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Installing boost.mpi on Cray system
by khaled hamidouche 21 Jun '11

21 Jun '11

Hello I'm trying to install boost and its MPI bindings on a Cray XE6 and this is what I get after adding using mpi ; to user-config.jam: MPI auto-detection failed: unknown wrapper compiler<http://omgili.com/mailinglist/boost-users/lists/boost/org/4BC2BA3E2040204he…> /opt/cray/xt-asyncpe/4.9/bin/CC or MPI auto-detection failed: unknown wrapper compiler mpic++ (mpic++ -bash: mpic++: command not found) If I understand correctly boost only checks for mpicc and related executables and also tries mpirun. None of these are supposed to be used on an XE6 The compiler commands to use are cc, CC and ftn. More information for I think the same machine: https://www.nersc.gov/users/getting-started/<http://www.csc.fi/english/pages/louhi_guide/program_development/compilers/i…> these compiler cc, CC and ftn are using directly to compile an MPI program (don't use mpiCC to compile) Actually CC is using the GNU compiler module switch PrgEnv-pgi PrgEnv-gnu CC --version /opt/cray/xt-asyncpe/4.9/bin/CC: INFO: Compiling with XTPE_COMPILE_TARGET=native. g++ (GCC) 4.5.2 20101216 (Cray Inc.) I need to build boost mpi with this compiler (CC). How can I make bjam do that?? Thank you K.H

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mpl pow10 sequence
by Olaf Peter 21 Jun '11

21 Jun '11

Hi, my first steps in mpl :>) I try to build a sequence/vector of pow10 sequence of integers and access them by index at runtime. See the last line of a concept usage. The range of exponents are in range [0..7] so the mpl::vector7 would be appropriate. Anyway, I don't get a compile able version using mpl's next, fold etc. How can I get this? Thanks, Olaf

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How to bjam program_options correctly for VC++ 9 (Visual Studio 2008)?
by Petr Přikryl 21 Jun '11

21 Jun '11

Hi, I am very new to this mailing list. I tried to search the archive, but I did not find the answer... So far, I do use only BOOST_FOREACH and regex from the boost in our application. However, I am planning to extend the usage. My question is how to use the bjam correctly to compile a module for Microsoft Windows using the VC++ 9 (Visual Studio 2008)? My boost bakground... My previous experience is only with compilation of the regex. However, there are makefiles prepared for compilation by the Visual Studio C++ versions (like vc9.mak). It seems to me that bjam is prefered, and should be used whenever possible. I did download the boost_1_46_1.zip and unzipped it to d:usrboost_1_46_1 directory. Then I have followed the advice from somwhere in the doc and launched the d:usrboost_1_46_1bootstrap.bat The compilation went successfully and the d:usrboost_1_46_1bjam.exe appeared there. I did move it to the d:usrbin -- that directory is in my path. Now, I would like to know how and from where I should launch the bjam.exe to obtain the compiled libraries. Actually, I did some moves and I got some libs; however, I would like to better understand what I am doing. For example, I did compile the regex. But the libraries had the _1_46_1 in the name while the linker later expected to find only _1_46 in the name. I am afraid I do not understand more details. I tried some tutorials, but they are or too focused on something or too general (too much info). Please, can you focus on what exactly should be done for the program_options and for the regex? Thank you, Petr

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Executable wrapped into another one: how to pass streams instead of real files?
by Alessandro Candini 21 Jun '11

21 Jun '11

I give you a simplified example to explain what I would like to do. I have the following code, which I cannot modify (hello.cpp): |#include <iostream> #include <fstream> using namespace std; int main( int argc, char *argv[] ) { string line; ifstream f( argv[1] ); while(!f.eof()) { getline(f, line); cout << line << endl; } return 0; } Launch example: ||caneta@host ~ $ ./hello myfile.txt 1 - This is 2 - a test 3 - file. I have a wrapper program which I need to modify: ||#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <iostream> #include <fstream> #include <sstream> using namespace std; int main () { int ret; ret = execl ("./hello", "./hello", "myfile.txt", (char *)0); return 0; }| In this way it works perfectly...but how can I modify it in order to use a stream or a string inside the wrapper program, instead of using a file name? I would like to have something like: |#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <iostream> #include <fstream> #include <sstream> using namespace std; int main () { int ret; ifstream inputFile; inputFile << "1 - This is" << endl; inputFile << "2 - a test" << endl; inputFile << "3 - file." << endl; ret = execl ("./hello", "./hello", inputFile, (char *)0); return 0; }| This last example, of course, doesn't work...how can I modify it in order to make it work? Remember that I cannot modify hello.cpp... Can the Boost.iostreams help me? Thanks in advance. -- Alessandro Candini MEEO S.r.l. Via Saragat 9 I-44122 Ferrara, Italy Tel: +39 0532 1861501 Fax: +39 0532 1861637 http://www.meeo.it ======================================== "ATTENZIONE:le informazioni contenute in questo messaggio sono da considerarsi confidenziali ed il loro utilizzo è riservato unicamente al destinatario sopra indicato. Chi dovesse ricevere questo messaggio per errore è tenuto ad informare il mittente ed a rimuoverlo definitivamente da ogni supporto elettronico o cartaceo." "WARNING:This message contains confidential and/or proprietary information which may be subject to privilege or immunity and which is intended for use of its addressee only. Should you receive this message in error, you are kindly requested to inform the sender and to definitively remove it from any paper or electronic format."

