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Boost Random Numbers: Normal Distribution
by Hadidi, Lars 11 Jun '15

11 Jun '15

Hello, I tried to find out which method is used by the boost library to transform random numbers from a random number engine to the Gaussian Distribution. There are the Box-Muller-Method, Marsaglia's Polar Method and Ziggurat's algorithm out there, but i could not determine which of those is actually used by boost::normal_distribution<double>? I'd like to know which method is employed here. Thanks for reply in advance, sincerely, Lars

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Re: [Boost-users] "Re: Cannot build boost with MPI using Intel openMPI wrapper"
by Cook, Rich 11 Jun '15

11 Jun '15

I have looked over the docs at http://www.boost.org/doc/libs/1_55_0/doc/html/mpi/getting_started.html#mpi.… and I just don't really understand what the <find-shared-library> option does in this: using mpi : : <find-shared-library>lammpio <find-shared-library>lammpi++ <find-shared-library>mpi <find-shared-library>lam <find-shared-library>dl ; I don't understand how this maps into the instructions here: http://www.boost.org/build/doc/html/bbv2/reference/tools.html > Date: Wed, 10 Jun 2015 18:42:17 +0000 > From: "Cook, Rich" <cook47(a)llnl.gov> > To: "boost-users(a)lists.boost.org" <boost-users(a)lists.boost.org> > Subject: Re: [Boost-users] Boost-users Digest, Vol 4163, Issue 2 > Message-ID: <4F5E3BDC-CDF6-442E-BB02-054510A61C61(a)llnl.gov> > Content-Type: text/plain; charset="utf-8" > >> >> Hi, here is the output of those commands, modified to reflect the actual tool I told boost to use, which is mpiCC, not mpicxx. What should I do with this output, and why does boost not accept it? Thanks! >> >> rcook@rzgpu2 (~ ): /usr/local/tools/openmpi-intel-debug-1.8.4/bin/mpicxx --showme:compile >> -I/usr/local/tools/openmpi-intel-debug-1.8.4/include/openmpi/opal/mca/hwloc/hwloc191/hwloc/include -I/usr/local/tools/openmpi-intel-debug-1.8.4/include/openmpi/opal/mca/event/libevent2021/libevent -I/usr/local/tools/openmpi-intel-debug-1.8.4/include/openmpi/opal/mca/event/libevent2021/libevent/include -I/usr/local/tools/openmpi-intel-debug-1.8.4/include -I/usr/local/tools/openmpi-intel-debug-1.8.4/include/openmpi -pthread >> >> rcook@rzgpu2 (~ ): /usr/local/tools/openmpi-intel-debug-1.8.4/bin/mpicxx --showme:link >> -pthread -Wl,-rpath -Wl,/usr/local/tools/openmpi-intel-debug-1.8.4/lib -Wl,--enable-new-dtags -L/usr/local/tools/openmpi-intel-debug-1.8.4/lib -lmpi >> >> >> >> Subject: Re: [Boost-users] Cannot build boost with MPI using Intel openMPI wrapper >> From: Alain Miniussi (alain.miniussi_at_[hidden]) >> Date: 2015-06-10 10:07:41 >> >> * Next message: Hadidi, Lars: "[Boost-users] Boost Random Numbers: Normal Distribution"<http://lists.boost.org/boost-users/2015/06/84409.php> >> * Previous message: Boris Sch??ling: "Re: [Boost-users] Cannot build boost with MPI using Intel openMPI wrapper"<http://lists.boost.org/boost-users/2015/06/84407.php> >> * In reply to: Boris Sch??ling: "Re: [Boost-users] Cannot build boost with MPI using Intel openMPI wrapper"<http://lists.boost.org/boost-users/2015/06/84407.php> >> >> ________________________________ >> >> What is the result of: >> $/usr/local/tools/openmpi-intel-debug-1.8.4/bin/mpicxx --showme:compile >> $/usr/local/tools/openmpi-intel-debug-1.8.4/bin/mpicxx --showme:link >> ? >> >> >> On 10/06/2015 11:08, Boris Sch?ling wrote: >>> On Wed, 10 Jun 2015 02:37:26 +0200, Cook, Rich <cook47_at_[hidden]> wrote: >>> >>>> Hello, I'm seeing this in my build output. I'm hoping someone can >>>> help me find out what the actual problem is. Thanks for any assistance. >>>> >>>> ===============MPI Auto-configuration=============== >>>> MPI auto-detection failed: unknown wrapper compiler >>>> /usr/local/tools/openmpi-intel-debug-1.8.4/bin/mpiCC >>>> Please report this error to the Boost mailing list: http://www.boost.org<http://www.boost.org/> >>>> You will need to manually configure MPI support. >>>> MPI launcher: mpirun -np >>>> ==================================================== >>>> > > -- > ?Richard Cook > ? Lawrence Livermore National Laboratory > Bldg-453 Rm-4024, Mail Stop L-557 > 7000 East Avenue, Livermore, CA, 94550, USA > ? (office) (925) 423-9605 > ? (fax) (925) 423-6961 > --- > Information Management & Graphics Grp., Services & Development Div., Integrated Computing & Communications Dept. > (opinions expressed herein are mine and not those of LLNL) > > > > > ------------------------------ > > Message: 2 > Date: Wed, 10 Jun 2015 16:56:04 -0700 > From: Nicholas Yue <yue.nicholas(a)gmail.com> > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] Modify an asio echo server so that it does > not send message back to client > Message-ID: <5578CE94.9000304(a)gmail.com> > Content-Type: text/plain; charset=windows-1252; format=flowed > > > > On 2015-06-09 5:14 PM, Gavin Lambert wrote: >> >> You need to pass the bytes_transferred to process as