Xapian devel - Feb 2014 - A beginner in "Posting list encoding improvements"

On 12 Feb 2014, at 08:55, Olly Betts <olly at survex.com> wrote:
> For GSoC projects, I'd recommend developing on Linux, or another
> Unix-like platform.  I think everyone who has so far expressed an
> interest in mentoring uses Linux or Mac OS X, so we're much better
> placed to help with development on such platforms.

If you're on Windows, the way of doing this is to virtualise (either
VirtualBox, which is free, or VMWare, which isn't but you can sometimes find
prepackaged VMs which work with their free version). I'd recommend using a
recent Ubuntu (13.04 or 13.10) for preference, although 12.04 (which is the Long
Term Support version) shouldn't present too many pain points.

If you need help, I can probably be of assistance. Keeping track of which
commands you type (eg by using script(1)) is a good idea if you're
unfamiliar with linux and think you might run into problems.

J

-- 
 James Aylett, occasional trouble-maker
 xapian.org

On Wed, Feb 12, 2014 at 10:32:03PM +0800, Hurricane Tong
wrote:
> I seem to run into some trouble.
> I succeeded in building the source code of Xapian in ubuntu,
> but when I write a demo c++ application 
> 
> [snip] 
> I can't get it built.
> 
> 
> hurricanetong at hurricanetong-VirtualBox:~/workspace$ g++ -L/usr/local/lib
-lxapian-1.3 BuildIndexDemo.cpp
Hmmm, where did you get this invocation from? This should be:

 g++ `xapian-config --cxxflags --libs` BuildIndexDemo.cpp

xapian-config knbow how to link xapian applications (and libxapian-1.3 looks
strange).
> 
> In /usr/local/lib, there are libxapian-1.3.so, libxapian-1.3.a,
libxapian-1.3.so.3, libxapian-1.3.so.3.0.0
> 
> 
> I also set LD_LIBRARY_PATH=/usr/local/lib
> 
LD_LIBRARY_PATH and ld.so.conf.d are used by the runtime dynamic linker, _not_
by the
compile time linker.
> in /etc/ld.so.conf.d, there are also /usr/local/lib
> 
> 
> I also restart my machine, but I still can't make it. 
Linux isn't Windows - the only time you need to reboot is after you
installed
a new kernel.

 HTH Ralf Mattes
 
> 
> ------------------
> HurricaneTong,Second Year Undergraduate,
> School of Computer Science,
> Fudan University, China.
> 
> 
>  
> 
> 
> 
> 
> ------------------ Original ------------------
> From:  "James Aylett";<james-xapian at tartarus.org>;
> Date:  Wed, Feb 12, 2014 08:18 PM
> To:  "Xapian Development"<xapian-devel at
lists.xapian.org>;
> Cc:  "Hurricane Tong"<zhangshangtong.cpp at qq.com>; 
> Subject:  Re: [Xapian-devel] A beginner in "Posting list encoding
improvements"
> 
> 
> 
> On 12 Feb 2014, at 08:55, Olly Betts <olly at survex.com> wrote:
> 
> > For GSoC projects, I'd recommend developing on Linux, or another
> > Unix-like platform.  I think everyone who has so far expressed an
> > interest in mentoring uses Linux or Mac OS X, so we're much better
> > placed to help with development on such platforms.
> 
> 
> If you're on Windows, the way of doing this is to virtualise (either
VirtualBox, which is free, or VMWare, which isn't but you can sometimes find
prepackaged VMs which work with their free version). I'd recommend using a
recent Ubuntu (13.04 or 13.10) for preference, although 12.04 (which is the Long
Term Support version) shouldn't present too many pain points.
> 
> If you need help, I can probably be of assistance. Keeping track of which
commands you type (eg by using script(1)) is a good idea if you're
unfamiliar with linux and think you might run into problems.
> 
> J
> 
> -- 
>  James Aylett, occasional trouble-maker
>  xapian.org
> 
> .
> _______________________________________________
> Xapian-devel mailing list
> Xapian-devel at lists.xapian.org
> http://lists.xapian.org/mailman/listinfo/xapian-devel

I seem to run into some trouble.
I succeeded in building the source code of Xapian in ubuntu,
but when I write a demo c++ application 


#include <xapian.h>     
#include <iostream>


using namespace std;


int
main()
{
    Xapian::WritableDatabase db("database",
Xapian::DB_CREATE_OR_OPEN);
    return 0;
}



I can't get it built.


hurricanetong at hurricanetong-VirtualBox:~/workspace$ g++ -L/usr/local/lib
-lxapian-1.3 BuildIndexDemo.cpp
/tmp/cc7JwYty.o: In function `main':
BuildIndexDemo.cpp:(.text+0x52): undefined reference to
`Xapian::WritableDatabase::WritableDatabase(std::basic_string<char,
std::char_traits<char>, std::allocator<char> > const&, int,
int)'
BuildIndexDemo.cpp:(.text+0x7b): undefined reference to
`Xapian::WritableDatabase::~WritableDatabase()'
BuildIndexDemo.cpp:(.text+0xa0): undefined reference to
`Xapian::WritableDatabase::~WritableDatabase()'



In /usr/local/lib, there are libxapian-1.3.so, libxapian-1.3.a,
libxapian-1.3.so.3, libxapian-1.3.so.3.0.0


I also set LD_LIBRARY_PATH=/usr/local/lib


in /etc/ld.so.conf.d, there are also /usr/local/lib


I also restart my machine, but I still can't make it. 


------------------
HurricaneTong,Second Year Undergraduate,
School of Computer Science,
Fudan University, China.


 




------------------ Original ------------------
From:  "James Aylett";<james-xapian at tartarus.org>;
Date:  Wed, Feb 12, 2014 08:18 PM
To:  "Xapian Development"<xapian-devel at lists.xapian.org>; 
Cc:  "Hurricane Tong"<zhangshangtong.cpp at qq.com>; 
Subject:  Re: [Xapian-devel] A beginner in "Posting list encoding
improvements"



On 12 Feb 2014, at 08:55, Olly Betts <olly at survex.com> wrote:
> For GSoC projects, I'd recommend developing on Linux, or another
> Unix-like platform.  I think everyone who has so far expressed an
> interest in mentoring uses Linux or Mac OS X, so we're much better
> placed to help with development on such platforms.

If you're on Windows, the way of doing this is to virtualise (either
VirtualBox, which is free, or VMWare, which isn't but you can sometimes find
prepackaged VMs which work with their free version). I'd recommend using a
recent Ubuntu (13.04 or 13.10) for preference, although 12.04 (which is the Long
Term Support version) shouldn't present too many pain points.

If you need help, I can probably be of assistance. Keeping track of which
commands you type (eg by using script(1)) is a good idea if you're
unfamiliar with linux and think you might run into problems.

J

-- 
 James Aylett, occasional trouble-maker
 xapian.org

.
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