1.89 -e "/^[[:space:]]*${1}[[:space:]]*:\\?=[[:space:]]*\(.*\)\$/{
218 robbat2 1.61 s,^[^=]*[[:space:]]*=[[:space:]]*,,g ;
219     s,[[:space:]]*\$,,g ;
220     p
221 robbat2 1.62 }"
222 robbat2 1.61 fi
223     }
224    
225 vapier 1.90 # @ECLASS-VARIABLE: _LINUX_CONFIG_EXISTS_DONE
226     # @INTERNAL
227 robbat2 1.75 # @DESCRIPTION:
228     # This is only set if one of the linux_config_*exists functions has been called.
229     # We use it for a QA warning that the check for a config has not been performed,
230     # as linux_chkconfig* in non-legacy mode WILL return an undefined value if no
231     # config is available at all.
232     _LINUX_CONFIG_EXISTS_DONE=
233    
234     linux_config_qa_check() {
235 robbat2 1.76 local f="$1"
236 robbat2 1.75 if [ -z "${_LINUX_CONFIG_EXISTS_DONE}" ]; then
237 robbat2 1.76 ewarn "QA: You called $f before any linux_config_exists!"
238 cardoe 1.87 ewarn "QA: The return value of $f will NOT guaranteed later!"
239 robbat2 1.75 fi
240     }
241 dsd 1.53
242 robbat2 1.62 # @FUNCTION: linux_config_src_exists
243     # @RETURN: true or false
244     # @DESCRIPTION:
245     # It returns true if .config exists in a build directory otherwise false
246     linux_config_src_exists() {
247 robbat2 1.75 export _LINUX_CONFIG_EXISTS_DONE=1
248 robbat2 1.62 [ -s "${KV_OUT_DIR}/.config" ]
249     }
250    
251     # @FUNCTION: linux_config_bin_exists
252     # @RETURN: true or false
253     # @DESCRIPTION:
254     # It returns true if .config exists in /proc, otherwise false
255     linux_config_bin_exists() {
256 robbat2 1.75 export _LINUX_CONFIG_EXISTS_DONE=1
257 robbat2 1.79 [ -s "/proc/config.gz" ]
258 robbat2 1.62 }
259    
260 dsd 1.56 # @FUNCTION: linux_config_exists
261     # @RETURN: true or false
262     # @DESCRIPTION:
263     # It returns true if .config exists otherwise false
264 robbat2 1.62 #
265     # This function MUST be checked before using any of the linux_chkconfig_*
266     # functions.
267 dsd 1.53 linux_config_exists() {
268 robbat2 1.62 linux_config_src_exists || linux_config_bin_exists
269 dsd 1.53 }
270    
271 dsd 1.56 # @FUNCTION: require_configured_kernel
272     # @DESCRIPTION:
273     # This function verifies that the current kernel is configured (it checks against the existence of .config)
274     # otherwise it dies.
275 dsd 1.53 require_configured_kernel() {
276 robbat2 1.62 if ! linux_config_src_exists; then
277 dsd 1.53 qeerror "Could not find a usable .config in the kernel source directory."
278     qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources."
279     qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that"
280     qeerror "it points to the necessary object directory so that it might find .config."
281     die "Kernel not configured; no .config found in ${KV_OUT_DIR}"
282     fi
283     }
284    
285 dsd 1.56 # @FUNCTION: linux_chkconfig_present
286     # @USAGE: option
287     # @RETURN: true or false
288     # @DESCRIPTION:
289 loki_val 1.59 # It checks that CONFIG_<option>=y or CONFIG_<option>=m is present in the current kernel .config
290 robbat2 1.62 # If linux_config_exists returns false, the results of this are UNDEFINED. You
291     # MUST call linux_config_exists first.
292 johnm 1.7 linux_chkconfig_present() {
293 robbat2 1.76 linux_config_qa_check linux_chkconfig_present
294 robbat2 1.75 local RESULT
295 robbat2 1.62 local config
296     config="${KV_OUT_DIR}/.config"
297     [ ! -f "${config}" ] && config="/proc/config.gz"
298     RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
299 johnm 1.1 [ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1
300     }
301    
302 dsd 1.56 # @FUNCTION: linux_chkconfig_module
303     # @USAGE: option
304     # @RETURN: true or false
305     # @DESCRIPTION:
306     # It checks that CONFIG_<option>=m is present in the current kernel .config
307 robbat2 1.62 # If linux_config_exists returns false, the results of this are UNDEFINED. You
308     # MUST call linux_config_exists first.
