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From: harris@sauron.Columbia.NCR.COM (Ray Harris)
Newsgroups: comp.sys.ncr
Subject: Re: header file problems
Keywords: header types.h
Message-ID: <1991Apr12.083036.27340@nncrcae.Columbia.NCR.COM>
Date: 12 Apr 91 12:30:36 GMT
References: <727@uswnvg.UUCP>
Organization: NCR Corp, E&M-Columbia, Columbia, SC
Lines: 28
Nntp-Posting-Host: sauron

In article <727@uswnvg.UUCP> rfadler@uswnvg.UUCP (Richard Fadler) writes:
->I have a Tower 450 running UnixV.3 version 030001 with the appropriate 
[....]
->In code that previously compiled with no problem I began seeing an error
->where an include statement that includes <sys/types.h> causes an error
->stating that on line 12 of /usr/include/sys/types.h there is a syntax
->error.  It turns out that one of our own header files also includes
->/sys/types.h and if either one of the lines is commented out it compiles
->fine.
[....]
->This compiles just fine our NCR 3000 running SysV.4, a Sequent running ptx,
->and a Pyramid running osx, but not on the Tower.  Before the disk crashed it

The V.4 header files on the System 3000 use the following construct:

#ifndef _SYS_TYPES_H
#define _SYS_TYPES_H

Body of header file here

#endif  /* _SYS_TYPES_H */

This allows you to include the same include file more than once without
the problem you're encountering.
-- 

Ray.Harris@ncrcae.Columbia.NCR.COM (Ray Harris)    
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