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Install: recommended directory for boost-root?
by Michael Fuller 19 Dec '07

19 Dec '07

I'm installing Boost on a Mac (OS 10.5.1). I realize that I could put the libraries just about anywhere, but is there a recommended directory for the Boost root? Some possibilities I've considered include /opt/local/lib/Boost, opt/local/var/Boost, /Library/Boost, / local/bin/Boost, /local/share/Boost ... Where do you normally install your "third-party" libraries and why? Does the recommended location depend on platform (i.e. Linux, Win, Mac)? Thanks! Mike ========================== Michael Fuller, Ph.D. Faculty of Forestry University of Toronto Toronto, ON M5R 3B3 PHONE: (416) 946-0119 EMAIL: mm.fuller(a)utoronto.ca WEB: www.tiem.utk.edu/~mmfuller

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[program_options] Custom storage
by Adam Badura 19 Dec '07

19 Dec '07

Is there a way to add a different storage for program options (different from available: command line, configuration file, environmental variables)? I would like to use this library (or at least try to) however I must store configuration in Windows Registry. Is it possible now? Will it ever be (as it seems to me that it is not possible now)? Adam Badura

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Segmentation fault with wdirectory_iterator
by Adam Panayis 19 Dec '07

19 Dec '07

Hi, I have a similar problem to the one below. http://lists.boost.org/boost-users/2007/12/32679.php When I try to create a wdirectory_iterator on a wpath I get a segmentation fault. Sample code: #include <iostream> #include <boost/filesystem/config.hpp> #include <boost/filesystem/operations.hpp> #include <boost/filesystem/fstream.hpp> #include <boost/program_options.hpp> #include <boost/scoped_array.hpp> main() { boost::filesystem::wpath wp_t2(L"/"); std::locale::global(std::locale("")); boost::filesystem::wdirectory_iterator wd_1(wp_t2); } I am using boost version 1.34.1 on fedora 7. Can anyone help? Thanks Adam

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Boost.Timer in OSX 10.5
by Tom Smith 19 Dec '07

19 Dec '07

Hi, Since upgrading this computer to OSX 10.5 (from Tiger 10.4), I've had weird boost::timer behaviour - jobs taking 50+ hours report as finishing in ~3000s. It seems similar to the problem here (elapsed_max is the problem, basically): http://lists.boost.org/boost-users/2007/09/30661.php The code in that thread gives elapsed_max() as 4294.97 sec on my system. I guess this is a bug the standard library on 10.5, not a Boost bug, but still - any ideas? Thanks, Tom

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[fusion] bug in end_impl for struct_tag
by Roman Perepelitsa 19 Dec '07

19 Dec '07

I've encountered fusion's behavior that seems to be a bug. #include <boost/mpl/assert.hpp> #include <boost/type_traits/is_same.hpp> #include <boost/fusion/sequence/intrinsic/begin.hpp> #include <boost/fusion/sequence/intrinsic/end.hpp> #include <boost/fusion/adapted/struct/adapt_struct.hpp> #include <boost/fusion/iterator/next.hpp> struct s { int m; }; BOOST_FUSION_ADAPT_STRUCT(s, (int, m)) int main() { using namespace boost::fusion; using boost::is_same; typedef result_of::begin<s>::type b; typedef result_of::end<s>::type e; // this fails BOOST_MPL_ASSERT((is_same<result_of::next<b>::type, e>)); } Here is a patch against trunk: Index: end_impl.hpp =================================================================== --- end_impl.hpp (revision 42137) +++ end_impl.hpp (working copy) @@ -8,6 +8,7 @@ #if !defined(BOOST_FUSION_END_IMPL_24122005_1755) #define BOOST_FUSION_END_IMPL_24122005_1755 +#include <boost/fusion/adapted/struct/extension.hpp> #include <boost/fusion/adapted/struct/struct_iterator.hpp> namespace boost { namespace fusion @@ -25,7 +26,7 @@ template <typename Sequence> struct apply { - typedef struct_iterator<Sequence, 2> type; + typedef struct_iterator<Sequence, struct_size<Sequence>::value> type; static type call(Sequence& v) Regards, Roman Perepelitsa.

