Error when compiling C++ #1
Comments
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Hello,
On Tue, Nov 21, 2017 at 07:22:09PM +0000, mcaron1234 wrote:
I am getting an error when I try compiling the
C++ version. Can you spot my mistake?
I'm sorry, I hasn't read my email for about a
month. I see that you have deprecation warnings
about session() constructor, set_settings(),
pop_alerts() and get_torrent_info(). Which version
of libtorrent-rasterbar do you use? I use (on a
stable Devuan system which is roughly equivalent
to oldstable Debian):
* libtorrent-rasterbar-dev 0.16.18-1
* libboost1.55-dev 1.55.0+dfsg-3
* gcc/g++ 4:4.9.2-2
Then, the real problem is during linking phase:
"undefined reference to ..session_settings(...)"
and to a lot of other funcions... Typically this
is a problem with linker flags and IIRC with
-DBOOST_ASIO_SEPARATE_COMPILATION vs
-DBOOST_ASIO_DYN_LINK, but you have
"-DBOOST_ASIO_DYN_LINK" and "-ltorrent-rasterbar"
all right...
I think I have to check it with more recent
versions of boost, libtorrent-rasterbar and gcc.
I'll try it on Gentoo and write to you.
…--
With best regards,
Alexander
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A followup:
On Tue, Nov 21, 2017 at 07:22:09PM +0000, mcaron1234 wrote:
I am getting an error when I try compiling the
C++ version. Can you spot my mistake?
***@***.***:~/Downloads/dev/mag2tor$ sudo make
g++ -std=c++11 -DBOOST_ASIO_DYN_LINK -lstdc++ -lboost_system -ltorrent-rasterbar mag2tor.cpp -o mag2tor
I tried building mag2tor on fresh Gentoo system
and got the next results:
1. all of the same deprecation warnings as you had
2. building with -DBOOST_ASIO_DYN_LINK resulted in
3 undefined references
3. -DBOOST_ASIO_SEPARATE_COMPILATION resulted in
the same 3 unresolved references
4. building with neiher -DBOOST_ASIO_DYN_LINK nor
-DBOOST_ASIO_SEPARATE_COMPILATION succeded.
So my recommendation is the next: edit Makefile
and try building with
a) CXXFLAGS=-std=c++11
or
b) CXXFLAGS=-std=c++11 -DBOOST_ASIO_SEPARATE_COMPILATION
And of course try building as ordinary user, not
root (sudo is not necessary).
I suspect that your libboost and
libtorrent-rasterbar might have been built with
different c++ "standard". On Gentoo, -std=c++14
will be used by default with new 17.0 system
profiles. Maybe you should also try:
c) CXXFLAGS=-std=c++14
d) CXXFLAGS=-std=c++14 -DBOOST_ASIO_DYN_LINK
e) CXXFLAGS=-std=c++14 -DBOOST_ASIO_SEPARATE_COMPILATION
On my Gentoo both a) and c) work OK and look the
same though...
…--
With best regards,
Alexander
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I am getting an error when I try compiling the C++ version. Can you spot my mistake?
matt@apollo:~/Downloads/dev/mag2tor$ sudo make g++ -std=c++11 -DBOOST_ASIO_DYN_LINK -lstdc++ -lboost_system -ltorrent-rasterbar mag2tor.cpp -o mag2tor mag2tor.cpp: In function ‘int main(int, char**)’: mag2tor.cpp:94:36: warning: ‘libtorrent::session::session(const libtorrent::fingerprint&, int, uint32_t)’ is deprecated [-Wdeprecated-declarations] lt::session::add_default_plugins); ^ In file included from mag2tor.cpp:16:0: /usr/include/libtorrent/session.hpp:205:3: note: declared here session(fingerprint const& print ^~~~~~~ mag2tor.cpp:95:24: warning: ‘void libtorrent::session_handle::set_settings(const libtorrent::session_settings&)’ is deprecated [-Wdeprecated-declarations] sess.set_settings(sset); ^ In file included from /usr/include/libtorrent/session.hpp:53:0, from mag2tor.cpp:16: /usr/include/libtorrent/session_handle.hpp:808:8: note: declared here void set_settings(session_settings const& s); ^~~~~~~~~~~~ mag2tor.cpp:114:26: warning: ‘void libtorrent::session_handle::pop_alerts(std::deque<libtorrent::alert*>*)’ is deprecated [-Wdeprecated-declarations] sess.pop_alerts(&alerts); ^ In file included from /usr/include/libtorrent/session.hpp:53:0, from mag2tor.cpp:16: /usr/include/libtorrent/session_handle.hpp:916:8: note: declared here void pop_alerts(std::deque<alert*>* alerts); ^~~~~~~~~~ mag2tor.cpp:126:27: warning: ‘const libtorrent::torrent_info& libtorrent::torrent_handle::get_torrent_info() const’ is deprecated [-Wdeprecated-declarations] torh.get_torrent_info(); ^ In file included from /usr/include/libtorrent/alert_types.hpp:38:0, from mag2tor.cpp:12: /usr/include/libtorrent/torrent_handle.hpp:920:23: note: declared here const torrent_info& get_torrent_info() const; ^~~~~~~~~~~~~~~~ /tmp/cciTCjJL.o: In functionmain':mag2tor.cpp:(.text+0x1ab): undefined reference to
