"John Maddock" <john@johnmaddock.co.uk> wrote in message news:014a01c55deb$42f0eb30$3a1a0952@fuji...
I believe Cygwin uses gcc 3.3, and I had a similar experience with wide character support (or lack thereof) in gcc 3.3.x on Solaris. Upgrading to 3.4.x fixed things. Perhaps you can get a gcc 3.4 package or build the compiler from source to see if this helps. Has anyone here tried this?
It's not going to help: the cygwin dll has no (or at least extremely limited) C language wide character support. Without that there's nothing for libstdc++ to build on. In contrast Solaris did have C language support for wide characters, it's just that libstdc++ wasn't taking advantage of it until 3.4.
I wonder how much work it would be to fix the cygwin dll? Maybe we should either badger the Cygwin folks, or contribute patches. It certainly is a bother not to have wide character support. In the meantime, I've disabled i18n wide character support in Boost.Filesystem for older broken compilers, and any library without locale or wstring support. --Beman