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When DEBUG_BUILD = "1" added in local.conf, there comes below build error when "bitbake gcc-sanitizers": | ./../../../../../../../../work-shared/gcc-8.3.0-r0/gcc-8.3.0/libsanitizer/libbacktrace/../../libbacktrace/elf.c: In function 'elf_is_symlink': | ../../../../../../../../../work-shared/gcc-8.3.0-r0/gcc-8.3.0/libsanitizer/libbacktrace/../../libbacktrace/elf.c:772:21: error: 'st.st_mode' may be used uninitialized in this function [-Werror=maybe-uninitialized] | return S_ISLNK (st.st_mode); After commit[16643b0322 bitbake.conf: Use -Og in DEBUG_OPTIMIZATION] introduced, "-Og" added to compiler when debug build enabled. Per https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00315.html, the gcc upstream thinks the warning is a false positive and suggests to use -O2 rather than -Og or -O1 when compiling that file, so pass -Wno-error to compiler when -Og is used to silence the error. (From OE-Core rev: d8d657f082d4a86f93ce810e5d99eb5c93333d8a) Signed-off-by: Mingli Yu <Mingli.Yu@windriver.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.