[Tile-serving] [osm2pgsql] Optionally enable C++11 (#332)

[Sarah Hoffmann]

Second attempt to enable C++11. This could do with some testing with different compilers. I've already run into bugs with boost 1.49 (as used in Debian stable).

@pnorman could you test again with your clang setup? Please make sure to run `make distclean` before compiling.
You can view, comment on, or merge this pull request online at:

  https://github.com/openstreetmap/osm2pgsql/pull/332

-- Commit Summary --

  * optionally enable C++11 where available
  * disable C++11 for boost < 1.50 due to bug in library

-- File Changes --

    M configure.ac (4)
    A m4/ax_cxx_compile_stdcxx_11.m4 (142)

-- Patch Links --

https://github.com/openstreetmap/osm2pgsql/pull/332.patch
https://github.com/openstreetmap/osm2pgsql/pull/332.diff

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Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/osm2pgsql/pull/332
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