graph-tool 2.10 fails to compile on OS X 10.10 and older
The latest version compiles on OS X 10.11, but on older machines there are these errors:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/tuple:180:73: error: reference to type 'graph_tool::GraphInterface' requires an initializer
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/tuple:181:9: error: static_assert failed "Attempted to default construct a reference element in a tuple"
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/tuple:402:13: error: no matching constructor for initialization of '__tuple_leaf<1UL, graph_tool::GraphInterface &>'
The complete build log can be found at https://build.macports.org/builders/buildports-yosemite-x86_64/builds/6038/steps/compile/logs/stdio. Search for the string ": error:" and you should be able to find the errors above in context.