id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
5725	Different ordering of includes can lead to compilation errors ( ‘SEEK_SET’ cannot appear in a constant-expression etc )	Relja Arandjelovic <arandjelovic.relja@…>	Ion Gaztañaga	"Hi,

I've got a problem with compiling an extremely simple program on one machine while there is no problem on another one. The program is:

{{{
#include <boost/asio.hpp>
#include <boost/mpi.hpp>
#include <boost/interprocess/sync/interprocess_semaphore.hpp>
int main(){ return 0; }
}}}


I get these errors:

{{{
/usr/local/include/boost/interprocess/detail/os_file_functions.hpp:363:33: error: ‘SEEK_SET’ cannot appear in a constant-expression
/usr/local/include/boost/interprocess/detail/os_file_functions.hpp:364:33: error: ‘SEEK_END’ cannot appear in a constant-expression
/usr/local/include/boost/interprocess/detail/os_file_functions.hpp:365:33: error: ‘SEEK_CUR’ cannot appear in a constant-expression
}}}

Only this order of includes causes the problem, changing the order makes compilation complete successfully and the program (along with a more complicated one) runs fine.

The error happens on my Ubuntu 11.04 (natty), kernel: 2.6.38-8-generic, gcc (Ubuntu/Linaro 4.5.2-8ubuntu4) 4.5.2 .
It doesn't happen on my other machine with the same version of boost and any ordering of the includes, it runs Ubuntu 10.04.2 LTS (lucid), kernel: 2.6.32-30-generic, with gcc (Ubuntu 4.4.3-4ubuntu5) 4.4.3 ."	Bugs	closed	To Be Determined	interprocess	Boost 1.46.1	Problem	wontfix	SEEK_SET, include ordering, compilation error, interprocess, mpi, asio