https://bugs.openldap.org/show_bug.cgi?id=9916
--- Comment #11 from glaubitz@physik.fu-berlin.de --- (In reply to Howard Chu from comment #9)
Breakpoint 1 at 0x155c0: file main.c, line 218. (gdb) r Starting program: /tmp/openldap/servers/slapd/slapd
Program received signal SIGILL, Illegal instruction. 0xfff8000100e43360 in ?? () (gdb)
You can just hit 'c' here which worked for me.
I thought this was just a runtime check for architecture support for certain instructions. OpenSSL has something similar.