Yocto(Hardknott)添加Realsense Layer编译失败问题求助

1. Git拉取超时错误 #

ERROR: librealsense2-2.44.0-r0 do_fetch: Fetcher failure: Fetch command export PSEUDO_DISABLED=1; export DBUS_SESSION_BUS_ADDRESS="unix:path=/run/user/1000/bus"; export PATH="/home/ubuntu/yocto_hardknott_realsense/sources/poky/scripts:/home/ubuntu/yocto_hardknott_realsense/build-xwayland-imx8mpsolidrun/tmp/work/cortexa53-crypto-poky-linux/librealsense2/2.44.0-r0/recipe-sysroot-native/usr/bin/aarch64-poky-linux:/home/ubuntu/yocto_hardknott_realsense/build-xwayland-imx8mpsolidrun/tmp/work/cortexa53-crypto-poky-linux/librealsense2/2.44.0-r0/recipe-sysroot/usr/bin/crossscripts:/home/ubuntu/yocto_hardknott_realsense/build-xwayland-imx8mpsolidrun/tmp/work/cortexa53-crypto-poky-linux/librealsense2/2.44.0-r0/recipe-sysroot-native/usr/sbin:/home/ubuntu/yocto_hardknott_realsense/build-xwayland-imx8mpsolidrun/tmp/work/cortexa53-crypto-poky-linux/librealsense2/2.44.0-r0/recipe-sysroot-native/usr/bin:/home/ubuntu/yocto_hardknott_realsense/build-xwayland-imx8mpsolidrun/tmp/work/cortexa53-crypto-poky-linux/librealsense2/2.44.0-r0/recipe-sysroot-native/sbin:/home/ubuntu/yocto_hardknott_realsense/build-xwayland-imx8mpsolidrun/tmp/work/cortexa53-crypto-poky-linux/librealsense2/2.44.0-r0/recipe-sysroot-native/bin:/home/ubuntu/yocto_hardknott_realsense/sources/poky/bitbake/bin:/home/ubuntu/yocto_hardknott_realsense/build-xwayland-imx8mpsolidrun/tmp/hosttools"; export HOME="/home/ubuntu"; git -c core.fsyncobjectfiles=0 ls-remote git://github.com/IntelRealSense/librealsense.git failed with exit code 128, output:
fatal: unable to connect to github.com:
github.com[0: 140.82.121.3]: errno=Connection timed out

原因与解决 #

这个错误是git://协议的网络连接超时导致的，换成https://协议是正确的修复方向。需要额外确认SRC_URI[sha256sum]的值与librealsense v2.44.0版本源码的哈希完全匹配，避免拉取到不完整或错误的代码包。

2. 补丁无法应用错误 #

ERROR: librealsense2-2.44.0-r0 do_patch: Command Error: 'quilt --quiltrc /home/ubuntu/yocto_hardknott_realsense/build-xwayland-imx8mpsolidrun/tmp/work/cortexa53-crypto-poky-linux/librealsense2/2.44.0-r0/recipe-sysroot-native/etc/quiltrc push' exited with 0 Output:
stdout: Applying patch Remove-R200-fix-from-udev-rules.patch
(Stripping trailing CRs from patch; use --binary to disable.)
can't find file to patch at input line 15
Perhaps you used the wrong -p or --strip option?
The text leading up to this was: #

From e3151a52558c6882003d69602c6ebc86ff47c35a Mon Sep 17 00:00:00 2001
From: Scott Ware scott.r.ware@intel.com
Date: Mon, 8 Jun 2020 10:58:12 +0100
Subject: [PATCH 2/3] Remove R200 fix from udev rules
Signed-off-by: Scott Ware scott.r.ware@intel.com
---
config/99-realsense-libusb.rules
1 file changed, 1 insertion(+), 1 deletion(-)

|
|diff --git a/config/99-realsense-libusb.rules b/config/99-realsense-libusb.rules
|index 0144322..e3eb567 100644
|--- a/config/99-realsense-libusb.rules
|+++ b/config/99-realsense-libusb.rules #

No file to patch. Skipping patch.
1 out of 1 hunk ignored
Patch Remove-R200-fix-from-udev-rules.patch does not apply (enforce with -f)

stderr:

原因与解决 #

这个错误的核心是补丁与当前拉取的v2.44.0版本源码不兼容，可能存在以下几种情况：

• 文件路径变更：v2.44.0版本的源码中，config/99-realsense-libusb.rules文件可能被移动到其他目录，或文件名发生了变化。
• 补丁已合并：该补丁对应的修改已经被官方合并到v2.44.0版本中，源码里已无需要修改的内容。
• 补丁版本不匹配：你使用的Realsense Layer中的补丁是为旧版本librealsense编写的，不适用于v2.44.0。

对应的解决方法：

• 检查源码结构：在tmp/work/cortexa53-crypto-poky-linux/librealsense2/2.44.0-r0/git/目录下，确认是否存在config/99-realsense-libusb.rules文件。如果路径不同，修改补丁中的路径，或在SRC_URI的补丁项中添加striplevel参数调整路径层级。
• 移除无效补丁：如果该补丁的修改已经包含在v2.44.0源码中，直接在recipe的SRC_URI里删除对应的补丁引用。
• 匹配Layer版本：查找与Yocto Hardknott和librealsense v2.44.0兼容的Realsense Layer版本，确保补丁与源码版本匹配。

内容的提问来源于stack exchange，提问作者Juanma