diff mbox series

[rocko] m4: Workaround gnulib's fseeko.c implementation

Message ID 20181114132336.71049-1-raphael.kubo.da.costa@intel.com
State Superseded
Headers show
Series [rocko] m4: Workaround gnulib's fseeko.c implementation | expand

Commit Message

Raphael Kubo da Costa Nov. 14, 2018, 1:23 p.m. UTC
From: Khem Raj <raj.khem@gmail.com>


exposed by glibc 2.28 for details see
https://lists.gnu.org/r/bug-gnulib/2018-03/msg00000.html

(From OE-Core rev: acca7f964bf9c21f3777085563a7928b8246f17f)

Signed-off-by: Khem Raj <raj.khem@gmail.com>

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

Signed-off-by: Raphael Kubo da Costa <raphael.kubo.da.costa@intel.com>

---
 meta/recipes-devtools/m4/m4-1.4.18.inc        |   1 +
 .../m4-1.4.18-glibc-change-work-around.patch  | 129 ++++++++++++++++++
 2 files changed, 130 insertions(+)
 create mode 100644 meta/recipes-devtools/m4/m4/m4-1.4.18-glibc-change-work-around.patch

-- 
2.19.1

-- 
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Comments

Armin Kuster Nov. 14, 2018, 4:22 p.m. UTC | #1
On 11/14/18 5:23 AM, Raphael Kubo da Costa wrote:
> From: Khem Raj <raj.khem@gmail.com>

>

> exposed by glibc 2.28 for details see

> https://lists.gnu.org/r/bug-gnulib/2018-03/msg00000.html

>

> (From OE-Core rev: acca7f964bf9c21f3777085563a7928b8246f17f)

>

> Signed-off-by: Khem Raj <raj.khem@gmail.com>

> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

> Signed-off-by: Raphael Kubo da Costa <raphael.kubo.da.costa@intel.com>


in in stable/rocko-nmut. Odd thing it, this is not in patchwork but the
sumo version is.

Thanks,

Armin

> ---

>  meta/recipes-devtools/m4/m4-1.4.18.inc        |   1 +

>  .../m4-1.4.18-glibc-change-work-around.patch  | 129 ++++++++++++++++++

>  2 files changed, 130 insertions(+)

>  create mode 100644 meta/recipes-devtools/m4/m4/m4-1.4.18-glibc-change-work-around.patch

>

> diff --git a/meta/recipes-devtools/m4/m4-1.4.18.inc b/meta/recipes-devtools/m4/m4-1.4.18.inc

> index d7c8648577..1bce097c60 100644

> --- a/meta/recipes-devtools/m4/m4-1.4.18.inc

> +++ b/meta/recipes-devtools/m4/m4-1.4.18.inc

> @@ -9,6 +9,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=d32239bcb673463ab874e80d47fae504\

>  

>  SRC_URI += "file://ac_config_links.patch \

>              file://remove-gets.patch \

> +            file://m4-1.4.18-glibc-change-work-around.patch \

>             "

>  

>  SRC_URI_append_class-target = "\

> diff --git a/meta/recipes-devtools/m4/m4/m4-1.4.18-glibc-change-work-around.patch b/meta/recipes-devtools/m4/m4/m4-1.4.18-glibc-change-work-around.patch

> new file mode 100644

> index 0000000000..72e7ae2080

> --- /dev/null

> +++ b/meta/recipes-devtools/m4/m4/m4-1.4.18-glibc-change-work-around.patch

> @@ -0,0 +1,129 @@

> +update for glibc libio.h removal in 2.28+

> +

> +see

> +https://src.fedoraproject.org/rpms/m4/c/814d592134fad36df757f9a61422d164ea2c6c9b?branch=master

> +

> +Upstream-Status: Pending

> +Signed-off-by: Khem Raj <raj.khem@gmail.com>

> +Index: m4-1.4.18/lib/fflush.c

> +===================================================================

> +--- m4-1.4.18.orig/lib/fflush.c

> ++++ m4-1.4.18/lib/fflush.c

> +@@ -33,7 +33,7 @@

> + #undef fflush

> + 

> + 

> +-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */

> ++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */

> + 

> + /* Clear the stream's ungetc buffer, preserving the value of ftello (fp).  */

> + static void

> +@@ -72,7 +72,7 @@ clear_ungetc_buffer (FILE *fp)

