Undefined reference when Gcc compiling Boost::regex with multiple versions of boost exist
I was trying to install Boost on a linux machine(CentOs, Linux version 2.6.9-67.ELsmp). I followed with the instruction on Boost Getting Started webpage. Downloaded and extracted the files, then I add prefix because I am not the root user.
./bootstrap.sh --prefix=/my_path/boost-1.49.0
./b2 install
I go to /my_path/boost-1.49.0 and check there are /include/boost/ and /lib/ contain files there.
also I set LD_LIBRARY_PATH to /my_path/boost-1.49.0/lib/.
To test if I installed successfully, I compile the following code:
main.cpp
#include <boost/regex.hpp>
#include <iostream>
#include <string>
using namespace boost;
using namespace std;
int main(int argc, char *argv[])
{
string line = "12345";
regex pattern("^123");
if (regex_match(line, pattern)) cout << "match." << endl;
else cout << "not match." << endl;
return 1;
}
And compile by command:
g++ -v -I /my_path/boost-1.49.0/include/boost -L /my_path/boost-1.49.0/lib main.cpp -lboost_regex -o example
and generate following errors:
Reading specs from /usr/lib/gcc/x86_64-redhat-linux/3.4.6/specs
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-java-awt=gtk --host=x86_64-redhat-linux
Thread model: posix
gcc version 3.4.6 20060404 (Red Hat 3.4.6-9)
/usr/libexec/gcc/x86_64-redhat-linux/3.4.6/cc1plus -quiet -v -I /my_path/boost-1.49.0/include/boost/ -D_GNU_SOURCE main.cpp -quiet -dumpbase main.cpp -mtune=k8 -auxbase main -version -o /tmp/ccW0ON8y.s
ignoring nonexistent directory "/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../../../x86_64-redhat-linux/include"
#include "..." search starts here:
#include <...> search starts here:
/my_path/boost-1.49.0/include/boost/
/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../../../include/c++/3.4.6
/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../../../include/c++/3.4.6/x86_64-redhat-linux
/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../../../include/c++/3.4.6/backward
/usr/local/include
/usr/lib/gcc/x86_64-redhat-linux/3.4.6/include
/usr/include
End of search list.
GNU C++ version 3.4.6 20060404 (Red Hat 3.4.6-9) (x86_64-redhat-linux)
compiled by GNU C version 3.4.6 20060404 (Red Hat 3.4.6-9).
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
as -V -Qy -o /tmp/ccpu82sB.o /tmp/ccW0ON8y.s
GNU assembler version 2.15.92.0.2 (x86_64-redhat-linux) using BFD version 2.15.92.0.2 20040927
/usr/libexec/gcc/x86_64-redhat-linux/3.4.6/collect2 --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o example /usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../../../lib64/crt1.o /usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../../../lib64/crti.o /usr/lib/gcc/x86_64-redhat-linux/3.4.6/crtbegin.o -L /my_path/boost-1.49.0/lib/ -L/usr/lib/gcc/x86_64-redhat-linux/3.4.6 -L/usr/lib/gcc/x86_64-redhat-linux/3.4.6 -L/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../../../lib64 -L/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../.. -L/lib/../lib64 -L/usr/lib/../lib64 /tmp/ccpu82sB.o -lboost_regex -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /usr/lib/gcc/x86_64-redhat-linux/3.4.6/crtend.o /usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../../../lib64/crtn.o
/tmp/ccpu82sB.o(.gnu.linkonce.t._ZN5boost11basic_regexIcNS_12regex_
traitsIcEESaIcEEC1EPKcjRKS3_+0x27): In function `boost::basic_regex<char,
boost::regex_traits<char>, std::allocator<char> >::basic_regex(char const*,
unsigned int, std::allocator<char> const&)'::
undefined reference to `boost::reg_expression<char, boost::regex_traits<char>,
std::allocator<char> >::reg_expression(char const*, unsigned int,
std::allocator<char> const&)'
/tmp/ccpu82sB.o(.gnu.linkonce.t.
_ZN5boost11basic_regexIcNS_12regex_traitsIcEESaIcEED1Ev+0x11): In function
`boost::basic_regex<char, boost::regex_traits<char>,
std::allocator<char>>::~basic_regex()':
: undefined reference to `boost::reg_expression<char, boost::regex_traits<char>,
std::allocator<char> >::~reg_expression()'
/tmp/ccpu82sB.o(.gnu.linkonce.t.
_ZN5boost9re_detail12perl_matcherIN9__gnu_cxx17__normal_iteratorIPKcSsEESaINS_9sub
_matchIS6_EEENS_12regex_traitsIcEESaIcEEC1ES6_S6_RNS_13match_resultsIS6_S9_EERKNS_
14reg_expressionIcSB_SC_EENS_15regex_constants12_match_flagsE+0xa1): In function
`boost::re_detail::perl_matcher<__gnu_cxx::__normal_iterator<char const*,
std::basic_string<char, std::char_traits<char>, std::allocator<char> > >,
std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*,
std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >,
boost::regex_traits<char>, std::allocator<char>>
::perl_matcher(__gnu_cxx::__normal_iterator<char const*, std::basic_string<char,
std::char_traits<char>, std::allocator<char> > >, __gnu_cxx::__normal_iterator<char
const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >,
boost::match_results<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char,
std::char_traits<char>, std::allocator<char> > >,
std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*,
std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >&,
boost::reg_expression<char, boost::regex_traits<char>, std::allocator<char> > const&,
boost::regex_constants::_match_flags)':
however if I just compile with default boost that system administer installed
g++ -v main.cpp -lboost_regex -o example
Then it's fine.
ldd example I got
libboost_regex.so.1 => /usr/lib64/libboost_regex.so.1 (0x0000002a95557000)
Due to some reason the I am asked not to update the boost in /usr/include/boost. Is there anything that can help me solve with this problem that install boost in a local folder and just change the path how to include and link to use different versions?
I am not sure if this question is dumb or not, but I did search with google but mostly related questions are not properly set -I, -L and -l in gcc command. I have no idea of the error message above, really drive me mad. Any help is appreciated.
Thanks for your patience and time.
Answer
Maybe it's because in your compile command, you said to use /my_path/boost-1.49.0/include/boost as include path and then, in your source code you #include <boost/regex.hpp>.
My guess is that regex.hpp is searched in /my_path/boost-1.49.0/include/boost/boost/regex.hpp. It is obviously not found, so system one is found.
Could you try with :
g++ -v -I /my_path/boost-1.49.0/include -L /my_path/boost-1.49.0/lib main.cpp -lboost_regex -o example