[v2,01/18] RISC-V: Use 64-bit time_t and off_t for RV32 and RV64
Commit Message
Using the original glibc headers under bits/ let's make small
modifications to use 64-bit time_t and off_t for both RV32 and RV64.
For the typesizes.h, here are justifications for the changes from the
generic version (based on Arnd's very helpful feedback):
- All the !__USE_FILE_OFFSET64 types (__off_t, __ino_t, __rlim_t, ...) are
changed to match the 64-bit replacements.
- __time_t is defined to 64 bit, but no __time64_t is added. This makes sense
as we don't have the time64 support for other 32-bit architectures yet, and
it will be easy to change when that happens.
- __suseconds_t is 64-bit. This matches what we use the kernel ABI for the
few drivers that are relying on 'struct timeval' input arguments in
ioctl, as well as the adjtimex system call. It means that timeval has to
be defined without the padding, unlike timespec, which needs padding.
---
.../unix/sysv/linux/riscv/bits/environments.h | 85 +++++++++++++++++++
sysdeps/unix/sysv/linux/riscv/bits/time64.h | 36 ++++++++
sysdeps/unix/sysv/linux/riscv/bits/timesize.h | 22 +++++
sysdeps/unix/sysv/linux/riscv/kernel_stat.h | 23 +++++
4 files changed, 166 insertions(+)
create mode 100644 sysdeps/unix/sysv/linux/riscv/bits/environments.h
create mode 100644 sysdeps/unix/sysv/linux/riscv/bits/time64.h
create mode 100644 sysdeps/unix/sysv/linux/riscv/bits/timesize.h
create mode 100644 sysdeps/unix/sysv/linux/riscv/kernel_stat.h
Comments
On Wed, 3 Jun 2020, Alistair Francis via Libc-alpha wrote:
> Using the original glibc headers under bits/ let's make small
> modifications to use 64-bit time_t and off_t for both RV32 and RV64.
>
> For the typesizes.h, here are justifications for the changes from the
> generic version (based on Arnd's very helpful feedback):
> - All the !__USE_FILE_OFFSET64 types (__off_t, __ino_t, __rlim_t, ...) are
^^ ^^
Please remove extraneous spaces above.
> changed to match the 64-bit replacements.
>
> - __time_t is defined to 64 bit, but no __time64_t is added. This makes sense
> as we don't have the time64 support for other 32-bit architectures yet, and
> it will be easy to change when that happens.
>
> - __suseconds_t is 64-bit. This matches what we use the kernel ABI for the
> few drivers that are relying on 'struct timeval' input arguments in
> ioctl, as well as the adjtimex system call. It means that timeval has to
> be defined without the padding, unlike timespec, which needs padding.
^^^
Likewise.
The commit description will be indented by 4 when presented by `git log',
etc., so please reformat so as to stay within 74-75 columns to avoid line
wrapping. Also use two spaces after the end of a sentence throughout.
Please apply these guidelines across the whole series.
> diff --git a/sysdeps/unix/sysv/linux/riscv/bits/environments.h b/sysdeps/unix/sysv/linux/riscv/bits/environments.h
> new file mode 100644
> index 0000000000..c1768af17b
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/riscv/bits/environments.h
> @@ -0,0 +1,85 @@
> +/* Copyright (C) 2019-2020 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <http://www.gnu.org/licenses/>. */
We've switched to HTTPS, so: <https://www.gnu.org/licenses/>.
> +/* This header should define the following symbols under the described
> + situations. A value `1' means that the model is always supported,
> + `-1' means it is never supported. Undefined means it cannot be
> + statically decided.
> +
> + _POSIX_V7_ILP32_OFF32 32bit int, long, pointers, and off_t type
> + _POSIX_V7_ILP32_OFFBIG 32bit int, long, and pointers and larger off_t type
> +
> + _POSIX_V7_LP64_OFF32 64bit long and pointers and 32bit off_t type
> + _POSIX_V7_LPBIG_OFFBIG 64bit long and pointers and large off_t type
Stray tab after _POSIX_V7_LP64_OFF32?
