[clang] [clang-repl] Extend the C support. (PR #89804)

[Vassil Vassilev via cfe-commits]

vgvassilev wrote:

> fwiw if you have access to a mac, I don't think it's hard to build lldb+clang? I have swig, cmake, and ninja installed on my mac via homebrew.
> 
> ```
> lldb/scripts/macos-setup-codesign.sh
> 
> mkdir build
> cd build
>  cmake ../llvm -G Ninja -DLLDB_ENABLE_SWIFT_SUPPORT=0 -DPython3_EXECUTABLE=/usr/bin/python3 -DCMAKE_BUILD_TYPE=Debug -DLLVM_ENABLE_ASSERTIONS=1 -DLLVM_ENABLE_PROJECTS='llvm;lldb;clang' '-DLLVM_ENABLE_RUNTIMES=libcxx;libcxxabi;libunwind' -DLLDB_ENABLE_PYTHON=1 -DLLDB_ENABLE_LUA=0
> 
> ninja lldb
> bin/lldb-dotest -p TestImportBuiltinFileID.py
> ```

Does not seem to be reproducing it for me:

```
builds/llvm-project$ bin/lldb-dotest -p TestImportBuiltinFileID.py
/Applications/Xcode.app/Contents/Developer/usr/bin/python3 /Users/vvassilev/workspace/sources/llvm-project/lldb/test/API/dotest.py --arch x86_64 --build-dir /Users/vvassilev/workspace/builds/llvm-project/lldb-test-build.noindex --executable /Users/vvassilev/workspace/builds/llvm-project/./bin/lldb --compiler /Users/vvassilev/workspace/builds/llvm-project/./bin/clang --dsymutil /Users/vvassilev/workspace/builds/llvm-project/./bin/dsymutil --lldb-libs-dir /Users/vvassilev/workspace/builds/llvm-project/./lib --llvm-tools-dir /Users/vvassilev/workspace/builds/llvm-project/./bin --libcxx-include-dir /Users/vvassilev/workspace/builds/llvm-project/include/c++/v1 --libcxx-library-dir /Users/vvassilev/workspace/builds/llvm-project/lib --lldb-obj-root /Users/vvassilev/workspace/builds/llvm-project/tools/lldb -p TestImportBuiltinFileID.py
lldb version 19.0.0git (git at github.com:llvm/llvm-project.git revision 253c28fa829cee0104c2fc59ed1a958980b5138c)
  clang revision 253c28fa829cee0104c2fc59ed1a958980b5138c
  llvm revision 253c28fa829cee0104c2fc59ed1a958980b5138c
Skipping the following test categories: ['libstdcxx', 'dwo', 'llgs', 'fork']
PASS: LLDB (/Users/vvassilev/workspace/builds/llvm-project/bin/clang-x86_64) :: test_import_builtin_fileid_gmodules (TestImportBuiltinFileID.TestImportBuiltinFileID)
----------------------------------------------------------------------
Ran 1 test in 52.311s

OK
```

https://github.com/llvm/llvm-project/pull/89804