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ld: Duplicate symbol "WaitMutex" in files Main_Program.o and Modelo.o

 
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Pedro Dinis
Advisor

ld: Duplicate symbol "WaitMutex" in files Main_Program.o and Modelo.o


this the libcommon.h

#ifndef __COMMON_H
#define __COMMON_H

#pragma once

#define SEM_MUTEX 0
#define SEM_EMPTY 1
#define SEM_FULL 2

struct sembuf WaitMutex={SEM_MUTEX, -1, 0};

class common
{
public:
common();

~common(void);
};

#endif

this class is using the library :

#ifndef __MODELO_H
#define __MODELO_H

#include "libcommon.h"

using namespace oracle::occi;
using namespace std;


class Modelo

{

public:

Modelo();

~Modelo(void);


};

#endif


i am going to show you the Makefile

ICLIBPATH=-L$(ICLIBHOME)
THREADLIBS=
CCLIB=$(ICLIBPATH) -locci -lclntsh -lgen $(THREADLIBS)

all: exe

# Cleanup the current directory: (make clean)
#
clean:
rm -f *.o

# Include the Oracle compiler settings. Typically overkill, but
# platform-independent.
#
include /opt/users/ora10g/rdbms/lib/env_rdbms.mk

libcommon.o: libcommon.cc libcommon.h
$(CCC) -Aa -c +z libcommon.cc

library:libcommon.o
ld -b -o libcommon.so libcommon.o

Modelo.o: Modelo.cc Modelo.h
$(CCC) $(CFLAGSCC) -c Modelo.cc

Main_Program.o: Main_Program.cc Modelo.h
$(CCC) $(CFLAGSCC) -c Main_Program.cc

exe:libcommon.o library Modelo.o Main_Program.o

$(CCC) -o $(EXE) Main_Program.o Modelo.o $(ICLIBPATH) $(SHARED_OCCILIBS) -L. -lcommon


this the i have trying to link:

[]-pedro:/home/pedro/MIR-PRUEBAS/modelo_SP_teste>make
/opt/aCC/bin/aCC +DD64 -Aa -c +z libcommon.cc
ld -b -o libcommon.so libcommon.o
/opt/aCC/bin/aCC +DD64 -AA -DOCCI_NO_WSTRING=1 +DD64 -D_RWSTD_MULTI_THREAD -I/opt/users/ora10g/rdbms/demo -I/opt/users/ora10g/rdbms/public -I/opt/users/ora10g/plsql/public -I/opt/users/ora10g/network/public -DHPUX -D_REENTRANT -DHPUX_KTHREAD -DSLXMX_ENABLE -DSLTS_ENABLE -DSS_64BIT_SERVER -DBIT64 -DMACHINE64 -DORAIA64 -DHPUX_IA64 -c Modelo.cc
/opt/aCC/bin/aCC +DD64 -AA -DOCCI_NO_WSTRING=1 +DD64 -D_RWSTD_MULTI_THREAD -I/opt/users/ora10g/rdbms/demo -I/opt/users/ora10g/rdbms/public -I/opt/users/ora10g/plsql/public -I/opt/users/ora10g/network/public -DHPUX -D_REENTRANT -DHPUX_KTHREAD -DSLXMX_ENABLE -DSLTS_ENABLE -DSS_64BIT_SERVER -DBIT64 -DMACHINE64 -DORAIA64 -DHPUX_IA64 -c Main_Program.cc
/opt/aCC/bin/aCC +DD64 -o occiteste Main_Program.o Modelo.o -L/opt/users/ora10g/lib -locci -lclntsh `cat /opt/users/ora10g/lib/sysliblist` -lm -L. -lcommon
ld: Duplicate symbol "WaitMutex" in files Main_Program.o and Modelo.o
ld: Duplicate symbol "SignalMutex" in files Main_Program.o and Modelo.o
ld: Duplicate symbol "WaitEmpty" in files Main_Program.o and Modelo.o
ld: Duplicate symbol "SignalEmpty" in files Main_Program.o and Modelo.o
ld: Duplicate symbol "WaitFull" in files Main_Program.o and Modelo.o
ld: Duplicate symbol "SignalFull" in files Main_Program.o and Modelo.o
6 errors.
make: *** [exe] Error 1
[]-pedro:/home/pedro/MIR-PRUEBAS/modelo_SP_teste>


thanks

SLB SLB SLB Glorioso
2 REPLIES 2
Dennis Handly
Acclaimed Contributor
Solution

Re: ld: Duplicate symbol "WaitMutex" in files Main_Program.o and Modelo.o

struct sembuf WaitMutex={SEM_MUTEX, -1, 0};

You can't put definitions of global data in header files. You'll get duplicates exactly like this.

The correct way to do this is with extern declaration in the header and with one source with the definition.

(You can of course do this with templates and template class static data members.)

>ld -b -o libcommon.so libcommon.o

It is illegal to use ld directly to build shared libs. Use aCC -b instead.

>-D_RWSTD_MULTI_THREAD

You should be compiling with -mt to set all of the correct threading defines.

Pedro Dinis
Advisor

Re: ld: Duplicate symbol "WaitMutex" in files Main_Program.o and Modelo.o

it is working now i just moved the declarations to the .cc .

thanks
SLB SLB SLB Glorioso