<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/59782>59782</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            compiler-rt in the stage 2 and stage 3 build can't generate sanitizer libraries as stage 1 build
        </td>
    </tr>

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

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

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

<pre>
    Hello,
 The build script I'm using is build-llvm.sh which is attached as [build-llvm.sh.txt](https://github.com/llvm/llvm-project/files/10330004/build-llvm.sh.txt) . Inside that script, it is very clear can see how cmake configuration has been done. I can sucessfully to do a 3 stages build for clang linked with libc++ without gcc. But only meet one issue is that during stage 2 and stage 3 build, it can't generate sanitizer libraries like stage 1 which such like libclang_rt.asan.a and some other libclang_rt.*san*.a in relative path lib/clang/15.0.6/lib/x86_64-unknown-linux-gnu.

 Below are the build trace for stage 1 to 3.
[build-stage1.log](https://github.com/llvm/llvm-project/files/10330000/build-stage1.log)
[build-stage2.log](https://github.com/llvm/llvm-project/files/10330001/build-stage2.log)
[build-stage3.log](https://github.com/llvm/llvm-project/files/10330002/build-stage3.log)

 According to build-stage1.log, I have found the result of "Compiler-RT supported architectures" is x86_64.

 But for build-stage2.log, also as build-stage3.log, the result of the result of "Compiler-RT supported architectures" is empty. I'm still searching why it is empty. I think this will cause sanitizer libraries in compiler-rt will not included to build.
 
   I have also found If I move 'compiler-rt' from the list of LLVM_ENABLE_RUNTIMES to LLVM_ENABLE_PROJECTS. the compiler-rt in stage 2 and stage 3 build can sucessfully to generate libclang_rt.asan.a and other libclang_rt.*san*.a in relative path lib/clang/15.0.6/lib/x86_64-unknown-linux-gnu as stage 1 build.

The compile behaviour is quite strange. What my purpose is stage 2 and stage 3 can do like stage 1 to generate all the sanitizer libraries. Any thing doing wrong for my build-llvm.sh?
</pre>
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