309 johnm 1.7 linux_chkconfig_module() {
310 robbat2 1.76 linux_config_qa_check linux_chkconfig_module
311 robbat2 1.75 local RESULT
312 robbat2 1.62 local config
313     config="${KV_OUT_DIR}/.config"
314     [ ! -f "${config}" ] && config="/proc/config.gz"
315     RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
316 johnm 1.1 [ "${RESULT}" = "m" ] && return 0 || return 1
317     }
318    
319 dsd 1.56 # @FUNCTION: linux_chkconfig_builtin
320     # @USAGE: option
321     # @RETURN: true or false
322     # @DESCRIPTION:
323     # It checks that CONFIG_<option>=y is present in the current kernel .config
324 robbat2 1.62 # If linux_config_exists returns false, the results of this are UNDEFINED. You
325     # MUST call linux_config_exists first.
326 johnm 1.7 linux_chkconfig_builtin() {
327 robbat2 1.76 linux_config_qa_check linux_chkconfig_builtin
328 robbat2 1.75 local RESULT
329 robbat2 1.62 local config
330     config="${KV_OUT_DIR}/.config"
331     [ ! -f "${config}" ] && config="/proc/config.gz"
332     RESULT="$(getfilevar_noexec CONFIG_${1} "${config}")"
333 johnm 1.1 [ "${RESULT}" = "y" ] && return 0 || return 1
334     }
335    
336 dsd 1.56 # @FUNCTION: linux_chkconfig_string
337     # @USAGE: option
338     # @RETURN: CONFIG_<option>
339     # @DESCRIPTION:
340     # It prints the CONFIG_<option> value of the current kernel .config (it requires a configured kernel).
341 robbat2 1.62 # If linux_config_exists returns false, the results of this are UNDEFINED. You
342     # MUST call linux_config_exists first.
343 johnm 1.7 linux_chkconfig_string() {
344 robbat2 1.76 linux_config_qa_check linux_chkconfig_string
345 robbat2 1.62 local config
346     config="${KV_OUT_DIR}/.config"
347     [ ! -f "${config}" ] && config="/proc/config.gz"
348     getfilevar_noexec "CONFIG_${1}" "${config}"
349 johnm 1.7 }
350    
351 johnm 1.1 # Versioning Functions
352     # ---------------------------------------
353    
354 dsd 1.56 # @FUNCTION: kernel_is
355     # @USAGE: [-lt -gt -le -ge -eq] major_number [minor_number patch_number]
356     # @RETURN: true or false
357     # @DESCRIPTION:
358     # It returns true when the current kernel version satisfies the comparison against the passed version.
359     # -eq is the default comparison.
360 johnm 1.1 #
361 dsd 1.56 # @CODE
362 johnm 1.1 # For Example where KV = 2.6.9
363 dsd 1.56 # kernel_is 2 4 returns false
364     # kernel_is 2 returns true
365     # kernel_is 2 6 returns true
366     # kernel_is 2 6 8 returns false
367     # kernel_is 2 6 9 returns true
368     # @CODE
369    
370 vapier 1.91 # Note: duplicated in kernel-2.eclass
371 johnm 1.1 kernel_is() {
372 dsd 1.53 # if we haven't determined the version yet, we need to.
373 robbat2 1.69 linux-info_get_any_version
374    
375 vapier 1.91 # Now we can continue
376     local operator test value
377 johnm 1.23
378 vapier 1.91 case ${1#-} in
379     lt) operator="-lt"; shift;;
380     gt) operator="-gt"; shift;;
381     le) operator="-le"; shift;;
382     ge) operator="-ge"; shift;;
383     eq) operator="-eq"; shift;;
384     *) operator="-eq";;
385 johnm 1.23 esac
386 vapier 1.91 [[ $# -gt 3 ]] && die "Error in kernel-2_kernel_is(): too many parameters"
387 johnm 1.23
388 vapier 1.91 : $(( test = (KV_MAJOR << 16) + (KV_MINOR << 8) + KV_PATCH ))
389     : $(( value = (${1:-${KV_MAJOR}} << 16) + (${2:-${KV_MINOR}} << 8) + ${3:-${KV_PATCH}} ))
390     [ ${test} ${operator} ${value} ]
391 johnm 1.1 }
392    
393 johnm 1.30 get_localversion() {
394     local lv_list i x
395    
396     # ignore files with ~ in it.
