[Bug c/71876] longjmp is miscompiled with -ffreestanding

[bernd.edlinger at hotmail dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71876

--- Comment #1 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
I'm unsure, if ECF_LEAF is also unsafe:

/* The function does not lead to calls within current function unit.  */
#define ECF_LEAF                  (1 << 10)

I couldn't guarantee for that in a freestanding environmnent.