Laurent Guignard wrote: > On Tue, 08 Sep 2009 00:05:55 -0400, Felipe Sateler wrote: >> Sven Joachim wrote: >> >> > On 2009-09-07 12:54 +0200, Sven Joachim wrote: >> > >> >> How about DEB_HOST_ARCH_BITS? This needs dpkg 1.15.4, though. >> > >> > Sorry, that should have been DEB_BUILD_ARCH_BITS. >> >> As Neil would have pointed out if he were still subscribed to -mentors, >> DEB_BUILD_* is almost always the wrong choice, otherwise it will >> cross-build incorrectly. >> >> -- >> Felipe Sateler >> > > Is there any documentation about this ? > Why is it a wrong choice when you want to create a package from sources > for a specific architecture ?
Because you want the package to build for the architecture you plan to run it in. Cross compilation means compiling in one architecture for another. A common case is using an amd64 machine to build arm binaries, because amd64 is so much faster. If you use DEB_BUILD_*, you would are detecting on the amd64 host, instead of the arm you really want, which you would get with DEB_HOST_*. In this case, if you look for DEB_BUILD_*, and the package was being cross- compiled from amd64 to i386, it would get ARB_64=1 instead of ARB_64=0. -- Felipe Sateler -- To UNSUBSCRIBE, email to debian-mentors-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
