- Boost-users - lists.boost.org

Re: [Boost-users] Boost configure options for crosscompilation ?
by Hughes, James 22 Nov '06

22 Nov '06

This is the command line I used to build boost using Bjam for an arm platform, not sure if that helps with what you need, but here it is anyway!! bjam "-sGCC_ROOT_DIRECTORY=/opt/montavista/mobilinux/devkit/arm/iwmmxt_le" "-sGCC=iwmmxt_le-gcc" "-sGXX=iwmmxt_le-g++" stage Stage is the folder in which all the libs are placed, other parameters should be self explanatory. James > -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of MikeW > Sent: 20 November 2006 15:59 > To: boost-users(a)lists.boost.org > Subject: [Boost-users] Boost configure options for crosscompilation ? > > I would like to crosscompile Boost under Buildroot. > > I created what appeared to be a successful package file, but > found that the native compiler and tools were used rather > that Buildroot's crosscompiler toolchain. > > However, I could not see any other 'configure' options to > switch to using a crosscompiler (EPREFIX looked promising at > first but seems to be a path prefix, rather than a tool > prefix such as "arm-linux-"). > > I note an earlier post (unable to post a 'follow-up' to it) > seemed to successfully do a cross build. > > Could you tell me how Boost is 'configure'd to use the > crosstools rather than the native tools ? > > Thanks, > Mike > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > This message (including any attachments) contains confidential and/or proprietary information intended only for the addressee. Any unauthorized disclosure, copying, distribution or reliance on the contents of this information is strictly prohibited and may constitute a violation of law. If you are not the intended recipient, please notify the sender immediately by responding to this e-mail, and delete the message from your system. If you have any questions about this e-mail please notify the sender immediately.

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[regex] Conditional Replacement?
by Scott Meyers 22 Nov '06

22 Nov '06

If I want to replace all the regex matches in a string, no problem, regex_replace is just what I'm looking for. But suppose I want to replace each match only if some predicate is satisfied, e.g., to implement something like a string replacement in a text editor where the user is allowed to approve or reject each proposed replacement. Is there any direct support for something like this? The only way I can think of to do this is to iterate over the string to be searched, finding each match and then consulting the predicate to see if the replacement should be performed for that match. If so, I can call regex_replace on the found substring, but then I'll get back a new string, and I'll have to manually handle the process of knitting together the final revised string from the original string and the results of each substitution. This is essentially what regex_replace already does, except it unconditionally does a substitution for each match. What it seems I want is something like regex_replace_if. Is there such a thing in Boost or TR1? If not, is it because there is little demand for such functionality? That would surprise me, because pretty much every text editor allows one to iteratively search for a match and query the user to see if a replacement should be performed at that point. Thanks, Scott

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thread: not joinable?
by Robert Marion 21 Nov '06

21 Nov '06

Hi, I've written my first boost::thread application, and I get this assertion: /boost_1_33_1/libs/thread/src/thread.cpp:223: void boost::thread::join(): Assertion 'm_joinable' failed. I call the thread as: void _pollMode( Controller& ctrl ) { // do polling ... for my testing, left blank } void SomeClass::startPolling() { m_pCtrl = new Controller; boost::function<void (Controller&)> funcPoll; funcPoll = &_pollMode; m_thr = new boost:thread(boost::bind( funcPoll, *m_pCtrl)); // never get past this line (unless copy ctor modified) } The Controller class has a copy constructor defined, which gets called several times (by the thread class?) Controller( const Controller& ctrl ) { boost::mutex::scoped_lock lock( m_mutex ); m_thr = ctrl.m_thr; // bad ?? BUT ... if I do m_thr = NULL; then everything is ok. Why??? What's going on here??? } Any help/explanation would be appreciated. Rob ____________________________________________________________________________________ Sponsored Link Mortgage rates near 39yr lows. $420k for $1,399/mo. Calculate new payment! www.LowerMyBills.com/lre

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Statechart tutorial problem and possible solution
by Michael 21 Nov '06

21 Nov '06

I am going through the tutorial for Statechart. Going through the section "adding reactions", while debug build links fine, in a release mode linker issues following complaints: 1>FSM.obj : error LNK2001: unresolved external symbol "public: void __thiscall boost::statechart::detail::no_context::no_function<struct EvReset>(struct EvReset const &)" (??$no_function@UEvReset@@@no_context@detail@statechart@boost@@QAEXABUEvReset@@@Z) 1>FSM.obj : error LNK2001: unresolved external symbol "public: void __thiscall boost::statechart::detail::no_context::no_function<struct EvStartStop>(struct EvStartStop const &)" (??$no_function@UEvStartStop@@@no_context@detail@statechart@boost@@QAEXABUEvStartStop@@@Z) I ended up adding following line to my cpp file: template< class Event > void sc::detail::no_context::no_function( const Event & ) {}; and it cured the linker complaint. Michael

