Date: Sat, 24 Jun 2000 05:13:39 -0700 (PDT) From: mhenry@speednet.com.au To: freebsd-gnats-submit@FreeBSD.org Subject: kern/19485: Syscall module example fails to compile Message-ID: <20000624121339.03E0F37B6B1@hub.freebsd.org>
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>Number: 19485
>Category: kern
>Synopsis: Syscall module example fails to compile
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sat Jun 24 05:20:00 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator: Michael Henry
>Release: FreeBSD 4.0-STABLE i386
>Organization:
>Environment:
FreeBSD playground.foonet 4.0-STABLE FreeBSD 4.0-STABLE #0: Thu Jun 15 20:54:58 EST 2000 root@playground.foonet:/usr/obj/usr/src/sys/PLAYGROUND i386
>Description:
I'm getting errors when trying to compile the example system
call in /usr/share/examples/kld/syscall/module/syscall.c.
The version of the file is 1.2.
The errors are as follows:
*** In file included from syscall.c:35:
*** /usr/include/sys/systm.h:327: syntax error before `int'
*** /usr/include/sys/systm.h:328: syntax error before `int'
*** /usr/include/sys/systm.h:329: syntax error before `('
The corresponding lines from the header are:
*** int major(dev_t x);
*** int minor(dev_t x);
*** dev_t makedev(int x, int y);
There is a comment above these lines: "Common `dev_t'
stuff are declared here to avoid #include poisoning".
But these lines are getting mangled by the following
macros defined in <sys/types.h>:
*** #define major(x) ((int)(((u_int)(x) >> 8)&0xff)) /* major number */
*** #define minor(x) ((int)((x)&0xffff00ff)) /* minor number */
*** #define makedev(x,y) ((dev_t)(((x) << 8) | (y))) /* create dev_t */
which, after pre-processing, results in the following:
*** int ((int)(((u_int)( dev_t x ) >> 8)&0xff)) ;
*** int ((int)(( dev_t x )&0xffff00ff)) ;
*** dev_t ((dev_t)((( int x ) << 8) | ( int y ))) ;
Clearly this is nonsense.
>How-To-Repeat:
cd /usr/share/examples/kld/syscall/module/
gcc -c syscall.c
>Fix:
Remove offending lines from <sys/systm.h>
>Release-Note:
>Audit-Trail:
>Unformatted:
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