397     for i in $(ls ${1}/localversion* 2>/dev/null); do
398     [[ -n ${i//*~*} ]] && lv_list="${lv_list} ${i}"
399     done
400    
401     for i in ${lv_list}; do
402     x="${x}$(<${i})"
403     done
404     x=${x/ /}
405     echo ${x}
406     }
407    
408 robbat2 1.83 # Check if the Makefile is valid for direct parsing.
409     # Check status results:
410     # - PASS, use 'getfilevar' to extract values
411     # - FAIL, use 'getfilevar_noexec' to extract values
412     # The check may fail if:
413     # - make is not present
414     # - corruption exists in the kernel makefile
415     get_makefile_extract_function() {
416     local a='' b='' mkfunc='getfilevar'
417     a="$(getfilevar VERSION ${KERNEL_MAKEFILE})"
418     b="$(getfilevar_noexec VERSION ${KERNEL_MAKEFILE})"
419     [[ "${a}" != "${b}" ]] && mkfunc='getfilevar_noexec'
420     echo "${mkfunc}"
421     }
422    
423 robbat2 1.63 # internal variable, so we know to only print the warning once
424     get_version_warning_done=
425    
426 dsd 1.56 # @FUNCTION: get_version
427     # @DESCRIPTION:
428     # It gets the version of the kernel inside KERNEL_DIR and populates the KV_FULL variable
429     # (if KV_FULL is already set it does nothing).
430     #
431     # The kernel version variables (KV_MAJOR, KV_MINOR, KV_PATCH, KV_EXTRA and KV_LOCAL) are also set.
432     #
433     # The KV_DIR is set using the KERNEL_DIR env var, the KV_DIR_OUT is set using a valid
434     # KBUILD_OUTPUT (in a decreasing priority list, we look for the env var, makefile var or the
435     # symlink /lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build).
436 johnm 1.1 get_version() {
437 robbat2 1.86 local kbuild_output mkfunc tmplocal
438 swegener 1.29
439 johnm 1.1 # no need to execute this twice assuming KV_FULL is populated.
440     # we can force by unsetting KV_FULL
441 johnm 1.19 [ -n "${KV_FULL}" ] && return 0
442 johnm 1.1
443     # if we dont know KV_FULL, then we need too.
444     # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
445     unset KV_DIR
446    
447     # KV_DIR will contain the full path to the sources directory we should use
448 robbat2 1.63 [ -z "${get_version_warning_done}" ] && \
449 johnm 1.11 qeinfo "Determining the location of the kernel source code"
450 johnm 1.1 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
451     [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
452 swegener 1.29
453 johnm 1.1 if [ -z "${KV_DIR}" ]
454     then
455 robbat2 1.63 if [ -z "${get_version_warning_done}" ]; then
456     get_version_warning_done=1
457     qeerror "Unable to find kernel sources at ${KERNEL_DIR}"
458     #qeinfo "This package requires Linux sources."
459     if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
460     qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
461     qeinfo "(or the kernel you wish to build against)."
462     qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
463     else
464     qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
465     fi
466 johnm 1.7 fi
467 johnm 1.19 return 1
468 johnm 1.7 fi
469    
470 robbat2 1.63 if [ -z "${get_version_warning_done}" ]; then
471     qeinfo "Found kernel source directory:"
472     qeinfo " ${KV_DIR}"
473     fi
474 johnm 1.7
475     if [ ! -s "${KV_DIR}/Makefile" ]
476     then
477 robbat2 1.63 if [ -z "${get_version_warning_done}" ]; then
478     get_version_warning_done=1
479     qeerror "Could not find a Makefile in the kernel source directory."
480     qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
481     fi
482 johnm 1.19 return 1
483 johnm 1.7 fi
484 swegener 1.29
485 johnm 1.4 # OK so now we know our sources directory, but they might be using
486     # KBUILD_OUTPUT, and we need this for .config and localversions-*
487     # so we better find it eh?
488     # do we pass KBUILD_OUTPUT on the CLI?
489     OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}"
490 swegener 1.29
491 robbat2 1.78 # keep track of it
492     KERNEL_MAKEFILE="${KV_DIR}/Makefile"
493 vapier 1.89
494 robbat2 1.83 # Decide the function used to extract makefile variables.