well, so that it >> knows how much data was actually read and therefore how much of data_ >> is actually valid. Don't forget that this may be less than max_length >> and may be different from what the client actually sent (ie. data sent >> in one chunk may be received in multiple chunks). > Thanks Gavin. > > I now have a process() method with the bytes_transferred parameter. > > Newbie question, how do I know the last chunk has been sent, so > that I can now process the data (which will be binary) ? > > Is there some simple example which illustrate this I can refer to ? > > Cheers > Nicholas Yue > > > > ------------------------------ > > Message: 3 > Date: Thu, 11 Jun 2015 12:16:06 +1200 > From: Gavin Lambert <gavinl(a)compacsort.com> > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] Modify an asio echo server so that it does > not send message back to client > Message-ID: <mlak07$9ns$1(a)ger.gmane.org> > Content-Type: text/plain; charset=windows-1252; format=flowed > > On 11/06/2015 11:56, Nicholas Yue wrote: >> I now have a process() method with the bytes_transferred parameter. >> >> Newbie question, how do I know the last chunk has been sent, so >> that I can now process the data (which will be binary) ? >> >> Is there some simple example which illustrate this I can refer to ? > > There isn't any inherent way to know. TCP is a stream protocol -- you > just receive a continuous stream of bytes with no demarcation of any kind. > > You will need to define something at the application layer of the > protocol to decide when a logical unit is complete, typically either by > inserting some delimiter that you know can never occur mid-message or by > sending the length of the following data early on. > > > Note that ASIO does provide some helper methods for these scenarios -- > instead of using async_read_some, which just returns data as it becomes > available, you can use asio::async_read (which you can tell to not > return until it has read a specific number of bytes) or > asio::async_read_until (read until a specific delimiter). (It's tricky, > though not impossible, to do a combination of the two -- but it's > something you should avoid if you have a choice.) > > So for a line-based protocol you could async_read_until a CRLF (or just > LF, depending on the other end), or for a binary protocol that sends a > 4-byte length followed by a payload you could async_read 4 bytes to get > the length, then async_read that many bytes to get the payload. > > > > > ------------------------------ > > Message: 4 > Date: Wed, 10 Jun 2015 23:00:42 -0400 > From: Tim Song <t.canens.cpp(a)gmail.com> > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] Boost Random Numbers: Normal Distribution > Message-ID: > <CAPQZVxs3YoUgkzmqCp=K=4DtjJ3x_ugbbiKm+uKE0q9rvBgSdw(a)mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > On Wed, Jun 10, 2015 at 11:59 AM, Hadidi, Lars < > lhadidi(a)students.uni-mainz.de> wrote: >> >> I'd like to know which method is employed here. >> > Have you tried reading the implementation ( > http://www.boost.org/doc/libs/1_58_0/boost/random/normal_distribution.hpp)? > > Hint: The first comment after the includes is > > // tables for the ziggurat algorithm > -------------- next part -------------- > HTML attachment scrubbed and removed > > ------------------------------ > > Message: 5 > Date: Thu, 11 Jun 2015 08:06:04 +0200 > From: Oswin Krause <Oswin.Krause(a)ruhr-uni-bochum.de> > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] Boost Random Numbers: Normal Distribution > Message-ID: > <ea13f1e81a2759ab472963b5e8e07770(a)mpx2.rz.ruhr-uni-bochum.de> > Content-Type: text/plain; charset=UTF-8; format=flowed > > Recently, it changed to Ziggurat's method. > > On 2015-06-10 17:59, Hadidi, Lars wrote: >> Hello, >> >> I tried to find out which method is used by the boost library to >> transform random numbers from a random number engine to the Gaussian >> Distribution. >> >> There are the Box-Muller-Method, Marsaglia's Polar Method and >> Ziggurat's algorithm out there, but i could not determine which of >> those is actually used by >> >> boost::normal_distribution<double>? >> >> I'd like to know which method is employed here. >> >> Thanks for reply in advance, >> >> sincerely, >> >> Lars >> >> >> _______________________________________________ >> Boost-users mailing list >> Boost-users(a)lists.boost.org >> http://lists.boost.org/mailman/listinfo.cgi/boost-users > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > > ------------------------------ > > End of Boost-users Digest, Vol 4164, Issue 1 > ******************************************** -- ✐Richard Cook ✇ Lawrence Livermore National Laboratory Bldg-453 Rm-4024, Mail Stop L-557 7000 East Avenue, Livermore, CA, 94550, USA ☎ (office) (925) 423-9605 ☎ (fax) (925) 423-6961 --- Information Management & Graphics Grp., Services & Development Div., Integrated Computing & Communications Dept. (opinions expressed herein are mine and not those of LLNL)

