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From: jeff@cjsa.wa.com (Jeffery Small)
Newsgroups: comp.sys.3b1,comp.lang.perl
Subject: Problems compiling perl4.003 on the UNIXPC/3B1
Summary: #define conflict within /usr/include/sys/file.h
Keywords: unixpc perl 3b1 sys/file.h
Message-ID: <1991May3.183553.3605@cjsa.wa.com>
Date: 3 May 91 18:35:53 GMT
Organization: C. Jeffery Small and Associates
Lines: 50

When compiling perl4.003 on the 3B1 using the stock compiler (Version 3.51m),
I get the following messages for toke.o (and ttoke.o):

==============================================================================
    "toke.c", line 2333: warning: illegal member use: f_up
    "toke.c", line 2333: warning: illegal structure pointer combination, op =
    "toke.c", line 2345: warning: illegal member use: f_up
    "toke.c", line 2345: warning: illegal structure pointer combination, op =
    "toke.c", line 2453: warning: illegal member use: f_up
    "toke.c", line 2453: warning: illegal structure pointer combination, op =
    "toke.c", line 2464: warning: illegal member use: f_up
    "toke.c", line 2464: warning: illegal member use: f_type
    "toke.c", line 2517: warning: illegal member use: f_up
    "toke.c", line 2517: warning: illegal structure pointer combination, op =
==============================================================================

This turns out to be a problem with a pre-existing #define in <sys/file.h>
as follows:

== /usr/include/sys/file.h ===================================================

    struct	file
    {
	char	f_flag;
	cnt_t	f_count;	/* reference count */
	union {
		struct inode *f_uinode;	/* pointer to inode structure */
		struct file  *f_unext;	/* next entry in freelist */
	} f_up;
	off_t	f_offset;		/* read/write character pointer */
    };

    #define	f_inode		f_up.f_uinode
    #define	f_next		f_up.f_unext
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
==============================================================================

The perl structure formcmd (FCMD) contains a f_next member and this is being
replaced by "f_up.unext" with obviously bad results.  Although the program
does compile, it is failing on the  comp/decl.t  and  op/write.t  tests -
and I am assuming that these problem are caused by the above situation.

Before I hack things up I wanted to see if there was a standard patch or
fix for this condition?  Have others gotten perl to compile on this platform
without problems?  Are you including sys/file.h in your config.sh?

Thanks for any help you may be able to offer.
--
Jeff Small                     C. Jeffery Small & Associates    (206) 232-3338
uunet!nwnexus!cjsa!jeff        7000 E Mercer Way,  Mercer Island, WA     98040