up to 3.16

- add patch for linking libatomic on archs without 64-bit atomics
  (submitted upstream: esnet/iperf#1612)

iperf3.spec

@@ -4,19 +4,24 @@
 Summary:	Network performance measurement tool
 Summary(pl.UTF-8):	Narzędzie do szacowania wydajności sieci
 Name:		iperf3
-Version:	3.15
+Version:	3.16
 Release:	1
 License:	BSD-like
 Group:		Networking/Utilities
 Source0:	https://downloads.es.net/pub/iperf/%{orgname}-%{version}.tar.gz
-# Source0-md5:	63d4ceef1768c13af563ce92cfdd41fa
+# Source0-md5:	cbcdeae143cbd82a1f41a80ed01ede6c
+Patch0:		link-libatomic.patch
 URL:		https://software.es.net/iperf/
 BuildRequires:	autoconf >= 2.71
 BuildRequires:	automake
+%ifnarch %arch_with_atomics64
+BuildRequires:	libatomic-devel
+%endif
 BuildRequires:	libsctp-devel
 BuildRequires:	libtool
 BuildRequires:	linux-libc-headers >= 7:3.13
 BuildRequires:	openssl-devel
+BuildRequires:	rpmbuild(macros) >= 2.025
 Requires:	%{name}-libs = %{version}-%{release}
 BuildRoot:	%{tmpdir}/%{name}-%{version}-root-%(id -u -n)
 
@@ -56,6 +61,7 @@ Pliki nagłówkowe bibliotek iperf3.
 
 %prep
 %setup -q -n %{orgname}-%{version}
+%patch0 -p1
 
 %build
 %{__libtoolize}

link-libatomic.patch

@@ -0,0 +1,36 @@
+From 1511e9f85b548891ea53d4e378903344df1fd31e Mon Sep 17 00:00:00 2001
+From: Jan Palus <jpalus@fastmail.com>
+Date: Sun, 3 Dec 2023 12:14:05 +0100
+Subject: [PATCH] Check and link libatomic if needed
+
+Some architectures without native support for 64-bit atomics need
+linking with libatomic.
+---
+ configure.ac | 14 +++++++++++++-
+ 1 file changed, 13 insertions(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+index 2594b395e..ad7eaf120 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -92,7 +92,19 @@ CXX="$PTHREAD_CXX"
+ ])
+
+ # Atomics
+-AC_CHECK_HEADERS([stdatomic.h])
++AC_CHECK_HEADERS([stdatomic.h],
++    [AC_MSG_CHECKING([whether libatomic is required])
++    AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdatomic.h>]], [[atomic_uint_fast64_t i; i++;]])],
++        [AC_MSG_RESULT([no])],
++        [save_LIBS="$LIBS"
++        LIBS="$LIBS -latomic"
++        AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdatomic.h>]], [[atomic_uint_fast64_t i; i++;]])],
++            [AC_MSG_RESULT([yes])],
++            [AC_MSG_ERROR([failed to find working configuration with atomics])]
++        )]
++    )],
++    []
++)
+
+ # Check for poll.h (it's in POSIX so everyone should have it?)
+ AC_CHECK_HEADERS([poll.h])