By default, the configure script is set to strip the binaries. It is then impossible to debug even when using nosplit / splitdebug. Reproducible: Always Steps to Reproduce:
Created attachment 210411 [details, diff] Patch to disable binary stripping This patch against the latest ebuild of qemu disables binary stripping. I can now display correct backtraces in gdb.
Unfortunately this issue slipped through the cracks. The ebuild in question is gone from the tree but newer versions have incorporated a fix.