From 4ed356fa719e8923c231524181e15ab67eb37bac Mon Sep 17 00:00:00 2001 From: Paul Spooren Date: Tue, 8 Oct 2019 13:11:27 -1000 Subject: [PATCH] kernel.mk: add KCFLAGS to make kmods reproducible Some kmods (gpio-hotplug, wireguard) store the build path in the compiled files and therefore make it harder to rebuild the official binaries. As the same "iremap" function is used as for other binaries, the change is compatible with gcc7 and 8. Tested with both gcc7 and gcc8 resulting in build path independent reproducible builds. Signed-off-by: Paul Spooren --- include/kernel.mk | 1 + 1 file changed, 1 insertion(+) diff --git a/include/kernel.mk b/include/kernel.mk index 73645330fe..439e910ebf 100644 --- a/include/kernel.mk +++ b/include/kernel.mk @@ -104,6 +104,7 @@ endif KERNEL_MAKE = $(MAKE) $(KERNEL_MAKEOPTS) KERNEL_MAKE_FLAGS = \ + KCFLAGS="$(call iremap,$(BUILD_DIR),$(notdir $(BUILD_DIR)))" \ HOSTCFLAGS="$(HOST_CFLAGS) -Wall -Wmissing-prototypes -Wstrict-prototypes" \ CROSS_COMPILE="$(KERNEL_CROSS)" \ ARCH="$(LINUX_KARCH)" \