This variable conditionally defines the HAS_FCNTL symbol, and indicates
whether the fcntl() function exists
+d_fcntl_can_lock (d_fcntl_can_lock.U):
+ This variable conditionally defines the FCNTL_CAN_LOCK symbol
+ and indicates whether file locking with fcntl() works.
+
d_fd_macros (d_fd_set.U):
This variable contains the eventual value of the HAS_FD_MACROS symbol,
which indicates if your C compiler knows about the macros which
This variable conditionally defines STDIO_PTR_LVALUE if the
FILE_ptr macro can be used as an lvalue.
+d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
+ This symbol is defined if using the FILE_ptr macro as an lvalue
+ to increase the pointer by n leaves File_cnt(fp) unchanged.
+
+d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
+ This symbol is defined if using the FILE_ptr macro as an lvalue
+ to increase the pointer by n has the side effect of decreasing the
+ value of File_cnt(fp) by n.
+
d_stdio_stream_array (stdio_streams.U):
This variable tells whether there is an array holding
the stdio streams.