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Problem with sub_range
by abir basak 21 Nov '06

21 Nov '06

Hi, I am not sure if it is the proper newsgroup to get answers related to boost usage. I am facing a problem with boost::sub_range for a const container which is not allowing me to access the indexed operator. Below a short program to demonstrate the problem. Necessary headers are included. Boost version 1.33.1 typedef vector<int> VI; VI v(10); int data[] = {0,1,2,3,4,5,6,7,8,9}; copy(data,data+10,v.begin());///inserted a few int to std::vector<int> ///prints 0 1 2 3 4 5 6 7 8 9 copy(v.begin(),v.end(),ostream_iterator<int>(cout," ")); cout<<endl; const VI& cv = v; /// a const reference to the container. VI::iterator it = v.begin(); ///got an random access iterator it[1] = 100; /// index operator allows to change it copy(v.begin(),v.end(),ostream_iterator<int>(cout," ")); cout<<endl; ///prints 0 100 2 3 4 ... VI::const_iterator it1 = v.begin(); ///got a const_iterator cout<<it1[1]<<endl; /// returns const_reference, assignment is not allowed, access is allowed. prints 100 boost::sub_range<VI> r(v.begin()+2,v.begin()+8); ///got a sub_range ///prints 2 3 4 5 6 7 copy(r.begin(),r.end(),ostream_iterator<int>(cout," ")); cout<<endl; r[2] = 400; cout<<r[2]<<endl;/// prints 400 ///prints 2 3 400 5 6 7 copy(r.begin(),r.end(),ostream_iterator<int>(cout," ")); ///so far everything is fine. Here problem starts /// a const sub_range ? boost::sub_range<const VI> r1(cv.begin()+2,cv.begin()+8); ///prints 2 3 400 5 6 7 copy(r1.begin(),r1.end(),ostream_iterator<int>(cout," "));cout<<endl; ///next statement is don't compile cout<<r1[2]<<endl; ///=> not allowed gives error under Visual Studio 7.1 cannot convert from 'const std::allocator<_Ty>::value_type' to 'boost::iterator_range<IteratorT>::value_type &' Why it tried to convert it to value_type& instead of const value_type& ? cout<<typeid(r1.begin()).name()<<endl; says r1.begin() is a const_iteartor. So the statement cout<<r1[2]<<endl; should return a const_reference. Am I mis interpreting the const version of sub_range ? If so, what is a const counterpart of sub_range, which behaves just like a pair of const_iterator ? Any help is appreciated. Thanks abir

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[regex] compile errors on Mac OS X
by Richard Dingwall 21 Nov '06

21 Nov '06

Ran into a strange problem with boost::regex today. I get this just from including boost/regex.hpp: powerbook:~/Desktop/bre_test richard$ make g++ -pedantic -Wall -g -I/usr/local/include/boost-1_33_1/ -c -o bre_test.o bre_test.cpp /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp: In member function `bool boost::re_detail::perl_matcher<BidiIterator, Allocator, traits>::unwind_greedy_single_repeat(bool)': /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp:991: error: invalid conversion from 'boost::re_detail::re_syntax_base*' to 'long int' /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp:992: error: invalid conversion from 'boost::re_detail::re_syntax_base*' to 'long int' /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp: In member function `bool boost::re_detail::perl_matcher<BidiIterator, Allocator, traits>::unwind_slow_dot_repeat(bool)': /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp:1041: error: invalid conversion from 'boost::re_detail::re_syntax_base*' to 'long int' /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp:1042: error: invalid conversion from 'boost::re_detail::re_syntax_base*' to 'long int' /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp: In member function `bool boost::re_detail::perl_matcher<BidiIterator, Allocator, traits>::unwind_char_repeat(bool)': /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp:1159: error: invalid conversion from 'boost::re_detail::re_syntax_base*' to 'long int' /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp:1160: error: invalid conversion from 'boost::re_detail::re_syntax_base*' to 'long int' /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp: In member function `bool boost::re_detail::perl_matcher<BidiIterator, Allocator, traits>::unwind_short_set_repeat(bool)': /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp:1223: error: invalid conversion from 'boost::re_detail::re_syntax_base*' to 'long int' /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp:1224: error: invalid conversion from 'boost::re_detail::re_syntax_base*' to 'long int' /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp: In member function `bool boost::re_detail::perl_matcher<BidiIterator, Allocator, traits>::unwind_long_set_repeat(bool)': /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp:1288: error: invalid conversion from 'boost::re_detail::re_syntax_base*' to 'long int' /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp:1289: error: invalid conversion from 'boost::re_detail::re_syntax_base*' to 'long int' make: *** [bre_test.o] Error 1 powerbook:~/Desktop/bre_test richard$ A test case is attached. OS X version: Darwin powerbook.local 8.8.0 Darwin Kernel Version 8.8.0: Fri Sep 8 17:18:57 PDT 2006; root:xnu-792.12.6.obj~1/RELEASE_PPC Power Macintosh powerpc