> +#else /* __WORDSIZE == 32 */
> +
> +/* RISC-V requires 64-bit off_t
> + # undef _POSIX_V7_ILP32_OFF32
> + # undef _POSIX_V6_ILP32_OFF32
> + # undef _XBS5_ILP32_OFF32
> + */
If 64-bit `off_t' is required, then shouldn't these be #define'd to -1
instead? Otherwise under what circumstances support for these models will
have to be determined at run time?
+# define _POSIX_V7_ILP32_OFFBIG 1
+# define _POSIX_V6_ILP32_OFFBIG 1
+# define _XBS5_ILP32_OFFBIG 1
Please use tabs here like with the rest of the macros.
> +/* CFLAGS. */
> +#define __ILP32_OFFBIG_CFLAGS "-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
Likewise if 64-bit `off_t' is required, then why do we have to define
these macros in CFLAGS and what happens if they aren't defined?
Please use a tab here as well (assuming this macro does have to exist).
> diff --git a/sysdeps/unix/sysv/linux/riscv/bits/time64.h b/sysdeps/unix/sysv/linux/riscv/bits/time64.h
> new file mode 100644
> index 0000000000..7ba0dd1cfd
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/riscv/bits/time64.h
> @@ -0,0 +1,36 @@
> +/* bits/time64.h -- underlying types for __time64_t. Generic version.
"RISC-V version." presumably?
> + Copyright (C) 2019-2020 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <http://www.gnu.org/licenses/>. */
<https://www.gnu.org/licenses/>
> diff --git a/sysdeps/unix/sysv/linux/riscv/bits/timesize.h b/sysdeps/unix/sysv/linux/riscv/bits/timesize.h
> new file mode 100644
> index 0000000000..78394b7489
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/riscv/bits/timesize.h
> @@ -0,0 +1,22 @@
> +/* Bit size of the time_t type at glibc build time, general case.
"RISC-V case."?
> + Copyright (C) 2019-2020 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <http://www.gnu.org/licenses/>. */
<https://www.gnu.org/licenses/>
> diff --git a/sysdeps/unix/sysv/linux/riscv/kernel_stat.h b/sysdeps/unix/sysv/linux/riscv/kernel_stat.h
> new file mode 100644
> index 0000000000..25e698b9bf
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/riscv/kernel_stat.h
> @@ -0,0 +1,23 @@
> +/* Copyright (C) 2019-2020 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library. If not, see
> + <http://www.gnu.org/licenses/>. */
<https://www.gnu.org/licenses/>
Maciej
On Tue, Jul 7, 2020 at 3:07 PM Maciej W. Rozycki via Libc-alpha
<libc-alpha@sourceware.org> wrote:
>
> On Wed, 3 Jun 2020, Alistair Francis via Libc-alpha wrote:
>
> > Using the original glibc headers under bits/ let's make small
> > modifications to use 64-bit time_t and off_t for both RV32 and RV64.
> >
> > For the typesizes.h, here are justifications for the changes from the
> > generic version (based on Arnd's very helpful feedback):
> > - All the !__USE_FILE_OFFSET64 types (__off_t, __ino_t, __rlim_t, ...) are
> ^^ ^^
> Please remove extraneous spaces above.
Fixed.
>
> > changed to match the 64-bit replacements.
> >
> > - __time_t is defined to 64 bit, but no __time64_t is added. This makes sense
> > as we don't have the time64 support for other 32-bit architectures yet, and
> > it will be easy to change when that happens.
> >
> > - __suseconds_t is 64-bit. This matches what we use the kernel ABI for the
> > few drivers that are relying on 'struct timeval' input arguments in
> > ioctl, as well as the adjtimex system call. It means that timeval has to
> > be defined without the padding, unlike timespec, which needs padding.
> ^^^
> Likewise.
Fixed.
