Re: [eigen] Dev branch: Name clash with termios system header

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2009/9/18 Adolfo Rodríguez <dofo79@xxxxxxxxx>:
> Hi all,
> We recently updated from the stable to the development branch of eigen to
> try out the new SVD implementations. In doing so we encountered a nasty name
> clash, which is not eigen's fault, but for archival purposes I think it's
> good to comment it here on the list, just in case someone else bumps into
> it.
> It turns out that including termios.h (definitions used by the terminal I/O
> interfaces) defines the macro B0 (specific offending header:
> bits/termios.h), which incidentally is a local variable in
> Core/products/GeneralBlockPanelKernel.h. We currently get away with the
> situation by undefing B0 in the corresponding file, but this is an ugly hack
> in the long run. Since there is no chance that those legacy termios macros
> will change, could it be possible to rename the temporaries in
> Core/products/GeneralBlockPanelKernel.h to slightly less generic names?
> (prepending/appending 1-2 characters should be enough).

This isn't the first time that we have to #undef very polluting
symbols from standard headers: we already have to undef "vector" from
Apple's altivec.h, and "minor" from the GNU libc headers, among

bits/termios.h isn't a C++ header, it's a C header, so in fact it's
just an "accident" that you can use it in C++, so i'll just #undef B0.

FYI, in C++, the reserved symbols that the standard library may claim
must start  _ and then a capital letter, e.g. _B0.


> Thanks in advance,
> Adolfo.
> --
> Adolfo Rodríguez Tsouroukdissian, Ph. D.
> Robotics engineer
> Tel. +34.93.414.53.47
> Fax.+
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