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Fix c.inc

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c.inc (as far as I can tell erroneously) would define `_Atomic(t)` to be
`vloatile t *` instead of just `volatile t` if `__STDC_VERSION__` didn't
say at least C11. This branch gets taken if we’re compiling C++; however
in C++11 `_Atomic` is a library define, not a language keyword. Moreover
it is defined in `<stdatomic.h>`, which is a morass that ultimately sets
up everything to refer back to `std::atomic<T>`.

The gory details are in `third_party/libcxx/__atomic/cxx_atomic_impl.h`.
For our purposes it seems to be enough to just have our data be volatile
and use the libc/intrin/atomic.h functions on them.
This commit is contained in:
Steven Dee (Jōshin) 2024-06-17 20:17:48 -07:00
parent 8e3b361aeb
commit b99e111f42
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libc/integral/c.inc
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@ -74,7 +74,7 @@
#endif
#if __STDC_VERSION__ + 0 < 201112
#define _Atomic(t) volatile t *
#define _Atomic(t) volatile t
#endif
#ifdef __llvm__