iperf3: use -D_GNU_SOURCE to fix build error on musl

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@45103 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/network/utils/iperf3/Makefile b/package/network/utils/iperf3/Makefile
index 3d9c84a..f36b381 100644 (file)
--- a/package/network/utils/iperf3/Makefile
+++ b/package/network/utils/iperf3/Makefile
@@ -30,6 +30,7 @@ define Package/iperf3
   URL:=http://sourceforge.net/projects/iperf/
 endef
 
+TARGET_CFLAGS += -D_GNU_SOURCE
 CONFIGURE_ARGS += --disable-shared
 
 MAKE_FLAGS += noinst_PROGRAMS=