================
@@ -1029,6 +1038,11 @@ macro(add_llvm_executable name)
     add_llvm_symbol_exports( ${name} ${LLVM_EXPORTED_SYMBOL_FILE} )
   endif(LLVM_EXPORTED_SYMBOL_FILE)
 
+  if (NOT LLVM_ENABLE_EXPORTED_SYMBOLS_IN_EXECUTABLES AND 
LLVM_LINKER_SUPPORTS_NO_EXPORTED_SYMBOLS)
----------------
delcypher wrote:

Currently we silently ignore `LLVM_ENABLE_EXPORTED_SYMBOLS_IN_EXECUTABLES` if 
the linker doesn't support the flag. It would probably better to produce a 
fatal error to avoid an invalid configuration being used.

```cmake
if (NOT LLVM_ENABLE_EXPORTED_SYMBOLS_IN_EXECUTABLES)
  if (LLVM_LINKER_SUPPORTS_NO_EXPORTED_SYMBOLS)
      set_property(TARGET ${name} APPEND_STRING PROPERTY
      LINK_FLAGS " -Wl,-no_exported_symbols")
  else()
    message(FATAL_ERROR "LLVM_ENABLE_EXPORTED_SYMBOLS_IN_EXECUTABLES cannot be 
disabled when linker does not support  \" -Wl,-no_exported_symbols\""
  endif()
endif()
```

https://github.com/llvm/llvm-project/pull/87684
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