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Richard Purdie
65e67f4028
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>
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.