[Issue 24413] ImportC: undefined identifier `__builtin_unreachable`

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24413

Elias Batek (0xEAB) <desisma at heidel.beer> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |desisma at heidel.beer

--- Comment #1 from Elias Batek (0xEAB) <desisma at heidel.beer> ---
Found something to reproduce it.

While trying to compile
<https://github.com/mity/md4c/blob/481fbfbdf72daab2912380d62bb5f2187d438408/src/md4c.c>,
I ended up with this wall of errors:

md4c.c(1084,43): Error: undefined identifier `__builtin_unreachable`
md4c.c(1235,43): Error: undefined identifier `__builtin_unreachable`
md4c.c(1308,43): Error: undefined identifier `__builtin_unreachable`
md4c.c(1383,34): Error: undefined identifier `__builtin_unreachable`
md4c.c(2293,72): Error: undefined identifier `__builtin_unreachable`
md4c.c(2294,45): Error: undefined identifier `__builtin_unreachable`
md4c.c(2357,43): Error: undefined identifier `__builtin_unreachable`
md4c.c(2564,23): Error: undefined identifier `__builtin_unreachable`
md4c.c(2574,23): Error: undefined identifier `__builtin_unreachable`
md4c.c(2594,23): Error: undefined identifier `__builtin_unreachable`
md4c.c(2663,33): Error: undefined identifier `__builtin_unreachable`
md4c.c(2666,56): Error: undefined identifier `__builtin_unreachable`
md4c.c(2675,33): Error: undefined identifier `__builtin_unreachable`
md4c.c(2903,43): Error: undefined identifier `__builtin_unreachable`
md4c.c(2931,43): Error: undefined identifier `__builtin_unreachable`
md4c.c(2942,43): Error: undefined identifier `__builtin_unreachable`
md4c.c(3613,62): Error: undefined identifier `__builtin_unreachable`
md4c.c(3617,62): Error: undefined identifier `__builtin_unreachable`
md4c.c(3692,40): Error: undefined identifier `__builtin_unreachable`
md4c.c(3725,43): Error: undefined identifier `__builtin_unreachable`

(Importing the header only appears to be working fine.)

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