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Modify an asio echo server so that it does not send message back to client
by Nicholas Yue 11 Jun '15

11 Jun '15

Hi, I am writing a simple server that is listening to binary data bucket being sent by a client. I am basing the prototype server on the following: http://www.boost.org/doc/libs/1_55_0/doc/html/boost_asio/example/cpp03/echo… I am wonder what is the correct way to modify the example so that it does not echo the result back to the client. The amount of binary data sent are substantial, more importantly, the client has no way to handle the incoming data on the socket. Cheers -- Nicholas Yue Graphics - Arnold, Alembic, RenderMan, OpenGL, HDF5 Custom Dev - C++ porting, OSX, Linux, Windows http://au.linkedin.com/in/nicholasyue https://vimeo.com/channels/naiadtools

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Re: [Boost-users] Boost-users Digest, Vol 4163, Issue 2
by Cook, Rich 10 Jun '15

10 Jun '15

I made a mistake. I used mpicxx in the below commands. If I use mpiCC, it gives the exact same output. > Date: Wed, 10 Jun 2015 18:38:26 +0000 > From: "Cook, Rich" <cook47(a)llnl.gov> > To: "boost-users(a)lists.boost.org" <boost-users(a)lists.boost.org> > Subject: Re: [Boost-users] "Re: Cannot build boost with MPI using > Intel openMPI wrapper" > Message-ID: <856FE4B0-86E0-4E87-90AE-65A0C4653D36(a)llnl.gov> > Content-Type: text/plain; charset="utf-8" > > Hi, here is the output of those commands, modified to reflect the actual tool I told boost to use, which is mpiCC, not mpicxx. What should I do with this output, and why does boost not accept it? Thanks! > > rcook@rzgpu2 (~ ): /usr/local/tools/openmpi-intel-debug-1.8.4/bin/mpicxx --showme:compile > -I/usr/local/tools/openmpi-intel-debug-1.8.4/include/openmpi/opal/mca/hwloc/hwloc191/hwloc/include -I/usr/local/tools/openmpi-intel-debug-1.8.4/include/openmpi/opal/mca/event/libevent2021/libevent -I/usr/local/tools/openmpi-intel-debug-1.8.4/include/openmpi/opal/mca/event/libevent2021/libevent/include -I/usr/local/tools/openmpi-intel-debug-1.8.4/include -I/usr/local/tools/openmpi-intel-debug-1.8.4/include/openmpi -pthread > > rcook@rzgpu2 (~ ): /usr/local/tools/openmpi-intel-debug-1.8.4/bin/mpicxx --showme:link > -pthread -Wl,-rpath -Wl,/usr/local/tools/openmpi-intel-debug-1.8.4/lib -Wl,--enable-new-dtags -L/usr/local/tools/openmpi-intel-debug-1.8.4/lib -lmpi > > > > Subject: Re: [Boost-users] Cannot build boost with MPI using Intel openMPI wrapper > From: Alain Miniussi (alain.miniussi_at_[hidden]) > Date: 2015-06-10 10:07:41 > > * Next message: Hadidi, Lars: "[Boost-users] Boost Random Numbers: Normal Distribution"<http://lists.boost.org/boost-users/2015/06/84409.php> > * Previous message: Boris Sch??ling: "Re: [Boost-users] Cannot build boost with MPI using Intel openMPI wrapper"<http://lists.boost.org/boost-users/2015/06/84407.php> > * In reply to: Boris Sch??ling: "Re: [Boost-users] Cannot build boost with MPI using Intel openMPI wrapper"<http://lists.boost.org/boost-users/2015/06/84407.php> > > ________________________________ > > What is the result of: > $/usr/local/tools/openmpi-intel-debug-1.8.4/bin/mpicxx --showme:compile > $/usr/local/tools/openmpi-intel-debug-1.8.4/bin/mpicxx --showme:link > ? > > > On 10/06/2015 11:08, Boris Sch?ling wrote: >> On Wed, 10 Jun 2015 02:37:26 +0200, Cook, Rich <cook47_at_[hidden]> wrote: >> >>> Hello, I'm seeing this in my build output. I'm hoping someone can >>> help me find out what the actual problem is. Thanks for any assistance. >>> >>> ===============MPI Auto-configuration=============== >>> MPI auto-detection failed: unknown wrapper compiler >>> /usr/local/tools/openmpi-intel-debug-1.8.4/bin/mpiCC >>> Please report this error to the Boost mailing list: http://www.boost.org<http://www.boost.org/> >>> You will need to manually configure MPI support. >>> MPI launcher: mpirun -np >>> ==================================================== >>> -- ✐Richard Cook ✇ Lawrence Livermore National Laboratory Bldg-453 Rm-4024, Mail Stop L-557 7000 East Avenue, Livermore, CA, 94550, USA ☎ (office) (925) 423-9605 ☎ (fax) (925) 423-6961 --- Information Management & Graphics Grp., Services & Development Div., Integrated Computing & Communications Dept. (opinions expressed herein are mine and not those of LLNL)

