SDK21 Link error: wasm-ld: undefined symbol: __wasilibc_dttoif(int)

[tyuuni]

Unable to compile this simple file.

#include <stdio.h>
#include <dirent.h>
int main() {
    printf("%d\n", DTTOIF(1));
}

Log:

./bin/clang++ --sysroot=./share/wasi-sysroot /tmp/a.cpp  -v
clang version 17.0.6
Target: wasm32-unknown-wasi
Thread model: posix
InstalledDir: /home/x/Applications/wasi-sdk-21.0/./bin
 "/home/x/Applications/wasi-sdk-21.0/bin/clang-17" -cc1 -triple wasm32-unknown-wasi -emit-obj -mrelax-all -dumpdir a- -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name a.cpp -mrelocation-model static -mframe-pointer=none -ffp-contract=on -fno-rounding-math -mconstructor-aliases -target-cpu generic -fvisibility=hidden -debugger-tuning=gdb -v -fcoverage-compilation-dir=/home/x/Applications/wasi-sdk-21.0 -resource-dir /home/x/Applications/wasi-sdk-21.0/lib/clang/17 -isysroot ./share/wasi-sysroot -internal-isystem ./share/wasi-sysroot/include/wasm32-wasi/c++/v1 -internal-isystem ./share/wasi-sysroot/include/c++/v1 -internal-isystem /home/x/Applications/wasi-sdk-21.0/lib/clang/17/include -internal-isystem ./share/wasi-sysroot/include/wasm32-wasi -internal-isystem ./share/wasi-sysroot/include -fdeprecated-macro -fdebug-compilation-dir=/home/x/Applications/wasi-sdk-21.0 -ferror-limit 19 -fgnuc-version=4.2.1 -fcxx-exceptions -fexceptions -fcolor-diagnostics -o /tmp/a-8d1f5f.o -x c++ /tmp/a.cpp
clang -cc1 version 17.0.6 based upon LLVM 17.0.6 default target wasm32-wasi
ignoring nonexistent directory "./share/wasi-sysroot/include/wasm32-wasi/c++/v1"
ignoring nonexistent directory "./share/wasi-sysroot/include/wasm32-wasi"
#include "..." search starts here:
#include <...> search starts here:
 ./share/wasi-sysroot/include/c++/v1
 /home/x/Applications/wasi-sdk-21.0/lib/clang/17/include
 ./share/wasi-sysroot/include
End of search list.
 "/home/x/Applications/wasi-sdk-21.0/./bin/wasm-ld" -m wasm32 -L./share/wasi-sysroot/lib/wasm32-wasi ./share/wasi-sysroot/lib/wasm32-wasi/crt1-command.o /tmp/a-8d1f5f.o -lc++ -lc++abi -lc /home/x/Applications/wasi-sdk-21.0/lib/clang/17/lib/wasi/libclang_rt.builtins-wasm32.a -o a.out
wasm-ld: error: /tmp/a-8d1f5f.o: undefined symbol: __wasilibc_dttoif(int)
clang++: error: linker command failed with exit code 1 (use -v to see invocation)

It seems there is a symbol, and wasm-ld has -lc

./bin/llvm-nm share/wasi-sysroot/lib/wasm32-wasi-threads/libc.a | grep dttoif
00000018 d .Lswitch.table.__wasilibc_dttoif
00000036 T __wasilibc_dttoif

[tyuuni]

works with manual linking:

./bin/clang -c /tmp/a.cpp -emit-llvm -o /tmp/a.o
./bin/wasm-ld -L ./share/wasi-sysroot/lib/wasm32-wasi-threads/ -lc /tmp/a.o -o /tmp/a.wasm