Resolving "undefined reference" compilation errors of Boost C++ code in Ubuntu -



Resolving "undefined reference" compilation errors of Boost C++ code in Ubuntu -

this question has reply here:

undefined reference boost::system::system_category() when compiling 6 answers

from terminal session:

go trojans >make g++ -static -i/usr/include/boost -i/usr/include/boost/filesystem get_sys_info.cpp /tmp/cc6nk9ev.o: in function `__static_initialization_and_destruction_0(int, int)': get_sys_info.cpp:(.text+0x13a): undefined reference `boost::system::generic_category()' get_sys_info.cpp:(.text+0x146): undefined reference `boost::system::generic_category()' get_sys_info.cpp:(.text+0x152): undefined reference `boost::system::system_category()' collect2: ld returned 1 exit status make: *** [all] error 1 go trojans >

the c++ code importing boost c++ filesystem library:

#include <iostream> #include <string> #include <stdio.h> #include <stdlib.h> // include boost c++ libraries #include <boost/filesystem.hpp> using namespace boost::filesystem; using namespace std; int main() { string my_str = "this string."; cout << my_str << endl; /* my_str = system("pwd"); my_str.append("\b\b\b\b\b\b\b\b extra"); cout << my_str << "a\b\b\b\b\b\b=" << endl; */ path p("."); cout << p << "==" << endl; homecoming 0; }

snippets terminal session @ directory boost c++ libraries located.

go trojans >pwd /usr/include/boost go trojans >ls -al total 1308 drwxr-xr-x 86 root root 12288 jan 29 09:30 . drwxr-xr-x 119 root root 20480 feb 4 08:08 .. ... drwxr-xr-x 5 root root 4096 jan 29 09:30 filesystem -rw-r--r-- 1 root root 1340 jan 5 2012 filesystem.hpp

how resolve undefined references? importing boost c++ filesystem library correctly? compiling code correctly?

what mistakes? can please kindly help me?

thank much, , have awesome day! ciao!

you need utilize -l/path/to/your/library in front end of phone call -lboost_system tell compiler find shared object. however, if can compile code, not run because runtime cannot locate file anyway, you're forced update path.

i'm assuming you're on school computer editing ld_library_path or utilizing /sbin/ldconfig illegal.

if they're not illegal, can either

export ld_library_path=$ld_library_path:/path/to/boost

in ~/.bashrc or equivalent

or can

touch /etc/ld.so.conf.d/boost.conf

vi /etc/ld.so.conf/boost.conf

put path boost library in here , save file. run:

/sbin/ldconfig

which reparses in /etc/ld.so.conf.d , update runtime paths.

good luck!

c++ ubuntu boost ubuntu-12.04

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