kernel: use LDFLAGS when linking modules

kernel: use LDFLAGS when linking modules

Currently, linking module objects is simply using $(LD), assuming that
the default emulation is correct for the current architecture.

However, that miught not be the case when the toolchain default is not
the same as the current arch. For example, if the toolchain defaults to
i386 and is capable of x86_64, and we’re targetting x86_64 (or the
opposite), the link would fail because the ld emulation is incorrect
(long paths were elided in the following trace):

.../i686-pc-linux-gnu-ld: Relocatable linking with relocations from
format elf64-x86-64 (.../nvidia-driver-370.23/kernel/nvidia/nv-frontend.o)
to format elf32-i386 (.../nvidia-driver-370.23/kernel/nvidia/nv-interface.o)
is not supported

Add use of $(LDFLAGS) when doing the link, as the kernel provides the
proper emulation in those.

Signed-off-by: “Yann E. MORIN” yann.morin.1998@free.fr

diff -durN nvidia-driver-370.23.orig/kernel/nvidia/nvidia.Kbuild nvidia-driver-370.23/kernel/nvidia/nvidia.Kbuild
— nvidia-driver-370.23.orig/kernel/nvidia/nvidia.Kbuild 2016-08-09 01:57:50.000000000 +0200
+++ nvidia-driver-370.23/kernel/nvidia/nvidia.Kbuild 2016-08-20 12:25:02.780233423 +0200
@@ -87,7 +87,7 @@
always += $(NVIDIA_INTERFACE)

(obj)/(NVIDIA_INTERFACE): (addprefix (obj)/,$(NVIDIA_OBJECTS))

  • (LD) -r -o @ $^
  • (LD) (LDFLAGS) -r -o @ ^

diff -durN nvidia-driver-370.23.orig/kernel/nvidia-modeset/nvidia-modeset.Kbuild nvidia-driver-370.23/kernel/nvidia-modeset/nvidia-modeset.Kbuild
— nvidia-driver-370.23.orig/kernel/nvidia-modeset/nvidia-modeset.Kbuild 2016-08-09 01:43:19.000000000 +0200
+++ nvidia-driver-370.23/kernel/nvidia-modeset/nvidia-modeset.Kbuild 2016-08-20 12:25:39.596772662 +0200
@@ -70,7 +70,7 @@
always += $(NVIDIA_MODESET_INTERFACE)

(obj)/(NVIDIA_MODESET_INTERFACE): (addprefix (obj)/,$(NVIDIA_MODESET_OBJECTS))

  • (LD) -r -o @ $^
  • (LD) (LDFLAGS) -r -o @ ^

Register the conftests needed by nvidia-modeset.ko