<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/57996>57996</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [clang 15] Impossible to disable the new default PIE mode on Linux with -fno-pic -fno-PIC -fno-pie -fno-PIE
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

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

    <tr>
      <th>Reporter</th>
      <td>
          Romain-Geissler-1A
      </td>
    </tr>
</table>

<pre>
    Hi,

It seems clang 15 enabled `CLANG_DEFAULT_PIE_ON_LINUX=ON` by default, and I have no problem with that. However it seems it's much more than a default, it's also not reversible at all once clang has been compiled.

Just try to compile this snippet:

```
#include <iostream>

int main()
{
    std::cout << "some text" << std::endl;
}
```

with the following options: `-fno-pic -fno-PIC -fno-pie -fno-PIE -fuse-ld=lld` and you will end up with errors like:

```
ld.lld: error: relocation R_X86_64_64 cannot be used against local symbol; recompile with -fPIC
>>> defined in /tmp/example-a1ec20.o
>>> referenced by example.cpp:5
>>>               /tmp/example-a1ec20.o:(main)

ld.lld: error: relocation R_X86_64_64 cannot be used against local symbol; recompile with -fPIC
>>> defined in /tmp/example-a1ec20.o
>>> referenced by iostream:74 (/opt/compiler-explorer/gcc-12.2.0/lib/gcc/x86_64-linux-gnu/12.2.0/../../../../include/c++/12.2.0/iostream:74)
>>>               /tmp/example-a1ec20.o:(__cxx_global_var_init)

ld.lld: error: relocation R_X86_64_64 cannot be used against local symbol; recompile with -fPIC
>>> defined in /tmp/example-a1ec20.o
>>> referenced by example.cpp:0
>>>               /tmp/example-a1ec20.o:(__cxx_global_var_init)

ld.lld: error: cannot preempt symbol: __dso_handle
>>> defined in /opt/compiler-explorer/gcc-12.2.0/lib/gcc/x86_64-linux-gnu/12.2.0/crtbeginS.o
>>> referenced by example.cpp:0
>>>               /tmp/example-a1ec20.o:(__cxx_global_var_init)
clang-15: error: linker command failed with exit code 1 (use -v to see invocation)
ASM generation compiler returned: 1
ld.lld: error: relocation R_X86_64_64 cannot be used against local symbol; recompile with -fPIC
>>> defined in /tmp/example-653928.o
>>> referenced by example.cpp:5
>>>               /tmp/example-653928.o:(main)

ld.lld: error: relocation R_X86_64_64 cannot be used against local symbol; recompile with -fPIC
>>> defined in /tmp/example-653928.o
>>> referenced by iostream:74 (/opt/compiler-explorer/gcc-12.2.0/lib/gcc/x86_64-linux-gnu/12.2.0/../../../../include/c++/12.2.0/iostream:74)
>>>               /tmp/example-653928.o:(__cxx_global_var_init)

ld.lld: error: relocation R_X86_64_64 cannot be used against local symbol; recompile with -fPIC
>>> defined in /tmp/example-653928.o
>>> referenced by example.cpp:0
>>>               /tmp/example-653928.o:(__cxx_global_var_init)

ld.lld: error: cannot preempt symbol: __dso_handle
>>> defined in /opt/compiler-explorer/gcc-12.2.0/lib/gcc/x86_64-linux-gnu/12.2.0/crtbeginS.o
>>> referenced by example.cpp:0
>>>               /tmp/example-653928.o:(__cxx_global_var_init)
clang-15: error: linker command failed with exit code 1 (use -v to see invocation)
Execution build compiler returned: 1
```

Note: the above example was taken from this godbolt example: https://godbolt.org/z/aT6xGah4e

I don't understand why this default PIE mode is not something you can control from the commande line.

Cheers,
Romain
</pre>
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