Fails due to:

[   45s] /usr/include/asm/sigcontext.h:40:8: error: redefinition of 'struct
_fpx_sw_bytes'

There's some broken configure:

Bad configure:

 checking whether a fault handler according to Hurd works... no
 checking ucontext.h usability... yes
 checking ucontext.h presence... yes
 checking for ucontext.h... yes
vs.

 checking whether a fault handler according to Hurd works... no
 checking for the fault handler specifics... fault-linux-x86_64-old.h
 checking if the system supports catching SIGSEGV... no
 checking for stack direction... grows down