[Bug libstdc++/49745] error: ‘int truncate’ redeclared as different kind of symbol

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49745

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-07-14 11:01:26 UTC ---
the problem is actually in gthr-posix.h

no libstdc++ header includes <unistd.h> except <ext/stdio_syn_filebuf.h> which
is a non-standard extension and so that's not a problem