wasi-sdk: macOS release binaries not able to create executables

Given these env variables:

export PATH="${PROJECT}/wasi-sdk-10.0/bin:$PATH"
export WASI_SYSROOT="${PROJECT}/wasi-sdk-10.0/share/wasi-sysroot"
clang --target=wasm32-wasi --sysroot="${WASI_SYSROOT}" ...

I then see configure: error: C compiler cannot create executables.

./configure --prefix=/…/wasm-build --with-sysroot=/…/wasi-sdk-10.0/share/wasi-sysroot --host=wasm32-wasi --disable-ssp --disable-shared checking build system type… i386-apple-darwin19.5.0 checking host system type… wasm32-unknown-wasi checking for a BSD-compatible install… /usr/bin/install -c checking whether build environment is sane… yes checking for wasm32-wasi-strip… llvm-strip checking for a thread-safe mkdir -p… build-aux/install-sh -c -d checking for gawk… gawk checking whether make sets $(MAKE)… yes checking whether make supports nested variables… yes checking whether UID ‘501’ is supported by ustar format… yes checking whether GID ‘20’ is supported by ustar format… yes checking how to create a ustar tar archive… gnutar checking whether make supports nested variables… (cached) yes checking whether to enable maintainer-specific portions of Makefiles… no checking whether make supports the include directive… yes (GNU style) checking for wasm32-wasi-gcc… clang checking whether the C compiler works… no configure: error: in /.../': configure: error: C compiler cannot create executables See config.log’ for more details

I am able to make a sysroot myself inside a checked out wasi-sdk repo with make install INSTALL_DIR="${PROJECT}/sysroot/" and I can use it to compile the same project (after I’ve downloaded and placed libclang_rt.builtins-wasm32-wasi-10.0.tar.gz into my llvm installation inside homebrew). However, I’d like to take advantage of the pre-compiled binaries + sysroots if at all possible because I’ve run into a problem too many times with one machine having a different version of llvm installed, etc.

One key difference I notice when using the version I compiled myself is it says it’s build system type is x86_64-apple-darwin19.5.0.

I am using macOS 10.15.5 with the latest homebrew and llvm 10.0.0_3.

About this issue

Original URL
State: closed
Created 4 years ago
Reactions: 2
Comments: 28 (17 by maintainers)

Commits related to this issue

Make the `__original_main` definition weak, fixing -flto. (#138) — committed to kildom/clang-wasi-port by sunfishcode 5 years ago
Roll wasi-libc to include snapshot1 (#84) This brings in the following changes: f645f49 Update signal macros after upgrade to snapshot1 (#144) 8b3266d github actions: pin checkout action to v1 (#... — committed to alexcrichton/wasi-sdk by sbc100 5 years ago

Most upvoted comments

wasm-ld: error: cannot open /usr/local/Cellar/llvm/11.0.0_1/lib/clang/11.0.0/lib/wasi/libclang_rt.builtins-wasm32.a: No such file or directory

You need to install that file (eventually, the Homebrew formula will install it along with llvm but it is not the case yet).

See https://github.com/jedisct1/libclang_rt.builtins-wasm32.a

jedisct1 on Jan 10, 2021

I am using a vendor-ed tar of the 1.0.18 release.

Breaking changes happened to wasi-sdk, wasi and to various runtimes since the release.

The stable branch doesn’t change the API and doesn’t introduce new features, but was introduced to backport performance improvements, and to keep up with external breaking changes, as well as add support for new compilers (such as Visual Studio 2019 that was also released since).

jedisct1 on Jun 3, 2020

Wait, are you trying to compile libsodium?

jedisct1 on Jun 3, 2020

The config.log file may tell you more about why executables cannot be created.

But macOS binaries available for download here are not notarized, so they cannot be used on Catalina if you download them using a web browser, or anything quarantining untrusted downloads.

A possible workaround is to download them using curl instead of a web browser.

But if you are using Homebrew, you really don’t need a second installation of LLVM, especially since LLVM packages in Homebrew are always up to date.

The wasi-sdk downloads include a precompiled wasi-sysroot. This, in addition to the precompiled builtins, is all you need if you already installed llvm using homebrew.

I started to work on a Homebrew package to add these dependencies. A package for the wasi sysroot is pretty straightforward, but for the builtins, I couldn’t figure out how to cleanly install them into another package’s (llvm) path.

jedisct1 on Jun 1, 2020