> + 

> + #endif

> + 

> +-#if ! (defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */)

> ++#if ! (defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */)

> + 

> + # if (defined __sferror || defined __DragonFly__ || defined __ANDROID__) && defined __SNPT

> + /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin, Android */

> +@@ -148,7 +148,7 @@ rpl_fflush (FILE *stream)

> +   if (stream == NULL || ! freading (stream))

> +     return fflush (stream);

> + 

> +-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */

> ++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */

> + 

> +   clear_ungetc_buffer_preserving_position (stream);

> + 

> +Index: m4-1.4.18/lib/fpending.c

> +===================================================================

> +--- m4-1.4.18.orig/lib/fpending.c

> ++++ m4-1.4.18/lib/fpending.c

> +@@ -32,7 +32,7 @@ __fpending (FILE *fp)

> +   /* Most systems provide FILE as a struct and the necessary bitmask in

> +      <stdio.h>, because they need it for implementing getc() and putc() as

> +      fast macros.  */

> +-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */

> ++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */

> +   return fp->_IO_write_ptr - fp->_IO_write_base;

> + #elif defined __sferror || defined __DragonFly__ || defined __ANDROID__

> +   /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin, Android */

> +Index: m4-1.4.18/lib/fpurge.c

> +===================================================================

> +--- m4-1.4.18.orig/lib/fpurge.c

> ++++ m4-1.4.18/lib/fpurge.c

> +@@ -62,7 +62,7 @@ fpurge (FILE *fp)

> +   /* Most systems provide FILE as a struct and the necessary bitmask in

> +      <stdio.h>, because they need it for implementing getc() and putc() as

> +      fast macros.  */

> +-# if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */

> ++# if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */

> +   fp->_IO_read_end = fp->_IO_read_ptr;

> +   fp->_IO_write_ptr = fp->_IO_write_base;

> +   /* Avoid memory leak when there is an active ungetc buffer.  */

> +Index: m4-1.4.18/lib/freadahead.c

> +===================================================================

> +--- m4-1.4.18.orig/lib/freadahead.c

> ++++ m4-1.4.18/lib/freadahead.c

> +@@ -25,7 +25,7 @@

> + size_t

> + freadahead (FILE *fp)

> + {

> +-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */

> ++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */

> +   if (fp->_IO_write_ptr > fp->_IO_write_base)

> +     return 0;

> +   return (fp->_IO_read_end - fp->_IO_read_ptr)

> +Index: m4-1.4.18/lib/freading.c

> +===================================================================

> +--- m4-1.4.18.orig/lib/freading.c

> ++++ m4-1.4.18/lib/freading.c

> +@@ -31,7 +31,7 @@ freading (FILE *fp)

> +   /* Most systems provide FILE as a struct and the necessary bitmask in

> +      <stdio.h>, because they need it for implementing getc() and putc() as

> +      fast macros.  */

> +-# if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */

> ++# if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */

> +   return ((fp->_flags & _IO_NO_WRITES) != 0

> +           || ((fp->_flags & (_IO_NO_READS | _IO_CURRENTLY_PUTTING)) == 0

> +               && fp->_IO_read_base != NULL));

> +Index: m4-1.4.18/lib/fseeko.c

> +===================================================================

> +--- m4-1.4.18.orig/lib/fseeko.c

> ++++ m4-1.4.18/lib/fseeko.c

> +@@ -47,7 +47,7 @@ fseeko (FILE *fp, off_t offset, int when

> + #endif

> + 

> +   /* These tests are based on fpurge.c.  */

> +-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */

> ++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */

> +   if (fp->_IO_read_end == fp->_IO_read_ptr

> +       && fp->_IO_write_ptr == fp->_IO_write_base

> +       && fp->_IO_save_base == NULL)

> +@@ -123,7 +123,7 @@ fseeko (FILE *fp, off_t offset, int when

> +           return -1;

> +         }

> + 

> +-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */

> ++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */

> +       fp->_flags &= ~_IO_EOF_SEEN;

> +       fp->_offset = pos;

