compile a program

Hi Friends , I face a problem when I read others source-code and try to re-compile this program , I have checked the makefile and try to file some thread , but it seems ok , the compile system alway told me : /usr/ccs/bin/ld: Unsatisfied symbols: S_Trim (code) MQ_SetOption (code) MQ_QInit (code) MQ_Disconnect (code) MQ_Connect (code) MQ_RequestReply (code) CFG_GetConfigValue (code) CFG_ReadConfig (code) LG_Log (code) *** Error exit code 1 I check the makefile and find that LIBS = -L$(TSS_ROOT)/lib \\ ltdl -lrmi -lcibi -ltibQ -lgdss -lesa - lqlsysut\\ -lmsa -lchan -lmdss -lciutil -lutil \\ -lqlutil -lnsl LOCAL_LIBS = -L$(TOP)/util/lib -L$(TOP)/tib/lib -ltibapi -lctglib ECFLAGS= -o call_plc.exe $(CFLAGS) $(HPUXCFLAGS) GLIBS=$(CTGTIBLIBDIR)/libtibapi.a $(CTGUTLLIBDIR)/libctglib.a $(LIBS) \\ -L$(LCLLIBDIR) -lskpkg call_plc.exe: call_plc.o c4gl $(ECFLAGS) plclient.ec call_plc.c have been defined and referenced correctly , so how can I find the question furtherly ? by the way I have a related problem about this : how can I konw the calls in a library (.a) file , how can I reference a function implemented in a library(.a file) (I am not an expert of c programming) tkx in advance , JianJun Sent via Deja.com http://www.deja.com/ Before you buy.