>
> The commit description will be indented by 4 when presented by `git log',
> etc., so please reformat so as to stay within 74-75 columns to avoid line
> wrapping. Also use two spaces after the end of a sentence throughout.
> Please apply these guidelines across the whole series.
>
> > diff --git a/sysdeps/unix/sysv/linux/riscv/bits/environments.h b/sysdeps/unix/sysv/linux/riscv/bits/environments.h
> > new file mode 100644
> > index 0000000000..c1768af17b
> > --- /dev/null
> > +++ b/sysdeps/unix/sysv/linux/riscv/bits/environments.h
> > @@ -0,0 +1,85 @@
> > +/* Copyright (C) 2019-2020 Free Software Foundation, Inc.
> > + This file is part of the GNU C Library.
> > +
> > + The GNU C Library is free software; you can redistribute it and/or
> > + modify it under the terms of the GNU Lesser General Public
> > + License as published by the Free Software Foundation; either
> > + version 2.1 of the License, or (at your option) any later version.
> > +
> > + The GNU C Library is distributed in the hope that it will be useful,
> > + but WITHOUT ANY WARRANTY; without even the implied warranty of
> > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> > + Lesser General Public License for more details.
> > +
> > + You should have received a copy of the GNU Lesser General Public
> > + License along with the GNU C Library; if not, see
> > + <http://www.gnu.org/licenses/>. */
>
> We've switched to HTTPS, so: <https://www.gnu.org/licenses/>.
Fixed in all patches.
>
> > +/* This header should define the following symbols under the described
> > + situations. A value `1' means that the model is always supported,
> > + `-1' means it is never supported. Undefined means it cannot be
> > + statically decided.
> > +
> > + _POSIX_V7_ILP32_OFF32 32bit int, long, pointers, and off_t type
> > + _POSIX_V7_ILP32_OFFBIG 32bit int, long, and pointers and larger off_t type
> > +
> > + _POSIX_V7_LP64_OFF32 64bit long and pointers and 32bit off_t type
> > + _POSIX_V7_LPBIG_OFFBIG 64bit long and pointers and large off_t type
>
> Stray tab after _POSIX_V7_LP64_OFF32?
Fixed
>
> > +#else /* __WORDSIZE == 32 */
> > +
> > +/* RISC-V requires 64-bit off_t
> > + # undef _POSIX_V7_ILP32_OFF32
> > + # undef _POSIX_V6_ILP32_OFF32
> > + # undef _XBS5_ILP32_OFF32
> > + */
>
> If 64-bit `off_t' is required, then shouldn't these be #define'd to -1
> instead? Otherwise under what circumstances support for these models will
> have to be determined at run time?
I have changed this to -1
>
> +# define _POSIX_V7_ILP32_OFFBIG 1
> +# define _POSIX_V6_ILP32_OFFBIG 1
> +# define _XBS5_ILP32_OFFBIG 1
>
> Please use tabs here like with the rest of the macros.
Fixed.
>
> > +/* CFLAGS. */
> > +#define __ILP32_OFFBIG_CFLAGS "-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
>
> Likewise if 64-bit `off_t' is required, then why do we have to define
> these macros in CFLAGS and what happens if they aren't defined?
I have removed this.
>
> Please use a tab here as well (assuming this macro does have to exist).
>
> > diff --git a/sysdeps/unix/sysv/linux/riscv/bits/time64.h b/sysdeps/unix/sysv/linux/riscv/bits/time64.h
> > new file mode 100644
> > index 0000000000..7ba0dd1cfd
> > --- /dev/null
> > +++ b/sysdeps/unix/sysv/linux/riscv/bits/time64.h
> > @@ -0,0 +1,36 @@
> > +/* bits/time64.h -- underlying types for __time64_t. Generic version.
>
> "RISC-V version." presumably?
Fixed as well as all the comments below.
Thanks for reviewing!
Alistair
>
> > + Copyright (C) 2019-2020 Free Software Foundation, Inc.
> > + This file is part of the GNU C Library.
