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94eb5724b1
To quote Zhuang <qiuguang.zqg@alibaba-inc.com>: """ A few days ago, I tried to compile a gcc plugin with the toolchain from poky sdk. It failed with errors about missing header files such as backend.h etc. After investigation, I found that the problem was brought by a gcc patch: 0012-gcc-Fix-argument-list-too-long-error.patch (which is considered derived from the original patch) - headers=`echo $(PLUGIN_HEADERS) $$(cd $(srcdir); echo *.h *.def) | tr ' ' '\012' | sort -u`; \ + headers="$(sort $(PLUGIN_HEADERS) $$(cd $(srcdir); echo *.h *.def))"; \ It changes the commands of install-plugin, making the sorting taken effect before the shell globs. Thus results in the header files under gcc $(srcdir) being not installed. By checking log.do_install, we can find that the `headers=' statement to run is incorrect and will not work as expected: headers="$(cd *.def) *.h ../../../../../../../work-shared/gcc-10.1.0-r0/gcc-10.1.0/gcc/../include/ansidecl.h ... As the patch says, "The PLUGIN_HEADERS is too long before sort, so the "echo" can't handle it, ..." my suggestion is that we can simply take care of PLUGIN_HEADERS using the original proposed sort. """ This fixes the gcc patch as proposed as it does appear its been broken over time. (From OE-Core rev: dce28d8ac7fbae487cb6674b91fe2b574036b26d) 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.