[PATCH] D56215: [lld] [ELF] Include default search paths for NetBSD driver

[Joerg Sonnenberger via llvm-commits]

On Fri, Jan 04, 2019 at 02:48:35PM +0000, Alexander Richardson via Phabricator wrote:
> Or if you really need to call the linker directly without specifying
> search paths you could also install a shell script as /usr/bin/ld that
> passes the appropriate flags to /usr/bin/ld.lld?

That's not a honest suggestion, is it?

> I don't think ifdefs in the source code are a good idea. Cross linking
> should just work as expected. But you could look at the OS field in the
> first input ELF file to choose default config options/a different
> emulation for NetBSD.

No, #if is certainly wrong. Using the OS field doesn't work though,
because it is typically not set. I think only FreeBSD ever did.

> The approach we are using in CheriBSD to differentiate between MIPS and
> CHERI pure-capability to either pass an explicitly
> `-m elf_btsmip_cheri_fbsd`/ `-m elf_btsmip_fbsd` or infer whether it is
> CHERI or MIPS based on the e_flags field of the first input file.

Yeah, but introducing new emulation names goes back to having to modify
things, which would defeat the purpose just as well.

Joerg