This currently fails because the windows only realpath implementation in
pbd/pathexpand.cc, which is called from PBD::canonical_path to resolve the path
uses Glib::locale_from/to_utf8. As I demonstrated in the
testOpenFileUTF8Filename test case Glib::locale_from/to_utf8 are not the
correct functions to use for this use case as it converts to/from utf-8 to the
locale's current character encoding. On Windows this is most often a single
byte encoding such as Windows-1252 and conversion will fail if the path
contains any characters that are not in system codepage.
GStatBuf is not usable on 32 bit Windows without the redefinition in
pbd/gstdio_compat.h so add a test to check for the correct behavior of
g_stat and g_utime on all platforms now that the issue is fixed.
From this I can see that PBD::copy_file is not working correctly on windows
as it is adding windows style line endings. Adding O_BINARY to ::open flags
would fix it, but perhaps there is a better way...
