* undefined symbol
@ 1998-10-21 22:10 Ulrich Czekalla
1998-10-26 2:13 ` Alexandre Oliva
0 siblings, 1 reply; 6+ messages in thread
From: Ulrich Czekalla @ 1998-10-21 22:10 UTC (permalink / raw)
To: egcs
I have created a shared library which contains a function called
_mallocdb. I wrote a small test program which makes a call to it and it
compiled and linked correctly. When I try to run it I get the error;
./test: error in loading shared libraries
/home/lcl/liblcld.so: undefined symbol: _mallocdb__FUiiPc
I tried checking the symbols of the library;
> nm liblcld.so | grep _mallocdb
00002a0c T _mallocdb__FUiiPCc
U _mallocdb__FUiiPc
Anyone have any ideas? Is there something I have to do to explicitly
export certain function? Is there a document which explains this stuff
in painful detail?
Thanks,
-Ulrich
--
/*****************************************************
* Ulrich Czekalla *
* University of Toronto *
* Software Engineering Bachelor of Commerce *
* g5ulczek@cdf.utoronto.ca *
*****************************************************/
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: undefined symbol
1998-10-21 22:10 undefined symbol Ulrich Czekalla
@ 1998-10-26 2:13 ` Alexandre Oliva
0 siblings, 0 replies; 6+ messages in thread
From: Alexandre Oliva @ 1998-10-26 2:13 UTC (permalink / raw)
To: Ulrich Czekalla; +Cc: egcs
Ulrich Czekalla <linux@western.wave.ca> writes:
> ./test: error in loading shared libraries
> /home/lcl/liblcld.so: undefined symbol: _mallocdb__FUiiPc
Declare it as extern "C" in the header-file you #include in the C++
sources.
--
Alexandre Oliva
mailto:oliva@dcc.unicamp.br mailto:oliva@gnu.org mailto:aoliva@acm.org
http://www.dcc.unicamp.br/~oliva
Universidade Estadual de Campinas, SP, Brasil
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: undefined symbol
2003-08-06 18:53 ` Janis Johnson
@ 2003-08-06 19:11 ` sami ozen
0 siblings, 0 replies; 6+ messages in thread
From: sami ozen @ 2003-08-06 19:11 UTC (permalink / raw)
To: Janis Johnson; +Cc: gcc
Hi Janis,
Yes i realised the difference name manglings for different compilers.
i installed same compiler (SUN FORTE) that libraries are compiled , and
after i succeeded in compiling my applications.
Than you very much,
Sami
----- Original Message -----
From: "Janis Johnson" <janis187@us.ibm.com>
To: "sami ozen" <sami@provus.ro>
Cc: <gcc@gcc.gnu.org>
Sent: Wednesday, August 06, 2003 7:58 PM
Subject: Re: undefined symbol
> On Wed, Aug 06, 2003 at 10:22:31AM +0300, sami ozen wrote:
> >
> > I am using some 3rd party libraries, and while using these libs i got a
> > linker error.
>
> It's likely that the name mangling used by the C++ compiler that built
> that library is different from the name mangling used by the version of
> G++ you're using, so the function names that the linker sees are
> different. Name mangling is just one of many differences between
> the object code generated by different C++ compilers. You can't link
> together C++ object files (including libraries) unless they were built
> by the same compiler or by compilers that follow the same application
> binary interface (ABI) for C++.
>
> See http://gcc.gnu.org/onlinedocs/gcc/Compatibility.html#Compatibility
> for some general information about issues that affect interoperability
> of C++ compilers.
>
> Janis
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: undefined symbol
2003-08-06 7:53 sami ozen
@ 2003-08-06 18:53 ` Janis Johnson
2003-08-06 19:11 ` sami ozen
0 siblings, 1 reply; 6+ messages in thread
From: Janis Johnson @ 2003-08-06 18:53 UTC (permalink / raw)
To: sami ozen; +Cc: gcc
On Wed, Aug 06, 2003 at 10:22:31AM +0300, sami ozen wrote:
>
> I am using some 3rd party libraries, and while using these libs i got a
> linker error.
It's likely that the name mangling used by the C++ compiler that built
that library is different from the name mangling used by the version of
G++ you're using, so the function names that the linker sees are
different. Name mangling is just one of many differences between
the object code generated by different C++ compilers. You can't link
together C++ object files (including libraries) unless they were built
by the same compiler or by compilers that follow the same application
binary interface (ABI) for C++.
See http://gcc.gnu.org/onlinedocs/gcc/Compatibility.html#Compatibility
for some general information about issues that affect interoperability
of C++ compilers.
