Re: [Boost-users] Please help: Getting started with Boost

6 Mar 2008

      Thanks Volodya.
1) LD_LIBRARY_PATH solution worked but now when I run a.out, I get a
Segmentation fault.

My hello world code is...

		#include <iostream>
		#include 
		#include 

		struct MyThreadFunc {
		   void operator( )( ) {
		      std::cout << "Hello World !!!" << std::endl;
		   }
		} threadFun;

		int main( ) {

		   boost::thread myThread(threadFun); // Create a thread
that starts
		                                      // running threadFun

		   boost::thread::yield( ); // Give up the main thread's
timeslice
		                           // so the child thread can get
some work
		                           // done.

		   // Go do some other work...

		   myThread.join( ); // The current (i.e., main) thread will
wait
		                    // for myThread to finish before it
returns

		}

Thanks in advance for your help

Nishant

-----Original Message-----
From: boost-users-bounces@lists.boost.org
[mailto:boost-users-bounces@lists.boost.org] On Behalf Of Vladimir Prus
Sent: Thursday, March 06, 2008 2:00 PM
To: boost-users@lists.boost.org
Subject: Re: [Boost-users] Please help: Getting started with Boost

Nishant Mittal wrote:
...
I have a 64 bit red hat linux (also 64 bit) box.
1) I downloaded boost from
boost_1_34_1.tar.bz2
<http://downloads.sourceforge.net/boost/boost_1_34_1.tar.bz2?modtime=1185241
...
108&big_mirror=0>
2) Unizipped and installed it (./configure , make install ) everything
worked fine.
Questions:
[Well, neither question is actually a question about Boost, but anyway]
...
1)       How do I check if I now have the 64 bit version of boost?
file <any-library-file>

should produce output such as:

        <library>: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV),
stripped

You can also use

        readelf -h <any-library-file>
...
2)       I see that all libraries were put into /usr/local/lib and I can
compile my hello world code with the following command.
*         $ g++ hello.cpp -lboost_thread-gcc41-mt-1_34_1
but when I try to run the created a.out file I get a file not found error
msg.
*         $ ./a.out
*         ./a.out: error while loading shared libraries:
libboost_thread-gcc41-mt-1_34_1.so.1.34.1: cannot open shared object file:
No such file or directory
I did an ldd and this is the output.
$ ldd a.out
libboost_thread-gcc41-mt-1_34_1.so.1.34.1 => not found
You should add /usr/local/lib to LD_LIBRARY_PATH environment variable.

- Volodya

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