--- cfmu/Makefile.am.link	2012-11-21 23:17:54.000000000 +0100
+++ cfmu/Makefile.am	2013-03-04 21:30:18.715892802 +0100
@@ -7,12 +7,12 @@
 cfmuvalidate_SOURCES = cfmuvalidate.cc cfmuvalidate.hh
 cfmuvalidate_LDADD = ../src/libvfrnav.a @LIBS@ @GTKMM_LIBS@ @GLIBMM_LIBS@ @GIOMM_LIBS@ \
 	@PILOTLINK_LIBS@ @BOOST_LIBS@ @SQLITE3X_LIBS@ @WEBKITGTK_LIBS@
-cfmuvalidate_LDFLAGS = @BOOST_LDFLAGS@
+cfmuvalidate_LDFLAGS = @BOOST_LDFLAGS@ -pthread
 
 cfmuvalidateserver_SOURCES = cfmuvalidateserver.cc cfmuvalidateserver.hh
 cfmuvalidateserver_LDADD = ../src/libvfrnav.a @LIBS@ @GTKMM_LIBS@ @GLIBMM_LIBS@ @GIOMM_LIBS@ \
 	@PILOTLINK_LIBS@ @BOOST_LIBS@ @SQLITE3X_LIBS@ @WEBKITGTK_LIBS@
-cfmuvalidateserver_LDFLAGS = @BOOST_LDFLAGS@
+cfmuvalidateserver_LDFLAGS = @BOOST_LDFLAGS@ -pthread
 
 libcfmuautoroute_a_SOURCES = cfmuautorouteproxy.cc cfmuautorouteproxy.hh
 
@@ -26,7 +26,7 @@
 checkfplan_SOURCES = checkfpl.cc tfr.cc tfr.hh
 checkfplan_LDADD = libcheckfpl.a ../src/libvfrnav.a @LIBS@ @GTKMM_LIBS@ @GLIBMM_LIBS@ \
 	@GIOMM_LIBS@ @PILOTLINK_LIBS@ @BOOST_LIBS@ @SQLITE3X_LIBS@ @LIBXMLPP_LIBS@ @GEOS_LIBS@ @CLIPPER_LIBS@
-checkfplan_LDFLAGS = @BOOST_LDFLAGS@ @GEOS_LDFLAGS@ @CLIPPER_LDFLAGS@
+checkfplan_LDFLAGS = @BOOST_LDFLAGS@ @GEOS_LDFLAGS@ @CLIPPER_LDFLAGS@ -pthread
 
 AM_CPPFLAGS = @CXXFLAGS@ @GTKMM_CFLAGS@ @GLIBMM_CFLAGS@ @GIOMM_CFLAGS@ @SQLITE_CFLAGS@ \
 	@SQLITE3X_CFLAGS@ @ZFSTREAM_CFLAGS@ @PILOTLINK_CFLAGS@ @BOOST_CPPFLAGS@ \