Another attempt to build on the Mac

Makefile

@@ -15,7 +15,7 @@
 #     Allan Stockdill-Mander - SSL updates
 #     Andy Piper - various fixes
 #     Ian Craggs - OSX build
-#     Rainer Poisel - support for cross-compilation
+#     Rainer Poisel - support for multi-core builds and cross-compilation
 #*******************************************************************************/
 
 # Note: on OS X you should install XCode and the associated command-line tools
@@ -111,10 +111,19 @@ CCFLAGS_SO = -g -fPIC $(CFLAGS) -Os -Wall -fvisibility=hidden
 FLAGS_EXE = $(LDFLAGS) -I ${srcdir} -lpthread -L ${blddir}
 FLAGS_EXES = $(LDFLAGS) -I ${srcdir} -Wl,--start-group -lpthread -lssl -lcrypto -Wl,--end-group -L ${blddir}
 
+
+LDFLAGS_C = $(LDFLAGS) -shared -Wl,-init,$(MQTTCLIENT_INIT) -lpthread
+LDFLAGS_CS = $(LDFLAGS) -shared $(START_GROUP) -lpthread $(EXTRA_LIB) -lssl -lcrypto $(END_GROUP) -Wl,-init,$(MQTTCLIENT_INIT)
+LDFLAGS_A = $(LDFLAGS) -shared -Wl,-init,$(MQTTASYNC_INIT) -lpthread
+LDFLAGS_AS = $(LDFLAGS) -shared $(START_GROUP) -lpthread $(EXTRA_LIB) -lssl -lcrypto $(END_GROUP) -Wl,-init,$(MQTTASYNC_INIT)
+
 ifeq ($(OSTYPE),Linux)
 
 MQTTCLIENT_INIT = MQTTClient_init
 MQTTASYNC_INIT = MQTTAsync_init
+START_GROUP = -Wl,--start-group
+END_GROUP = -Wl,--end-group
+
 LDFLAGS_C += -Wl,-soname,lib$(MQTTLIB_C).so.${MAJOR_VERSION}
 LDFLAGS_CS += -Wl,-soname,lib$(MQTTLIB_CS).so.${MAJOR_VERSION} -Wl,-no-whole-archive
 LDFLAGS_A += -Wl,-soname,lib${MQTTLIB_A}.so.${MAJOR_VERSION}
@@ -126,6 +135,9 @@ else ifeq ($(OSTYPE),Darwin)
 
 MQTTCLIENT_INIT = _MQTTClient_init
 MQTTASYNC_INIT = _MQTTAsync_init
+START_GROUP =
+END_GROUP = 
+
 CCFLAGS_SO += -Wno-deprecated-declarations -DUSE_NAMED_SEMAPHORES
 LDFLAGS_C += -Wl,-install_name,lib$(MQTTLIB_C).so.${MAJOR_VERSION}
 LDFLAGS_CS += -Wl,-install_name,lib$(MQTTLIB_CS).so.${MAJOR_VERSION}
@@ -135,11 +147,6 @@ LDFLAGS_AS += -Wl,-install_name,lib${MQTTLIB_AS}.so.${MAJOR_VERSION}
 EXTRA_LIB = -ld
 endif
 
-LDFLAGS_C = $(LDFLAGS) -shared -Wl,-init,$(MQTTCLIENT_INIT) -lpthread
-LDFLAGS_A = $(LDFLAGS) -shared -Wl,-init,$(MQTTASYNC_INIT) -lpthread
-LDFLAGS_CS = $(LDFLAGS) -shared -Wl,--start-group -lpthread $(EXTRA_LIB) -lssl -lcrypto -Wl,--end-group -Wl,-init,$(MQTTCLIENT_INIT)
-LDFLAGS_AS = $(LDFLAGS) -shared -Wl,--start-group -lpthread $(EXTRA_LIB) -lssl -lcrypto -Wl,--end-group -Wl,-init,$(MQTTASYNC_INIT)
-
 all: build
 
 build: | mkdir ${MQTTLIB_C_TARGET} ${MQTTLIB_CS_TARGET} ${MQTTLIB_A_TARGET} ${MQTTLIB_AS_TARGET} ${MQTTVERSION_TARGET} ${SYNC_SAMPLES} ${ASYNC_SAMPLES} ${SYNC_TESTS} ${SYNC_SSL_TESTS} ${ASYNC_TESTS} ${ASYNC_SSL_TESTS}