Richard Purdie 25e3e95e04 u-boot-tools: Fix reproducibility issue
If you build on a system with git < 2.14 from scratch (e.g. debian9), the
tree will be marked as "dirty" and the version will include "-dirty", leading
to a reproducibility problem. The issue is the inode count for Licnses/README
changing due to do_populate_lic hardlinking a copy of the file. We avoid
this by ensuring the index is updated with a "git diff" before the
u-boot machinery tries to determine the version.

build$ ../git/scripts/setlocalversion ../git
""
build$ ln ../git/
build$ ln ../git/README ../foo
build$ ../git/scripts/setlocalversion ../git
""-dirty

(i.e. creating a hardlink dirties the index)

(From OE-Core rev: d39587d65bd57148c2c76b23e7a6ec78de855909)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit a4de915af9e2c4d365527ad09286483b2ee904fc)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2021-01-01 11:55:34 +00:00
2020-12-18 14:20:19 +00:00

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.
Description
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Readme 251 MiB