HP compiler

• Sizes are as follows

  char  8bit  (signed by default)
  short 16bit
  int   32bit
  long  32bit
  

  Note that type conversions are sign, not value, preserving. E.g.:-

      `unsigned char' promotes to `unsigned int' then to `int',
  NOT `unsigned char' promotes to `char'         then to `int'.
  

• See [3] for how to call functions in other languages.

• `cc -Aa' or `c89' can be used to compile ANSI C programs. The ANSI standard does not allow an implementation to take symbols like hpux away from your namespace - it is supposed to be free for the programmer to use in any way. Thus traditionally predefined symbols like hpux or unix or hp9000s800 may not be defined by default in ANSI. If you want them, add -D_HPUX_SOURCE. This is discussed in the cc(1) man page under the "-Aa" option (ANSI mode).

• There are 3 levels of optimisation. `-O' is equivalent to `+O2'.
• +w1 gives the most warning messages.