[LOGCXX-372] undefined reference to log4cxx::helpers::MessageBuffer

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: 0.10.0
• Fix Version/s: 0.11.0
• Component/s: Build
• Environment: uname -a ; ; {code}; Linux build.dev 2.6.9-78.0.8.ELsmp #1 SMP Wed Nov 19 19:42:38 EST 2008 x86_64 x86_64 x86_64 GNU/Linux; {code}; ; /etc/redhat-release; {code}; CentOS release 4.7 (Final); {code}
• Assignee: Curt Arnold
• Reporter: Al Olivier
• Created: 27/Oct/10 18:55
• Updated: 28/Oct/10 20:12
• Resolved: 28/Oct/10 20:12

Description

Successfully downloaded compiled and linked log4cxx.so

total 43512
-rwxr-xr-x  1 X users 11701516 Oct 14 11:20 liblog4cxx.so.10.0.0
lrwxrwxrwx  1 X users       20 Oct 14 11:20 liblog4cxx.so.10 -> liblog4cxx.so.10.0.0
lrwxrwxrwx  1 X users       20 Oct 14 11:20 liblog4cxx.so -> liblog4cxx.so.10.0.0
-rwxr-xr-x  1 X users     1061 Oct 14 11:20 liblog4cxx.la
-rw-r--r--  1 X users 31221258 Oct 14 11:20 liblog4cxx.a

client code is very simple, will need to reduce code to make it understandable if we need to go there - Currently only interested in getting past a custom application compilation and linking of libraries in the simplest way possible - the custom application references the following log4cxx directives

...
#include "log4cxx/logstring.h"
#include "log4cxx/logger.h"
#include "log4cxx/basicconfigurator.h"
#include "log4cxx/helpers/exception.h"
#include "log4cxx/helpers/messagebuffer.h"
#include "log4cxx/ndc.h"
...
using namespace log4cxx;
using namespace log4cxx::helpers;
using log4cxx::Logger;
...
LoggerPtr logger(Logger::getLogger("MyApp"));
...
LOG4CXX_WARN(logger, "WARN Entering getintv");
...

Compilation references the include directory (-I/X/include) as well as the library directory (-L/X/lib) where the log4cxx libraries and includes are found (on the X path as seen above from the log4cxx lib listing) along with -llog4cxx

/usr/bin/g++ -z muldefs -m64 -L/X/lib -L/usr/lib64 -I/X/include -I../common -L/lib64 -L/home/oracle/app/product/11.1.0/db_1/precomp/lib/ -L/home/oracle/app/product/11.1.0/db_1/lib/ -L/home/oracle/app/product/11.1.0/db_1/lib/stubs/ -lc -lstdc++ -lclntsh -llog4cxx -o getintv getintv.o ../../../lib/debug/stproc.o ../../../lib/debug/list.o msg.o common.o fctl.o bcp.o xtrct.o

The result of the compilation

getintv.cc:237: undefined reference to `log4cxx::helpers::MessageBuffer::MessageBuffer()'
getintv.o(.text+0x1ff):getintv.cc37: undefined reference to `log4cxx::helpers::MessageBuffer::operator<<(char const*)'
getintv.o(.text+0x20e):getintv.cc:237: undefined reference to `log4cxx::helpers::MessageBuffer::str(log4cxx::helpers::CharMessageBuffer&)'
getintv.o(.text+0x2a3):getintv.cc:237: undefined reference to `log4cxx::helpers::MessageBuffer::~MessageBuffer()'
getintv.o(.text+0x2bb):getintv.cc:237: undefined reference to `log4cxx::helpers::MessageBuffer::~MessageBuffer()'
getintv.o(.text+0x2e1):getintv.cc:238: undefined reference to `log4cxx::helpers::MessageBuffer::MessageBuffer()'
getintv.o(.text+0x31b):getintv.cc:238: undefined reference to `log4cxx::helpers::MessageBuffer::operator<<(char const*)'
getintv.o(.text+0x32a):getintv.cc:238: undefined reference to `log4cxx::helpers::MessageBuffer::str(log4cxx::helpers::CharMessageBuffer&)'
getintv.o(.text+0x3bf):getintv.cc:238: undefined reference to `log4cxx::helpers::MessageBuffer::~MessageBuffer()'
getintv.o(.text+0x3d7):getintv.cc:238: undefined reference to `log4cxx::helpers::MessageBuffer::~MessageBuffer()'
collect2: ld returned 1 exit status

I extracted symbols (using nm - list symbols from object files) from liblog4cxx.a and was not able to find log4cxx::helpers::MessageBuffer - Instead I found references to only log4cxx::helpers::CharMessageBuffer

{code) nm -C liblog4cxx.a {code}

will generate a large file, here is a small excerpt around grepping for MessageBuffer

                 U __gxx_personality_v0
                 U memcpy
                 U strlen
                 U _Unwind_Resume
                 U operator delete(void*)
0000000000000030 T log4cxx::helpers::CharMessageBuffer::str(log4cxx::helpers::CharMessageBuffer&)
0000000000000760 T log4cxx::helpers::CharMessageBuffer::str(std::basic_ostream<char, std::char_traits<char> >&)
0000000000000230 T log4cxx::helpers::CharMessageBuffer::CharMessageBuffer()
0000000000000240 T log4cxx::helpers::CharMessageBuffer::CharMessageBuffer()
0000000000000350 T log4cxx::helpers::CharMessageBuffer::operator std::basic_ostream<char, std::char_traits<char> >&()
00000000000000d0 T log4cxx::helpers::CharMessageBuffer::~CharMessageBuffer()
0000000000000180 T log4cxx::helpers::CharMessageBuffer::~CharMessageBuffer()
0000000000000700 T log4cxx::helpers::CharMessageBuffer::operator<<(bool)
0000000000000250 T log4cxx::helpers::CharMessageBuffer::operator<<(char)
00000000000005c0 T log4cxx::helpers::CharMessageBuffer::operator<<(double)
0000000000000580 T log4cxx::helpers::CharMessageBuffer::operator<<(long double)
00000000000005f0 T log4cxx::helpers::CharMessageBuffer::operator<<(float)
0000000000000680 T log4cxx::helpers::CharMessageBuffer::operator<<(int)
0000000000000660 T log4cxx::helpers::CharMessageBuffer::operator<<(unsigned int)
0000000000000640 T log4cxx::helpers::CharMessageBuffer::operator<<(long)
0000000000000620 T log4cxx::helpers::CharMessageBuffer::operator<<(unsigned long)
00000000000000c0 T log4cxx::helpers::CharMessageBuffer::operator<<(char*)
0000000000000720 T log4cxx::helpers::CharMessageBuffer::operator<<(std::ios_base& (*)(std::ios_base&))
0000000000000050 T log4cxx::helpers::CharMessageBuffer::operator<<(char const*)
0000000000000560 T log4cxx::helpers::CharMessageBuffer::operator<<(void*)
0000000000000000 T log4cxx::helpers::CharMessageBuffer::operator<<(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
00000000000006c0 T log4cxx::helpers::CharMessageBuffer::operator<<(short)

Before I dig into the code I used to integrate log4cxx, should there be symbols in the log4cxx library for log4cxx::helpers::MessageBuffer