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Re: [Boost-users] "Re: Cannot build boost with MPI using Intel openMPI wrapper"
by Cook, Rich 10 Jun '15

10 Jun '15

Hi, here is the output of those commands, modified to reflect the actual tool I told boost to use, which is mpiCC, not mpicxx. What should I do with this output, and why does boost not accept it? Thanks! rcook@rzgpu2 (~ ): /usr/local/tools/openmpi-intel-debug-1.8.4/bin/mpicxx --showme:compile -I/usr/local/tools/openmpi-intel-debug-1.8.4/include/openmpi/opal/mca/hwloc/hwloc191/hwloc/include -I/usr/local/tools/openmpi-intel-debug-1.8.4/include/openmpi/opal/mca/event/libevent2021/libevent -I/usr/local/tools/openmpi-intel-debug-1.8.4/include/openmpi/opal/mca/event/libevent2021/libevent/include -I/usr/local/tools/openmpi-intel-debug-1.8.4/include -I/usr/local/tools/openmpi-intel-debug-1.8.4/include/openmpi -pthread rcook@rzgpu2 (~ ): /usr/local/tools/openmpi-intel-debug-1.8.4/bin/mpicxx --showme:link -pthread -Wl,-rpath -Wl,/usr/local/tools/openmpi-intel-debug-1.8.4/lib -Wl,--enable-new-dtags -L/usr/local/tools/openmpi-intel-debug-1.8.4/lib -lmpi Subject: Re: [Boost-users] Cannot build boost with MPI using Intel openMPI wrapper From: Alain Miniussi (alain.miniussi_at_[hidden]) Date: 2015-06-10 10:07:41 * Next message: Hadidi, Lars: "[Boost-users] Boost Random Numbers: Normal Distribution"<http://lists.boost.org/boost-users/2015/06/84409.php> * Previous message: Boris SchÃ¤ling: "Re: [Boost-users] Cannot build boost with MPI using Intel openMPI wrapper"<http://lists.boost.org/boost-users/2015/06/84407.php> * In reply to: Boris SchÃ¤ling: "Re: [Boost-users] Cannot build boost with MPI using Intel openMPI wrapper"<http://lists.boost.org/boost-users/2015/06/84407.php> ________________________________ What is the result of: $/usr/local/tools/openmpi-intel-debug-1.8.4/bin/mpicxx --showme:compile $/usr/local/tools/openmpi-intel-debug-1.8.4/bin/mpicxx --showme:link ? On 10/06/2015 11:08, Boris Schäling wrote: > On Wed, 10 Jun 2015 02:37:26 +0200, Cook, Rich <cook47_at_[hidden]> wrote: > >> Hello, I'm seeing this in my build output. I'm hoping someone can >> help me find out what the actual problem is. Thanks for any assistance. >> >> ===============MPI Auto-configuration=============== >> MPI auto-detection failed: unknown wrapper compiler >> /usr/local/tools/openmpi-intel-debug-1.8.4/bin/mpiCC >> Please report this error to the Boost mailing list: http://www.boost.org<http://www.boost.org/> >> You will need to manually configure MPI support. >> MPI launcher: mpirun -np >> ==================================================== >> >> >> Here are the commands that generated it: >> >> + mkdir -p //usr/local/tools/boost-intel-1.57.0 >> + mkdir -p //usr/local/bin >> + pushd boost_1_57_0 >> /tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0 >> /tmp/dpkg-mkdeb.1Tdcc4kqMi/src >> + ./bootstrap.sh --prefix=/usr/local/tools/boost-intel-1.57.0 >> + echo 'using mpi : >> /usr/local/tools/openmpi-intel-debug-1.8.4/bin/mpiCC ;' >> >> tools/build/src/user-config.jam >> >> + ./b2 -j20 --debug-configuration install > > It's a while ago that I was using Boost.MPI. But if auto-detection > fails, you could pass MPI-related options explicitly. There is this > remark in the MPI Jamfile: > > # If your MPI implementation does not have a wrapper compiler, or the MPI > # auto-detection code does not work with your MPI's wrapper compiler, > # you can pass MPI-related options explicitly via the second parameter > to the > # mpi module: > # > # using mpi : : <find-shared-library>lammpio > <find-shared-library>lammpi++ > # <find-shared-library>mpi <find-shared-library>lam > # <find-shared-library>dl ; > > HTH, > Boris > >> [...] > > _______________________________________________ > Boost-users mailing list > Boost-users_at_[hidden] > http://lists.boost.org/mailman/listinfo.cgi/boost-users -- --- Alain -- ✐Richard Cook ✇ Lawrence Livermore National Laboratory Bldg-453 Rm-4024, Mail Stop L-557 7000 East Avenue, Livermore, CA, 94550, USA ☎ (office) (925) 423-9605 ☎ (fax) (925) 423-6961 --- Information Management & Graphics Grp., Services & Development Div., Integrated Computing & Communications Dept. (opinions expressed herein are mine and not those of LLNL)

