Ubuntu – I think “/lib/modules/$(uname -r)/build” points to incorrect folder

One of the kernel package scripts wasn't working right, so it was trying to copy crypto.master and failing. Below is a patch I made to fix it, although the source package still doesn't include the debian and debian.master folders outside the tar archive like the official Ubuntu kernel source packages.

--- /usr/share/kernel-package/ruleset/targets/source.mk 2009-08-21 09:47:53.000000000 -0400
+++ /usr/share/kernel-package/ruleset/targets/source.mkmod  2011-02-28 14:42:22.000000000 -0500
@@ -64,12 +64,10 @@ debian/stamp/install/$(s_package):
 ####
 ######################################################################
 ifneq ($(strip $(int_follow_symlinks_in_src)),)
-   -tar cfh - $$(echo * | sed -e 's/ debian//g' -e 's/\.deb//g' ) |       \
-   (cd $(SRCDIR); umask 000; tar xpsf -)
+   -(umask 000; find . -mindepth 1 -maxdepth 1 -not -name '*.deb' -not -name 'debian*' -exec cp -Lr {} $(SRCDIR) \;; )
    (cd $(SRCDIR)/include; rm -rf asm ; )
 else
-   -tar cf - $$(echo * | sed -e 's/ debian//g' -e 's/\.deb//g' ) |         \
-   (cd $(SRCDIR); umask 000; tar xspf -)
+   -(umask 000; find . -mindepth 1 -maxdepth 1 -not -name '*.deb' -not -name 'debian*' -exec cp -r {} $(SRCDIR) \;; )
    (cd $(SRCDIR)/include; rm -f asm ; )
 endif
    $(install_file) debian/changelog      $(SRCDIR)/Debian.src.changelog

To answer the first question Why are there only two packages? or Why aren't there two header files? -- when they're cross compiled, they're packaged up to handle every use case. By splitting the headers into a larger all package and a smaller arch-specific one, you save bandwidth pushing them out to users. When you're doing it yourself, you only need it for one arch so one headers file will do.

As for the symlink through to your source location, I have had the same issue. I have not found a good fix other than to also generate a linux_source package (just add that on after kernel_image kernel_headers) and then fix the symlink manually.

There is actually a question all about this side of things already. The long-term solution seems to be hacking in a script that runs after each kernel installation that just fixes the symink up.