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Richard Purdie 65e67f4028 bitbake: data_smart: Ensure hash reflects vardepvalue flags correctly 
The get_hash() function is used to decide if the base configuration has changed
and hence whether a reparse is required. The vardepvalue flag's value was not
expanded but it is often used in contexts like:

METADATA_REVISION = "${@base_detect_revision(d)}"
METADATA_REVISION[vardepvalue] = "${METADATA_REVISION}"

which in it's unexpanded form means reparsing doesn't happen when it should
as the data appears unchanged. Update get_hash to expand the values of
vardepvalue so reparsing works as expected. This avoids basehash mismatch
errors such as the one recently caused by using METADATA_REVISION in poky.conf's
DISTRO_VERSION variable. The issue there could be exposed by a recipe using
DISTRO_VERSION with the sequence:

bitbake os-release
<change the revision of the metadata with a dummy commit>
bitbake os-release -C install

which was caused because METADATA_REVISION changed but the metadata didn't reparse.

(Bitbake rev: 26ccf1575aef2d6e2d7717d3bd10b1ed0d5a777d)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2020-12-19 17:18:07 +00:00
bitbake bitbake: data_smart: Ensure hash reflects vardepvalue flags correctly 2020-12-19 17:18:07 +00:00
contrib/artwork oe.svg: Copy artwork from openembedded-classic. 2019-10-08 11:22:24 +01:00
documentation releases: conf: add link to 3.2.1, update to include 3.2.1 2020-12-15 23:03:47 +00:00
meta binutils: add libopcodes package for perf 2020-12-18 22:52:25 +00:00
meta-poky poky: Set SDK_VERSION explicitly 2020-12-09 17:32:51 +00:00
meta-selftest wic-image-minimal: only depend on syslinux on x86 targets 2020-12-15 22:51:56 +00:00
meta-skeleton baremetal-helloworld: Fix install path since S doesnt have a trailing slash 2020-10-26 22:08:35 +00:00
meta-yocto-bsp linux-yocto: update genericx86* SRCREV for 5.8 2020-10-13 09:42:08 +01:00
scripts wic: Introduce empty plugin to create unformatted empty partitions 2020-12-15 22:51:56 +00:00
.gitignore scripts/install-buildtools: improvements 2020-04-01 11:44:23 +01:00
.templateconf meta-yocto: Rename to meta-poky to better match its purpose 2016-02-28 11:31:17 +00:00
LICENSE meta/lib+scripts: Convert to SPDX license headers 2019-05-09 16:31:55 +01:00
LICENSE.GPL-2.0-only meta/lib+scripts: Convert to SPDX license headers 2019-05-09 16:31:55 +01:00
LICENSE.MIT meta/lib+scripts: Convert to SPDX license headers 2019-05-09 16:31:55 +01:00
Makefile bitbake: sphinx: rename Makefile.sphinx 2020-10-06 13:54:27 +01:00
MEMORIAM MEMORIAM: Add recognition for contributors no longer with us 2020-01-30 15:22:35 +00:00
oe-init-build-env meta/lib+scripts: Convert to SPDX license headers 2019-05-09 16:31:55 +01:00
README.hardware meta-yocto: Restructure and tidy up READMEs 2017-09-14 13:36:22 +01:00
README.OE-Core README: Rename to README.OE-Core so its clear where its from/belongs/is about 2019-03-06 23:09:10 +00:00
README.poky meta-yocto: Restructure and tidy up READMEs 2017-09-14 13:36:22 +01:00
README.qemu README.qemu: qemuppc64 is not supported 2017-10-16 23:54:31 +01:00

README.qemu 

QEMU Emulation Targets
======================

To simplify development, the build system supports building images to
work with the QEMU emulator in system emulation mode. Several architectures
are currently supported in 32 and 64 bit variants:

  * ARM (qemuarm + qemuarm64)
  * x86 (qemux86 + qemux86-64)
  * PowerPC (qemuppc only)
  * MIPS (qemumips + qemumips64)

Use of the QEMU images is covered in the Yocto Project Reference Manual.
The appropriate MACHINE variable value corresponding to the target is given
in brackets.