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Dan Callaghan
6efa038c01
"Mini debuginfo" is a special section in ELF executables containing minimal compressed debuginfo for non-exported symbols: https://sourceware.org/gdb/onlinedocs/gdb/MiniDebugInfo.html It lets debugging tools produce better stack traces, including local function names, without incurring the space overhead of full debuginfo. The feature was originally developed for Fedora: https://fedoraproject.org/wiki/Features/MiniDebugInfo but nowadays it is widely supported in the ecosystem, including in gdb and elfutils (and therefore also in tools which use elfutils, such as systemd-coredump). This patch adds an optional extra step in package.bbclass to inject minidebuginfo while stripping and splitting out debuginfo. It can be enabled by setting PACKAGE_MINIDEBUGINFO=1. In my testing, this increases the size of resulting binaries by roughly 5%. The code for producing and re-injecting the minidebuginfo is my own Python implementation but corresponds directly to the shell implementation that RPM uses for doing the same: https://github.com/rpm-software-management/rpm/blob/rpm-4.15.1-release/scripts/find-debuginfo.sh#L261 (From OE-Core rev: 4df992ce50c2d12e356b6d9fe7b23a6320c8b4df) Signed-off-by: Dan Callaghan <dan.callaghan@opengear.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.