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how does one build documentation for one library
by Robert Ramey 21 Jun '11

21 Jun '11

I'm interested in trying out quickbook documentation build system. To this I have studied this page. https://svn.boost.org/trac/boost/wiki/BoostDocs/GettingStarted#Howtotestyou… I've built quickbook and downloaded the other tools. I would like to test the system on one library and not occupy my system for hours trying to do this. The section How to test your build setup says: There is a set of test documentation that covers all the tools that can be used in the boost-root/doc/test directory. Building this requires quickbook, doxygen, latex, dvips and ps as well as the basic Boostbook setup. But it doesn't say what command to invoke nor what directory to invoke it from. What I would like to do is: a) cd to the library I'm interested int. eg cd c:/boostrelease/libs/fusion b) bjam html and have it build a subdirectory html (or maybe doc/html) with all the html files in it. How can I do this? Robert Ramey

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lexical_cast and float
by Claude 20 Jun '11

20 Jun '11

Hi! I use this code to control if a sdt::string is a "float" value: string value("3.14"); try { lexical_cast<float>(value); } catch(bad_lexical_cast& ) { cout<<value<<" is not a float number\n"; } I always obtain a bad_lexical_cast exception. Why? -- View this message in context: http://boost.2283326.n4.nabble.com/lexical-cast-and-float-tp3609634p3609634… Sent from the Boost - Users mailing list archive at Nabble.com.

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Serialization: how to inject context into save/load free functions?
by Michael Schuerig 20 Jun '11

20 Jun '11

I have a POD struct that I de/serialize through appropriately overloaded save and load free functions[*]. In my case, de/serialization involves translating between different representations (uid <-> username, gid <-> groupname). This translation is encapsulated in a class Etc and currently I just have a local variable of class Etc in both methods. I'd prefer a way to inject the Etc instance into save and load. The ideal solution would meet these criteria: * The Etc instance is created externally to save/load. * No global or quasi-global (static or singleton) variables. * No changes to the serialized struct (i.e. not an additional pointer to an Etc instance). * Usable with existing archive classes without extension. As far as I can tell, so far, I can't get all of these. I'm hoping that there is a way that I have overlooked. Michael [*] https://github.com/mschuerig/preserfs/blob/master/src/DirectoryMetadata.cpp… -- Michael Schuerig mailto:michael@schuerig.de http://www.schuerig.de/michael/

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Boost.Preprocessor: expansion stops, result is further expandable
by Roman Neuhauser 20 Jun '11

