<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/84900>84900</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            flang-new needs to pass through -shared as a linker option link clang
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            flang:driver
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          jeffhammond
      </td>
    </tr>
</table>

<pre>
    `clang` has `-shared` as a linker option (https://clang.llvm.org/docs/ClangCommandLineReference.html#linker-options).

`flang-new` needs the same.

# Error

```
make[2]: Entering directory '/home/jehammond/MPI/mpich/build'
/bin/bash ./libtool  --tag=FC --mode=link /opt/llvm/latest/bin/flang-new -Isrc/binding/fortran/use_mpi  -O2 -version-info 0:0:0   -o lib/libmpifort.la -rpath /usr/local/lib lib/libmpi.la lib/libf77_mpi.la  lib/libf90_mpi.la
libtool: link: /opt/llvm/latest/bin/flang-new -shared  -fPIC  -Wl,--whole-archive lib/.libs/libf77_mpi.a lib/.libs/libf90_mpi.a -Wl,--no-whole-archive -Wl,-rpath -Wl,/home/jehammond/MPI/mpich/build/lib/.libs lib/.libs/libmpi.so -O2   -Wl,-soname -Wl,libmpifort.so.0 -o lib/.libs/libmpifort.so.0.0.0
flang-new: error: unknown argument: '-shared'
```

# Reproduce

```sh
git clone --recursive https://github.com/pmodels/mpich.git
cd mpich
./autogen.sh -yaksa-depth=1
mkdir build
cd build
../configure FC=/opt/llvm/latest/bin/flang-new CC=/opt/llvm/latest/bin/clang CXX=/opt/llvm/latest/bin/clang++ --with-device=ch4:ucx --enable-fortran=all
make -j`nproc`
```

# Version

I am using the latest, compiled today.
```
/opt/llvm/latest/bin/flang-new --version
flang-new version 18.0.0 (https://github.com/jeffhammond/llvm-project.git 868abf09619cb10ba710162483e5a66b0c1e4446)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /opt/llvm/latest/bin
```
</pre>
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