[RFC] hacking around libtool

[Joerg Sonnenberger via llvm-commits]

On Tue, Dec 06, 2016 at 01:19:26PM -0500, Rafael Avila de Espindola via llvm-commits wrote:
> Trying to build the freebsd ports I hit a failure because the php binary
> was not built with --export-dynamic. It turns out the reason was libtool
> looking at the output of -v and --help to decide if it should use
> --export-dynamic or not.

Just as side note, the optimal behavior for libtool would be to just use
-rdynamic if detects a GCC-like compiler and be done.

Joerg