On Tue, 2007-01-30 at 06:27 +0000, Ciaran McCreesh wrote: > [ Background: tr1 is a set of extensions to the C++ Standard Library > giving various useful things like hash tables and smart pointers. There > are partial implementations included in g++-4.1 and boost and full > implementations available from Dinkumware. It is likely that a lot of > C++ apps will start using it in the not too distant future. ] > > What is the best way to handle packages that require parts of tr1? The > options appear to be: > > * Hard dep upon boost. This sucks for g++-4.1 users. > > * Hard dep upon g++-4.1, which isn't available for all archs. This > doesn't even work because there's no guarantee that >=4.1 is being used > even if it's installed.
isn't it possible to check the version of gcc that is in _use_ in an ebuild, like i can do in a configure script? if so, one could provide a "old-gcc" use flag that must be enabled when trying to build with <gcc-4.1.0 (that actually pulls in boost etc.) and must not be enabled when using >=gcc-4.1.0 ... > > * || ( ) deps, and hope that if the user has 4.1 installed then they're > using it. Since library implementations aren't runtime switchable, this > will lead to breakages if users upgrade gcc and then remove boost. > switching gcc versions may lead to breakage anyway if the user doesn't know what he/she is doing. > None of these are particularly nice... > nope ... let's hope c++-0x comes out soon and that compiler vendors are faster in implementing it than c++-98. -- gentoo-dev@gentoo.org mailing list
