9.311 ftell

POSIX specification:
http://www.opengroup.org/onlinepubs/9699919799/functions/ftell.html

Gnulib module: ftell

Portability problems fixed by Gnulib:

• This function mistakenly succeeds on pipes on some platforms: mingw, MSVC 9.
• This function produces incorrect results after putc that followed a getc call that reached EOF on some platforms: Solaris 11 2010-11.

Portability problems not fixed by Gnulib:

• This function produces incorrect results immediately after fseek on some platforms: HP-UX 11.
• fflush, ftell, ftello, fgetpos behave incorrectly on input streams that are opened in O_TEXT mode and whose contents contains Unix line terminators (LF), on some platforms: mingw, MSVC 9.
• On platforms where long is a 32-bit type, ftell does not work correctly with files larger than 2 GB, even when the AC_SYS_LARGEFILE macro is used. The fix is to use ftello instead.