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Create HelloWorld examples that run on several of the QEMU architectures supported by the build system. This recipe can be used by anyone to understand how baremetal applications can be built using OpenEmbedded and how the wiring to set them up could be. This should also facilitate creating/extending the OE testing infrastructure to allow baremetal applications or RTOSs to be tested in the same way that Linux currently is. This can easily be extended to work on other MACHINES in the future. To run this example: $ source oe-init-buildenv $ bitbake-layers add-layer ../meta-skeleton # TCLIBC="baremetal" would work as well $ echo "TCLIBC = \"newlib\"" >> ./conf/local.conf $ echo "MACHINE = \"qemuarm64\"" >> ./conf/local.conf $ bitbake baremetal-helloworld $ runqemu runqemu - INFO - Running bitbake -e ... runqemu - INFO - Continuing with the following parameters: KERNEL: [tmp/deploy/images/qemuarm64/baremetal-helloworld-qemuarm64.bin] MACHINE: [qemuarm64] FSTYPE: [bin] ROOTFS: [tmp/deploy/images/qemuarm64/baremetal-helloworld-qemuarm64.bin] CONFFILE: [tmp/deploy/images/qemuarm64/baremetal-helloworld-qemuarm64.qemuboot.conf] Hello OpenEmbedded! (From OE-Core rev: b314e9a0923c8aa95a2f2c3f48d956206e9885a7) Signed-off-by: Alejandro Enedino Hernandez Samaniego <alejandro@enedino.org> 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.