llvm-objcopy --redefine-syms Does Not Update Symbols in PE/COFF (.dll) Files

[Harishmcw]

Hi Developers,

When using llvm-objcopy on a PE/COFF .dll file to rename symbols using the --redefine-syms option, the command executes successfully, and the timestamp of the file updates. However, when inspecting the modified .dll, the symbols remain unchanged.

Command Executed:

llvm-objcopy --redefine-syms objcopy.def openblas.dll

Definition File (objcopy.def):

lsame_ scipy_lsame_
xerbla_ scipy_xerbla_
isamax_ scipy_isamax_
isamin_ scipy_isamin_
ismax_ scipy_ismax_

Please confirm whether --redefine-syms is expected to work on PE/COFF .dll files. If not, should it be documented as unsupported? Otherwise, if this is a bug, a fix would be greatly appreciated.

[llvmbot]

@llvm/issue-subscribers-tools-llvm-objcopy-strip

Author: None (Harishmcw)

Hi Developers,

When using llvm-objcopy on a PE/COFF .dll file to rename symbols using the --redefine-syms option, the command executes successfully, and the timestamp of the file updates. However, when inspecting the modified .dll, the symbols remain unchanged.

Command Executed:

llvm-objcopy --redefine-syms objcopy.def openblas.dll

Definition File (objcopy.def):

lsame_ scipy_lsame_
xerbla_ scipy_xerbla_
isamax_ scipy_isamax_
isamin_ scipy_isamin_
ismax_ scipy_ismax_

Please confirm whether --redefine-syms is expected to work on PE/COFF .dll files. If not, should it be documented as unsupported? Otherwise, if this is a bug, a fix would be greatly appreciated.