This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
which indicates that the struct cmsghdr is supported.
-d_const (d_const.U):
- This variable conditionally defines the HASCONST symbol, which
- indicates to the C program that this C compiler knows about the
- const type.
-
d_copysign (d_copysign.U):
This variable conditionally defines the HAS_COPYSIGN symbol, which
indicates to the C program that the copysign() routine is available.