Makefile

   1 # SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
   2
   3 ifneq ($(KERNELRELEASE),)
   4
   5   # This part of the Makefile is used when called by the kernel build system
   6   # and defines the modules to be built.
   7
   8   ifdef CONFIG_LOCALVERSION     # Check if dot-config is included.
   9     ifeq ($(CONFIG_TRACEPOINTS),)
  10       $(error The option CONFIG_TRACEPOINTS needs to be enabled in your kernel configuration)
  11     endif # CONFIG_TRACEPOINTS
  12   endif # ifdef CONFIG_LOCALVERSION
  13
  14   TOP_LTTNG_MODULES_DIR := $(shell dirname $(lastword $(MAKEFILE_LIST)))
  15
  16   lttng_check_linux_version = $(shell pwd)/include/linux/version.h
  17   lttng_check_generated_linux_version = $(shell pwd)/include/generated/uapi/linux/version.h
  18
  19   #
  20   # Check for stale version.h, which can be a leftover from an old Linux
  21   # kernel tree moved to a newer kernel version, only pruned by make
  22   # distclean.
  23   #
  24   ifneq ($(wildcard $(lttng_check_linux_version)),)
  25     ifneq ($(wildcard $(lttng_check_generated_linux_version)),)
  26       $(error Duplicate version.h files found in $(lttng_check_linux_version) and $(lttng_check_generated_linux_version). Consider running make distclean on your kernel, or removing the stale $(lttng_check_linux_version) file)
  27     endif
  28   endif
  29
  30   include $(TOP_LTTNG_MODULES_DIR)/Kbuild.common
  31
  32   ccflags-y += -I$(TOP_LTTNG_MODULES_DIR)
  33
  34   obj-$(CONFIG_LTTNG) += lttng-ring-buffer-client-discard.o
  35   obj-$(CONFIG_LTTNG) += lttng-ring-buffer-client-overwrite.o
  36   obj-$(CONFIG_LTTNG) += lttng-ring-buffer-metadata-client.o
  37   obj-$(CONFIG_LTTNG) += lttng-ring-buffer-client-mmap-discard.o
  38   obj-$(CONFIG_LTTNG) += lttng-ring-buffer-client-mmap-overwrite.o
  39   obj-$(CONFIG_LTTNG) += lttng-ring-buffer-metadata-mmap-client.o
  40   obj-$(CONFIG_LTTNG) += lttng-clock.o
  41
  42   obj-$(CONFIG_LTTNG) += lttng-tracer.o
  43
  44   lttng-tracer-objs := lttng-events.o lttng-abi.o lttng-string-utils.o \
  45                        lttng-probes.o lttng-context.o \
  46                        lttng-context-pid.o lttng-context-procname.o \
  47                        lttng-context-prio.o lttng-context-nice.o \
  48                        lttng-context-vpid.o lttng-context-tid.o \
  49                        lttng-context-vtid.o lttng-context-ppid.o \
  50                        lttng-context-vppid.o lttng-context-cpu-id.o \
  51                        lttng-context-interruptible.o \
  52                        lttng-context-need-reschedule.o \
  53                        lttng-context-callstack.o lttng-calibrate.o \
  54                        lttng-context-hostname.o wrapper/random.o \
  55                        probes/lttng.o wrapper/trace-clock.o \
  56                        wrapper/page_alloc.o \
  57                        lttng-tracker-pid.o \
  58                        lttng-filter.o lttng-filter-interpreter.o \
  59                        lttng-filter-specialize.o \
  60                        lttng-filter-validator.o \
  61                        probes/lttng-probe-user.o \
  62                        lttng-tp-mempool.o
  63
  64   ifneq ($(CONFIG_HAVE_SYSCALL_TRACEPOINTS),)
  65     lttng-tracer-objs += lttng-syscalls.o
  66   endif # CONFIG_HAVE_SYSCALL_TRACEPOINTS
  67
  68   ifneq ($(CONFIG_PERF_EVENTS),)
  69     lttng-tracer-objs += $(shell \
  70       if [ $(VERSION) -ge 3 \
  71         -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 33 \) ] ; then \
  72         echo "lttng-context-perf-counters.o" ; fi;)
  73   endif # CONFIG_PERF_EVENTS
  74
  75   ifneq ($(CONFIG_PREEMPT_RT_FULL),)
  76     lttng-tracer-objs += lttng-context-migratable.o
  77     lttng-tracer-objs += lttng-context-preemptible.o
  78   endif # CONFIG_PREEMPT_RT_FULL
  79
  80   ifneq ($(CONFIG_PREEMPT),)
  81     lttng-tracer-objs += lttng-context-preemptible.o
  82   endif
  83
  84   lttng-tracer-objs += $(shell \
  85     if [ $(VERSION) -ge 4 \
  86       -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -ge 15 \) ] ; then \
  87       echo "lttng-tracepoint.o" ; fi;)
  88
  89   obj-$(CONFIG_LTTNG) += lttng-statedump.o
  90   lttng-statedump-objs := lttng-statedump-impl.o wrapper/irqdesc.o \
  91                           wrapper/fdtable.o
  92
  93   obj-$(CONFIG_LTTNG) += probes/
  94   obj-$(CONFIG_LTTNG) += lib/
  95   obj-$(CONFIG_LTTNG) += tests/
  96
  97 else # KERNELRELEASE
  98
  99 # This part of the Makefile is used when the 'make' command is runned in the
 100 # base directory of the lttng-modules sources. It sets some environment and
 101 # calls the kernel build system to build the actual modules.
 102
 103 KERNELDIR ?= /lib/modules/$(shell uname -r)/build
 104 PWD := $(shell pwd)
 105 CFLAGS = $(EXTCFLAGS)
 106
 107 default: modules
 108
 109 modules:
 110         $(MAKE) -C $(KERNELDIR) M=$(PWD) CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m modules
 111
 112 modules_install:
 113         $(MAKE) -C $(KERNELDIR) M=$(PWD) CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m modules_install
 114
 115 clean:
 116         $(MAKE) -C $(KERNELDIR) M=$(PWD) clean
 117
 118 %.i: %.c
 119         $(MAKE) -C $(KERNELDIR) M=$(PWD) CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m $@
 120
 121 endif # KERNELRELEASE