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Ioan-Adrian Ratiu 78a406431a rootfs: always update the opkg index
The previous logic assumed that if $BUILD_IMAGES_FROM_FEEDS=1 then a
complete set of ipk feeds from which to build the image is already
present under $IPK_FEED_URIS at do_rootfs runtime.

$IPK_FEED_URIS usually contains "file://${DEPLOY_DIR_IPK}" which
renders the above assumption bad because some recipes in the current
build can contain code like do_install[nostamp] = "1" which will cause
rebuilds bumping $PR and invalidating the index.

Even when the index is manually re-created before an image build
("bitbake package-index"), the nostamp will cause failures because the
dependency gets rebuilt before do_rootfs in the "bitbake <image>" call.

So make the opkg rootfs index logic the same as for rpm/deb, to always
update the index in $DEPLOY_DIR_IPK to fix the above nostamp failure.

Feeds outside $DEPLOY_DIR_IPK added to $IPK_FEED_URIS continue to work
as usual, for eg. by using a http:// URI.

(From OE-Core rev: bce90f48d1cc136fdfdf98b3830f5d99e381271b)

(From OE-Core rev: 6e03d1d56587d93b9a9ec936ceb69350234c627a)

Signed-off-by: Ioan-Adrian Ratiu <adrian.ratiu@ni.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>
2018-10-18 11:08:53 +01:00
2018-10-18 11:08:53 +01:00
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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