Index: clang/CMakeLists.txt
===================================================================
--- clang/CMakeLists.txt
+++ clang/CMakeLists.txt
@@ -747,6 +747,13 @@
     -DCMAKE_ASM_COMPILER=${LLVM_RUNTIME_OUTPUT_INTDIR}/${C_COMPILER}
     -DCMAKE_ASM_COMPILER_ID=Clang)
 
+  # If -tblgen is linked to libc++.so and it's not available in the system, the tool can't run
+  # since the runpath doesn't yet contain libc++.so, which can't be built without -tblgen
+  # See https://github.com/llvm/llvm-project/issues/53561
+  set(${CLANG_STAGE}_TABLEGEN
+    -DLLVM_TABLEGEN=${LLVM_RUNTIME_OUTPUT_INTDIR}/llvm-tblgen
+    -DCLANG_TABLEGEN=${LLVM_RUNTIME_OUTPUT_INTDIR}/clang-tblgen)
+
   # cmake requires CMAKE_LINKER to be specified if the compiler is MSVC-like,
   # otherwise it defaults the linker to be link.exe.
   if(BOOTSTRAP_LLVM_ENABLE_LLD)
@@ -757,9 +764,6 @@
 
   if(BOOTSTRAP_CMAKE_SYSTEM_NAME)
     set(${CLANG_STAGE}_CONFIG -DLLVM_CONFIG_PATH=${LLVM_RUNTIME_OUTPUT_INTDIR}/llvm-config)
-    set(${CLANG_STAGE}_TABLEGEN
-      -DLLVM_TABLEGEN=${LLVM_RUNTIME_OUTPUT_INTDIR}/llvm-tblgen
-      -DCLANG_TABLEGEN=${LLVM_RUNTIME_OUTPUT_INTDIR}/clang-tblgen)
     if(BOOTSTRAP_CMAKE_SYSTEM_NAME STREQUAL "Linux")
       if(BOOTSTRAP_LLVM_ENABLE_LLD)
         set(${CLANG_STAGE}_LINKER -DCMAKE_LINKER=${LLVM_RUNTIME_OUTPUT_INTDIR}/ld.lld)