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externalsrc: use shared stamp directory if B=S 

We have a common build directory for all target architectures if
externalsrc is used and ${B}=${S}. In this case we also need to have a
common stamp directory. The reason is that e.g. changing MACHINE will
basically "invalidate" the artefacts in ${B} (wrt. to the new MACHINE)
but old stamp files with matching hashes from an earlier build might be
available in the machine-specific stamps directory and tasks would not
be correctly re-run.

Previous attempt in f44f12af346888bdeb3ae01a275cb5dd4396b505 to handle
this correctly was faulty as it threw some spurious warnings and caused
do_configure to be re-run in every build if that would not be necessary.

[YOCTO #8950]
[YOCTO #9237]

(From OE-Core rev: f5031fb37ceef83c85f0dfec773da75c05b2a631)

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Markus Lehtonen 2016-03-18 09:41:51 +02:00 committed by Richard Purdie
parent 1969332422
commit 62ddde6ebe
1 changed files with 4 additions and 6 deletions
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10
meta/classes/externalsrc.bbclass
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@ -92,15 +92,13 @@ python () {
d.appendVar('RM_WORK_EXCLUDE', ' ' + d.getVar('PN', True))
# If B=S the same builddir is used even for different architectures.
# Thus, use a shared CONFIGURESTAMPFILE so that change of do_configure
# task hash is correctly detected if e.g. MACHINE changes. In addition,
# do_configure needs to depend on the stamp file so that the task is
# re-run when the stamp was changed since the last run on this
# architecture.
# Thus, use a shared CONFIGURESTAMPFILE and STAMP directory so that
# change of do_configure task hash is correctly detected and stamps are
# invalidated if e.g. MACHINE changes.
if d.getVar('S', True) == d.getVar('B', True):
configstamp = '${TMPDIR}/work-shared/${PN}/${EXTENDPE}${PV}-${PR}/configure.sstate'
d.setVar('CONFIGURESTAMPFILE', configstamp)
d.setVarFlag('do_configure', 'file-checksums', configstamp + ':True')
d.setVar('STAMP', '${STAMPS_DIR}/work-shared/${PN}/${EXTENDPE}${PV}-${PR}')
}
python externalsrc_configure_prefunc() {