Makefile

   1 # SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
   2
   3 ifneq ($(KERNELRELEASE),)
   4
   5 # This part of the Makefile is used when called by the kernel build system
   6 # and defines the modules to be built.
   7
   8 obj-$(CONFIG_LTTNG) += src/
   9
  10 else # KERNELRELEASE
  11
  12 # This part of the Makefile is used when the 'make' command is runned in the
  13 # base directory of the lttng-modules sources. It sets some environment and
  14 # calls the kernel build system to build the actual modules.
  15
  16 KERNELDIR ?= /lib/modules/$(shell uname -r)/build
  17 PWD := $(shell pwd)
  18 CFLAGS = $(EXTCFLAGS)
  19
  20 default: modules
  21
  22 modules:
  23         $(MAKE) -C $(KERNELDIR) M=$(PWD)/src CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m modules
  24
  25 modules_install:
  26         $(MAKE) -C $(KERNELDIR) M=$(PWD)/src CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m modules_install
  27
  28 clean:
  29         $(MAKE) -C $(KERNELDIR) M=$(PWD)/src clean
  30
  31 %.i: %.c
  32         $(MAKE) -C $(KERNELDIR) M=$(PWD)/src CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m $@
  33
  34 endif # KERNELRELEASE