AIX使用STL编译动态库，在引用连接时出现大量警告

罗耗子 2012-03-27 09:55:35

多说无益，直接上代码
-----------------------------------------------------------------------------------
myso.cpp

#include <map>

#include <string>

#include <iostream>

#include "myso.h"



void print_mapdata(const std::map<std::string, std::string> &_mapData)

{

	std::map<std::string, std::string>::const_iterator itm = _mapData.begin();

	

	std::cout << '\n' << "--------------------------" << std::endl;

	

	for (; itm!=_mapData.end(); ++itm)

	{

		std::cout << itm->first << ": " << itm->second << std::endl; 

	}

	

	std::cout << "--------------------------" << std::endl;	

}

-----------------------------------------------------------------------------------
myso.h

#ifndef __MYSO_H__

#define __MYSO_H__



void print_mapdata(const std::map<std::string, std::string> &_mapData);



#endif

-----------------------------------------------------------------------------------
test.cpp

#include <map>

#include <string>

#include "myso.h"



int main()

{

	std::map<std::string, std::string> mapData;

	mapData["111111"]="AAAAAAAAAAAAAAAA";

	mapData["222222"]="BBBBBBBBBBBBBBBB";

	mapData["333333"]="CCCCCCCCCCCCCCCC";

	mapData["444444"]="DDDDDDDDDDDDDDDD";

	mapData["555555"]="EEEEEEEEEEEEEEEE";

	print_mapdata(mapData);

	return 0;

}

-----------------------------------------------------------------------------------
makefile

CC = cc

CXX = xlC

INCDIR = -I.

CFLAGS = -q64 $(INCDIR)

LIBDIR= .

EXCUTEFILE = ts

LIBFILE = libmyso.so



LINK= -L$(LIBDIR) -lmyso



OBJS = test.o



ts : $(OBJS)

	$(CXX) -q64 -brtl -V -bnoquiet -o $(EXCUTEFILE) $> $(LINK)



so : myso.o

	$(CXX) -q64 -G -o $(LIBFILE) $> 



test.o:test.cpp

	$(CXX) $(CFLAGS) -o $@ -c $>

	

myso.o:myso.cpp

	$(CXX) $(CFLAGS) -o $@ -c $>



clean:

	rm -f $(LIBFILE)

	rm -f $(EXCUTEFILE)

	rm -f *.o

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tx_3stones 2014-06-26

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有没有好办法？这些警告头痛。http://bbs.csdn.net/simple_captcha?code=3f4bb8136a23b8d2b0821e36f23df4d0093d35da&time=1403794868

罗耗子 2012-03-28

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网上找了一圈，还是没办法！结贴好了！

罗耗子 2012-03-27

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嗯，我用g++编译也是找不到，改成下面这样可以通过，但是还是有警告
对这个问题无从下手了，继续求助中



$ make so

        g++ -I. -maix64  -o myso.o -c myso.cpp

        ar rv libmyso.a myso.o 

ar: creating an archive file libmyso.a

a - myso.o

$ make 

        g++ -I. -maix64  -o test.o -c test.cpp

        g++ -maix64 -o ts test.o -L. -lmyso

ld: 0711-224 WARNING: Duplicate symbol: .__divti3

ld: 0711-224 WARNING: Duplicate symbol: .__modti3

ld: 0711-224 WARNING: Duplicate symbol: .__udivti3

ld: 0711-224 WARNING: Duplicate symbol: .__umodti3

ld: 0711-224 WARNING: Duplicate symbol: .__udivmodti4

ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more information.

$ g++ -v

Using built-in specs.

Target: powerpc-ibm-aix5.3.0.0

Configured with: ../configure --with-as=/usr/bin/as --with-ld=/usr/bin/ld --enable-languages=c,c++,java --prefix=/opt/freeware --enable-threads --enable-version-specific-runtime-libs --host=powerpc-ibm-aix5.3.0.0 --target=powerpc-ibm-aix5.3.0.0 --build=powerpc-ibm-aix5.3.0.0 --disable-libjava-multilib

Thread model: aix

gcc version 4.2.0

补充一下环境，我的xlC是 v6.1的，AIX是5.3

justkk 2012-03-27

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我的环境没有xlC，使用g++编译运行没有问题，也没有警告

只是奇怪的是，对于.so库文件，g++老是找不到
把libmyso.so改名为libmyso.a就可以了

罗耗子 2012-03-27

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 ------------------------- -------------------------------------------------

 .std::char_traits<char>::length(const char*) test.cpp(test.o)

    ** Duplicate **        {./libmyso.so}

 .std::_Tree<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Left(std::_Tree_nod<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Node*) test.cpp(test.o)

    ** Duplicate **        {./libmyso.so}

 .std::_Tree<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Right(std::_Tree_nod<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Node*) test.cpp(test.o)

    ** Duplicate **        {./libmyso.so}

 .std::_Tree<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Isnil(std::_Tree_nod<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Node*) test.cpp(test.o)

    ** Duplicate **        {./libmyso.so}

 .std::_Tree<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Value(std::_Tree_nod<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Node*) test.cpp(test.o)