495     mkfunc="$(get_makefile_extract_function "${KERNEL_MAKEFILE}")"
496 robbat2 1.78
497 johnm 1.6 # And if we didn't pass it, we can take a nosey in the Makefile
498 robbat2 1.78 kbuild_output="$(${mkfunc} KBUILD_OUTPUT ${KERNEL_MAKEFILE})"
499 johnm 1.4 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
500 swegener 1.29
501 johnm 1.1 # And contrary to existing functions I feel we shouldn't trust the
502     # directory name to find version information as this seems insane.
503 robbat2 1.78 # so we parse ${KERNEL_MAKEFILE}
504     KV_MAJOR="$(${mkfunc} VERSION ${KERNEL_MAKEFILE})"
505     KV_MINOR="$(${mkfunc} PATCHLEVEL ${KERNEL_MAKEFILE})"
506     KV_PATCH="$(${mkfunc} SUBLEVEL ${KERNEL_MAKEFILE})"
507     KV_EXTRA="$(${mkfunc} EXTRAVERSION ${KERNEL_MAKEFILE})"
508 swegener 1.29
509 johnm 1.7 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
510     then
511 robbat2 1.63 if [ -z "${get_version_warning_done}" ]; then
512     get_version_warning_done=1
513     qeerror "Could not detect kernel version."
514     qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
515     fi
516 johnm 1.19 return 1
517 johnm 1.7 fi
518 swegener 1.29
519 johnm 1.1 # and in newer versions we can also pull LOCALVERSION if it is set.
520 johnm 1.4 # but before we do this, we need to find if we use a different object directory.
521     # This *WILL* break if the user is using localversions, but we assume it was
522     # caught before this if they are.
523 robbat2 1.81 OUTPUT_DIR="${OUTPUT_DIR:-/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build}"
524 johnm 1.4
525     [ -h "${OUTPUT_DIR}" ] && KV_OUT_DIR="$(readlink -f ${OUTPUT_DIR})"
526     [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
527     if [ -n "${KV_OUT_DIR}" ];
528     then
529 johnm 1.11 qeinfo "Found kernel object directory:"
530     qeinfo " ${KV_OUT_DIR}"
531 johnm 1.4 fi
532 johnm 1.41 # and if we STILL have not got it, then we better just set it to KV_DIR
533 johnm 1.4 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
534 johnm 1.21
535 robbat2 1.86 # Grab the kernel release from the output directory.
536     # TODO: we MUST detect kernel.release being out of date, and 'return 1' from
537     # this function.
538     if [ -s "${KV_OUT_DIR}"/include/config/kernel.release ]; then
539     KV_LOCAL=$(<"${KV_OUT_DIR}"/include/config/kernel.release)
540     elif [ -s "${KV_OUT_DIR}"/.kernelrelease ]; then
541     KV_LOCAL=$(<"${KV_OUT_DIR}"/.kernelrelease)
542     else
543     KV_LOCAL=
544     fi
545 robbat2 1.85
546 robbat2 1.86 # KV_LOCAL currently contains the full release; discard the first bits.
547     tmplocal=${KV_LOCAL#${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}}
548 dsd 1.53
549 robbat2 1.86 # If the updated local version was not changed, the tree is not prepared.
550     # Clear out KV_LOCAL in that case.
551     # TODO: this does not detect a change in the localversion part between
552     # kernel.release and the value that would be generated.
553     if [ "$KV_LOCAL" = "$tmplocal" ]; then
554     KV_LOCAL=
555 robbat2 1.85 else
556 robbat2 1.86 KV_LOCAL=$tmplocal
557 johnm 1.41 fi
558    
559 johnm 1.1 # And we should set KV_FULL to the full expanded version
560     KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
561 johnm 1.21
562 johnm 1.11 qeinfo "Found sources for kernel version:"
563     qeinfo " ${KV_FULL}"
564 johnm 1.21
565 johnm 1.19 return 0
566 johnm 1.1 }
567    
568 dsd 1.56 # @FUNCTION: get_running_version
569     # @DESCRIPTION:
570     # It gets the version of the current running kernel and the result is the same as get_version() if the
571     # function can find the sources.
572 johnm 1.23 get_running_version() {
573     KV_FULL=$(uname -r)
574 johnm 1.1
575 abcd 1.84 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile && -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
576     KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
577     KBUILD_OUTPUT=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
578     unset KV_FULL
579     get_version
580     return $?
