Re: [Boost-users] [Preprocessor] Relative Addresses in BOOST_PP_FILENAME_1

Subject: Re: [Boost-users] [Preprocessor] Relative Addresses in BOOST_PP_FILENAME_1
From: Edward Diener (eldiener_at_[hidden])
Date: 2011-01-23 14:40:01

On 1/23/2011 1:27 PM, Hossein Haeri wrote:
> Dear all,
>
> I am trying to use BOOST_PP_FILENAME_1 for a header file in my current directory. Unless I hardcode the full address, GCC 4.5.1 (MinGW32, WinXP, SP3) says it can't find the same file in which I am using BOOST_PP_FILENAME_1! Is there any way I can go for relative file names? I have already checked the following -- neither works for the same reasons:
>
> #define BOOST_PP_FILENAME_1 "./Header.hpp" //1
>
> #define BOOST_PP_FILENAME_1 ".\Header.hpp" //2
>
> #define BOOST_PP_FILENAME_1 "Header.hpp" //3

It is because BOOST_PP_FILENAME_1 expands in a Boost PP header file. In 
GCC a relative file name is relative only to the file in which it is 
included. Since it is a Boost PP header file that does the including, 
your relative header file will not be found.

In VC++ on Windows relative header files are relative to an entire chain 
of header files being included to that point from the source file on 
down, so a relative header file as you have above would be found.

I ran into this same problem also and ended up just using a non-relative 
name of the form <boost\myLibrary\myHeader.hpp> for all compilers as the 
easiest solution.