zmqpp: fix build failure

The zmqpp client needs a little help to link against libpthread. Fix build
failures such as the following.

  http://autobuild.buildroot.net/results/d0a/d0a740d4d5414844ca7f2de266fc92223d3d20c8

Signed-off-by: Simon Dawson <spdawson@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

diff --git a/package/zmqpp/zmqpp.mk b/package/zmqpp/zmqpp.mk
index 83e088f27c5094641a490323a22a1ec249ddae63..4c8417fcedf608804eb39de1e50389b8eedd278e 100644 (file)
--- a/package/zmqpp/zmqpp.mk
+++ b/package/zmqpp/zmqpp.mk
@@ -12,6 +12,7 @@ ZMQPP_LICENSE = MIT
 ZMQPP_LICENSE_FILES = LICENSE
 
 ZMQPP_MAKE_OPT = LD="$(TARGET_CXX)" BUILD_PATH=./build PREFIX=/usr
+ZMQPP_LDFLAGS = $(TARGET_LDFLAGS) -lpthread
 
 ifeq ($(BR2_PACKAGE_ZMQPP_CLIENT),y)
 ZMQPP_DEPENDENCIES += boost
@@ -19,6 +20,7 @@ endif
 
 define ZMQPP_BUILD_CMDS
        $(TARGET_MAKE_ENV) $(MAKE) $(TARGET_CONFIGURE_OPTS) \
+               LDFLAGS="$(ZMQPP_LDFLAGS)" \
                $(ZMQPP_MAKE_OPT) $(if $(BR2_PACKAGE_ZMQPP_CLIENT),all) -C $(@D)
 endef