20 Jun '11

Hello, I'd like to thank everybody involved in creation of Boost.Preprocessor for this cool piece of software, it does wonders. I have a possibly naive question (I'm an autodidact) which involves Boost.PP. I have stumbled upon strange behavior where the preprocessor stops expanding but the output expands further if fed to the preprocessor again. Given these directives: #include <boost/preprocessor.hpp> # #define DAPHP_REGISTER_CLASS(class_, props) \ CXXEXT_REGISTER_CLASS( \ class_ \ , BOOST_PP_SEQ_TRANSFORM(DAPHP_MAKE_PROPERTY, ~, props) \ ) # #define DAPHP_MAKE_PROPERTY(_, __, name) \ (name, IS_LONG, 0) # #define CXXEXT_REGISTER_CLASS(class_, props) \ object< class_ >::register_(); \ CXXEXT_DECLARE_PROPERTIES(class_, props) # #define CXXEXT_DECLARE_PROPERTIES(class_, props) \ BOOST_PP_SEQ_FOR_EACH( \ CXXEXT_DECLARE_PROPERTY_SEQ \ , ~ \ , BOOST_PP_SEQ_TRANSFORM(CXXEXT_PROPERTY_ADD_CLASS, class_, props) \ ) # #define CXXEXT_PROPERTY_ADD_CLASS(_, class_, prop) \ BOOST_PP_ARRAY_DATA(BOOST_PP_ARRAY_PUSH_FRONT((3, prop), class_)) # #define CXXEXT_DECLARE_PROPERTY_SEQ(_, __, elem) \ BOOST_PP_EXPAND(CXXEXT_DECLARE_PROPERTY elem) # #define CXXEXT_DECLARE_PROPERTY(native_type, name, ztype_, default_) \ object< native_type >::declare_property( \ ZEND_ACC_PUBLIC \ , ztype_ \ , BOOST_PP_STRINGIZE(name) \ , default_ \ ); # #define DAPHP_PROPS_DATE (year) (month) (day) This: DAPHP_REGISTER_CLASS(DapiDate, DAPHP_PROPS_DATE) Expands to (newlines added): object< DapiDate >::register_(); object< DapiDate >::declare_property( ZEND_ACC_PUBLIC , IS_LONG , "year" , 0 ); object< DapiDate >::declare_property( ZEND_ACC_PUBLIC , IS_LONG , "month" , 0 ); object< DapiDate >::declare_property( ZEND_ACC_PUBLIC , IS_LONG , "day" , 0 ); With these definitions added to the mix: #define DAPHP_REGISTER_CLASSES(classes) \ BOOST_PP_SEQ_FOR_EACH( \ DAPHP_REGISTER_CLASS_SEQ \ , ~ \ , classes \ ) # #define DAPHP_REGISTER_CLASS_SEQ(_, __, classprops) \ DAPHP_REGISTER_CLASS( \ BOOST_PP_TUPLE_ELEM(2, 0, classprops) \ , BOOST_PP_TUPLE_ELEM(2, 1, classprops) \ ) This: DAPHP_REGISTER_CLASSES( ((DapiDate, DAPHP_PROPS_DATE)) ) Expands to (newlines added): object< DapiDate >::register_(); BOOST_PP_SEQ_FOR_EACH( CXXEXT_DECLARE_PROPERTY_SEQ , ~ , ((DapiDate, year, IS_LONG, 0)) ((DapiDate, month, IS_LONG, 0)) ((DapiDate, day, IS_LONG, 0)) ) Which is an intermediate expansion of the above listed DAPHP_REGISTER_CLASS(DapiDate, DAPHP_PROPS_DATE). g++ 4.5.0 (MinGW) and MSVC 9 Express behave the same, which makes me believe this is a PEBKAC, but I just don't see it. Why doesn't DAPHP_REGISTER_CLASSES expand all the way as DAPHP_REGISTER_CLASS does? Please enlighten me. -- roman

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Request for an addition in Boost Coding standard
by Gokulakannan Somasundaram 19 Jun '11

19 Jun '11

Hi, We have a custom memory allocator and we don't do global operator new/delete override for the obvious reasons. While the container classes being provided by Boost get the allocator as a template arguments, there are a lot of classes which do contain string and vector inside them, but don't provide the allocator as template arguments. May i request to have a coding standard to provide allocators as template arguments in all the classes that maintain private heap directly /indirectly( through the other containers )? To name a few, i saw the implementation of Boost Format, which provides the allocator for string, but not for the vectors. I also looked at the Boost filesystem, which has a string inside, but restricts itself to std::allocator. Thanks, Gokul.

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[preprocessor] using ENUM_PARAMS to generate macro call arguments
by Krzysztof Czainski 18 Jun '11

18 Jun '11

Hello, I'll try to illustrate what I am trying to do on this example: #define VER 1 // given alternative sets of macros: #if VER==1 #define M0() #define M1( arg0 ) #define M2( arg0, arg1 ) #define M3( arg0, arg1, arg2 ) #define M4( arg0, arg1, arg2, arg3 ) #elif VER==2 #define V0( x ) #define V1( x, arg0 ) #define V2( x, arg0, arg1 ) #define V3( x, arg0, arg1, arg2 ) #define V4( x, arg0, arg1, arg2, arg3 ) #endif // I'm trying to write alternative versions of INVOKE for the above sets of macros, // so that the interface below needs no #ifs #if VER==1 #define INVOKE( n_args ) \ BOOST_PP_CAT(M,n_args)( BOOST_PP_ENUM_PARAMS(n_args,arg) ) #elif VER==2 #define INVOKE( n_args ) \ BOOST_PP_CAT(V,n_args)( dummy BOOST_PP_ENUM_TRAILING_PARAMS(n_args,arg) ) #endif // the interface implemented in terms of INVOKE #define A0() INVOKE(0) #define A1( arg0 ) INVOKE(1) #define A2( arg0, arg1 ) INVOKE(2) #define A3( arg0, arg1, arg2 ) INVOKE(3) #define A4( arg0, arg1, arg2, arg3 ) INVOKE(4) int main() { A2(1,2) } My goal here is to keep INVOKE as simple and non-redundant as possible, because alternative versions of INVOKE for alternative sets of given macros will be added later on. Now the call A2(1,2) doesn't compile. If I understand correctly, the reason is ENUM_PARAMS(n_args,arg) is passed to M2, while I need the result of macro expansion of ENUM_PARAMS(...) to be passed to M2. So my question is: Is there a way around this? I attached a file ready to compile with the presented code. Thanks in advance Kris

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