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Autolink: Override compiler?
by Stefan Slapeta 04 Dec '04

04 Dec '04

Hi, is there any way to override the compiler autolink uses to create the import library names? This really makes sense when compilers/libraries are binary compatible (e.g. Intel+VC) and could save 100 MBs of disk space! Stefan

2 4

Wait for multiple boost::condition(s)
by Steve Hartmann 04 Dec '04

04 Dec '04

I am about to port some Windows code which does a lot of WaitForMultipleObjects(), waiting for several signals at a time. I was wondering if there was some way to wait for multiple boost::condition(s) at the same time. Thanks, Steve

3 2

Logo: And now for something completely different
by Jonathan Turkanis 04 Dec '04

04 Dec '04

Hi All, I've posted a new logo on the Wiki under the "abstract" category (attached). I'm not sure it's a good candidate itself, but it may give some ideas for new directions. 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2 1

Initial bits of tr1/type_traits @gcc.libstdc++.dev
by Neal D. Becker 03 Dec '04

03 Dec '04

This post might interest some of you: Subject: Initial bits of tr1/type_traits Newsgroups: gmane.comp.gcc.libstdc++.devel

2 2

boost 1.32.0 program_options does not compile with VC7.1 + stlport 4.6.2
by Ralf Juergensen 03 Dec '04

03 Dec '04

Hi, when I compile program_options using VC7.1 and STLport 4.6.2 I get the following errors: <snip> ...found 672 targets... ...updating 14 targets... vc-C++ bin\boost\libs\program_options\build\libboost_program_options.lib\vc-7_1-stlport\release\threading-multi\utf8_codecvt_facet.obj utf8_codecvt_facet.cpp E:\work\CommonLibs\test\boost_1_32_0\boost_1_32_0\boost\program_options\detail\utf8_codecvt_facet.hpp(70) : error C2039: 'codecvt' : is not a member of 'operator``global namespace''' E:\work\CommonLibs\test\boost_1_32_0\boost_1_32_0\boost\program_options\detail\utf8_codecvt_facet.hpp(70) : error C2873: 'codecvt' : symbol cannot be used in a using-declaration </snip> when STLport is used, BOOST_NO_STDC_NAMESPACE is defined on my machine. and then the following code fails (from program_options\detail\utf8_codecvt_facet.hpp around line 70): #elif defined(BOOST_NO_STDC_NAMESPACE) typedef std::mbstate_t mbstate_t; namespace std{ using ::codecvt; } // namespace std #endif But STLport 4.6.2 puts codecvt correctly under std... Would be great if this can be fixed for STLport users :-) Regards Ralf

2 1

Support for MS embedded Visual C++ 4
by Ulrich Eckhardt 03 Dec '04

03 Dec '04

Hi! I'm currently porting our codebase to eVC4 and was wondering if someone already had done so. For the curious, the development environment is mostly similar to VC6, which the same compiler -err- features, though the C++ standardlib is even more limited (I won't even try without STLport, which already works). thanks Ulrich Eckhardt

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casting smart pointer
by Dirk Gregorius 03 Dec '04

03 Dec '04

Hi, how can I upcast a shared_ptr? class Base { /* ... */ } class Derived : public Base { /* ... */ } shared_ptr<Base> Get( const char* pName ); shared_ptr<Derived> spDerived = *_cast<*>( Get( "Derived" ) ); // What do I need to write instead the * ? Depending on the passed name I like to upcast the returned pointer to a pointer to the derived class. I used a static_cast with raw pointers before. What do I have to use with shared_ptr? Do I need to enable RTTI? Regards, -Dirk

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question re has_trivial_contructor type trait
by Robert Ramey 03 Dec '04

03 Dec '04

The documentation for has_trivial_constructor has some cryptic note: Without some (as yet unspecified) help from the compiler, has_trivial_constructor will never report that a class or struct has a trivial constructor; this is always safe, if possibly sub-optimal. What does this mean - it sounds like its of new use - then why is it there? Robert Ramey

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Issue with G++ 3.4.3
by Curtis Spencer 03 Dec '04

03 Dec '04

Hi, I am able to compile a program of mine with gcc 3.3.4 with absolutely no problems, but when I compile it with gcc 3.4.3, I get this issue. Is there something I need to do when installing the boost library to have it use libstdc++.so.6? c++ -I. -I. -I/usr/include/libxml2 -g -O2 -c testActivity.cc c++ -g -O2 -lboost_date_time -lssl -o testActivity Activity.o testActivity.o /usr/lib/gcc/i686-pc-linux-gnu/3.4.3/../../../../i686-pc-linux-gnu/bin/ld: warning: libstdc++.so.5, needed by /usr/lib/libboost_date_time.so, may conflict with libstdc++.so.6 /usr/lib/gcc/i686-pc-linux-gnu/3.4.3/../../../../i686-pc-linux-gnu/bin/ld: `.gnu.linkonce.t._ZN5boost10posix_time16to_simple_stringENS0_5ptimeE' referenced in section `.rodata' of testActivity.o: defined in discarded section `.gnu.linkonce.t._ZN5boost10posix_time16to_simple_stringENS0_5ptimeE' of testActivity.o Thanks, Curtis

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[logo] plus B
by Rene Rivera 03 Dec '04

03 Dec '04

Both in short and long form. -- -- Grafik - Don't Assume Anything -- Redshift Software, Inc. - http://redshift-software.com -- rrivera/acm.org - grafik/redshift-software.com - 102708583/icq

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