> > +
> > + The GNU C Library is free software; you can redistribute it and/or
> > + modify it under the terms of the GNU Lesser General Public
> > + License as published by the Free Software Foundation; either
> > + version 2.1 of the License, or (at your option) any later version.
> > +
> > + The GNU C Library is distributed in the hope that it will be useful,
> > + but WITHOUT ANY WARRANTY; without even the implied warranty of
> > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> > + Lesser General Public License for more details.
> > +
> > + You should have received a copy of the GNU Lesser General Public
> > + License along with the GNU C Library; if not, see
> > + <http://www.gnu.org/licenses/>. */
>
> <https://www.gnu.org/licenses/>
>
> > diff --git a/sysdeps/unix/sysv/linux/riscv/bits/timesize.h b/sysdeps/unix/sysv/linux/riscv/bits/timesize.h
> > new file mode 100644
> > index 0000000000..78394b7489
> > --- /dev/null
> > +++ b/sysdeps/unix/sysv/linux/riscv/bits/timesize.h
> > @@ -0,0 +1,22 @@
> > +/* Bit size of the time_t type at glibc build time, general case.
>
> "RISC-V case."?
>
> > + Copyright (C) 2019-2020 Free Software Foundation, Inc.
> > + This file is part of the GNU C Library.
> > +
> > + The GNU C Library is free software; you can redistribute it and/or
> > + modify it under the terms of the GNU Lesser General Public
> > + License as published by the Free Software Foundation; either
> > + version 2.1 of the License, or (at your option) any later version.
> > +
> > + The GNU C Library is distributed in the hope that it will be useful,
> > + but WITHOUT ANY WARRANTY; without even the implied warranty of
> > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> > + Lesser General Public License for more details.
> > +
> > + You should have received a copy of the GNU Lesser General Public
> > + License along with the GNU C Library; if not, see
> > + <http://www.gnu.org/licenses/>. */
>
> <https://www.gnu.org/licenses/>
>
> > diff --git a/sysdeps/unix/sysv/linux/riscv/kernel_stat.h b/sysdeps/unix/sysv/linux/riscv/kernel_stat.h
> > new file mode 100644
> > index 0000000000..25e698b9bf
> > --- /dev/null
> > +++ b/sysdeps/unix/sysv/linux/riscv/kernel_stat.h
> > @@ -0,0 +1,23 @@
> > +/* Copyright (C) 2019-2020 Free Software Foundation, Inc.
> > + This file is part of the GNU C Library.
> > +
> > + The GNU C Library is free software; you can redistribute it and/or
> > + modify it under the terms of the GNU Lesser General Public
> > + License as published by the Free Software Foundation; either
> > + version 2.1 of the License, or (at your option) any later version.
> > +
> > + The GNU C Library is distributed in the hope that it will be useful,
> > + but WITHOUT ANY WARRANTY; without even the implied warranty of
> > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> > + Lesser General Public License for more details.
> > +
> > + You should have received a copy of the GNU Lesser General Public
> > + License along with the GNU C Library. If not, see
> > + <http://www.gnu.org/licenses/>. */
>
> <https://www.gnu.org/licenses/>
>
> Maciej
new file mode 100644
@@ -0,0 +1,85 @@
+/* Copyright (C) 2019-2020 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _UNISTD_H
+# error "Never include this file directly. Use <unistd.h> instead"
+#endif
+
+#include <bits/wordsize.h>
+
+/* This header should define the following symbols under the described
+ situations. A value `1' means that the model is always supported,
+ `-1' means it is never supported. Undefined means it cannot be
+ statically decided.
+
+ _POSIX_V7_ILP32_OFF32 32bit int, long, pointers, and off_t type
+ _POSIX_V7_ILP32_OFFBIG 32bit int, long, and pointers and larger off_t type
+
+ _POSIX_V7_LP64_OFF32 64bit long and pointers and 32bit off_t type
+ _POSIX_V7_LPBIG_OFFBIG 64bit long and pointers and large off_t type
+
+ The macros _POSIX_V6_ILP32_OFF32, _POSIX_V6_ILP32_OFFBIG,
+ _POSIX_V6_LP64_OFF32, _POSIX_V6_LPBIG_OFFBIG, _XBS5_ILP32_OFF32,
+ _XBS5_ILP32_OFFBIG, _XBS5_LP64_OFF32, and _XBS5_LPBIG_OFFBIG were
+ used in previous versions of the Unix standard and are available
+ only for compatibility.
