Fix multithreading flags in the example servers

examples/src/Makefile.am

@@ -1,21 +1,21 @@
+if MULTITHREADING
+MT_LDADD = -lpthread
+else
+MT_LDADD =
+endif
 
 bin_PROGRAMS= $(top_builddir)/bin/exampleServer $(top_builddir)/bin/exampleServerMT $(top_builddir)/bin/exampleServerACPLT
 #__top_builddir__bin_exampleServer_LDFLAGS = -all-static
 __top_builddir__bin_exampleServer_CFLAGS = -I$(top_builddir)/src -I$(top_builddir)/include
 __top_builddir__bin_exampleServer_SOURCES = opcuaServer.c networklayer.c
-__top_builddir__bin_exampleServer_LDADD= $(top_builddir)/lib/libopen62541.a
+__top_builddir__bin_exampleServer_LDADD= $(top_builddir)/lib/libopen62541.a $(MT_LDADD)
 
 __top_builddir__bin_exampleServerMT_CFLAGS = -I$(top_builddir)/src -I$(top_builddir)/include
 __top_builddir__bin_exampleServerMT_SOURCES = opcuaServerMT.c networklayer.c
-if MULTITHREADING
-MT_LDADD = -lpthread
-else
-MT_LDADD =
-endif
 __top_builddir__bin_exampleServerMT_LDADD= $(top_builddir)/lib/libopen62541.a $(MT_LDADD)
 
 __top_builddir__bin_exampleServerACPLT_CFLAGS = -I$(top_builddir)/src -I$(top_builddir)/include
 __top_builddir__bin_exampleServerACPLT_SOURCES = opcuaServerACPLT.c 
-__top_builddir__bin_exampleServerACPLT_LDADD= $(top_builddir)/lib/libopen62541.a
+__top_builddir__bin_exampleServerACPLT_LDADD= $(top_builddir)/lib/libopen62541.a $(MT_LDADD)
 
 AM_CFLAGS = $(GLOBAL_AM_CFLAGS)