> + #elif defined __sferror || defined __DragonFly__ || defined __ANDROID__

> +Index: m4-1.4.18/lib/stdio-impl.h

> +===================================================================

> +--- m4-1.4.18.orig/lib/stdio-impl.h

> ++++ m4-1.4.18/lib/stdio-impl.h

> +@@ -18,6 +18,12 @@

> +    the same implementation of stdio extension API, except that some fields

> +    have different naming conventions, or their access requires some casts.  */

> + 

> ++/* Glibc 2.28 made _IO_IN_BACKUP private.  For now, work around this

> ++   problem by defining it ourselves.  FIXME: Do not rely on glibc

> ++   internals.  */

> ++#if !defined _IO_IN_BACKUP && defined _IO_EOF_SEEN

> ++# define _IO_IN_BACKUP 0x100

> ++#endif

> + 

> + /* BSD stdio derived implementations.  */

> + 

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Raphael Kubo da Costa Nov. 16, 2018, 3:51 p.m. UTC | #2
akuster808 <akuster808@gmail.com> writes:

> On 11/14/18 5:23 AM, Raphael Kubo da Costa wrote:

>

>> From: Khem Raj <raj.khem@gmail.com>

>>

>> exposed by glibc 2.28 for details see

>> https://lists.gnu.org/r/bug-gnulib/2018-03/msg00000.html

>>

>> (From OE-Core rev: acca7f964bf9c21f3777085563a7928b8246f17f)

>>

>> Signed-off-by: Khem Raj <raj.khem@gmail.com>

>> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

>> Signed-off-by: Raphael Kubo da Costa <raphael.kubo.da.costa@intel.com>

>

> in in stable/rocko-nmut. Odd thing it, this is not in patchwork but the

> sumo version is.


Thanks. I need a few more patches to get host tools to build here on
Fedora 29, but now I'm even more confused as to where to send them :-)

What's the relationship between the -next, -nmut and -nmut2 branches in
Yocto's poky-contrib? How do they interact with oe-core's -next
branches? And what's the process for merging them into the actual stable
branches?
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Khem Raj Nov. 16, 2018, 5:05 p.m. UTC | #3
On Fri, Nov 16, 2018 at 7:51 AM Raphael Kubo da Costa
<raphael.kubo.da.costa@intel.com> wrote:
>

> akuster808 <akuster808@gmail.com> writes:

>

> > On 11/14/18 5:23 AM, Raphael Kubo da Costa wrote:

> >

> >> From: Khem Raj <raj.khem@gmail.com>

> >>

> >> exposed by glibc 2.28 for details see

> >> https://lists.gnu.org/r/bug-gnulib/2018-03/msg00000.html

> >>

> >> (From OE-Core rev: acca7f964bf9c21f3777085563a7928b8246f17f)

> >>

> >> Signed-off-by: Khem Raj <raj.khem@gmail.com>

> >> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

> >> Signed-off-by: Raphael Kubo da Costa <raphael.kubo.da.costa@intel.com>

> >

> > in in stable/rocko-nmut. Odd thing it, this is not in patchwork but the

> > sumo version is.

>

> Thanks. I need a few more patches to get host tools to build here on

> Fedora 29, but now I'm even more confused as to where to send them :-)

>

> What's the relationship between the -next, -nmut and -nmut2 branches in

> Yocto's poky-contrib? How do they interact with oe-core's -next

> branches? And what's the process for merging them into the actual stable

> branches?


they are staging private branches used by maintainers. Eventually they
should show up in <release>-next
and then into <release> branch

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> http://lists.openembedded.org/mailman/listinfo/openembedded-core

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Raphael Kubo da Costa Nov. 16, 2018, 5:16 p.m. UTC | #4
On Fri, 2018-11-16 at 09:05 -0800, Khem Raj wrote:
> On Fri, Nov 16, 2018 at 7:51 AM Raphael Kubo da Costa

> <raphael.kubo.da.costa@intel.com> wrote:

> > What's the relationship between the -next, -nmut and -nmut2

> > branches in Yocto's poky-contrib? How do they interact with oe-

> > core's -next branches? And what's the process for merging them into

> > the actual stable branches?

