[Bug binutils/27408] New: nm: Have a way to suppress 'no symbols'

[i at maskray dot me]

https://sourceware.org/bugzilla/show_bug.cgi?id=27408

            Bug ID: 27408
           Summary: nm: Have a way to suppress 'no symbols'
           Product: binutils
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: i at maskray dot me
  Target Milestone: ---

In https://reviews.llvm.org/D83152 , someone wants to have an llvm-nm option to
suppress 'no symbols' diagnostic when the symbol table is absent. I think this
is an area binutils may likely have an opinion so I am asking here. I can think
of several choices.

* Add --no-warning-for-no-symbols.
  macOS libtool has an option named -no_warning_for_no_symbols
* Add --quiet
* Drop 'no symbols' without an option. This has potential risk to make existing
scripts expecting the output unhappy.

nm can also choose to do nothing but promise that it will not intentionally be
incompatible with llvm-nm, i.e. if llvm-nm picks --quiet, nm will not pick
--quiet for other purposes.

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