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From: chris@bwilab3.UUCP (Chris Curtin)
Newsgroups: comp.sys.hp
Subject: _HPUX_SOURCE Defintion and ANSI C
Keywords: ANSI C
Message-ID: <136@bwilab3.UUCP>
Date: 19 Dec 90 19:08:53 GMT
Organization: Bradley Ward Inc., Atlanta, Ga
Lines: 49



Hello,

  I am trying to write ANSI C programs that use calls to UN*X specific 
functions. When compiling in ANSI mode i.e. -Aa the compiler cannot find
function prototypes and definitions in some header files. In non ANSI mode
the definitions are found.

I was told to resolve this problem by #defining _HPUX_SOURCE. This solves
the problem of the compiler not finding the prototypes but raises some
questions about what it does. I was also told, by someone else, that the
_HPUX_SOURCE tells the compiler that I am compiling kernel code. Is this
true? Is there a better way to get access to the routines than _HPUX_SOURCE?
What problems am I opening up by using this? (i.e. am I allowing access to
kernel routines that I am not supposed to?)

Info about our system:

 HP 9000-835
 HP-UX 7.0
 HP C Compiler A.07.10

Also, i have noticed that the semun union is not defined in the <sys/sem.h>
header file. We had to define our own to be able to use semaphores in ANSI
mode.

The header files that did not include the proper defs without _HPUX_SOPURCE,
that I used are:
 
 <sys/sem.h>
 <fcntl.h>
 <stdio.h> and
 <sys/types.h>
 - These are the ones that I have found and I am sure that the others have the
same problems.

Any suggestions or comments are welcome.

Thanks

Chris

--

Christopher M. Curtin
Bradley Ward Inc.
Atlanta Ga.
{ ..!gatech!galbp!bwilab3!chris}