virtualbox: Add patch for Linux 4.12

Compiling the kernel modules on Linux 4.12 fails, so I've included an
upstream patch from:

https://www.virtualbox.org/changeset/66927/vbox

The patch is applied against the guest additions as well, where we need
to transform the patch a bit so that we get CR LF line endings (DOS
format), which is what is the case for the guest additions ISO.

I've tested this with all the subtests of the "virtualbox" NixOS VM
tests and they all succeed on x86_64-linux.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/pkgs/applications/virtualization/virtualbox/guest-additions/default.nix b/pkgs/applications/virtualization/virtualbox/guest-additions/default.nix
index 3c9f28f4f2d5..8865022c23e4 100644
--- a/pkgs/applications/virtualization/virtualbox/guest-additions/default.nix
+++ b/pkgs/applications/virtualization/virtualbox/guest-additions/default.nix
@@ -62,6 +62,9 @@ stdenv.mkDerivation {
     for i in *
     do
         cd $i
+        # Files within the guest additions ISO are using DOS line endings
+        sed -re '/^(@@|---|\+\+\+)/!s/$/\r/' ${../linux-4.12.patch} \
+          | patch -d vboxguest -p4
         find . -type f | xargs sed 's/depmod -a/true/' -i
         make
         cd ..