With freestanding build, libucontext.h conflicts with signal.h from glibc which includes sys/ucontext.h

[daandemeyer]

sys/ucontext.h will try to define REG_R8 which is already defined by libucontext/bits.h which blows up. Not sure if there's a way to accomodate this. Currently getting around it by overriding sys/ucontext.h on my end so we never try to include the glibc sys/ucontext.h when building with libucontext

[kaniini]

The fix here is for libucontext to not shadow the libc symbols. I will fix it this weekend.