<div dir="ltr">I apologize if this seems rude, but my initial reaction is that you should not rely on invariants that do not hold true in practice. :) In any case, you are already clearly aware that this assumption creates portability problems, and I don't seek to assign blame.<div><br></div><div>I don't believe we have such an option, and I don't think we would be open to adding one, since generally we try to discourage the proliferation of alternative ABI variants.</div><div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Dec 12, 2019 at 9:14 AM Mikhail Ramalho via cfe-dev <<a href="mailto:cfe-dev@lists.llvm.org">cfe-dev@lists.llvm.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Hi all,<div><br></div><div>Is there any way to force __builtin_va_list to always be a char*, regardless of the architecture?</div><div><br></div><div>We are using clang as a frontend in our project and our analysis relies on the fact that __builtin_va_list is a char* on 64 bits architecture as well, but we keep getting:</div><div><br></div><div>|-TypedefDecl 0x4148c78 <<invalid sloc>> <invalid sloc> implicit referenced __builtin_va_list 'struct __va_list_tag [1]'<br>| `-ConstantArrayType 0x4148c20 'struct __va_list_tag [1]' 1 <br>| `-RecordType 0x4148aa0 'struct __va_list_tag'<br>| `-Record 0x4148a10 '__va_list_tag'<br></div><div><br></div><div>I've tried several different combinations of defines but to no avail.</div><div><br></div><div>In case it is not possible, we could submit a patch to add an option to force that on clang. A bit of an overkill given that we would be the only users (I think).</div><div><br></div><div>Best,</div><div><div><br></div>-- <br><div dir="ltr"><div dir="ltr"><div><br></div><div>Mikhail Ramalho.</div></div></div></div></div>
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