buildroot

################################################################################

# Linux RTAI extensions

#

# Patch the linux kernel with RTAI extension

################################################################################

​

ifeq ($(BR2_LINUX_KERNEL_EXT_RTAI),y)

# Add dependency to RTAI (user-space) which provide kernel patches

LINUX_DEPENDENCIES += rtai-patch

​

RTAI_PATCH = $(call qstrip,$(BR2_LINUX_KERNEL_EXT_RTAI_PATCH))

​

ifeq ($(KERNEL_ARCH),i386)

RTAI_ARCH = x86

else ifeq ($(KERNEL_ARCH),x86_64)

RTAI_ARCH = x86

else ifeq ($(KERNEL_ARCH),powerpc)

RTAI_ARCH = ppc

else

RTAI_ARCH = $(KERNEL_ARCH)

endif

​

# Prepare kernel patch

ifeq ($(RTAI_PATCH),)

define RTAI_PREPARE_KERNEL

    kver=`$(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) --no-print-directory -s kernelversion` ; \

    if test -f $(RTAI_DIR)/base/arch/$(RTAI_ARCH)/patches/hal-linux-$${kver}-*patch ; then \

        support/scripts/apply-patches.sh $(LINUX_DIR)       \

            $(RTAI_DIR)/base/arch/$(RTAI_ARCH)/patches/     \

            hal-linux-$${kver}-*patch ; \

    else \

        echo "No RTAI patch for your kernel version" ; \

        exit 1 ; \

    fi

endef

else

define RTAI_PREPARE_KERNEL

    support/scripts/apply-patches.sh    \

        $(LINUX_DIR)            \

        $(dir $(RTAI_PATCH))        \

        $(notdir $(RTAI_PATCH))

endef

endif

​

LINUX_PRE_PATCH_HOOKS += RTAI_PREPARE_KERNEL

​

endif #BR2_LINUX_EXT_RTAI