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Cannot build boost with MPI using Intel openMPI wrapper
by Cook, Rich 10 Jun '15

10 Jun '15

Hello, I'm seeing this in my build output. I'm hoping someone can help me find out what the actual problem is. Thanks for any assistance. ===============MPI Auto-configuration=============== MPI auto-detection failed: unknown wrapper compiler /usr/local/tools/openmpi-intel-debug-1.8.4/bin/mpiCC Please report this error to the Boost mailing list: http://www.boost.org You will need to manually configure MPI support. MPI launcher: mpirun -np ==================================================== Here are the commands that generated it: + mkdir -p //usr/local/tools/boost-intel-1.57.0 + mkdir -p //usr/local/bin + pushd boost_1_57_0 /tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0 /tmp/dpkg-mkdeb.1Tdcc4kqMi/src + ./bootstrap.sh --prefix=/usr/local/tools/boost-intel-1.57.0 + echo 'using mpi : /usr/local/tools/openmpi-intel-debug-1.8.4/bin/mpiCC ;' >> tools/build/src/user-config.jam + ./b2 -j20 --debug-configuration install # ====================================================================== And here is the full output of that last b2 command: notice: found boost-build.jam at /tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/boost-build.jam notice: loading Boost.Build from /tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src notice: Searching '/etc' '/g/g0/rcook' '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src' '/usr/share/boost-build' '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src/kernel' '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src/util' '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src/build' '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src/tools' '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src/contrib' '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src/.' for site-config configuration file 'site-config.jam'. notice: Configuration file 'site-config.jam' not found in '/etc' '/g/g0/rcook' '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src' '/usr/share/boost-build' '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src/kernel' '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src/util' '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src/build' '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src/tools' '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src/contrib' '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src/.'. notice: Searching '/g/g0/rcook' '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src' '/usr/share/boost-build' '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src/kernel' '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src/util' '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src/build' '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src/tools' '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src/contrib' '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src/.' for user-config configuration file 'user-config.jam'. notice: Loading user-config configuration file 'user-config.jam' from '/tmp/dpkg-mkdeb.1Tdcc4kqMi/src/boost_1_57_0/tools/build/src'. ===============MPI Auto-configuration=============== MPI auto-detection failed: unknown wrapper compiler /usr/local/tools/openmpi-intel-debug-1.8.4/bin/mpiCC Please report this error to the Boost mailing list: http://www.boost.org You will need to manually configure MPI support. MPI launcher: mpirun -np ==================================================== -- ✐Richard Cook ✇ Lawrence Livermore National Laboratory Bldg-453 Rm-4024, Mail Stop L-557 7000 East Avenue, Livermore, CA, 94550, USA ☎ (office) (925) 423-9605 ☎ (fax) (925) 423-6961 --- Information Management & Graphics Grp., Services & Development Div., Integrated Computing & Communications Dept. (opinions expressed herein are mine and not those of LLNL)