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[program_options] replace environment variables in config file
by Chris Weed 21 Nov '06

21 Nov '06

Hi, I would like to be able to replace environment variables specified in config file values. For example I would like to use the env. var. (BOOST_PATH=c:\Boost) to expand the following file1=${BOOST_PATH}\include into this: file1=c:\Boost\include So I can then parse the value (c:\Boost\include) as a boost::filesystem::path. It seems like I want something similar to the extra parser for command-line options, but it doesn't seem to be possible for the config file parser. Do you have any ideas how to accomplish this? Also, is there a parser in program_options or property_tree that can parse "Java Property"-style property files, such as # My comment here cache=1kb file=c:/autoexec.bat Thanks, Chris

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How to avoid specifying the boost .libs in my MSVS 2003 projects?
by Joshua Stewart 21 Nov '06

21 Nov '06

I have a static lib that uses boost/regex.hpp. (boost version 1.33.1) However when I want to use my static lib and link into a separate executable project, I have to specify the libboost_regex-vc71-mt-gd-1_33_1.lib as an input library for the executable project, so that it can link correctly with the static lib. Otherwise I get linking errors. One solution might be to make my static lib a dll... but this is not on the cards at the moment. The boost headers on some systems will make use of a #pragma to do this linking for you. I thought that if I added #include <boost/regex.hpp> To a header in my executable project, that boost would automatically identify and link against the correct boost .lib and my static lib would link without errors also. I am trying to find a nice way that I can use boost in a static lib project in visual studio 2003, and then link that in a separate project without needing to specify to specific boost .lib that the static lib requires. Any help or suggestions are appreciated. Regards, Josh This message contains confidential information and is intended only for the individual(s) named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please immediately delete it and all copies of it from your system, destroy any hard copies of it, and notify the sender. E-mail transmission cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. To the maximum extent permitted by law, Immersive Technologies Pty. Ltd. does not accept liability for any errors or omissions in the contents of this message which arise as a result of e-mail transmission.

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Bug report in date_time, 1.33.0, not fixed in CVS
by Eric Teutsch 20 Nov '06

20 Nov '06

Boost::date_time uses FILETIME internally to get subsecond time resolution timestamps. When using date_time in a managed C++ environment, the compiler (VC7.1) can't differentiate between the windows global FILETIME, and the .NET System::Runtime::InteropServices::FILETIME, and therefore throws an error. If the boost header file microsec_time_clock.hpp (in boost/date_time) changes the types FILETIME to the global namespace ::FILETIME, then the naming collision goes away. This has only been tested in a limited arena, but I believe it should not affect other areas). Thank you Eric T. ________________________________________ I let my mind wander and it didn't come back.

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Re: [Boost-users] Beginner's shared_ptr question...
by Hughes, James 20 Nov '06

20 Nov '06

> void MyClass::init() > { > // either > spOther = shared_ptr<someOtherClass>(new someOtherClass(this)); or > spOther.reset(new someOtherClass(this)); } > > Dave. > -- > Dave Slutzkin > Melbourne, Australia > daveslutzkin(a)fastmail.fm Another beginners question... Are the two ways of doing this, as shown above, exactly the same? i.e. execute the same code and are therefore at the same cost, or is one more efficient than the other? James > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > This message (including any attachments) contains confidential and/or proprietary information intended only for the addressee. Any unauthorized disclosure, copying, distribution or reliance on the contents of this information is strictly prohibited and may constitute a violation of law. If you are not the intended recipient, please notify the sender immediately by responding to this e-mail, and delete the message from your system. If you have any questions about this e-mail please notify the sender immediately.

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