New upstream version 1.3.8.

New tool: nbdcopy
Add upstream patch to fix compilation with glibc from Rawhide.

0001-lib-utils.c-Use-strerrordesc_np-as-alternative-in-as.patch

@@ -0,0 +1,96 @@
+From 814e597c4ed49ca59b8f24a5f16a487409a4804e Mon Sep 17 00:00:00 2001
+From: "Richard W.M. Jones" <rjones@redhat.com>
+Date: Fri, 17 Jul 2020 12:35:59 +0100
+Subject: [PATCH] lib/utils.c: Use strerrordesc_np as alternative in async-safe
+ perror.
+
+See:
+https://lists.fedoraproject.org/archives/list/glibc@lists.fedoraproject.org/thread/WJHGG2OO7ABNAYICGA5WQZ2Q34Q2FEHU/
+
+Thanks: Florian Weimer
+---
+ configure.ac |  5 +++++
+ lib/utils.c  | 31 +++++++++++++++++++------------
+ 2 files changed, 24 insertions(+), 12 deletions(-)
+
+diff --git a/configure.ac b/configure.ac
+index e5c29cd..a44e3b1 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -79,6 +79,11 @@ AC_CHECK_HEADERS([\
+ 
+ AC_CHECK_HEADERS([linux/vm_sockets.h], [], [], [#include <sys/socket.h>])
+ 
++dnl Check for strerrordesc_np (optional, glibc only).
++dnl Prefer this over sys_errlist.
++dnl https://lists.fedoraproject.org/archives/list/glibc@lists.fedoraproject.org/thread/WJHGG2OO7ABNAYICGA5WQZ2Q34Q2FEHU/
++AC_CHECK_FUNCS([strerrordesc_np])
++
+ dnl Check for sys_errlist (optional).
+ AC_MSG_CHECKING([for sys_errlist])
+ AC_TRY_LINK([], [extern int sys_errlist; char *p = &sys_errlist;], [
+diff --git a/lib/utils.c b/lib/utils.c
+index bc62f93..86e9849 100644
+--- a/lib/utils.c
++++ b/lib/utils.c
+@@ -136,6 +136,11 @@ nbd_internal_fork_safe_itoa (long v, char *buf, size_t bufsize)
+   return &buf[i];
+ }
+ 
++#if defined(__GNUC__)
++#pragma GCC diagnostic push
++#pragma GCC diagnostic ignored "-Wunused-result"
++#endif
++
+ /* Fork-safe version of perror.  ONLY use this after fork and before
+  * exec, the rest of the time use set_error().
+  */
+@@ -143,24 +148,22 @@ void
+ nbd_internal_fork_safe_perror (const char *s)
+ {
+   const int err = errno;
++  const char *m = NULL;
++  char buf[32];
+ 
+-#if defined(__GNUC__)
+-#pragma GCC diagnostic push
+-#pragma GCC diagnostic ignored "-Wunused-result"
+-#endif
+   write (2, s, strlen (s));
+   write (2, ": ", 2);
+-#if HAVE_SYS_ERRLIST
+-  write (2, sys_errlist[errno], strlen (sys_errlist[errno]));
++#ifdef HAVE_STRERRORDESC_NP
++  m = strerrordesc_np (errno);
+ #else
+-  char buf[32];
+-  const char *v = nbd_internal_fork_safe_itoa ((long) errno, buf, sizeof buf);
+-  write (2, v, strlen (v));
++#ifdef HAVE_SYS_ERRLIST
++  m = errno >= 0 && errno < sys_nerr ? sys_errlist[errno] : NULL;
+ #endif
++#endif
++  if (!m)
++    m = nbd_internal_fork_safe_itoa ((long) errno, buf, sizeof buf);
++  write (2, m, strlen (m));
+   write (2, "\n", 1);
+-#if defined(__GNUC__)
+-#pragma GCC diagnostic pop
+-#endif
+ 
+   /* Restore original errno in case it was disturbed by the system
+    * calls above.
+@@ -168,6 +171,10 @@ nbd_internal_fork_safe_perror (const char *s)
+   errno = err;
+ }
+ 
++#if defined(__GNUC__)
++#pragma GCC diagnostic pop
++#endif
++
+ /* nbd_internal_printable_* functions are used by the API code to
+  * print debug messages when we trace calls in and out of libnbd.  The
+  * calls should attempt to convert the parameter into something
+-- 
+2.27.0
+

libnbd.spec

@@ -2,14 +2,14 @@
 %global verify_tarball_signature 1
 
 # If there are patches which touch autotools files, set this to 1.
-%global patches_touch_autotools %{nil}
+%global patches_touch_autotools 1
 
 # The source directory.
 %global source_directory 1.3-development
 
 Name:           libnbd
 Version:        1.3.8
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        NBD client library in userspace
 
 License:        LGPLv2+
@@ -22,6 +22,8 @@ Source1:        http://libguestfs.org/download/libnbd/%{source_directory}/%{name
 # https://pgp.key-server.io/pks/lookup?search=rjones%40redhat.com&fingerprint=on&op=vindex
 Source2:       libguestfs.keyring
 
+Patch1:        0001-lib-utils.c-Use-strerrordesc_np-as-alternative-in-as.patch
+
 %if 0%{patches_touch_autotools}
 BuildRequires: autoconf, automake, libtool
 %endif
@@ -282,9 +284,10 @@ make %{?_smp_mflags} check || {
 
 
 %changelog
-* Fri Jul 17 2020 Richard W.M. Jones <rjones@redhat.com> - 1.3.8-1
+* Fri Jul 17 2020 Richard W.M. Jones <rjones@redhat.com> - 1.3.8-2
 - New upstream version 1.3.8.
 - New tool: nbdcopy
+- Add upstream patch to fix compilation with glibc from Rawhide.
 
 * Tue May 26 2020 Miro Hrončok <mhroncok@redhat.com> - 1.3.7-3
 - Rebuilt for Python 3.9