Janis
^ permalink raw reply [flat|nested] 6+ messages in thread
* undefined symbol
@ 2003-08-06 7:53 sami ozen
2003-08-06 18:53 ` Janis Johnson
0 siblings, 1 reply; 6+ messages in thread
From: sami ozen @ 2003-08-06 7:53 UTC (permalink / raw)
To: gcc
I am using some 3rd party libraries, and while using these libs i got a
linker error.
When i compiled istauth.cxx these following 3 functions cant be linked, what
can be the solution?
(All i can see is , when functions (functions that are implemented in
libraries) are not defined in
#ifdef __cplusplus
extern "C" {
#endif
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
#ifdef __cplusplus
}
#endif
i cant use that function, all other functions defined in extern decalration
are linked without any problem)
/prooasis/oasis74/sami/istauth/src>ls
Makefile aclocal.m4 config.status depcomp install-sh
missing
Makefile.am autom4te.cache configure dummy.cxx istauth.cxx
mkinstalldirs
Makefile.in config.log configure.in dummy.o istauth.o
/prooasis/oasis74/sami/istauth/src>
g++ -g -O2 -o istauth istauth.o
dummy.o -locurrency-1 -loshc-2 -loauth-0 -lombox-0 -loistdbm-3 -lotrace-0 -l
osyslg-0 -locatsig-0 -loargv0-0
Undefined first referenced
symbol in file
ccyGetDescription(int, char*, char*, char*, char*,
char*)/prooasis/oasis74/lib/liboauth-0.so
shc_locate_bin(shcpkg**, char*) /prooasis/oasis74/lib/liboauth-0.so
ccyGetDecimalPosition(int, int) /prooasis/oasis74/lib/liboauth-0.so
ld: fatal: Symbol referencing errors. No output written to istauth
collect2: ld returned 1 exit status
make: *** [istauth] Error 1
/prooasis/oasis74/sami/istauth/src>
/prooasis/oasis74/lib>elfdump libocurrency-1.0.3.so|grep ccyGetDe*
[30] 0x00003460 0x0000019c FUNC GLOB D 0 .text int
ccyGetDecimalPosition(int,int)
[63] 0x000038b8 0x00000120 FUNC GLOB D 0 .text int
ccyGetDescription(int,char*,char*,char*,char*,char*)
[66] 0x000033f0 0x0000005c FUNC GLOB D 0 .text int
ccyGetDecimalPosition(int,char*,int)
[96] 0x00003460 0x0000019c FUNC GLOB D 0 .text int
ccyGetDecimalPosition(int,int)
[129] 0x000038b8 0x00000120 FUNC GLOB D 0 .text int
ccyGetDescription(int,char*,char*,char*,char*,char*)
[132] 0x000033f0 0x0000005c FUNC GLOB D 0 .text int
ccyGetDecimalPosition(int,char*,int)
[30] int ccyGetDecimalPosition(int,int)
[63] int
ccyGetDescription(int,char*,char*,char*,char*,char*)
152 [66] int ccyGetDecimalPosition(int,char*,int)
R_SPARC_JMP_SLOT 0x15360 0 .rela.plt int
ccyGetDecimalPosition(int,int)
/prooasis/oasis74/lib>
/prooasis/oasis74/lib>elfdump liboshc-2.0.45.so|grep shc_locate_bin
[1737] 0x0007dfb0 0x00000284 FUNC GLOB D 0 .text int
shc_locate_bin(shcpkg**,char*)
[2248] 0x0007e248 0x000001f4 FUNC GLOB D 0 .text int
shc_locate_bin(shcpkg**,char*,char*)
[5389] 0x0007dfb0 0x00000284 FUNC GLOB D 0 .text int
shc_locate_bin(shcpkg**,char*)
[5900] 0x0007e248 0x000001f4 FUNC GLOB D 0 .text int
shc_locate_bin(shcpkg**,char*,char*)
1008 [2248] int shc_locate_bin(shcpkg**,char*,char*)
[1737] int shc_locate_bin(shcpkg**,char*)
R_SPARC_JMP_SLOT 0xb7cac 0 .rela.plt int
shc_locate_bin(shcpkg**,char*)
R_SPARC_JMP_SLOT 0xb7d90 0 .rela.plt int
shc_locate_bin(shcpkg**,char*,char*)
/prooasis/oasis74/lib>
^ permalink raw reply [flat|nested] 6+ messages in thread
* undefined symbol
@ 2003-08-06 7:42 sami ozen
0 siblings, 0 replies; 6+ messages in thread
From: sami ozen @ 2003-08-06 7:42 UTC (permalink / raw)
To: gcc
When i compiled istauth.cxx these following 3 functions cant be linked, what
is the reason?
