app-arch/gzip: fix build failure against glibc-2.28, bug #663928

Adopted gnulib's upstream patch:
http://git.savannah.gnu.org/gitweb/?p=gnulib.git;a=commitdiff;h=4af4a4a71827c0bc5e0ec67af23edef4f15cee8e

Closes: https://bugs.gentoo.org/663928
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Package-Manager: Portage-2.3.51, Repoman-2.3.11

2 files changed, 135 insertions, 0 deletions

diff --git a/app-arch/gzip/files/gzip-1.9-gnulib-glibc-2.28.patch b/app-arch/gzip/files/gzip-1.9-gnulib-glibc-2.28.patch
new file mode 100644
index 000000000000..20039b9f0d2c
--- /dev/null
+++ b/app-arch/gzip/files/gzip-1.9-gnulib-glibc-2.28.patch
@@ -0,0 +1,134 @@
+fix build failure against glibc-2.28
+
+https://bugs.gentoo.org/663928
+
+Adopted gnulib's upstream patch:
+
+From 4af4a4a71827c0bc5e0ec67af23edef4f15cee8e Mon Sep 17 00:00:00 2001
+From: Paul Eggert <eggert@cs.ucla.edu>
+Date: Mon, 5 Mar 2018 10:56:29 -0800
+Subject: [PATCH] fflush: adjust to glibc 2.28 libio.h removal
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Problem reported by Daniel P. Berrangé in:
+https://lists.gnu.org/r/bug-gnulib/2018-03/msg00000.html
+* lib/fflush.c (clear_ungetc_buffer_preserving_position)
+(disable_seek_optimization, rpl_fflush):
+* lib/fpurge.c (fpurge):
+* lib/freadahead.c (freadahead):
+* lib/freading.c (freading):
+* lib/fseeko.c (fseeko):
+* lib/fseterr.c (fseterr):
+Check _IO_EOF_SEEN instead of _IO_ftrylockfile.
+* lib/stdio-impl.h (_IO_IN_BACKUP) [_IO_EOF_SEEN]:
+Define if not already defined.
+---
+ lib/fflush.c     |  6 +++---
+ lib/fpurge.c     |  2 +-
+ lib/freading.c   |  2 +-
+ lib/fseeko.c     |  4 ++--
+ lib/fseterr.c    |  2 +-
+ lib/stdio-impl.h |  6 ++++++
+
+--- a/lib/fflush.c
++++ b/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, Minix 3, 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);
+ 
+--- a/lib/fpurge.c
++++ b/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.  */
+--- a/lib/freading.c
++++ b/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));
+--- a/lib/fseeko.c
++++ b/lib/fseeko.c
+@@ -47,7 +47,7 @@ fseeko (FILE *fp, off_t offset, int whence)
+ #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 whence)
+           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__
+--- a/lib/fseterr.c
++++ b/lib/fseterr.c
+@@ -29,7 +29,7 @@ fseterr (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->_flags |= _IO_ERR_SEEN;
+ #elif defined __sferror || defined __DragonFly__ || defined __ANDROID__
+   /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin, Minix 3, Android */
+--- a/lib/stdio-impl.h
++++ b/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.  */
+ 
+-- 
+2.19.1
+
diff --git a/app-arch/gzip/gzip-1.9.ebuild b/app-arch/gzip/gzip-1.9.ebuild
index d8bd176b4eaf..8b9d2dcb48b2 100644
--- a/app-arch/gzip/gzip-1.9.ebuild
+++ b/app-arch/gzip/gzip-1.9.ebuild
@@ -18,6 +18,7 @@ IUSE="pic static"
 
 PATCHES=(
 	"${FILESDIR}/${PN}-1.3.8-install-symlinks.patch"
+	"${FILESDIR}/${PN}-1.9-gnulib-glibc-2.28.patch"
 )
 
 src_configure() {