G++ cannot find boost library

2019-02-23 07:14发布

问题:

I am not good in command-line compiling. My problem is inability to compile simple project, that depends from Boost. The following is a log of my trying:

$ g++ -Wall test.cpp -o main
/tmp/ccCTvBYE.o: In function `__static_initialization_and_destruction_0(int, int)':
test.cpp:(.text+0x6b): undefined reference to `boost::system::generic_category()'
test.cpp:(.text+0x77): undefined reference to `boost::system::generic_category()'
test.cpp:(.text+0x83): undefined reference to `boost::system::system_category()'
/tmp/ccCTvBYE.o: In function `boost::asio::error::get_system_category()':
test.cpp:(.text._ZN5boost4asio5error19get_system_categoryEv[_ZN5boost4asio5error19get_system_categoryEv]+0x5): undefined reference to `boost::system::system_category()'
collect2: error: ld returned 1 exit status

So, there I found instructions for adding-lboost_system or -lboost_system-mt. I got the following:

$ g++ -lboost_system -Wall test.cpp -o main                                                                                                                    
/usr/bin/ld: cannot find -lboost_system
collect2: error: ld returned 1 exit status

$ g++ -lboost_system-mt -Wall test.cpp -o main                                                                                                                 
/usr/bin/ld: cannot find -lboost_system-mt
collect2: error: ld returned 1 exit status

I tried to locate boost_system library.

$ /sbin/ldconfig -p | grep boost_system
    libboost_system.so.1.53.0 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libboost_system.so.1.53.0

Then I unsuccessfully tried the following

$ g++ -I"/home/third_party/boost/" -L"/usr/lib/x86_64-linux-gnu/" -lboost_system -Wall test.cpp -o main
/usr/bin/ld: cannot find -lboost_system
collect2: error: ld returned 1 exit status

Now I am stuck. How to form the command to compile?

Edit:

The following trying didn't help, too.

ln -s /usr/lib/x86_64-linux-gnu/libboost_system.so.1.53.0 /usr/lib/x86_64-linux-gnu/libboost_system.so
ldconfig -n /usr/lib/x86_64-linux-gnu/

$ ll /usr/lib/x86_64-linux-gnu/ | grep boost_system
lrwxrwxrwx   1 root root       51 янв.  21 19:47 libboost_system.so -> /usr/lib/x86_64-linux-gnu/libboost_system.so.1.53.0
-rw-r--r--   1 root root    14536 окт.  13 07:14 libboost_system.so.1.53.0

$ g++ -I"/home/third_party/boost/" -L"/usr/lib/x86_64-linux-gnu/" -lboost_system -Wall -m64 boost_async.cpp -o main
/tmp/ccE20K2W.o: In function `__static_initialization_and_destruction_0(int, int)':
test.cpp:(.text+0x6b): undefined reference to `boost::system::generic_category()'
test.cpp:(.text+0x77): undefined reference to `boost::system::generic_category()'
test.cpp:(.text+0x83): undefined reference to `boost::system::system_category()'
/tmp/ccE20K2W.o: In function `boost::asio::error::get_system_category()':
test.cpp:(.text._ZN5boost4asio5error19get_system_categoryEv[_ZN5boost4asio5error19get_system_categoryEv]+0x5): undefined reference to `boost::system::system_category()'
collect2: error: ld returned 1 exit status

回答1:

If you place the linker directive -lboost_system at the end of the command line like so:

g++ -I"/home/third_party/boost/" -L"/usr/lib/x86_64-linux-gnu/" -Wall -m64 boost_async.cpp -o main -lboost_system

this should solve the problem. Thanks to Colin D Bennett and wesley.mesquita for clarifying this answer.