Re:[boost] Re: Re:Re: Re:Re: additional boost libraries?
Edward Diener wrote:
If you don't want to take the 15 minutes to do this, you can build with an older compiler and without spirit at all, you could easily modify the jamfile. Spirit is only used in the building of the library.
How can the jamfile be modified so that those who have an older compiler, and don't need Spirit 1.6 for XML serialization, can build the serialization library without Spirit 1.6 ? That was my point essentially.
In order to compile with older compilers the variable SPIRIT_ROOT has to be defined and point to the root where spirit is installed. So the build jamfile would have to be modified so that that the modules for XML are build if and only if: a) If the compiler is an older compiler b) && SPIRIT_ROOT is defined to something not null c) || the compiler is a newer compiler. I think the build jamfile could altered to do this. I spent a little time at it but didn't immediately see how to do it. But I think it should be possible. Its probably trivial for a BJAM guru - so feel free anyone. Also it would be nice if it echoed a comment indicating that its skipping the XML components for lack of SPIRIT_ROOT.
BTW, your library is great and you should never feel that because you don't hear from others about it that this indicates a lack of interest in users. What it often indicates is that the library is working so flawlessly for 99.99% of its needs that users are content and do not need to send you any reports about problems or errors.
From my vantage point it has become so large and intricate after accommodating all the "requirements" including features and portability that it's really hard for me to believe that it actually works all that well. Oh well.
Robert Ramey
Robert Ramey wrote:
Edward Diener wrote:
How can the jamfile be modified so that those who have an older compiler, and don't need Spirit 1.6 for XML serialization, can build the serialization library without Spirit 1.6 ? That was my point essentially.
In order to compile with older compilers the variable SPIRIT_ROOT has to be defined and point to the root where spirit is installed.
So the build jamfile would have to be modified so that that the modules for XML are build if and only if:
a) If the compiler is an older compiler b) && SPIRIT_ROOT is defined to something not null c) || the compiler is a newer compiler.
I think the build jamfile could altered to do this. I spent a little time at it but didn't immediately see how to do it. But I think it should be possible. Its probably trivial for a BJAM guru - so feel free anyone. Also it would be nice if it echoed a comment indicating that its skipping the XML components for lack of SPIRIT_ROOT.
Although it's now possible to do this, I would *not* recommend this as a solution. The basic problem with changing the Jamfile to skip the building is that it will only work if people use the Jamfile. That's fine for testing, but not for release. Many people out there don't use BB for building Boost. The better approach is to #ifdef the code itself to either #error or #warn based on a compiler check and a check for SPIRIT_ROOT. Also possible in the case of libraries using Spirit is to wrap code that requires it so that it compiles to nothing if Spirit is not available. Using Spirit specific prefix and postfix header for this would be convenient. For example Spirit could provide pre/postfix headers that do the check, and Spirit dependent code would do this: #include <boost/spirit/prefix.hpp> // optional code that requires spirit, not compiled if not available #include <boost/spirit/postfix.hpp> -- -- Grafik - Don't Assume Anything -- Redshift Software, Inc. - http://redshift-software.com -- rrivera/acm.org - grafik/redshift-software.com - 102708583/icq
participants (2)
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Rene Rivera -
Robert Ramey