[iperf] Bump to v3.21

I/iperf/build_tarballs.jl

@@ -1,24 +1,30 @@
 # Note that this script can accept some limited command-line arguments, run
 # `julia build_tarballs.jl --help` to see a usage message.
-using BinaryBuilder
+using BinaryBuilder, Pkg
+
+const YGGDRASIL_DIR = "../.."
+include(joinpath(YGGDRASIL_DIR, "platforms", "macos_sdks.jl"))
 
 name = "iperf"
-version = v"3.7.0"
+version = v"3.21"
 
 # Collection of sources required to complete build
 sources = [
-    "https://github.com/esnet/iperf/archive/3.7.tar.gz" =>
-    "c349924a777e8f0a70612b765e26b8b94cc4a97cc21a80ed260f65e9823c8fc5",
+    ArchiveSource("https://github.com/esnet/iperf/releases/download/$(version.major).$(version.minor)/iperf-$(version.major).$(version.minor).tar.gz", "656e4405ebd620121de7ceca3eaf43a88f79ea1b857d041a6a0b1314801acdd8"),
+    DirectorySource("./bundled"),
 ]
 
 # Bash recipe for building across all platforms
 script = raw"""
 cd $WORKSPACE/srcdir/iperf-*
+atomic_patch -p1 $WORKSPACE/srcdir/patches/0001-use-uint64_t-for-atomic-fallback.patch # work around https://github.com/esnet/iperf/issues/2060
 ./configure --prefix=${prefix} --build=${MACHTYPE} --host=${target} --disable-profiling
 make -j${nproc}
 make install
 """
 
+sources, script = require_macos_sdk("10.13", sources, script)
+
 # These are the platforms we will build for by default, unless further
 # platforms are passed in on the command line
 platforms = filter(!Sys.iswindows, supported_platforms())
@@ -34,4 +40,4 @@ dependencies = [
 ]
 
 # Build the tarballs, and possibly a `build.jl` as well.
-build_tarballs(ARGS, name, version, sources, script, platforms, products, dependencies)
+build_tarballs(ARGS, name, version, sources, script, platforms, products, dependencies; julia_compat="1.6")

I/iperf/bundled/patches/0001-use-uint64_t-for-atomic-fallback.patch

@@ -0,0 +1,13 @@
+diff --git a/src/iperf_api.h b/src/iperf_api.h
+index XXXXXXX..YYYYYYY 100644
+--- a/src/iperf_api.h
++++ b/src/iperf_api.h
+@@ -44,8 +44,9 @@
+ #ifdef HAVE_STDATOMIC_H
+ #include <stdatomic.h>
+ #else
+ #warning "No <stdatomic.h> available"
+-typedef u_int64_t atomic_uint_fast64_t;
++#include <stdint.h>
++typedef uint64_t atomic_uint_fast64_t;
+ #endif // HAVE_STDATOMIC_H