[Mesa-dev] Mesa (master): configs: Add -lstdc++ to default.

[Luca Barbieri]

> configs: Add -lstdc++ to default.

Does this actually work if the application itself links to a different
version of libstdc++ such as libstdc++.so.5?

If not, it might be necessary to use -lstdc++_pic to link to the PIC
static library version.
LLVM probably has the same problem too (but in this case I doubt
anyone ships a PIC static library of it).