Which I think is insufficient. Probably some of the support was removed?
No.. It is just that there was no support for loadable modules for those
older Cygwin toolchains. The underscore has not been used with Cygwin
since around 2015 so I think would be safe to just remove the
CONFIG_SIM_CYGWIN_DECORATED configuration.
In your case, I think you have two options:
1) Write a tool to rename all of the symbols in the library to remove
the leading underscore (using objcopy --redefine-syms), or
2) Modify the elf loader[s] to conditionally prepend the '_' character
before looking up the symbol by name.