> 

> they are staging private branches used by maintainers. Eventually

> they should show up in <release>-next and then into <release> branch


Right, and how do I know which and whose branch(es) to check for before
sending a backport (or even to track in case I just want things to work
locally)?
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Ross Burton Nov. 16, 2018, 5:22 p.m. UTC | #5
On Fri, 16 Nov 2018 at 17:16, Kubo Da Costa, Raphael
<raphael.kubo.da.costa@intel.com> wrote:
> On Fri, 2018-11-16 at 09:05 -0800, Khem Raj wrote:

> > On Fri, Nov 16, 2018 at 7:51 AM Raphael Kubo da Costa

> > <raphael.kubo.da.costa@intel.com> wrote:

> > > What's the relationship between the -next, -nmut and -nmut2

> > > branches in Yocto's poky-contrib? How do they interact with oe-

> > > core's -next branches? And what's the process for merging them into

> > > the actual stable branches?

> >

> > they are staging private branches used by maintainers. Eventually

> > they should show up in <release>-next and then into <release> branch

>

> Right, and how do I know which and whose branch(es) to check for before

> sending a backport (or even to track in case I just want things to work

> locally)?


You can be excused for not checking the maintainer's private branches,
so just check the release branch.  If there's a patch in one the
maintainer may point it out to keep you informed, feel free to review
it to verify what is scheduled to be merged is complete.

Ross
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Khem Raj Nov. 16, 2018, 5:48 p.m. UTC | #6
On Fri, Nov 16, 2018 at 9:16 AM Kubo Da Costa, Raphael
<raphael.kubo.da.costa@intel.com> wrote:
>

> On Fri, 2018-11-16 at 09:05 -0800, Khem Raj wrote:

> > On Fri, Nov 16, 2018 at 7:51 AM Raphael Kubo da Costa

> > <raphael.kubo.da.costa@intel.com> wrote:

> > > What's the relationship between the -next, -nmut and -nmut2

> > > branches in Yocto's poky-contrib? How do they interact with oe-

> > > core's -next branches? And what's the process for merging them into

> > > the actual stable branches?

> >

> > they are staging private branches used by maintainers. Eventually

> > they should show up in <release>-next and then into <release> branch

>

> Right, and how do I know which and whose branch(es) to check for before

> sending a backport (or even to track in case I just want things to work

> locally)?


thats just the maintainers process and usually leave them to do that.
just tracking
-next is probably better unless I want to be nosy :), maintainers
replying to an email
pointing to the pvt branch is sheer out of love to let you know where
the patch stands
as of now.
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diff mbox series

Patch

diff --git a/meta/recipes-devtools/m4/m4-1.4.18.inc b/meta/recipes-devtools/m4/m4-1.4.18.inc
index d7c8648577..1bce097c60 100644
--- a/meta/recipes-devtools/m4/m4-1.4.18.inc
+++ b/meta/recipes-devtools/m4/m4-1.4.18.inc
@@ -9,6 +9,7 @@  LIC_FILES_CHKSUM = "file://COPYING;md5=d32239bcb673463ab874e80d47fae504\
 
 SRC_URI += "file://ac_config_links.patch \
             file://remove-gets.patch \
+            file://m4-1.4.18-glibc-change-work-around.patch \
            "
 
