[llvm-dev] RFC: clang option to tolerate Windows-style #include paths?

[Tim Northover via llvm-dev]

Hi Simon,

This is probably more a cfe-dev question. I've added them to the
circulation here, apologies for the inevitable quotation mess.

Tim.

On Wed, 27 Jun 2018 at 11:27, Simon Tatham via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
> I've written a draft patch to allow clang to tolerate "Windows-isms" - backslash path separators and inconsistent case in filenames - in the pathnames appearing in #include directives, even when its host platform is not Windows.
>
> For example, something like #include "subdir\HEADER.H" would be initially reinterpreted as "subdir/HEADER.H", and then, if the file didn't exist, clang would check each component of the pathname for a case-insensitive match, so that if the file turned out to be called, say, "Subdir/Header.h" then it would still find it.
>
> The idea is to make life easier for people compiling Windows-specific code bases on (say) Linux, either because they're cross-compiling them with clang-cl, or because they're developing a port of the code base. If the owner of the code base won't take patches to make the #includes more portable, then it can be useful to have the fallback option of making clang tolerate the nonportable versions.
>
> It's nowhere near finished yet, but before I put more effort into polishing it up, I thought I'd check to see if this is a feature anyone else thinks would be useful, and also make sure I'm not going about it in totally the wrong way.
>
> The draft is at https://reviews.llvm.org/D48626 , if anyone's interested.
>
> Cheers,
> Simon
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