Date: Sat, 24 Jun 2000 07:30:02 -0700 (PDT) From: Ruslan Ermilov <ru@sunbay.com> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/19485: Syscall module example fails to compile Message-ID: <200006241430.HAA39664@freefall.freebsd.org>
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The following reply was made to PR kern/19485; it has been noted by GNATS.
From: Ruslan Ermilov <ru@sunbay.com>
To: mhenry@speednet.com.au
Cc: bug-followup@FreeBSD.org
Subject: Re: kern/19485: Syscall module example fails to compile
Date: Sat, 24 Jun 2000 17:26:31 +0300
On Sat, Jun 24, 2000 at 05:13:39AM -0700, mhenry@speednet.com.au wrote:
>
> 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
>
Try `gcc -D_KERNEL -c syscall.c' or better yet just `make' :-)
> >Fix:
> Remove offending lines from <sys/systm.h>
>
Add -D_KERNEL to CFLAGS.
--
Ruslan Ermilov Oracle Developer/DBA,
ru@sunbay.com Sunbay Software AG,
ru@FreeBSD.org FreeBSD committer,
+380.652.512.251 Simferopol, Ukraine
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