LP:1112442

[Herton Ronaldo Krzesinski]

On Fri, Feb 01, 2013 at 11:36:11AM -0500, Joseph Salisbury wrote:
> Hey Guys,
> 
> I have a quick question about bug 1112442[0].  The bug reports that
> the source symbolic link uses a path of /build/buildd.  I also
> confirmed this is the same behaviour in the latest raring release.
> Under /usr/src/linux-headers-3.8.0-2-generic, I see:
> 
> lrwxrwxrwx 1 root root     25 Jan 25 17:28 source ->
> /build/buildd/linux-3.8.0
> 
> Is this expected behaviour?  Would one just remove and re-create
> this link to point to wherever they have the actual source tree
> installed?

First, it doesn't seem useful or needed to have this source symlink
in the headers package. I did a bit of debugging and the source symlink
appears to be created by the kernel itself, when we run make
to populate the headers directory for the package, from the kernel
Makefile:

(...)
# outputmakefile generates a Makefile in the output directory, if using a
# separate output directory. This allows convenient use of make in the
# output directory.
outputmakefile:
ifneq ($(KBUILD_SRC),)
        $(Q)ln -fsn $(srctree) source
        $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
            $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
endif
(...)

So probably we may want this patch for our package (untested):

diff --git a/debian/rules.d/2-binary-arch.mk b/debian/rules.d/2-binary-arch.mk
index 07584ad..3600fe1 100644
--- a/debian/rules.d/2-binary-arch.mk
+++ b/debian/rules.d/2-binary-arch.mk
@@ -219,6 +219,8 @@ endif
 	# We'll symlink this stuff
 	rm -f $(hdrdir)/Makefile
 	rm -rf $(hdrdir)/include2
+	# Remove bogus source symlink
+	rm -f $(hdrdir)/source
 	# Copy over the compilation version.
 	cp "$(builddir)/build-$*/include/generated/compile.h" \
 		"$(hdrdir)/include/generated/compile.h"

Cc'ing our kernel ML so everyone can take a look and confirm/review
this.

> 
> Thanks,
> 
> Joe
> 
> [0] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1112442
> 

-- 
[]'s
Herton