Question

this code:

boost::filesystem::is_directory("/usr/include");

work fine.

both this code:

boost::filesystem::is_directory(L"/usr/include");

throw an exception:

terminate called after throwing an
instance of ‘std::runtime_error’
what():
locale::facet::_S_create_c_locale name
not valid

OS – Linux Mint

boost-1.43

gcc-4.6.0

Answer 1

1. Don’t use wide strings on Linux. You don’t need them..

2. What happens that it tries to convert wide string to normal one and for this
   creates a locale and probably this locale is not configured in your system.

   Bring output of commands:

   locale 
   locale -a
   

3. GCC-4.6 wasn’t released yet ;-), check if this works with ordinary compiler. Probably libstdc++ wasn’t build well.