[llvm] [llvm-objcopy] Check for missing argument values (PR #70710)

[James Henderson via llvm-commits]

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@@ -0,0 +1,4 @@
+## An error must be reported if a required argument value is missing.
+# RUN: not llvm-objcopy --only-section 2>&1 | FileCheck --check-prefix=CHECK-NO-VALUE %s
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jh7370 wrote:

Unless you have explicit plans to extend the test in the near future, go with the simpler approach now (default prefix). If we need to change it in the future, we can.

https://github.com/llvm/llvm-project/pull/70710