(For temporary solution i made alternative functions that can be used
instead of these, but i want to use original sources, so it better to solve
this problem.
All i can see is functions are not defined in
#ifdef __cplusplus
extern "C" {
#endif
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
#ifdef __cplusplus
}
#endif
then i cant use that function, but i couldnt find away to get rid off this
error, all other functions defined in extern decalration are linked without
any problem)
/prooasis/oasis74/sami/istauth/src>ls
Makefile aclocal.m4 config.status depcomp install-sh
missing
Makefile.am autom4te.cache configure dummy.cxx istauth.cxx
mkinstalldirs
Makefile.in config.log configure.in dummy.o istauth.o
/prooasis/oasis74/sami/istauth/src>
g++ -g -O2 -o istauth istauth.o
dummy.o -locurrency-1 -loshc-2 -loauth-0 -lombox-0 -loistdbm-3 -lotrace-0 -l
osyslg-0 -locatsig-0 -loargv0-0
Undefined first referenced
symbol in file
ccyGetDescription(int, char*, char*, char*, char*,
char*)/prooasis/oasis74/lib/liboauth-0.so
shc_locate_bin(shcpkg**, char*) /prooasis/oasis74/lib/liboauth-0.so
ccyGetDecimalPosition(int, int) /prooasis/oasis74/lib/liboauth-0.so
ld: fatal: Symbol referencing errors. No output written to istauth
collect2: ld returned 1 exit status
make: *** [istauth] Error 1
/prooasis/oasis74/sami/istauth/src>
/prooasis/oasis74/lib>elfdump libocurrency-1.0.3.so|grep ccyGetDe*
[30] 0x00003460 0x0000019c FUNC GLOB D 0 .text int
ccyGetDecimalPosition(int,int)
[63] 0x000038b8 0x00000120 FUNC GLOB D 0 .text int
ccyGetDescription(int,char*,char*,char*,char*,char*)
[66] 0x000033f0 0x0000005c FUNC GLOB D 0 .text int
ccyGetDecimalPosition(int,char*,int)
[96] 0x00003460 0x0000019c FUNC GLOB D 0 .text int
ccyGetDecimalPosition(int,int)
[129] 0x000038b8 0x00000120 FUNC GLOB D 0 .text int
ccyGetDescription(int,char*,char*,char*,char*,char*)
[132] 0x000033f0 0x0000005c FUNC GLOB D 0 .text int
ccyGetDecimalPosition(int,char*,int)
[30] int ccyGetDecimalPosition(int,int)
[63] int
ccyGetDescription(int,char*,char*,char*,char*,char*)
152 [66] int ccyGetDecimalPosition(int,char*,int)
R_SPARC_JMP_SLOT 0x15360 0 .rela.plt int
ccyGetDecimalPosition(int,int)
/prooasis/oasis74/lib>
/prooasis/oasis74/lib>elfdump liboshc-2.0.45.so|grep shc_locate_bin
[1737] 0x0007dfb0 0x00000284 FUNC GLOB D 0 .text int
shc_locate_bin(shcpkg**,char*)
[2248] 0x0007e248 0x000001f4 FUNC GLOB D 0 .text int
shc_locate_bin(shcpkg**,char*,char*)
[5389] 0x0007dfb0 0x00000284 FUNC GLOB D 0 .text int
shc_locate_bin(shcpkg**,char*)
[5900] 0x0007e248 0x000001f4 FUNC GLOB D 0 .text int
shc_locate_bin(shcpkg**,char*,char*)
1008 [2248] int shc_locate_bin(shcpkg**,char*,char*)
[1737] int shc_locate_bin(shcpkg**,char*)
R_SPARC_JMP_SLOT 0xb7cac 0 .rela.plt int
shc_locate_bin(shcpkg**,char*)
R_SPARC_JMP_SLOT 0xb7d90 0 .rela.plt int
shc_locate_bin(shcpkg**,char*,char*)
/prooasis/oasis74/lib>
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2003-08-06 18:06 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
1998-10-21 22:10 undefined symbol Ulrich Czekalla
1998-10-26 2:13 ` Alexandre Oliva
2003-08-06 7:42 sami ozen
2003-08-06 7:53 sami ozen
2003-08-06 18:53 ` Janis Johnson
2003-08-06 19:11 ` sami ozen
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