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From: Andreas Jaeger <aj@suse.de> To: aj@gcc.gnu.org Cc: gcc-prs@gcc.gnu.org, Subject: Re: libstdc++/8610: std::streamoff type is 32-bit in GCC 3.2 whereas it was 64-bit in GCC 2.96 Date: Sat, 08 Feb 2003 21:36:00 -0000 [thread overview] Message-ID: <20030208213600.30343.qmail@sources.redhat.com> (raw) The following reply was made to PR libstdc++/8610; it has been noted by GNATS. From: Andreas Jaeger <aj@suse.de> To: paolo@gcc.gnu.org Cc: davido@csse.uwa.edu.au, gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org, gcc-gnats@gcc.gnu.org Subject: Re: libstdc++/8610: std::streamoff type is 32-bit in GCC 3.2 whereas it was 64-bit in GCC 2.96 Date: Sat, 08 Feb 2003 22:28:03 +0100 paolo@gcc.gnu.org writes: > Synopsis: std::streamoff type is 32-bit in GCC 3.2 whereas it was 64-bit in GCC 2.96 > > Responsible-Changed-From-To: unassigned->aj > Responsible-Changed-By: paolo > Responsible-Changed-When: Sat Feb 8 20:31:56 2003 > Responsible-Changed-Why: > LFS expert. > State-Changed-From-To: open->analyzed > State-Changed-By: paolo > State-Changed-When: Sat Feb 8 20:31:56 2003 > State-Changed-Why: > Hi Andreas, could you please have a look at this PR? > It's about large file support in Linux and, having browsed > your page > http://www.suse.de/~aj/linux_lfs.html > I think you can answer it _much_ better than me! > Thanks, Paolo. Paolo, I need some help here since I don't know the internals of libstc++. /opt/gcc/3.4-devel/include/c++/3.4/i686-pc-linux-gnu/bits/c++io.h (where does this file come from?) indeed defines: namespace std { // for fpos.h typedef long streamoff; typedef ptrdiff_t streamsize; // Signed integral type And libstdc++/config/io/c_io_libio.h has: namespace std { // from fpos.h typedef _IO_ssize_t streamsize; // Signed integral type typedef _IO_ssize_t wstreamsize; #if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001 typedef _IO_off64_t streamoff; typedef _IO_fpos64_t __c_streampos; #else typedef _IO_off_t streamoff; typedef _IO_fpos_t __c_streampos; #endif For Linux we should IO_IO_FILE_VERSION defined and set to 0x20001. But why is this not done? But the problem is even more subitle. config/io/basic_file_stdio.cc uses fseek/ftell which use a long int and therefore - under 32-bit - allow only 2 GB. You should use fseeko/ftello or fsetpos/fgetpos. Paolo, does this help? Or did I look at the wrong files? Andreas -- Andreas Jaeger SuSE Labs aj@suse.de private aj@arthur.inka.de http://www.suse.de/~aj
next reply other threads:[~2003-02-08 21:36 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2003-02-08 21:36 Andreas Jaeger [this message] -- strict thread matches above, loose matches on Subject: below -- 2003-02-09 13:20 paolo 2003-02-09 12:06 Paolo Carlini 2003-02-09 10:26 Andreas Jaeger 2003-02-08 21:56 Paolo Carlini 2003-02-08 20:31 paolo 2002-11-22 10:26 davido
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