libtorrent::session_settings::session_settings(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)' mag2tor.cpp:(.text+0x1dc): undefined reference tolibtorrent::default_storage_constructor(libtorrent::storage_params const&)'mag2tor.cpp:(.text+0x43d): undefined reference to
libtorrent::session_handle::set_settings(libtorrent::session_settings const&)' mag2tor.cpp:(.text+0x467): undefined reference tolibtorrent::disabled_storage_constructor(libtorrent::storage_params const&)'mag2tor.cpp:(.text+0x4ae): undefined reference to
libtorrent::session_handle::add_torrent(libtorrent::add_torrent_params const&)' mag2tor.cpp:(.text+0x501): undefined reference tolibtorrent::session_handle::pop_alerts(std::deque<libtorrent::alert*, std::allocatorlibtorrent::alert* >)'mag2tor.cpp:(.text+0x665): undefined reference to
libtorrent::torrent_handle::status(unsigned int) const' mag2tor.cpp:(.text+0x67b): undefined reference tolibtorrent::torrent_status::~torrent_status()'mag2tor.cpp:(.text+0x692): undefined reference to
libtorrent::session_handle::pause()' mag2tor.cpp:(.text+0x6a1): undefined reference tolibtorrent::torrent_handle::get_torrent_info() const'mag2tor.cpp:(.text+0x6b6): undefined reference to
libtorrent::torrent_info::torrent_info(libtorrent::torrent_info const&)' mag2tor.cpp:(.text+0x7b6): undefined reference tolibtorrent::create_torrent::create_torrent(libtorrent::torrent_info const&)'mag2tor.cpp:(.text+0x7cf): undefined reference to
libtorrent::create_torrent::generate() const' mag2tor.cpp:(.text+0x810): undefined reference tolibtorrent::entry::~entry()'mag2tor.cpp:(.text+0x81f): undefined reference to
libtorrent::create_torrent::~create_torrent()' mag2tor.cpp:(.text+0x84c): undefined reference tolibtorrent::session_handle::remove_torrent(libtorrent::torrent_handle const&, int)'mag2tor.cpp:(.text+0x86b): undefined reference to
libtorrent::torrent_info::~torrent_info()' mag2tor.cpp:(.text+0x910): undefined reference tolibtorrent::session::~session()'mag2tor.cpp:(.text+0x92e): undefined reference to
libtorrent::session_settings::~session_settings()' mag2tor.cpp:(.text+0x9ca): undefined reference tolibtorrent::entry::~entry()'mag2tor.cpp:(.text+0x9de): undefined reference to
libtorrent::create_torrent::~create_torrent()' mag2tor.cpp:(.text+0xa06): undefined reference tolibtorrent::torrent_info::~torrent_info()'mag2tor.cpp:(.text+0xa42): undefined reference to
libtorrent::session::~session()' mag2tor.cpp:(.text+0xa6a): undefined reference tolibtorrent::session_settings::~session_settings()'/tmp/cciTCjJL.o: In function
__static_initialization_and_destruction_0(int, int)': mag2tor.cpp:(.text+0xae7): undefined reference toboost::system::generic_category()'mag2tor.cpp:(.text+0xaf3): undefined reference to
boost::system::generic_category()' mag2tor.cpp:(.text+0xaff): undefined reference toboost::system::system_category()'mag2tor.cpp:(.text+0xb17): undefined reference to
boost::asio::error::get_netdb_category()' mag2tor.cpp:(.text+0xb23): undefined reference toboost::asio::error::get_addrinfo_category()'mag2tor.cpp:(.text+0xb2f): undefined reference to
boost::asio::error::get_misc_category()' /tmp/cciTCjJL.o: In functionboost::asio::error::get_system_category()':mag2tor.cpp:(.text._ZN5boost4asio5error19get_system_categoryEv[_ZN5boost4asio5error19get_system_categoryEv]+0x5): undefined reference to
boost::system::system_category()' /tmp/cciTCjJL.o: In functionlibtorrent::session::session(libtorrent::fingerprint const&, int, unsigned int)':mag2tor.cpp:(.text._ZN10libtorrent7sessionC2ERKNS_11fingerprintEij[_ZN10libtorrent7sessionC5ERKNS_11fingerprintEij]+0x83): undefined reference to
libtorrent::ipv6_deprecated_()' mag2tor.cpp:(.text._ZN10libtorrent7sessionC2ERKNS_11fingerprintEij[_ZN10libtorrent7sessionC5ERKNS_11fingerprintEij]+0xac): undefined reference tolibtorrent::settings_pack::set_int(int, int)'mag2tor.cpp:(.text._ZN10libtorrent7sessionC2ERKNS_11fingerprintEij[_ZN10libtorrent7sessionC5ERKNS_11fingerprintEij]+0xda): undefined reference to
