Richard Purdie 941a1341d7 bitbake.conf: Set and export TZ envvar to UTC
We just ran into an issue where tar failed to build on one server setup
but built everywhere else just fine.

It was running makeinfo to regenerate some docs files and makeinfo was too
old for the host it was running on. There was no dependency on makeinfo-native
as it was not meant to be regenerating the docs.

It was being regenerated as a date from a timestamp used in the docs
was different in Asian timezones than in the other timezones our builds
were being tested in.

I added an entry to https://wiki.yoctoproject.org/wiki/TipsAndTricks/
about how this was debugged.

As such, lets default to setting and exporting TZ to 'UTC' as was already
pioneered by the reproducibile builds work. This makes the builds
deterministic.

[YOCTO #12665]

(From OE-Core rev: 2a90ae7a3286724ff9e3615c4dbf56038f703810)

(From OE-Core rev: e31f31f81efe4b60938b724bece2a03c7c74a68d)

(From OE-Core rev: 2c72aa56e6065100582cb17f281c4c11521712e6)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
[Drop simple.bbclass changes]
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2018-05-03 09:53:49 +01:00
2016-03-26 08:06:58 +00:00
2014-01-02 12:58:54 +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 249 MiB