https://bugs.llvm.org/show_bug.cgi?id=41898

            Bug ID: 41898
           Summary: --section should warn if combined with a missing
                    section
           Product: tools
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: llvm-objdump
          Assignee: unassignedb...@nondot.org
          Reporter: jh7370.2...@my.bristol.ac.uk
                CC: llvm-bugs@lists.llvm.org

If --section is specified with a section that is not found in the input, GNU
objdump warns, but llvm-objdump does not. It would be useful to have this
warning in llvm-objdump, I think:

binutils@ubuntu:~/Work$ ~/llvm/build/bin/llvm-objdump -D test.o
--section=bazzle

test.o: file format ELF64-x86-64

binutils@ubuntu:~/Work$ objdump -D test.o --section=bazzle

test.o:     file format elf64-x86-64

objdump: section 'bazzle' mentioned in a -j option, but not found in any input
file

Note: when implementing this, make sure that the behaviour matches GNU for
archives where some members have the section and others don't.

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