    ** Duplicate **        {./libmyso.so}

 .strlen(const char*)             test.cpp(test.o)

    ** Duplicate **        {./libmyso.so}

 .std::_Tree<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Parent(std::_Tree_nod<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Node*) test.cpp(test.o)

    ** Duplicate **        {./libmyso.so}

 .memcpy(void*,const void*,unsigned long)         test.cpp(test.o)

    ** Duplicate **        {./libmyso.so}

 .std::basic_string<char,std::char_traits<char>,std::allocator<char> >::size() const test.cpp(test.o)

    ** Duplicate **        {./libmyso.so}

 .std::_Tree<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Min(std::_Tree_nod<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Node*) test.cpp(test.o)

    ** Duplicate **        {./libmyso.so}

 .std::exception::exception(const char*) test.cpp(test.o)

    ** Duplicate **        {./libmyso.so}

 .std::basic_string<char,std::char_traits<char>,std::allocator<char> >::_Nullstr() test.cpp(test.o)

    ** Duplicate **        {./libmyso.so}

 .std::exception::~exception() test.cpp(test.o)

    ** Duplicate **        {./libmyso.so}

 .std::exception::what() const test.cpp(test.o)

    ** Duplicate **        {./libmyso.so}

 .std::exception::_Doraise() const test.cpp(test.o)

    ** Duplicate **        {./libmyso.so}

 .std::exception::exception(const std::exception&) test.cpp(test.o)

    ** Duplicate **        {./libmyso.so}

 std::exception::~exception() test.cpp(test.o)

    ** Duplicate **        {./libmyso.so}

 std::exception::what() const test.cpp(test.o)

    ** Duplicate **        {./libmyso.so}

 std::exception::_Doraise() const test.cpp(test.o)

    ** Duplicate **        {./libmyso.so}

 std::basic_string<char,std::char_traits<char>,std::allocator<char> >::npos test.cpp(test.o)

    ** Duplicate **        {./libmyso.so}

RESOLVE: 196 of 11342 symbols were kept.

RESOLVE: The return code is 4.

(ld): addgl /usr/lib/glink64.o

ADDGL: Glink code added for 30 symbols.

(ld): er full

ER: There are no unresolved symbols.

(ld): mismatch

MISMATCH: No type mismatches exist.

(ld): comprld

COMPRLD: Kept 404 of 404 relocation entries.

(ld): origin page 0x10000000 0x20000000

(ld): libpath .:/usr/lpp/xlopt:/usr/vacpp/lib:/usr/lib:/lib

LIBPATH: Library path set to .:/usr/lpp/xlopt:/usr/vacpp/lib:/usr/lib:/lib

(ld): save 1L .

SAVE: Section sizes = 82592+3256+16 (0x142A0+0xCB8+0x10 hex)

SAVE: Size of TOC: 480 (0x1E0 hex)

(ld): rc

ld: 0711-224 WARNING: Duplicate symbol: std::basic_string<char,std::char_traits<char>,std::allocator<char> >::npos

RC: Highest return code was 4.

rm /tmp/xlcW05TIeya

rm /tmp/xlcW15TIeyb

rm /tmp/xlcW25TIeyc

rm /tmp/xlcMC5TIeyd.c

rm /tmp/xlcMC5TIeyd.o

rm /tmp/xlcMT5TIeye

$

罗耗子 2012-03-27

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$ make

        xlC -q64 -I. -o test.o -c test.cpp

        xlC -q64 -brtl -V -bnoquiet -o ts test.o -L. -lmyso

/bin/ld -b64 /lib/crt0_64.o -bpT:0x10000000 -bpD:0x20000000 -brtl -bnoquiet -ots test.o -L. -lmyso -L/usr/lpp/xlopt -lxlopt -L/usr/vacpp/lib -lC -lm -lc -bnobind  >/tmp/xlcLD5TIeyf

/usr/vacpp/exe/munch -X 64 -b - -o /tmp/xlcMC5TIeyd.c -t /tmp/xlcMT5TIeye </tmp/xlcLD5TIeyf

rm /tmp/xlcLD5TIeyf

/bin/ld -b64 /lib/crt0_64.o -bpT:0x10000000 -bpD:0x20000000 -brtl -bnoquiet -ots test.o -L. -lmyso -L/usr/lpp/xlopt -lxlopt -L/usr/vacpp/lib -lC -lm -lc  |

/usr/vacpp/bin/c++filt -S |

/bin/sed '/317.*::virtual-fn-table-ptr$/ s/^\(.*: \)*{*\([^}]*\)\(}*.*\)::virtual-fn-table-ptr$/\1Virtual table for class "\2": first non-inline virtual function in "\2" is not defined./' 

ld: 0711-224 WARNING: Duplicate symbol: .std::char_traits<char>::length(const char*)

ld: 0711-224 WARNING: Duplicate symbol: .std::_Tree<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Left(std::_Tree_nod<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Node*)

ld: 0711-224 WARNING: Duplicate symbol: .std::_Tree<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Right(std::_Tree_nod<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Node*)

ld: 0711-224 WARNING: Duplicate symbol: .std::_Tree<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Isnil(std::_Tree_nod<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Node*)

