James McCoy wrote: > Lo and behold, configuring without --enable-perlinterp but adding > "-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64" to PERL_CFLAGS in > src/auto/config.mk reproduces the issue.
Thanks, I did miscompile vim-gtk before and came to the wrong
conclusion about -fwrapv
> Which begs the question, why does configure think the defines aren't
> necessary?
By default in <features.h>, unless something else is requested, we will
define:
| # define _POSIX_C_SOURCE 200809L
| # define __USE_XOPEN2K 1
and that means from <stdio.h> we will get fseeko(), but *not*
__USE_LARGEFILE or __USE_LARGEFILE64:
| #if defined __USE_LARGEFILE || defined __USE_XOPEN2K
| # ifndef __USE_FILE_OFFSET64
[...]
| extern int fseeko (FILE *__stream, __off_t __off, int __whence);
and so vim's configure testcase will pass:
| $as_echo_n "checking for _LARGEFILE_SOURCE value needed for large files... "
>&6; }
| if ${ac_cv_sys_largefile_source+:} false; then :
| $as_echo_n "(cached) " >&6
| else
| while :; do
| cat confdefs.h - <<_ACEOF >conftest.$ac_ext
| /* end confdefs.h. */
| #include <sys/types.h> /* for off_t */
| #include <stdio.h>
| int
| main ()
| {
| int (*fp) (FILE *, off_t, int) = fseeko;
| return fseeko (stdin, 0, 0) && fp (stdin, 0, 0);
| ;
| return 0;
| }
| _ACEOF
| if ac_fn_c_try_link "$LINENO"; then :
| ac_cv_sys_largefile_source=no; break
| fi
I will try to see how the situation is different on linux-i386.
Regards,
--
Steven Chamberlain
ste...@pyro.eu.org
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