581     elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
582 johnm 1.23 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
583     unset KV_FULL
584     get_version
585     return $?
586     elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
587     KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
588     unset KV_FULL
589     get_version
590     return $?
591     else
592     KV_MAJOR=$(get_version_component_range 1 ${KV_FULL})
593     KV_MINOR=$(get_version_component_range 2 ${KV_FULL})
594 flameeyes 1.88 KV_PATCH=$(get_version_component_range 3 ${KV_FULL})
595 johnm 1.23 KV_PATCH=${KV_PATCH//-*}
596 flameeyes 1.88 KV_EXTRA="${KV_FULL#${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}}"
597 johnm 1.23 fi
598     return 0
599     }
600 johnm 1.1
601 robbat2 1.66 # This next function is named with the eclass prefix to avoid conflicts with
602     # some old versionator-like eclass functions.
603    
604     # @FUNCTION: linux-info_get_any_version
605     # @DESCRIPTION:
606     # This attempts to find the version of the sources, and otherwise falls back to
607     # the version of the running kernel.
608     linux-info_get_any_version() {
609 maekke 1.73 get_version
610 robbat2 1.67 if [[ $? -ne 0 ]]; then
611 robbat2 1.66 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
612 maekke 1.73 get_running_version
613 robbat2 1.66 fi
614     }
615    
616 johnm 1.1
617     # ebuild check functions
618     # ---------------------------------------
619    
620 dsd 1.56 # @FUNCTION: check_kernel_built
621     # @DESCRIPTION:
622     # This function verifies that the current kernel sources have been already prepared otherwise it dies.
623 johnm 1.1 check_kernel_built() {
624 dsd 1.53 # if we haven't determined the version yet, we need to
625 dsd 1.54 require_configured_kernel
626 dsd 1.53 get_version
627 swegener 1.29
628 johnm 1.16 if [ ! -f "${KV_OUT_DIR}/include/linux/version.h" ]
629 johnm 1.1 then
630 johnm 1.16 eerror "These sources have not yet been prepared."
631     eerror "We cannot build against an unprepared tree."
632 johnm 1.1 eerror "To resolve this, please type the following:"
633     eerror
634     eerror "# cd ${KV_DIR}"
635     eerror "# make oldconfig"
636 johnm 1.16 eerror "# make modules_prepare"
637 johnm 1.1 eerror
638     eerror "Then please try merging this module again."
639     die "Kernel sources need compiling first"
640     fi
641     }
642    
643 dsd 1.56 # @FUNCTION: check_modules_supported
644     # @DESCRIPTION:
645     # This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
646 johnm 1.1 check_modules_supported() {
647     # if we haven't determined the version yet, we need too.
648 dsd 1.53 require_configured_kernel
649     get_version
650 swegener 1.29
651 johnm 1.7 if ! linux_chkconfig_builtin "MODULES"
652 johnm 1.1 then
653     eerror "These sources do not support loading external modules."
654     eerror "to be able to use this module please enable \"Loadable modules support\""
655     eerror "in your kernel, recompile and then try merging this module again."
656 johnm 1.7 die "No support for external modules in ${KV_FULL} config"
657 johnm 1.3 fi
658     }
659    
660 dsd 1.56 # @FUNCTION: check_extra_config
661     # @DESCRIPTION:
662     # It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
663     # the prefix ~ is not used) doesn't satisfy the directive.
664 johnm 1.3 check_extra_config() {
665 mrness 1.45 local config negate die error reworkmodulenames
666 dsd 1.53 local soft_errors_count=0 hard_errors_count=0 config_required=0
667 robbat2 1.75 # store the value of the QA check, because otherwise we won't catch usages
668     # after if check_extra_config is called AND other direct calls are done
669     # later.
670     local old_LINUX_CONFIG_EXISTS_DONE="${_LINUX_CONFIG_EXISTS_DONE}"
671 dsd 1.53
672 dsd 1.55 # if we haven't determined the version yet, we need to
673 robbat2 1.70 linux-info_get_any_version
674 dsd 1.55
675 dsd 1.53 # Determine if we really need a .config. The only time when we don't need
676     # one is when all of the CONFIG_CHECK options are prefixed with "~".
