[Pkg-virtualbox-devel] Bug#785161: kbuild: module-assistant fails to build virtualbox-source

[Lorenzo]

Package: kbuild
Version: 1:0.1.9998svn2780+dfsg-1
Severity: important

Dear Maintainer,

when I try to build virtualbox kernel modules using 
# m-a build virtualbox-source 
 the build fails with the following error:

  CC [M]  /usr/src/modules/virtualbox/vboxdrv/r0drv/memobj-r0drv.o            
 │   CC [M]  /usr/src/modules/virtualbox/vboxdrv/r0drv/mpnotification-r0drv.o    
 │   CC [M]                                                                      
 │ /usr/src/modules/virtualbox/vboxdrv/r0drv/powernotification-r0drv.o           
 │ ld: cannot open linker script file                                            
 │ /usr/src/modules/virtualbox/vboxdrv/r0drv/.tmp_: No such file or directory    
 │ kmk[3]: ***                                                                   
 │ [/usr/src/modules/virtualbox/vboxdrv/r0drv/mpnotification-r0drv.o] Error 1    
 │ kmk[3]: *** Waiting for unfinished jobs....                                   
 │ kmk[3]: Leaving directory `/home/ombra/Downloads/linux-van-4.0.1'             
 │ kmk[3]: Entering directory `/home/ombra/Downloads/linux-van-4.0.1'            
 │ kmk[3]: *** Exiting with status 2                                             
 │ kmk[2]: *** [/usr/src/modules/virtualbox/vboxdrv] Error 2                     
 │ kmk[2]: Leaving directory `/home/ombra/Downloads/linux-van-4.0.1'
kmk[1]: *** [_module_/usr/src/modules/virtualbox] Error 2                     
 │ kmk[1]: Leaving directory `/home/ombra/Downloads/linux-van-4.0.1'             
 │ kmk: *** [binary-modules] Error 2                                             
 │ /usr/share/modass/include/common-rules.make:56: recipe for target             
 │ 'kdist_build' failed                                                          
 │ make: *** [kdist_build] Error 2 

Note that this problem is related to kbuild and m-a but does not affect the dkms building system.
I file this bug against kbuild because downgrading m-a itself or virtualbox-source package to a previuos version doesn't solve the problem, while downgrading kbuild to the stable version (1:0.1.9998svn2695+dfsg-2) allow me to build virtualbox modules.

Thanks

Lorenzo


-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.0.1-van (SMP w/2 CPU cores; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages kbuild depends on:
ii  libc6  2.19-18

kbuild recommends no packages.

kbuild suggests no packages.

-- no debconf information