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When devtool upgrade is upgrading to a new version where the source is fetched as an archive (e.g. a tarball), we create a single commit in the git repository that is the upgrade from the old version to the new. We do this by extracting the old source, committing it, deleting all files, copying in the new files, running git add on each new/changed/deleted file, and then committing the result. When a lot of files have changed in an upgrade (such as QEMU 2.8.1.1 -> 2.10.0) the penultimate step of running git add it can take quite a long time; in order to reduce this and show some feedback to the user, run git add with batches of 100 files at once and also show a progress bar. In a local test with the aforementioned QEMU upgrade it took the time down from over 7 minutes down to about 13 seconds. Fixes [YOCTO #11948]. (From OE-Core rev: 8b184f6c874b60324ee107af53853687173d3434) Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com> 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.