On Sun, Jan 19, 2003 at 01:55:11PM +0100, Olaf Titz wrote:
> It is a bug that Documentation/modules.txt is so outdated that it
> contains little useful information any more.
An updated version that at least describe how to build modules sanely
outside the kernel tree is queued for inclusion.
> It is a bug that
> Documentation/kbuild/makefiles.txt is at least a bit outdated.
A totally revised makefiles.txt is queued for inclusion.
> It is a bug that the build process outside of the kernel tree changes
> files inside the kernel tree when MODVERSIONS is enabled. (At least
> this was the case last time I checked.) This means the kernel tree
> can't be mounted read-only, or at least you would have to do dirty
> tricks with symlinks.
I have posted 2-3 version of a "separate src-tree" patch.
But due to the existence of such weird things as oprofile and xfs it did
not work in all cases. I symlinked all makefiles, but wanted to avoid
catching the rest of the directories.
I want my queued stuff applied before revisiting this though.
Main usage has been to build kernels based on different configurations,
not to mount src on a read-only media, that's sort of a side-effect.
> It is a bug that the current Makefile can't compile modules in an
> object directory different from the source directory. This means the
> module source tree can't be mounted read-only (again, without
> resorting to symlinks).
make -C path/to/kernel/src SUBDIRS=$PWD modules
So simple when you know the trick. That what I have documented
 Most of what I have done has been submitted to lkml within the
past month. It can be found at http://linux-sam.bkbits.net in
the kbuild repository, where it is queued for inclusion.
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This archive was generated by hypermail 2b29 : Thu Jan 23 2003 - 22:00:22 EST