+*/
+
+#if __WORDSIZE == 64
+
+/* We can never provide environments with 32-bit wide pointers. */
+# define _POSIX_V7_ILP32_OFF32 -1
+# define _POSIX_V7_ILP32_OFFBIG -1
+# define _POSIX_V6_ILP32_OFF32 -1
+# define _POSIX_V6_ILP32_OFFBIG -1
+# define _XBS5_ILP32_OFF32 -1
+# define _XBS5_ILP32_OFFBIG -1
+/* We also have no use (for now) for an environment with bigger pointers
+ and offsets. */
+# define _POSIX_V7_LPBIG_OFFBIG -1
+# define _POSIX_V6_LPBIG_OFFBIG -1
+# define _XBS5_LPBIG_OFFBIG -1
+
+/* By default we have 64-bit wide `long int', pointers and `off_t'. */
+# define _POSIX_V7_LP64_OFF64 1
+# define _POSIX_V6_LP64_OFF64 1
+# define _XBS5_LP64_OFF64 1
+
+#else /* __WORDSIZE == 32 */
+
+/* RISC-V requires 64-bit off_t
+ # undef _POSIX_V7_ILP32_OFF32
+ # undef _POSIX_V6_ILP32_OFF32
+ # undef _XBS5_ILP32_OFF32
+ */
+
+# define _POSIX_V7_ILP32_OFFBIG 1
+# define _POSIX_V6_ILP32_OFFBIG 1
+# define _XBS5_ILP32_OFFBIG 1
+
+/* We can never provide environments with 64-bit wide pointers. */
+# define _POSIX_V7_LP64_OFF64 -1
+# define _POSIX_V7_LPBIG_OFFBIG -1
+# define _POSIX_V6_LP64_OFF64 -1
+# define _POSIX_V6_LPBIG_OFFBIG -1
+# define _XBS5_LP64_OFF64 -1
+# define _XBS5_LPBIG_OFFBIG -1
+
+/* CFLAGS. */
+#define __ILP32_OFFBIG_CFLAGS "-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
+
+#endif /* __WORDSIZE == 32 */
new file mode 100644
@@ -0,0 +1,36 @@
+/* bits/time64.h -- underlying types for __time64_t. Generic version.
+ Copyright (C) 2019-2020 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _BITS_TYPES_H
+# error "Never include <bits/time64.h> directly; use <sys/types.h> instead."
+#endif
+
+#ifndef _BITS_TIME64_H
+#define _BITS_TIME64_H 1
+
+/* Define __TIME64_T_TYPE so that it is always a 64-bit type. */
+
+#if __WORDSIZE == 64
+/* If we already have 64-bit time type then use it. */
+# define __TIME64_T_TYPE __TIME_T_TYPE
+#else
+/* Define a 64-bit time type alongsize the 32-bit one. */
+# define __TIME64_T_TYPE __SQUAD_TYPE
+#endif
+
+#endif /* bits/time64.h */
new file mode 100644
@@ -0,0 +1,22 @@
+/* Bit size of the time_t type at glibc build time, general case.
+ Copyright (C) 2019-2020 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <bits/wordsize.h>
+
+/* RV32 and RV64 both use 64-bit time_t */
+#define __TIMESIZE 64
new file mode 100644
@@ -0,0 +1,23 @@
+/* Copyright (C) 2019-2020 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <bits/wordsize.h>
+
+#define STAT_IS_KERNEL_STAT 1
+
+#define XSTAT_IS_XSTAT64 1
+#define STATFS_IS_STATFS64 0