Messages in this thread | | | Date | Fri, 4 Jun 2004 21:23:04 +0200 | From | Sam Ravnborg <> | Subject | Re: [PATCH] Symlinks for building external modules |
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On Fri, Jun 04, 2004 at 08:15:02PM +0300, Jari Ruusu wrote: > > How long have you recommended building external modules like this: > > make -C /lib/modules/`uname -r`/build modules SUBDIRS=`pwd` > or > make -C /lib/modules/`uname -r`/build modules M=`pwd` > > Now they all have to be changed to: > > make -C /lib/modules/`uname -r`/source modules SUBDIRS=`pwd` > or > make -C /lib/modules/`uname -r`/source modules M=`pwd`
That would not work either. You need to tell kbuild both where to find the source and the output files. So you have to specify both -C ... and O=... KERNEL=/lib/modules/`uname -r` make -C $KERNEL/source O=$KERNEL/build M=`pwd`
There is no way to do the proposed chang and be backward compatible when the kernel is build using seperate output directories.
Think of the following situation /usr/src/linux-2.6.6-xx/ <= kernel src
/lib/modules/linux-2.6.6-xx-smp/build/ <= output files (or a symlink to them) /lib/modules/linux-2.6.6-xx-smp/source/ <= symlink to kernel src
/lib/modules/linux-2.6.6-xx-up/build/ <= output files (or symlink) /lib/modules/linux-2.6.6-xx-up/source/ <= symlink to kernel src
/lib/modules/linux-2.6.6-xx-4g/build/ <= output files (or symlink) /lib/modules/linux-2.6.6-xx-4g/source/ <= symlink to kernel src
Notice they all share the _same_ kernel src. We just have three different .config files.
If there is a way to be backward compatible with this feature please demonstrate it.
Plese note that the patch Andreas made did not break existing setups if a seperate output directory was not used. The only effect would be an additional symlink to the same dir. (build and source would be links to the same dir).
Andreas - please expalin why you want build to be a symlink, and not the directory used when actually building the kernel.
Sam
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