<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/64893>64893</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            flang-new: error: unknown argument:
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
      </td>
    </tr>

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

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

<pre>
    Here is how I build and install llvm and flang:
```
git clone https://github.com/llvm/llvm-project.git
rm -rf build
mkdir build
rm -rf install
mkdir install
ROOTDIR=`pwd`
INSTALLDIR=$ROOTDIR/install
C_COMPILER_PATH="/home/edison/llvm/bin/clang"
CXX_COMPILER_PATH="/home/edison/llvm/bin/clang++"

cd build

cmake \
  -G Ninja \
  -DCMAKE_BUILD_TYPE=Release \
 -DCMAKE_INSTALL_PREFIX=$INSTALLDIR \
  -DCMAKE_CXX_STANDARD=17 \
 -DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
 -DCMAKE_C_COMPILER=$C_COMPILER_PATH \
 -DCMAKE_CXX_COMPILER=$CXX_COMPILER_PATH \
 -DCMAKE_CXX_LINK_FLAGS="-Wl,-rpath,$LD_LIBRARY_PATH" \
 -DFLANG_ENABLE_WERROR=ON \
  -DLLVM_ENABLE_ASSERTIONS=ON \
 -DLLVM_TARGETS_TO_BUILD=host \
  -DLLVM_LIT_ARGS=-v \
 -DLLVM_ENABLE_PROJECTS="clang;mlir;flang;openmp" \
 -DLLVM_ENABLE_RUNTIMES="compiler-rt" \
 ../llvm-project/llvm

ninja
ninja intall
mv ~/llvm ~/llvm16
mv install/ ~/llvm

```

and than buld CPU2017 521.wfr_r:
```
. ./shrc
runcpu -c llvm -a setup 521
```
...
flang-new: error: unknown argument: '-m64'
flang-new: error: unknown argument: '-mtune=core-avx2'
flang-new: error: unknown argument: '-mfma'
flang-new: error: unknown argument: '-mavx'
flang-new: error: unknown argument: '-mavx2'
flang-new: error: unknown argument: '-fomit-frame-pointer'
flang-new: error: unknown argument: '-fno-strict-aliasing'
flang-new: error: unknown argument: '-fno-finite-math-only'
flang-new: error: unknown argument: '-Mbyteswapio'
...
</pre>
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