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How to debug? - Unable to load Boost.Build: could not find build system.
by Chun Tse 19 Dec '07

19 Dec '07

Hello, I've followed the instructions from here: http://www.boost.org/boost-build2/doc/html/bbv2/installation.html I can build from example hello.cpp from: /usr/share/boost-build/example/hello $ bjam ...found 9 targets... ...updating 5 targets... MkDir1 bin MkDir1 bin\gcc-mingw-3.4.5 MkDir1 bin\gcc-mingw-3.4.5\debug gcc.compile.c++ bin\gcc-mingw-3.4.5\debug\hello.o gcc.link bin\gcc-mingw-3.4.5\debug\hello.exe ...updated 5 targets... /usr/share/boost-build/example/hello $ ls Jamroot bin hello.cpp /usr/share/boost-build/example/hello $ find . . ./bin ./bin/gcc-mingw-3.4.5 ./bin/gcc-mingw-3.4.5/debug ./bin/gcc-mingw-3.4.5/debug/hello.exe ./bin/gcc-mingw-3.4.5/debug/hello.o ./hello.cpp ./Jamroot I copy the example directory to my h drive and edit the ../boost-build.jam so it points to the build system: /h/workspace/example/hello $ cat ../boost-build.jam # Copyright 2002, 2003 Vladimir Prus # Distributed under the Boost Software License, Version 1.0. # (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) boost-build /usr/share/boost-build/kernel ; Then I run bjam and get an error saying it can't find bootstrap.jam. /h/workspace/example/hello $ ls Jamroot hello.cpp /h/workspace/example/hello $ bjam Unable to load Boost.Build: could not find build system. --------------------------------------------------------- h:\workspace\example\boost-build.jam attempted to load the build system by invoking 'boost-build /usr/share/boost-build/kernel ;' but we were unable to find "bootstrap.jam" in the specified directory or in BOOST_BUILD_PATH (searching /usr/share/boost-build/kernel, /usr/share/boost-build). Please consult the documentation at 'http://www.boost.org'. bootstrap.jam is contained in /usr/share/boost-build/kernel $ ls -l /usr/share/boost-build/kernel total 18 -rw-r--r-- 1 mtse Administ 194 Dec 19 17:01 boost-build.jam -rw-r--r-- 1 mtse Administ 4287 Dec 19 16:08 bootstrap.jam -rw-r--r-- 1 mtse Administ 10260 Dec 19 16:08 class.jam -rw-r--r-- 1 mtse Administ 7145 Dec 19 16:08 errors.jam -rw-r--r-- 1 mtse Administ 11414 Dec 19 16:08 modules.jam $ env | grep BOOS BOOST_BUILD_PATH=/usr/share/boost-build What could be wrong? How can I debug this? $ bjam -v Boost.Jam Version 3.1.16. OS=NT. Copyright 1993-2002 Christopher Seiwald and Perforce Software, Inc. Copyright 2001 David Turner. Copyright 2001-2004 David Abrahams. Copyright 2002-2005 Rene Rivera. Copyright 2003-2005 Vladimir Prus. Michael

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[boost-users] hamming distance.
by chun ping wang 18 Dec '07

18 Dec '07

Hi, are their any library in boost where it can help me count the difference of two list. (i.e. the number of items that difference from each other) also known as hamming distance.

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boost with embedded compiler / in embedded area
by Bernhard Merkle 18 Dec '07

18 Dec '07

Hi, I have the following questions about using boost with embedded compilers / in the embedded area 1. what about embedded c++ compiler support in boost ? I saw on [1] some compilers but my list e.g. is - Metrowerks Codewarrior for PPC (v 8.x unfortunately) but the 9.x seems also to have problems - GreenHills C++ (seems to have the EDG parser, so no problem) - ARM C++ an they are not officially supported. Has anyone tried them or others ? experiences ? AFAIK, boost has some requirements to C++ compilers (especially templates) 2. what parts of boost are you using in your (embedded) area ? What parts would you avoid and what is recommendable ? (e.g. statechart, thread, the whole collection/algorithm things) Any performance/size issues ? TIA and kind regads, Berni [1] http://engineering.meta-comm.com/boost-regression/CVS-HEAD/developer/summar… <http://engineering.meta-comm.com/boost-regression/CVS-HEAD/developer/summar…>

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[Statechart] Compilation error with BCB 2007.
by Alfred Handke 18 Dec '07

18 Dec '07

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file descriptor imitation - boost iostreams
by Michał Nowotka 18 Dec '07

18 Dec '07

Hi Boosters, I have a function with following interface: int gvRender (GVC_t *gvc, graph_t *g, char *format, FILE *out) but I don't want to store the output in temporary file but to compute everything in memory... (but to store the output to same malloced string and pass it to a display function). Boost is so powerful - so can I solve this problem somehow using boost (C++ doesn't doesn't provide tools to simulate file descriptors )? I know very little about boost iostream would it be helpful? -- Cheers, Michał Nowotka

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