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Douglas Royds beaffe5b70 icecc: Don't generate recipe-sysroot symlinks at recipe-parsing time
The python function icecc_path() was being invoked inline by set_icecc_env(),
meaning that it was being invoked at recipe-parsing time.
As a side-effect, icecc_path() was creating the recipe-sysroot directory and
symlinking icecc into it. Because this was done at parsing time (rather than
configure time), we were generating otherwise-empty WORKDIRs for *all* parsed
recipes, and for all virtual classes (-native, -nativesdk).
In my build, this generated more than 800 of these otherwise-empty WORKDIRs.

I have simplified icecc_path() to return only the intended path to the icecc
symlinks in the recipe-sysroot, with no side-effect.
We then create the directory and the icecc symlinks at configure time.

Because get_cross_kernel_cc() is still invoked at parse-time,
it needs a guard-clause for the non-kernel case.
We are now finding the host icecc at do_configure time,
so icecc needs to be in the HOSTTOOLS. I have made this non-fatal,
so that we can still inherit icecc without icecc installed.

(From OE-Core rev: d2fcaeb153fdc3f8d7143ea823139f1537055ff1)

(From OE-Core rev: 46db052def5c4fa0de7943262092582c8d897117)

Signed-off-by: Douglas Royds <douglas.royds@taitradio.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2019-02-06 16:38:30 +00:00
2019-01-08 22:49:30 +00:00
2018-02-24 10:31:45 +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.
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