libtool: 2.4.6 uses nm instead of emxexp

[dmik]

Turns out that libtool 2.4.6 unconditionally uses nm instead of emxexp to generate the list of exports for a DLL. And while nm is supposed to work (and works with some projects) in some cases it looses symbols to export. One such project is glib. This looks like a complex regression compared to 2.4.2 that works as expected (uses emxexp).

[dmik]

Note that loosing symbols to export seems to be related to presence of -export-symbols-regex in which case it means that this to some part is a duplicate of #74. However, this really depends of whether nm is used instead of emxexp only when -export-symbols-regex is present or always in 2.4.6. Some more testing is needed.

[dmik]

Testing shows that nm is indeed used only when -export-symbols-regex is given and emxexp is used otherwise. So this ticket is essentially a duplicate of #74 (where it was already tested, frankly saying). Closing it.