py26-mapnik 0.7.1 does not support filesystem 3 in boost 1.46

[macfreek (Freek Dijkstra)]

I just did a port upgrade outdated, which upgrade boost from 1.44.0_0 to 1.46.1_0 and py26-mapnik from 0.7.1_1 to 0.7.1_4.

When py26-mapnik compiles, it gives the following error:

 src/datasource_cache.cpp: In static member function 'static void mapnik::datasource_cache::register_datasources(const std::string&)':
 src/datasource_cache.cpp:146: error: invalid initialization of reference of type 'const std::string&' from expression of type 'boost::filesystem3::path'
 src/datasource_cache.cpp:46: error: in passing argument 1 of 'bool mapnik::is_input_plugin(const std::string&)'
 src/datasource_cache.cpp:152: error: 'class boost::filesystem3::directory_entry' has no member named 'string'
 src/datasource_cache.cpp:167: error: 'class boost::filesystem3::directory_entry' has no member named 'string'

The cause is that boost has done a major upgrade to their filesystem code. ​http://www.boost.org/doc/libs/1_46_1/libs/filesystem/v3/doc/ gives the details:

Version 3 is a major revision with many new and improved features. It may, however, break some user code written for Version 2.

To ease the transition, Boost releases 1.44 through 1.47 will supply both V2 and V3. Version 2 is the default version for Boost release 1.44 and 1.45. Version 3 will be the default starting with release 1.46.

There are patches available at the mapnik website, both to select filesystem version 2 or upgrade to version 3. I have not tested if this works for mapnik 0.7.1 (stable) or 0.7.2 (trunk).

• ​add support for boost::filesystem v3
• ​support for boost trunk (1.46) by enforcing boost filesystem v2
• ​boost filesystem v3 support, ported from trunk

[macfreek (Freek Dijkstra)]

Patchfile to make mapnik work with boost 1.46

[macfreek (Freek Dijkstra)]

patch for the Portfile

[macfreek (Freek Dijkstra)]

patch-boost-filesystem3.diff should be added to the files directory and the Portfile.diff should be applied to the Portfile of py26-mapnik. The patch is based on the ​patch for mapnik 0.7.2-dev and works on my machine. Please verify and if it works, please commit.

[ryandesign (Ryan Carsten Schmidt)]

Thanks; committed in r78521.