[llvm-dev] clang-9 and wasm32-unknown-unknown

[Thomas Lively via llvm-dev]

My understanding is that wasm32-unknown-unknown does not make assumptions
about that layout of the host system and needs to be explicitly configured
with a sysroot (with -isysroot). Both wasi-sdk and Emscripten ship with
their own sysroots and pass this flag for you.

On Mon, Feb 17, 2020 at 6:15 PM Elichai Turkel via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Hi,
> I'm not sure if this is a bug or not, but would appreciate
> understanding what's going on and what's the right way to fix it.
> Running `clang --target=wasm32-unknown-unknown test.c` on a sample C
> file with `include <string.h>` returns: "fatal error: 'string.h' file
> not found". but without the target it works just fine.
>
> With some help of @jdoerfert in IRC I found this difference:
> `clang test.c -v` returns:
> ```
> #include <...> search starts here:
>  /usr/local/include
>  /usr/local/lib/clang/9.0.1/include
>  /usr/include
> End of search list.
> ```
> But `clang --target=wasm32-unknown-unknown test.c -v` returns:
> ```
> #include <...> search starts here:
>  /usr/local/lib/clang/9.0.1/include
> End of search list.
> ```
>
> Why are the other include paths missing? what's the right way to make this
> work?
> FWIW I'm pretty sure it worked to me in the past with older clang versions.
>
> Thanks.
> Elichai.
> --
> PGP: 5607C93B5F86650C
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20200218/05c716a2/attachment.html>