For portability, check for error.h during configure and define
HAVE_ERROR_H accordingly.
If this header is not available, emulate the functionality of error()
from glibc with an inline wrapper in include/c.h.
For portability, check for stdio_ext.h during configure and define
HAVE_STDIO_EXT_H accordingly.
If the current system does not provide this header, use a fallback for
__fpending(). This definition will not work on all systems as it relies
on internal data structures of libc. A more portable solution should be
preferred, for example by using gnulib.
./lib/fileutils.c:9:5: warning: no previous declaration for 'close_stream' [-Wmissing-declarations]
./lib/fileutils.c:23:6: warning: no previous declaration for 'close_stdout' [-Wmissing-declarations]
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