(ld): setopt 64

ld: 0711-224 WARNING: Duplicate symbol: .std::_Tree<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Value(std::_Tree_nod<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Node*)

(ld): halt 4

ld: 0711-224 WARNING: Duplicate symbol: .strlen(const char*)

(ld): setopt rtl

ld: 0711-224 WARNING: Duplicate symbol: .std::_Tree<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Parent(std::_Tree_nod<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Node*)

(ld): setopt rtllib

ld: 0711-224 WARNING: Duplicate symbol: .memcpy(void*,const void*,unsigned long)

(ld): setopt symbolic:1

ld: 0711-224 WARNING: Duplicate symbol: .std::basic_string<char,std::char_traits<char>,std::allocator<char> >::size() const

(ld): setfflag 4

ld: 0711-224 WARNING: Duplicate symbol: .std::_Tree<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Min(std::_Tree_nod<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<const std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >,0> >::_Node*)

(ld): savename ts

ld: 0711-224 WARNING: Duplicate symbol: .std::exception::exception(const char*)

(ld): filelist 8 1

ld: 0711-224 WARNING: Duplicate symbol: .std::basic_string<char,std::char_traits<char>,std::allocator<char> >::_Nullstr()

(ld): i /lib/crt0_64.o

ld: 0711-224 WARNING: Duplicate symbol: .std::exception::~exception()

(ld): i test.o

ld: 0711-224 WARNING: Duplicate symbol: .std::exception::what() const

(ld): lib ./libmyso.so

ld: 0711-224 WARNING: Duplicate symbol: .std::exception::_Doraise() const

(ld): lib /usr/lib/libxlopt.a

ld: 0711-224 WARNING: Duplicate symbol: .std::exception::exception(const std::exception&)

(ld): lib /usr/vacpp/lib/libC.a

ld: 0711-224 WARNING: Duplicate symbol: std::exception::~exception()

(ld): lib /usr/lib/libm.a

ld: 0711-224 WARNING: Duplicate symbol: std::exception::what() const

(ld): lib /usr/lib/libc.a

ld: 0711-224 WARNING: Duplicate symbol: std::exception::_Doraise() const

(ld): lib /usr/lib/librtl.a

LIBRARY: Shared object libmyso.so: 93 symbols imported.

LIBRARY: Symbols imported from import file /usr/vacpp/lib/libC.a[shr_32.imp]: 0

LIBRARY: Symbols imported from import file /usr/vacpp/lib/libC.a[shr2_32.imp]: 0

LIBRARY: Symbols imported from import file /usr/vacpp/lib/libC.a[shr3_32.imp]: 0

LIBRARY: Symbols imported from import file /usr/vacpp/lib/libC.a[ansi_32.imp]: 0

LIBRARY: Symbols imported from import file /usr/vacpp/lib/libC.a[shr_64.imp]: 383

LIBRARY: Symbols imported from import file /usr/vacpp/lib/libC.a[shr2_64.imp]: 24

LIBRARY: Symbols imported from import file /usr/vacpp/lib/libC.a[shr3_64.imp]: 27

LIBRARY: Symbols imported from import file /usr/vacpp/lib/libC.a[ansi_64.imp]: 2448

LIBRARY: Shared object libC.a[ansi_64.o]: 2658 symbols imported.

LIBRARY: Shared object libc.a[shr_64.o]: 2696 symbols imported.

LIBRARY: Shared object libc.a[posix_aio_64.o]: 20 symbols imported.

LIBRARY: Shared object libc.a[aio_64.o]: 18 symbols imported.

LIBRARY: Shared object libc.a[pse_64.o]: 5 symbols imported.

LIBRARY: Shared object libc.a[dl_64.o]: 4 symbols imported.

LIBRARY: Shared object libc.a[pty_64.o]: 1 symbols imported.

LIBRARY: Shared object librtl.a[lazy42_64.o]: 3 symbols imported.

FILELIST: Number of previously inserted files processed: 8

(ld): resolve

ld: 0711-228 WARNING: Duplicate symbols were found while resolving symbols.

        The following duplicates were found:

 Symbol                    Source-File(Object) OR Import-File{Shared-object}

。。。。。。

罗耗子 2012-03-27

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$ make so
xlC -q64 -I. -o myso.o -c myso.cpp
xlC -q64 -G -o libmyso.so myso.o

justkk 2012-03-27

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我这边也是有这些告警
ld: 0711-224 WARNING: Duplicate symbol: .__divdi3
ld: 0711-224 WARNING: Duplicate symbol: .__moddi3
ld: 0711-224 WARNING: Duplicate symbol: .__udivdi3
ld: 0711-224 WARNING: Duplicate symbol: .__umoddi3
ld: 0711-224 WARNING: Duplicate symbol: .__udivmoddi4

一直没理会
随便用g++编译一个.cpp文件都有这些告警