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and subject line Bug#178960: libc6-dev: sys/stat.h: lstat declaration omitted
with -ansi compiler option
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Date: 29 Jan 2003 19:07:55 -0000
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From: Jeff Sheinberg <[EMAIL PROTECTED]>
Subject: libc6-dev: sys/stat.h: lstat declaration omitted with -ansi compiler
option
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Hi,
When I include <sys/stat.h> and also specify the "-ansi" option to
the C compiler, then the declaration for the "lstat" function is
omitted.
Note that the declaration for the "fstat" function is properly
generated, regardless of whether the "-ansi" option is specified
or not.
Here is the simplest test case that I could come up with,
227 jeff ~ $ echo '#include <sys/stat.h>' | gcc-2.95 -c - -E | grep
-e [fl]stat
extern int fstat (int __fd, struct stat *__buf) ;
extern int lstat (__const char *__restrict __file,
extern __inline__ int lstat (__const char *__path,
extern __inline__ int fstat (int __fd, struct stat *__statbuf)
228 jeff ~ $ echo '#include <sys/stat.h>' | gcc-2.95 -ansi -c - -E |
grep -e [fl]stat
extern int fstat (int __fd, struct stat *__buf) ;
extern __inline__ int fstat (int __fd, struct stat *__statbuf)
Here is an excerpt from "/usr/include/sys/stat.h", where the
declarations for "[fl]stat" are (supposed to be) generated,
198: #ifndef __USE_FILE_OFFSET64
199: /* Get file attributes for FILE and put them in BUF. */
200: extern int stat (__const char *__restrict __file,
201: struct stat *__restrict __buf) __THROW;
202:
203: /* Get file attributes for the file, device, pipe, or socket
204: that file descriptor FD is open on and put them in BUF. */
205: extern int fstat (int __fd, struct stat *__buf) __THROW;
206: #else
207: # ifdef __REDIRECT
208: extern int __REDIRECT (stat,
209: (__const char *__restrict __file,
210: struct stat *__restrict __buf) __THROW,
211: stat64);
212: extern int __REDIRECT (fstat, (int __fd, struct stat *__buf) __THROW, fsta
t64);
213: # else
214: # define stat stat64
215: # define fstat fstat64
216: # endif
217: #endif
218: #ifdef __USE_LARGEFILE64
219: extern int stat64 (__const char *__restrict __file,
220: struct stat64 *__restrict __buf) __THROW;
221: extern int fstat64 (int __fd, struct stat64 *__buf) __THROW;
222: #endif
223:
224: #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
225: # ifndef __USE_FILE_OFFSET64
226: /* Get file attributes about FILE and put them in BUF.
227: If FILE is a symbolic link, do not follow it. */
228: extern int lstat (__const char *__restrict __file,
229: struct stat *__restrict __buf) __THROW;
230: # else
231: # ifdef __REDIRECT
232: extern int __REDIRECT (lstat,
233: (__const char *__restrict __file,
234: struct stat *__restrict __buf) __THROW,
235: lstat64);
236: # else
237: # define lstat lstat64
238: # endif
239: # endif
240: # ifdef __USE_LARGEFILE64
241: extern int lstat64 (__const char *__restrict __file,
242: struct stat64 *__restrict __buf) __THROW;
243: # endif
244: #endif
Note that I also tried the same test case as above, but in
addition, I also included <unistd.h> as the first include
statement, and I got the same same results, ie, the "lstat"
declaration was not generated.
I found this bug by using the C compiler's "-Wmissing-prototypes"
option.
Thanks,
--
Jeff Sheinberg
-- System Information
Debian Release: testing/sarge
Kernel Version: Linux l1.bsrd.net 2.4.19-1 #1 Sat Aug 24 17:01:11 EDT 2002 i586
AMD-K6(tm) 3D processor AuthenticAMD GNU/Linux
Versions of the packages libc6-dev depends on:
ii libc6 2.2.5-14.3 GNU C Library: Shared libraries and Timezone
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Date: Mon, 05 Jul 2004 19:30:52 +0900
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From: GOTO Masanori <[EMAIL PROTECTED]>
To: Jeff Sheinberg <[EMAIL PROTECTED]>, [EMAIL PROTECTED]
Subject: Re: Bug#178960: libc6-dev: sys/stat.h: lstat declaration omitted with
-ansi compiler option
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At 29 Jan 2003 19:07:55 -0000,
Jeff Sheinberg wrote:
> When I include <sys/stat.h> and also specify the "-ansi" option to
> the C compiler, then the declaration for the "lstat" function is
> omitted.
>
> Note that the declaration for the "fstat" function is properly
> generated, regardless of whether the "-ansi" option is specified
> or not.
>
> Here is the simplest test case that I could come up with,
>
> 227 jeff ~ $ echo '#include <sys/stat.h>' | gcc-2.95 -c - -E | grep
> -e [fl]stat
> extern int fstat (int __fd, struct stat *__buf) ;
> extern int lstat (__const char *__restrict __file,
> extern __inline__ int lstat (__const char *__path,
> extern __inline__ int fstat (int __fd, struct stat *__statbuf)
>
> 228 jeff ~ $ echo '#include <sys/stat.h>' | gcc-2.95 -ansi -c - -E |
> grep -e [fl]stat
> extern int fstat (int __fd, struct stat *__buf) ;
> extern __inline__ int fstat (int __fd, struct stat *__statbuf)
Look at line 224:
> 224: #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
> 225: # ifndef __USE_FILE_OFFSET64
> 226: /* Get file attributes about FILE and put them in BUF.
> 227: If FILE is a symbolic link, do not follow it. */
> 228: extern int lstat (__const char *__restrict __file,
> 229: struct stat *__restrict __buf) __THROW;
> 230: # else
> 231: # ifdef __REDIRECT
> 232: extern int __REDIRECT (lstat,
> 233: (__const char *__restrict __file,
> 234: struct stat *__restrict __buf) __THROW,
> 235: lstat64);
> 236: # else
> 237: # define lstat lstat64
> 238: # endif
> 239: # endif
> 240: # ifdef __USE_LARGEFILE64
> 241: extern int lstat64 (__const char *__restrict __file,
> 242: struct stat64 *__restrict __buf) __THROW;
> 243: # endif
> 244: #endif
It says the lstat() needs __USE_BSD or __USE_XOPEN_EXTENDED. -ansi
refuses this kind of functions. There's no problem. I close this bug.
Regards,
-- gotom
