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The find_program command will fail if it is used on a tool that is listed in ASSUME_PROVIDED. This is because these tools are in the hosttools directory which is not listed in CMAKE_FIND_ROOT_PATH so cmake will not find them. Adding the directory HOSTTOOLS_DIR to the CMAKE_FIND_ROOT_PATH variable fixes the initial issue of needing to search for tools in ASSUME_PROVIDED. Note that this change alone does not fix the issue because find_program will by default only look into the subdirectories bin and usr/bin under the paths in CMAKE_FIND_ROOT_PATH to find the programs and the hosttools directory has instead the symlinks directly present without these subdirectories. Set CMAKE_PROGRAM_PATH to by default include the root directory so find_program can search the hosttools directory without needing the prefix directories. (From OE-Core rev: 7847f431cd8db59fce8c9401a603c4b0678ee16d) Signed-off-by: Ross Burton <ross.burton@intel.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.