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PR https://github.com/ziglang/zig/pull/20679 ("std.c reorganization") switched feature-detection code to use "T != void" checks in place of "@hasDecl". However, the std.posix.system struct is empty, so compile-time feature detection against symbols in there (specifically `std.posix.system.ucontext_t` in this case), fail at compile time on freestanding targets. This PR adds a void ucontext_t into the std.posix.system default. This PR also adds pseudo-"freestanding" variation of the StackIterator "unwind" test. It is sort of hacky (its freestanding, but assumes it can invoke a Linux exit syscall), but it does detect this problem. Fixes #20710 |
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| compiler_rt.zig | ||
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| zig.h | ||