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If a fetcher, e.g., git, is run when pseudo is active it will think it is running as root. If it in turn uses ssh (as git does), ssh too will think it is running as root. This will cause it to try to read root's ssh configuration from /root/.ssh which will fail. If ssh then needs to ask for credentials it will hang indefinitely as there is nowhere for it to ask the user for them (and even if there was it would not access the correct private keys). The solution to the above is to temporarily disable pseudo while executing any fetcher commands. There should be no reason for them to be executed under pseudo anyway so this should not be a problem. RP Ammendum: We finally did get more information about how to reproduce this problem, something needs to trigger bb.fetch2.get_srcrev() in a pseudo context, for example when AUTOREV is in use or the recipe doesn't have a defined SRCREV. That SRC_URI needs to be using protocol=ssh. This would trigger an ls-remote of the remote repo and if that happens under pseudo, the wrong ssh credentials may be attempted which can hang. [YOCTO #12464] (Bitbake rev: d0fb46eead1f23356d8c3bd53a85047521ef29a7) Signed-off-by: Peter Kjellerstedt <peter.kjellerstedt@axis.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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.