# Define these for your system as follows:
# -DUSGr3 SVR3 (also define USG)
# -DHPUX HP-UX (also define USG and USGr3 appropriately)
-# -DHAVE_VFORK USG, but have vfork
-# -DVFORK_MISSING Not USG, but no vfork
-# -DNO_MINUS_C_MINUS_O cc can't handle "cc -c foo.c -o foo.o"
# -DNO_ARCHIVES To disable `ar' archive support.
# -DNO_FLOAT To avoid using floating-point numbers.
# -DENUM_BITFIELDS If the compiler isn't GCC but groks enum foo:2.