Linux gcc 4.7 won't work (too new)

[daemacles]

Hi,

== Problem ==
The DF/libs/libstdc++.so.6 file shipped with DF is too old to be used by dfhack binaries compiled with gcc 4.7. It fails with the following message:

./libs/Dwarf_Fortress: /pathToDF/libs/libstdc++.so.6: version `GLIBCXX_3.4.15' not found (required by ./hack/libdfhack.so)

== Fix ==
A fix is to disable the DF copy of libstdc++.so.6 (e.g. rename to end with .bak) and then symlink the system copy, e.g.

ln -s /usr/lib32/libstd++-libc6.2-2.so.3 /pathToDF/libs/libstdc++.so.6

I happen to be running on 64-bit Debian testing. Compiling happens without problems, it is just a dynamic link time problem.

== Comment ==
Perhaps you could put a comment about this in the Compile.{rst,html} files?

Cheers!