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eval_if fails - problem for C++ guru
by Robert Ramey 07 Jun '15

07 Jun '15

I've been having a very difficult time with a problem illustrated by the following program: It looks like the eval_if in line 51 isn't working correctly. That is, the metafuction get_promotion_policy is being invoked when both types are not safe types. I've been working on this for two days and can't see what's going on. Any help from a TMP genious would be much appreciated. #include <type_traits> #include <boost/mpl/and.hpp> #include <boost/mpl/or.hpp> #include <boost/mpl/if.hpp> #include <boost/mpl/eval_if.hpp> #include <boost/mpl/identity.hpp> struct safe_tag {}; template<class T, class P = void> struct safe : public safe_tag { T m_t; typedef P PromotionPolicy; }; template<class T> struct is_safe : public //std::is_arithmetic<T> std::is_base_of<safe_tag, T> {}; template<class T, class U> struct common_policies { static_assert( boost::mpl::or_< is_safe<T>, is_safe<U> >::value, "at least one type must be a safe type" ); template<typename Z> struct get_promotion_policy { static_assert( is_safe<Z>::value, "only safe types have promotion policies" ); typedef typename Z::PromotionPolicy type; }; // if both types are safe, the policies have to be the same! static_assert( boost::mpl::eval_if< boost::mpl::and_< is_safe<T>, is_safe<U> >, typename std::is_same< typename get_promotion_policy<T>::type, typename get_promotion_policy<U>::type >::type, boost::mpl::identity<boost::mpl::true_> >::type::value, "if both types are safe, the policies have to be the same!" ); // now we've verified that there is no conflict between policies // return the one from the first safe type typedef typename boost::mpl::if_< is_safe<T>, T, typename boost::mpl::if_< is_safe<U>, U, // boost::mpl::void_ >::type >::type safe_type; typedef typename get_promotion_policy<safe_type>::type promotion_policy; }; common_policies<int, safe<int> > t; int main(){ return 0; }

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boost::tuple in std::map
by Uthpal Urubail 06 Jun '15

06 Jun '15

Experts, I am using boost::tuple as key in std::map. I would like to write my own comparison method (considering tolerance in comparison) The default comparison defined in tuple_comparison.hpp is of no use to me. Any help in this is highly appreciated. Regards, UJ

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[Log] Failed to compile applications with Boost.Log
by lin li 05 Jun '15

05 Jun '15

Hi, guys. I am trying to to compile the tutorial code from Boost.Log with the trivial logger. But it fails with the error: "‘boost::log::v2s_mt_posix::trivial::boost’ has not been declared" OS: OracleLinux 6.6 G++: 4.4.7 Boost: 1.57 I have googled a lot about it, but it seems that all answers are related to some linking error, but this one is different. It seems that it does not even find the declaration in the first place. Anyone has similar experience?

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Re: [Boost-users] Serialization] Non-default constructor and static data members
by Mccall, Kurt E. (JSC-EG411) 04 Jun '15

04 Jun '15

Robert, thanks for the reply -- I won't attempt to serialize the static const members. Also, it looks like if the members is static but not const and defined outside of the class, the linker finds it just fine, when it is referenced in save_construct_data(). Kurt > >I'm not so sure about that. There no need to serialize the static const >values since they are fixed and initialized before the first instance is >constructed. > >It has always been that static variables had to be explicitly >initialized outside the class. As in > >const int A::var1 = 1; // no longer necessary >const int A::var2 = 2; > >But I guess C++11 changed that. > >Robert Ramey >_______________________________________________ >Boost-users mailing list >Boost-users(a)lists.boost.org >http://lists.boost.org/mailman/listinfo.cgi/boost-users

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