Makefile

   1 # SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
   2 # SPDX-FileCopyrightText: 2010-2024 EfficiOS Inc.
   3
   4 ifneq ($(KERNELRELEASE),)
   5
   6 # This part of the Makefile is used when called by the kernel build system
   7 # and defines the modules to be built.
   8
   9 obj-$(CONFIG_LTTNG) += src/
  10
  11 else # KERNELRELEASE
  12
  13 # This part of the Makefile is used when the 'make' command is runned in the
  14 # base directory of the lttng-modules sources. It sets some environment and
  15 # calls the kernel build system to build the actual modules.
  16
  17 KERNELDIR ?= /lib/modules/$(shell uname -r)/build
  18 PWD := $(shell pwd)
  19
  20 # Experimental bitwise enum defaults to disabled.
  21 CONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM ?= n
  22
  23 # Emulate Kconfig behavior of setting defines for config options.
  24 LKCPPFLAGS = $(KCPPFLAGS)
  25 ifeq ($(CONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM),y)
  26 LKCPPFLAGS += -DCONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM=y
  27 endif
  28
  29 default: modules
  30
  31 modules:
  32         $(MAKE) -C $(KERNELDIR) M=$(PWD)/src \
  33                 CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m \
  34                 KCPPFLAGS='$(LKCPPFLAGS)' \
  35                 modules
  36
  37 syscalls_extractor:
  38         $(MAKE) -C $(KERNELDIR) M=$(PWD)/src \
  39                 CONFIG_LTTNG_SYSCALLS_EXTRACTOR=m \
  40                 CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m \
  41                 KCPPFLAGS='$(LKCPPFLAGS)' \
  42                 modules
  43
  44 modules_install:
  45         $(MAKE) -C $(KERNELDIR) M=$(PWD)/src \
  46                 CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m \
  47                 KCPPFLAGS='$(LKCPPFLAGS)' \
  48                 modules_install
  49
  50 clean:
  51         $(MAKE) -C $(KERNELDIR) M=$(PWD)/src clean
  52
  53 # The following targets are used for development and debugging. They are not
  54 # part of the build system.
  55 %.i: %.c
  56         $(MAKE) -C $(KERNELDIR) M=$(PWD) \
  57                 CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m \
  58                 KCPPFLAGS='$(LKCPPFLAGS)' \
  59                 $@
  60
  61 %.o: %.c
  62         $(MAKE) -C $(KERNELDIR) M=$(PWD) \
  63                 CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m \
  64                 KCPPFLAGS='$(LKCPPFLAGS)' \
  65                 $@
  66
  67 endif # KERNELRELEASE