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Subject: [Bug libfortran/50016] [4.7 Regression] Drastic I/O performance regression on Windows
Date: Thu, 20 Oct 2011 06:50:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50016

--- Comment #18 from xunxun <xunxun1982 at gmail dot com> 2011-10-20 06:49:19 UTC ---
(In reply to comment #17)
> Author: burnus
> Date: Wed Oct 19 17:27:03 2011
> New Revision: 180199
> 
> URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=180199
> Log:
> 2011-10-19  Janne Blomqvist  <jb@gcc.gnu.org>
>             Kai Tietz  <ktietz@redhat.com>
>             Tobias Burnus  <burnus@net-b.de>
> 
>         PR fortran/50016
>         * io/unix.h (flush_sync): Add new libgfortran-internal
>         * prototype.
>         * io/unix.c (flush_sync): New function, which calls sflush and
>         on MinGW(-w64) also _commit.
>         (flush_all_units, flush_all_units_1): Replace sflush/_commit by
>         flush_sync.
>         * io/file_pos.c (st_flush): Replace sflush/_commit by
>         * flush_sync.
>         * io/intrinsics.c (flush_i4, flush_i8): Ditto.
> 
> 
> Modified:
>     branches/gcc-4_6-branch/libgfortran/ChangeLog
>     branches/gcc-4_6-branch/libgfortran/io/file_pos.c
>     branches/gcc-4_6-branch/libgfortran/io/intrinsics.c
>     branches/gcc-4_6-branch/libgfortran/io/unix.c
>     branches/gcc-4_6-branch/libgfortran/io/unix.h

Will the rev 180199 merge into gcc4.6.2 release?
Because the first 4.6.2 RC doesn't contain the modify, gcc-4.6.2-RC-20111019
libgfortran build on mingw/mingw64 can cause:

  libtool: compile:  i686-w64-mingw32-gcc
-L/mingw/i686-w64-mingw32/lib -L/mingw/mingw/lib -isystem
/mingw/i686-w64-mingw32/include -isystem /mingw/mingw/include
-DHAVE_CONFIG_H -I. -I../.././libgfortran
-iquote../.././libgfortran/io -I../.././libgfortran/../gcc
-I../.././libgfortran/../gcc/config
-I../.././libgfortran/../libquadmath -I../../host-i686-w64-mingw32/gcc
-D_GNU_SOURCE -std=gnu99 -Wall -Wstrict-prototypes
-Wmissing-prototypes -Wold-style-definition -Wextra -Wwrite-strings
-fcx-fortran-rules -ffunction-sections -fdata-sections -g -pipe -O2
-I/mingw/include -MT file_pos.lo -MD -MP -MF .deps/file_pos.Tpo -c
../.././libgfortran/io/file_pos.c -o file_pos.o
../.././libgfortran/io/file_pos.c: In function 'st_flush':
../.././libgfortran/io/file_pos.c:457:20: error: 'stream' has no
member named 'fd'

I would hope the next 4.6.2 RC or release fix the problem.
Thanks.