Jose Quaresma fbce64d445 patch.bbclass: when the patch fails show more info on the fatal error
There are situations when the user have the 'patchdir' defined
as a parameter on SRC_URI. However he doesn't know that with this
the patch is applied relatively to the receipe source dir 'S'.

- When user have 'patchdir' defined check if this directory exist.
- If the patch fails show addition info to the user:
  - Import: show the striplevel
  - Resolver: show the expanded 'patchdir' to the user.

The next example is from opencv in meta-oe layer, here the
patch is applied on the target directory ${WORKDIR}/git/contrib.

S = "${WORKDIR}/git"
SRCREV_FORMAT = "opencv_contrib"
SRC_URI = "git://github.com/opencv/opencv.git;name=opencv \
           git://github.com/opencv/opencv_contrib.git;destsuffix=contrib;name=contrib \
           file://0001-sfm-link-with-Glog_LIBS.patch;patchdir=../contrib \
           "

* When the patch fail there are no message that indicates the real reason.
  patchdir=../no-found-on-file-system

ERROR: opencv-4.5.2-r0 do_patch: Command Error: 'quilt --quiltrc /build/tmp/work/core2-64-poky-linux/opencv/4.5.2-r0/recipe-sysroot-native/etc/quiltrc push' exited with 0  Output:
stdout: Applying patch 0001-sfm-link-with-Glog_LIBS.patch
can't find file to patch at input line 37
Perhaps you used the wrong -p or --strip option?

* The check of the patchdir will add a new fatal error
  when the user specifies a wrong path than don't exist.
  patchdir=../no-found-on-file-system

ERROR: opencv-4.5.2-r0 do_patch: Target directory '/build/tmp/work/core2-64-poky-linux/opencv/4.5.2-r0/git/../no-found-on-file-system' not found, patchdir '../no-found-on-file-system' is incorrect in patch file '0001-sfm-link-with-Glog_LIBS.patch'

* When we can't aplly the patch but the patchdir exist,
  show the expanded patchdir on fatal error.
  patchdir=../git

ERROR: opencv-4.5.2-r0 do_patch: Applying patch '0001-sfm-link-with-Glog_LIBS.patch' on target directory '/build/tmp/work/core2-64-poky-linux/opencv/4.5.2-r0/git/../git'
Command Error: 'quilt --quiltrc /build/tmp/work/core2-64-poky-linux/opencv/4.5.2-r0/recipe-sysroot-native/etc/quiltrc push' exited with 0  Output:
stdout: Applying patch 0001-sfm-link-with-Glog_LIBS.patch
can't find file to patch at input line 37
Perhaps you used the wrong -p or --strip option?

(From OE-Core rev: 0b57a6f07a2d69f809120f1bc1988738c35c095b)

Signed-off-by: Jose Quaresma <quaresma.jose@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
(cherry picked from commit c44bc7c0fb8b7c2e44dd93607a3bfd9733e1df80)
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2021-10-29 11:17:20 +01:00

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
No description provided
Readme 251 MiB