 SRC_URI_append_class-target = "\
diff --git a/meta/recipes-devtools/m4/m4/m4-1.4.18-glibc-change-work-around.patch b/meta/recipes-devtools/m4/m4/m4-1.4.18-glibc-change-work-around.patch
new file mode 100644
index 0000000000..72e7ae2080
--- /dev/null
+++ b/meta/recipes-devtools/m4/m4/m4-1.4.18-glibc-change-work-around.patch
@@ -0,0 +1,129 @@ 
+update for glibc libio.h removal in 2.28+
+
+see
+https://src.fedoraproject.org/rpms/m4/c/814d592134fad36df757f9a61422d164ea2c6c9b?branch=master
+
+Upstream-Status: Pending
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+Index: m4-1.4.18/lib/fflush.c
+===================================================================
+--- m4-1.4.18.orig/lib/fflush.c
++++ m4-1.4.18/lib/fflush.c
+@@ -33,7 +33,7 @@
+ #undef fflush
+ 
+ 
+-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+ 
+ /* Clear the stream's ungetc buffer, preserving the value of ftello (fp).  */
+ static void
+@@ -72,7 +72,7 @@ clear_ungetc_buffer (FILE *fp)
+ 
+ #endif
+ 
+-#if ! (defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */)
++#if ! (defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */)
+ 
+ # if (defined __sferror || defined __DragonFly__ || defined __ANDROID__) && defined __SNPT
+ /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin, Android */
+@@ -148,7 +148,7 @@ rpl_fflush (FILE *stream)
+   if (stream == NULL || ! freading (stream))
+     return fflush (stream);
+ 
+-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+ 
+   clear_ungetc_buffer_preserving_position (stream);
+ 
+Index: m4-1.4.18/lib/fpending.c
+===================================================================
+--- m4-1.4.18.orig/lib/fpending.c
++++ m4-1.4.18/lib/fpending.c
+@@ -32,7 +32,7 @@ __fpending (FILE *fp)
+   /* Most systems provide FILE as a struct and the necessary bitmask in
+      <stdio.h>, because they need it for implementing getc() and putc() as
+      fast macros.  */
+-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+   return fp->_IO_write_ptr - fp->_IO_write_base;
+ #elif defined __sferror || defined __DragonFly__ || defined __ANDROID__
+   /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin, Android */
+Index: m4-1.4.18/lib/fpurge.c
+===================================================================
+--- m4-1.4.18.orig/lib/fpurge.c
++++ m4-1.4.18/lib/fpurge.c
+@@ -62,7 +62,7 @@ fpurge (FILE *fp)
+   /* Most systems provide FILE as a struct and the necessary bitmask in
+      <stdio.h>, because they need it for implementing getc() and putc() as
+      fast macros.  */
+-# if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
++# if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+   fp->_IO_read_end = fp->_IO_read_ptr;
+   fp->_IO_write_ptr = fp->_IO_write_base;
+   /* Avoid memory leak when there is an active ungetc buffer.  */
+Index: m4-1.4.18/lib/freadahead.c
+===================================================================
+--- m4-1.4.18.orig/lib/freadahead.c
++++ m4-1.4.18/lib/freadahead.c
+@@ -25,7 +25,7 @@
+ size_t
+ freadahead (FILE *fp)
+ {
+-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+   if (fp->_IO_write_ptr > fp->_IO_write_base)
+     return 0;
+   return (fp->_IO_read_end - fp->_IO_read_ptr)
+Index: m4-1.4.18/lib/freading.c
+===================================================================
+--- m4-1.4.18.orig/lib/freading.c
++++ m4-1.4.18/lib/freading.c
+@@ -31,7 +31,7 @@ freading (FILE *fp)
+   /* Most systems provide FILE as a struct and the necessary bitmask in
+      <stdio.h>, because they need it for implementing getc() and putc() as
+      fast macros.  */
+-# if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
++# if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+   return ((fp->_flags & _IO_NO_WRITES) != 0
+           || ((fp->_flags & (_IO_NO_READS | _IO_CURRENTLY_PUTTING)) == 0
+               && fp->_IO_read_base != NULL));
+Index: m4-1.4.18/lib/fseeko.c
+===================================================================
+--- m4-1.4.18.orig/lib/fseeko.c
++++ m4-1.4.18/lib/fseeko.c
+@@ -47,7 +47,7 @@ fseeko (FILE *fp, off_t offset, int when
+ #endif
+ 
+   /* These tests are based on fpurge.c.  */
+-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+   if (fp->_IO_read_end == fp->_IO_read_ptr
+       && fp->_IO_write_ptr == fp->_IO_write_base
+       && fp->_IO_save_base == NULL)
+@@ -123,7 +123,7 @@ fseeko (FILE *fp, off_t offset, int when
+           return -1;
+         }
+ 
+-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+       fp->_flags &= ~_IO_EOF_SEEN;
+       fp->_offset = pos;
+ #elif defined __sferror || defined __DragonFly__ || defined __ANDROID__
+Index: m4-1.4.18/lib/stdio-impl.h
+===================================================================
+--- m4-1.4.18.orig/lib/stdio-impl.h
++++ m4-1.4.18/lib/stdio-impl.h
+@@ -18,6 +18,12 @@
+    the same implementation of stdio extension API, except that some fields
+    have different naming conventions, or their access requires some casts.  */
+ 
++/* Glibc 2.28 made _IO_IN_BACKUP private.  For now, work around this
++   problem by defining it ourselves.  FIXME: Do not rely on glibc
++   internals.  */
++#if !defined _IO_IN_BACKUP && defined _IO_EOF_SEEN
++# define _IO_IN_BACKUP 0x100
++#endif
+ 
+ /* BSD stdio derived implementations.  */
+