Issue linking with --target=wasm32-wasip2-component

[KennanHunter]

I'm trying to use --target=wasm32-wasip2-component as partially described in #426 to compile an empty C file with wasi-sdk 24.0 to a Wasi component, but it seems that it is having troubles finding the libraries for linking.

This is all the c file is:

int main()
{
    return 0;
}

These are the results of running clang on it:

$ /opt/wasi-sdk/bin/clang ./component/main.c  -o app.wasm --target=wasm32-wasip2-component -v
clang version 18.1.2-wasi-sdk (https://github.com/llvm/llvm-project 26a1d6601d727a96f4301d0d8647b5a42760ae0c)
Target: wasm32-unknown-wasip2-component
Thread model: posix
InstalledDir: /opt/wasi-sdk/bin
 "/opt/wasi-sdk/bin/clang-18" -cc1 -triple wasm32-unknown-wasip2-component -emit-obj -mrelax-all -dumpdir app.wasm- -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name main.c -mrelocation-model static -mframe-pointer=none -ffp-contract=on -fno-rounding-math -mconstructor-aliases -target-cpu generic -fvisibility=hidden -debugger-tuning=gdb -fdebug-compilation-dir=/home/kennan/programming/workbench-c -v -fcoverage-compilation-dir=/home/kennan/programming/workbench-c -resource-dir /opt/wasi-sdk/lib/clang/18 -isysroot /opt/wasi-sdk/bin/../share/wasi-sysroot -internal-isystem /opt/wasi-sdk/lib/clang/18/include -internal-isystem /opt/wasi-sdk/bin/../share/wasi-sysroot/include/wasm32-wasip2-component -internal-isystem /opt/wasi-sdk/bin/../share/wasi-sysroot/include -ferror-limit 19 -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fcolor-diagnostics -o /tmp/main-c7559e.o -x c ./component/main.c
clang -cc1 version 18.1.2-wasi-sdk based upon LLVM 18.1.2-wasi-sdk default target wasm32-wasi
ignoring nonexistent directory "/opt/wasi-sdk/bin/../share/wasi-sysroot/include/wasm32-wasip2-component"
#include "..." search starts here:
#include <...> search starts here:
 /opt/wasi-sdk/lib/clang/18/include
 /opt/wasi-sdk/bin/../share/wasi-sysroot/include
End of search list.
 "/opt/wasi-sdk/bin/wasm-component-ld" -m wasm32 --wasm-ld-path /opt/wasi-sdk/bin/wasm-ld -L/opt/wasi-sdk/bin/../share/wasi-sysroot/lib/wasm32-wasip2-component crt1.o /tmp/main-c7559e.o -lc /opt/wasi-sdk/lib/clang/18/lib/wasip2/libclang_rt.builtins-wasm32.a -o app.wasm
wasm-ld: error: cannot open crt1.o: No such file or directory
wasm-ld: error: unable to find library -lc
error: failed to invoke LLD: exit status: 1
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Final goal is to compile a C file to component mode and import the Wasi clock and stdio dependencies, any help or direction would be greatly appreciated.

[alexcrichton]

Ah the target names of wasm32-wasip2-component and wasm32-wasip2-module are hypothetical names, not actual implemented names. This target is called wasm32-wasip2 (no suffix after that). This target emits a component at this time. Emitting a core wasm module, like the hypothetical wasm32-wasip2-module target, is not implemented at this time.

[KennanHunter]

Thank you! wasm32-wasip2 works perfectly