[llvm-dev] clang-9 and wasm32-unknown-unknown (original) (raw)

Thomas Lively via llvm-dev llvm-dev at lists.llvm.org
Tue Feb 18 10:14:19 PST 2020

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

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