677     for config in ${CONFIG_CHECK}
678     do
679     if [[ "${config:0:1}" != "~" ]]; then
680     config_required=1
681     break
682     fi
683     done
684    
685     if [[ ${config_required} == 0 ]]; then
686     # In the case where we don't require a .config, we can now bail out
687     # if the user has no .config as there is nothing to do. Otherwise
688     # code later will cause a failure due to missing .config.
689 robbat2 1.79 if ! linux_config_exists; then
690 robbat2 1.60 ewarn "Unable to check for the following kernel config options due"
691 robbat2 1.64 ewarn "to absence of any configured kernel sources or compiled"
692     ewarn "config:"
693 robbat2 1.60 for config in ${CONFIG_CHECK}; do
694 robbat2 1.77 local_error="ERROR_${config#\~}"
695     msg="${!local_error}"
696     if [[ "x${msg}" == "x" ]]; then
697     local_error="WARNING_${config#\~}"
698     msg="${!local_error}"
699     fi
700     ewarn " - ${config#\~}${msg:+ - }${msg}"
701 robbat2 1.60 done
702     ewarn "You're on your own to make sure they are set if needed."
703 robbat2 1.75 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
704 dsd 1.53 return 0
705     fi
706     else
707 robbat2 1.79 require_configured_kernel
708 dsd 1.53 fi
709 johnm 1.3
710 mrness 1.45 einfo "Checking for suitable kernel configuration options..."
711 maekke 1.58
712 johnm 1.3 for config in ${CONFIG_CHECK}
713     do
714 johnm 1.31 # if we specify any fatal, ensure we honor them
715     die=1
716     error=0
717     negate=0
718     reworkmodulenames=0
719    
720 dsd 1.53 if [[ ${config:0:1} == "~" ]]; then
721 mrness 1.45 die=0
722 johnm 1.31 config=${config:1}
723 dsd 1.53 elif [[ ${config:0:1} == "@" ]]; then
724 mrness 1.45 die=0
725 johnm 1.31 reworkmodulenames=1
726     config=${config:1}
727     fi
728 dsd 1.53 if [[ ${config:0:1} == "!" ]]; then
729 mrness 1.45 negate=1
730 johnm 1.44 config=${config:1}
731     fi
732 johnm 1.17
733 johnm 1.31 if [[ ${negate} == 1 ]]; then
734     linux_chkconfig_present ${config} && error=2
735     elif [[ ${reworkmodulenames} == 1 ]]; then
736 mrness 1.45 local temp_config="${config//*:}" i n
737 johnm 1.17 config="${config//:*}"
738 johnm 1.31 if linux_chkconfig_present ${config}; then
739     for i in ${MODULE_NAMES}; do
740 johnm 1.17 n="${i//${temp_config}}"
741 dsd 1.38 [[ -z ${n//\(*} ]] && \
742 johnm 1.31 MODULE_IGNORE="${MODULE_IGNORE} ${temp_config}"
743 johnm 1.17 done
744 johnm 1.31 error=2
745 johnm 1.17 fi
746 johnm 1.3 else
747 johnm 1.31 linux_chkconfig_present ${config} || error=1
748     fi
749    
750 mrness 1.45 if [[ ${error} > 0 ]]; then
751     local report_func="eerror" local_error
752     local_error="ERROR_${config}"
753     local_error="${!local_error}"
754    
755     if [[ -z "${local_error}" ]]; then
756     # using old, deprecated format.
757     local_error="${config}_ERROR"
758     local_error="${!local_error}"
759     fi
760     if [[ ${die} == 0 && -z "${local_error}" ]]; then
761     #soft errors can be warnings
762     local_error="WARNING_${config}"
763 johnm 1.7 local_error="${!local_error}"
764 mrness 1.45 if [[ -n "${local_error}" ]] ; then
765     report_func="ewarn"
766 johnm 1.44 fi
767 mrness 1.45 fi
768 johnm 1.44
769 mrness 1.45 if [[ -z "${local_error}" ]]; then
770     [[ ${error} == 1 ]] \
771     && local_error="is not set when it should be." \
772     || local_error="should not be set. But it is."
773     local_error="CONFIG_${config}:\t ${local_error}"
774     fi
775     if [[ ${die} == 0 ]]; then
776     ${report_func} " ${local_error}"
777     soft_errors_count=$[soft_errors_count + 1]
778     else
779     ${report_func} " ${local_error}"
780     hard_errors_count=$[hard_errors_count + 1]
781 johnm 1.3 fi
782     fi
783     done
784    
785 mrness 1.45 if [[ ${hard_errors_count} > 0 ]]; then
786 johnm 1.3 eerror "Please check to make sure these options are set correctly."
