April 2003 - Boost-users - lists.preview.boost.org

undefined reference to boost::random_device::default_token
by agiatojon 02 Apr '03

02 Apr '03

Hello all, I am attempting to use the non-deterministic random number generator class contined in boost::random and have encountered the following errors upon running the program. The program does compile without errors, and I am using KDevelop 2.1.3 in the RedHat Linux 8.0 environment. Here's the offending code: #include <iostream> #include <cstdlib> #include <boost/nondet_random.hpp> int main() { boost::random_device dev; return EXIT_SUCCESS; } I receive the following error message: /home/JAgiato/boosttest/boosttest/main.cpp:6: undefined reference to `boost::random_device::default_token' /home/JAgiato/boosttest/boosttest/main.cpp:6: undefined reference to `boost::random_device::random_device[in-charge](std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)' /home/JAgiato/boosttest/boosttest/main.cpp:8: undefined reference to `boost::random_device::~random_device [in-charge]()' My goal is to use this class to produce non-deterministic 32 bit integers which will be streamed to a binary file. Any help is greatly apprechiated! Thank you! Jon Agiato JonAgiato(a)nyc.rr.com

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containers of boost::function objects
by Alisdair Meredith 02 Apr '03

02 Apr '03

I am trying to create a simple mechanism to register multiple callbacks with my class. My first simple-minded approach is to use std::list< boost::function2< [my params]> > Unfortunately, I cannot search this list to unregister callbacks, as any attempt to dereference a list::iterator tries to call the function, rather than return the function object. After spotting this problem in the standard algorithms I have been trying to hack around myself, explicitly calling operator* and even operator-> with no joy. Am I missing some easy way to get the function object out of the iterator as a value? And is this a bug in my compiler (BCB6) or a general issue for containers of function objects? -- AlisdairM

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Compiling with Forte 7 generates Assertion errors - help?
by Chris Hackett 01 Apr '03

01 Apr '03

Hello, I am trying to build Boost with the Forte compiler and am getting many Assertion errors. I tried the same things Robert Reece tried (see Subject: type_traits/is_convertible crashes Forte 6.2u2 and Forte 7.0) and get the same results he described. I am using Forte 7, Solaris 8, and the latest version of Boost (1.30). My main.cpp file looks like: #include "boost/type_traits/detail/size_t_trait_def.hpp" // Try using the BOOST_TT_AUX_SIZE_T_TRAIT_DEF1 macro. namespace boost { BOOST_TT_AUX_SIZE_T_TRAIT_DEF1(alignment_of,T,::boost::detail::alignment_of_impl<T>::value) } // namespace boost int main( void ) { return 0; } and I compile with: CC -I$BOOST_DIR main.cpp The compiler prints an error: >> Assertion: (../lnk/init.cc, line 991) while processing main.cpp at line 3. The problems appear to be related to the use of BOOST_TT_AUX_SIZE_T_TRAIT_DEF1 and other similar #define macros. Has anyone come up with any work-arounds or solutions? You can email me at hackett_bae(a)yahoo.com. Thanks, Chris. __________________________________________________ Do you Yahoo!? Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop! http://platinum.yahoo.com

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regex++ use on binary data
by brian_hernacki 01 Apr '03

01 Apr '03

Maybe a newbiew question, but is there any way to use the regex++ libary to search chunks of binary data? (or more accurately to search a buffer of data of known length for a given pattern which may itself contain null bytes) --brian

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linking Signals Library
by John Fletcher 01 Apr '03

01 Apr '03

System: Red Hat 8.0 with gcc 3.2 Boost 1_30_0 I have built the boost signals library using bjam. The test suite runs and passes all tests. How do I make the resulting libraries available to my own programs? Is there an equivalent of 'make install' which will move the results to somewhere from which linking is possible? I have searched the documentation on Boost Signal and also on building libraries and have found nothing on this. Thanks John Fletcher

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[Signals-1.30.0] Linking problems
by Michael Kettner 01 Apr '03

01 Apr '03

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, I've got problems in linking against the signals-library. I built the library defining <define>BOOST_SIGNALS_NAMESPACE=boost_signals and running bjam -sTOOLS=gcc-stlport -sBUILD=release Everythinig seemed to work fine, but when I now try to link against the shared library (see attached file), I get the following undefined references: undefined reference to `boost::boost_signals::detail::signal_base_impl::connect_slot(boost::any const&, boost::any const&, _STL::vector<boost::boost_signals::trackable const*, _STL::allocator<boost::boost_signals::trackable const*> > const&)' and undefined reference to `boost::boost_signals::detail::signal_base_impl::signal_base_impl[in-charge](boost::function2<bool, boost::any, boost::any, _STL::allocator<boost::function_base> > const&)' I'm using gcc-3.2.2 and STLport-4.5.3. May it be the case that something with the STL-namespace (std) went wrong? Thanks for any help, Michael - -- Dipl.-Ing. Michael Kettner, Wissenschaftlicher Mitarbeiter Institut für Verkehrswesen, Eisenbahnbau und -betrieb, Universitaet Hannover Appelstr. 9A # Tel: ++49/(0)511/762-4273 D-30167 Hannover # Fax: ++49/(0)511/762-3001 http://www.ive.uni-hannover.de # kettner(a)ive.uni-hannover.de -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE+iIILkCdGnb0kVFMRAtewAJ9+MNdRW7hs4vHHbmnuashsi22d8gCaAm8W N8FnJqbRHiqU3S0EKDixD0U= =qEMK -----END PGP SIGNATURE----- [Non-text portions of this message have been removed]

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