[Bug binutils/31292] New: objcopy: add --prefix-symbols-remove

[i at maskray dot me]

https://sourceware.org/bugzilla/show_bug.cgi?id=31292

            Bug ID: 31292
           Summary: objcopy: add --prefix-symbols-remove
           Product: binutils
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: i at maskray dot me
  Target Milestone: ---

objcopy supports --prefix-symbols to prefix all symbols.
Perhaps --prefix-symbols-remove= can be added to remove the prefix.

For example,

cat > a.s <<e
.globl a, b
a: b: c: d:
e
cc -c a.s
objcopy --prefix-symbols=z a.o b.o
objcopy --prefix-symbols-remove=z b.o aa.o

% readelf -Ws b.o

Symbol table '.symtab' contains 5 entries:
   Num:    Value          Size Type    Bind   Vis      Ndx Name
     0: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT  UND
     1: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT    1 zc
     2: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT    1 zd
     3: 0000000000000000     0 NOTYPE  GLOBAL DEFAULT    1 za
     4: 0000000000000000     0 NOTYPE  GLOBAL DEFAULT    1 zb

aa.o should be similar to a.o

I see this option proposal from https://github.com/llvm/llvm-project/pull/79415

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