787 johnm 1.31 eerror "Failure to do so may cause unexpected problems."
788 mrness 1.45 eerror "Once you have satisfied these options, please try merging"
789     eerror "this package again."
790 robbat2 1.75 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
791 mrness 1.45 die "Incorrect kernel configuration options"
792     elif [[ ${soft_errors_count} > 0 ]]; then
793     ewarn "Please check to make sure these options are set correctly."
794     ewarn "Failure to do so may cause unexpected problems."
795     else
796     eend 0
797 johnm 1.1 fi
798 robbat2 1.75 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
799 johnm 1.1 }
800    
801     check_zlibinflate() {
802 dsd 1.53 # if we haven't determined the version yet, we need to
803     require_configured_kernel
804     get_version
805 swegener 1.29
806 johnm 1.1 # although I restructured this code - I really really really dont support it!
807    
808     # bug #27882 - zlib routines are only linked into the kernel
809     # if something compiled into the kernel calls them
810     #
811     # plus, for the cloop module, it appears that there's no way
812     # to get cloop.o to include a static zlib if CONFIG_MODVERSIONS
813     # is on
814 swegener 1.29
815     local INFLATE
816     local DEFLATE
817 johnm 1.1
818     einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
819 swegener 1.29
820 johnm 1.1 ebegin "checking ZLIB_INFLATE"
821 robbat2 1.61 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
822 johnm 1.1 eend $?
823     [ "$?" != 0 ] && die
824 swegener 1.29
825 johnm 1.1 ebegin "checking ZLIB_DEFLATE"
826 robbat2 1.61 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
827 johnm 1.1 eend $?
828     [ "$?" != 0 ] && die
829 swegener 1.29
830 johnm 1.1 local LINENO_START
831     local LINENO_END
832     local SYMBOLS
833     local x
834 swegener 1.29
835 johnm 1.1 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
836     LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
837     (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
838     (( LINENO_END = $LINENO_END - 1 ))
839 johnm 1.4 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
840 johnm 1.1
841     # okay, now we have a list of symbols
842     # we need to check each one in turn, to see whether it is set or not
843     for x in $SYMBOLS ; do
844     if [ "${!x}" = "y" ]; then
845     # we have a winner!
846     einfo "${x} ensures zlib is linked into your kernel - excellent"
847     return 0
848     fi
849     done
850 swegener 1.29
851 johnm 1.1 eerror
852     eerror "This kernel module requires ZLIB library support."
853     eerror "You have enabled zlib support in your kernel, but haven't enabled"
854     eerror "enabled any option that will ensure that zlib is linked into your"
855     eerror "kernel."
856     eerror
857     eerror "Please ensure that you enable at least one of these options:"
858     eerror
859    
860     for x in $SYMBOLS ; do
861     eerror " * $x"
862     done
863    
864     eerror
865     eerror "Please remember to recompile and install your kernel, and reboot"
866     eerror "into your new kernel before attempting to load this kernel module."
867    
868     die "Kernel doesn't include zlib support"
869     }
870 johnm 1.8
871     ################################
872     # Default pkg_setup
873     # Also used when inheriting linux-mod to force a get_version call
874 dsd 1.56 # @FUNCTION: linux-info_pkg_setup
875     # @DESCRIPTION:
876     # Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
877     # to support the options specified in CONFIG_CHECK (if not null)
878 johnm 1.8 linux-info_pkg_setup() {
879 robbat2 1.66 linux-info_get_any_version
880 phreak 1.48
881     if kernel_is 2 4; then
882     if [ "$( gcc-major-version )" -eq "4" ] ; then
883     echo
884     ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"
885     ewarn "linux-2.4 (or modules building against a linux-2.4 kernel)!"
886     echo
887     ewarn "Either switch to another gcc-version (via gcc-config) or use a"
888     ewarn "newer kernel that supports gcc-4."
889     echo
890     ewarn "Also be aware that bugreports about gcc-4 not working"
891     ewarn "with linux-2.4 based ebuilds will be closed as INVALID!"
892     echo
893     epause 10
894     fi
895     fi
896    
897 johnm 1.10 [ -n "${CONFIG_CHECK}" ] && check_extra_config;
898 johnm 1.8 }

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