================ @@ -7,6 +7,11 @@ *===-----------------------------------------------------------------------=== */ -#ifndef offsetof +/* + * When -fbuiltin-headers-in-system-modules is set this is a non-modular header + * and needs to behave as if it was textual. + */ +#if !defined(offsetof) || \ + (__has_feature(modules) && !__building_module(_Builtin_stddef)) ---------------- ian-twilightcoder wrote:
Oh I see what you mean. When the Darwin module builds, it will build <stddef.h> which will include <__stddef_offsetof.h>. It will bypass the header guard and (re)define `offsetof`. The Darwin module will also build <sys/_types/_offsetof.h>, so which one gets used is undefined, but the Darwin module will be the single definer of `offsetof`. It's a little weird, but this actually matches the LLVM 17 behavior. https://github.com/llvm/llvm-project/pull/84127 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
