> > - add option to dpkg-buildpackage not to use gccross > > I'd like to understand how that works first. dpkg-cross's > dpkg-buildpackage wrapper uses gccross if -a arch != $build has been > requested? dpkg-bp calls configure with (possibly implicit) --host > $build --build $build? dpkg-bp calls rules with CC=gccross? And gccross > pretends to be $build's native compiler, but calls the cross-compiler > and rewrites the -I / -L paths accordingly? Please correct me if > anything is wrong.
dpkg-buildpackage from dpkg-cross just sets DEB_HOST_* variables in cross-compilation case, the rest is done by normal dpkg-buildpackage. Gccross is substituted similar to tools like distcc or ccache - by prepending to PATH a directory that has symlinks to gccross named "gcc", "g++", "$target-gcc", "$target-g++" and similar. Those are prepared by dpkg-cross version of dpkg-buildpackage. When started, gccross checks command line, replaces paths from -I and -L args if those don't point to cross-compilation dirs, and calls next argv[0] in path. > My understanding is that gccross is a good short-term solution, and in > the long-term all packages should be cross-build aware and use the right > tools themselves. In fact, my package is configured with > --host=$(DEB_HOST_GNU_TYPE) --build=$(DEB_BUILD_GNU_TYPE), so make > should already call the right compiler with the right paths. It's not that easy. Also issues that come from xxx-config and other scripts that print compiler arguments should be addressed. It is solvable e.g. by creating alternate versions of such scripts at 'dpkg-cross -b' stage and forcing those to PATH at cross-compile time, but that needs to be implemented and checked. > So, with my current understanding, I think even further, there should be > a mechanism (an option, environment variable, whatever) to *enable* > using gccross. It should be disabled by default since compliant packages > don't need it. > > What do you think? See above. I still agree with Raphael (gccross author) that this should be enabled by default - at least until (almost) all debian packages will cross-compile without it. Nikita -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