libtorrent::settings_pack::set_str(int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)' mag2tor.cpp:(.text._ZN10libtorrent7sessionC2ERKNS_11fingerprintEij[_ZN10libtorrent7sessionC5ERKNS_11fingerprintEij]+0x10c): undefined reference tolibtorrent::settings_pack::set_bool(int, bool)'mag2tor.cpp:(.text._ZN10libtorrent7sessionC2ERKNS_11fingerprintEij[_ZN10libtorrent7sessionC5ERKNS_11fingerprintEij]+0x125): undefined reference to
libtorrent::settings_pack::set_bool(int, bool)' mag2tor.cpp:(.text._ZN10libtorrent7sessionC2ERKNS_11fingerprintEij[_ZN10libtorrent7sessionC5ERKNS_11fingerprintEij]+0x13e): undefined reference tolibtorrent::settings_pack::set_bool(int, bool)'mag2tor.cpp:(.text._ZN10libtorrent7sessionC2ERKNS_11fingerprintEij[_ZN10libtorrent7sessionC5ERKNS_11fingerprintEij]+0x157): undefined reference to
libtorrent::settings_pack::set_bool(int, bool)' mag2tor.cpp:(.text._ZN10libtorrent7sessionC2ERKNS_11fingerprintEij[_ZN10libtorrent7sessionC5ERKNS_11fingerprintEij]+0x178): undefined reference tolibtorrent::session::start(int, libtorrent::settings_pack const&, boost::asio::io_service)'/tmp/cciTCjJL.o: In function
int libtorrent::detail::bencode_recursive<std::ostream_iterator<char, char, std::char_traits<char> > >(std::ostream_iterator<char, char, std::char_traits<char> >&, libtorrent::entry const&)': mag2tor.cpp:(.text._ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE[_ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE]+0x2f): undefined reference tolibtorrent::entry::type() const'mag2tor.cpp:(.text._ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE[_ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE]+0x78): undefined reference to
libtorrent::entry::integer() const' mag2tor.cpp:(.text._ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE[_ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE]+0xb3): undefined reference tolibtorrent::entry::stringabi:cxx11 const'mag2tor.cpp:(.text._ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE[_ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE]+0xed): undefined reference to
libtorrent::entry::string[abi:cxx11]() const' mag2tor.cpp:(.text._ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE[_ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE]+0x128): undefined reference tolibtorrent::entry::listabi:cxx11 const'mag2tor.cpp:(.text._ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE[_ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE]+0x140): undefined reference to
libtorrent::entry::list[abi:cxx11]() const' mag2tor.cpp:(.text._ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE[_ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE]+0x1c9): undefined reference tolibtorrent::entry::dictabi:cxx11 const'mag2tor.cpp:(.text._ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE[_ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE]+0x1e1): undefined reference to
libtorrent::entry::dict[abi:cxx11]() const' mag2tor.cpp:(.text._ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE[_ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE]+0x2d3): undefined reference tolibtorrent::entry::preformatted() const'mag2tor.cpp:(.text._ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE[_ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE]+0x2ea): undefined reference to
libtorrent::entry::preformatted() const' mag2tor.cpp:(.text._ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE[_ZN10libtorrent6detail17bencode_recursiveISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_RKNS_5entryE]+0x317): undefined reference tolibtorrent::entry::preformatted() const'/tmp/cciTCjJL.o: In function
int libtorrent::detail::write_integer<std::ostream_iterator<char, char, std::char_traits<char> > >(std::ostream_iterator<char, char, std::char_traits<char> >&, long)': mag2tor.cpp:(.text._ZN10libtorrent6detail13write_integerISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_l[_ZN10libtorrent6detail13write_integerISt16ostream_iteratorIccSt11char_traitsIcEEEEiRT_l]+0x37): undefined reference tolibtorrent::detail::integer_to_str(char*, int, long)'collect2: error: ld returned 1 exit status
: recipe for target 'mag2tor' failed
make: *** [mag2tor] Error 1
`
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