Makefile

   1 #
   2 # Makefile for the LTT objects.
   3 #
   4
   5 ifneq ($(KERNELRELEASE),)
   6
   7   # This part of the Makefile is used when called by the kernel build system
   8   # and defines the modules to be built.
   9
  10   ifneq ($(CONFIG_TRACEPOINTS),)
  11
  12     TOP_LTTNG_MODULES_DIR := $(shell dirname $(lastword $(MAKEFILE_LIST)))
  13
  14     lttng_check_linux_version = $(shell pwd)/include/linux/version.h
  15     lttng_check_generated_linux_version = $(shell pwd)/include/generated/uapi/linux/version.h
  16
  17     #
  18     # Check for stale version.h, which can be a leftover from an old Linux
  19     # kernel tree moved to a newer kernel version, only pruned by make
  20     # distclean.
  21     #
  22     ifneq ($(wildcard $(lttng_check_linux_version)),)
  23       ifneq ($(wildcard $(lttng_check_generated_linux_version)),)
  24         $(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)
  25       endif
  26     endif
  27
  28     include $(TOP_LTTNG_MODULES_DIR)/Makefile.ABI.workarounds
  29
  30     ccflags-y += -I$(TOP_LTTNG_MODULES_DIR)
  31
  32     obj-$(CONFIG_LTTNG) += lttng-ring-buffer-client-discard.o
  33     obj-$(CONFIG_LTTNG) += lttng-ring-buffer-client-overwrite.o
  34     obj-$(CONFIG_LTTNG) += lttng-ring-buffer-metadata-client.o
  35     obj-$(CONFIG_LTTNG) += lttng-ring-buffer-client-mmap-discard.o
  36     obj-$(CONFIG_LTTNG) += lttng-ring-buffer-client-mmap-overwrite.o
  37     obj-$(CONFIG_LTTNG) += lttng-ring-buffer-metadata-mmap-client.o
  38     obj-$(CONFIG_LTTNG) += lttng-clock.o
  39
  40     obj-$(CONFIG_LTTNG) += lttng-tracer.o
  41
  42     lttng-tracer-objs := lttng-events.o lttng-abi.o \
  43                          lttng-probes.o lttng-context.o \
  44                          lttng-context-pid.o lttng-context-procname.o \
  45                          lttng-context-prio.o lttng-context-nice.o \
  46                          lttng-context-vpid.o lttng-context-tid.o \
  47                          lttng-context-vtid.o lttng-context-ppid.o \
  48                          lttng-context-vppid.o lttng-context-cpu-id.o \
  49                          lttng-context-interruptible.o \
  50                          lttng-context-need-reschedule.o lttng-calibrate.o \
  51                          lttng-context-hostname.o wrapper/random.o \
  52                          probes/lttng.o wrapper/trace-clock.o \
  53                          wrapper/page_alloc.o \
  54                          lttng-tracker-pid.o \
  55                          lttng-filter.o lttng-filter-interpreter.o \
  56                          lttng-filter-specialize.o \
  57                          lttng-filter-validator.o \
  58                          probes/lttng-probe-user.o
  59
  60     ifneq ($(CONFIG_HAVE_SYSCALL_TRACEPOINTS),)
  61       lttng-tracer-objs += lttng-syscalls.o
  62     endif # CONFIG_HAVE_SYSCALL_TRACEPOINTS
  63
  64     ifneq ($(CONFIG_PERF_EVENTS),)
  65       lttng-tracer-objs += $(shell \
  66         if [ $(VERSION) -ge 3 \
  67           -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -ge 6 -a $(SUBLEVEL) -ge 33 \) ] ; then \
  68           echo "lttng-context-perf-counters.o" ; fi;)
  69     endif # CONFIG_PERF_EVENTS
  70
  71     ifneq ($(CONFIG_PREEMPT_RT_FULL),)
  72       lttng-tracer-objs += lttng-context-migratable.o
  73       lttng-tracer-objs += lttng-context-preemptible.o
  74     endif # CONFIG_PREEMPT_RT_FULL
  75
  76     ifneq ($(CONFIG_PREEMPT),)
  77       lttng-tracer-objs += lttng-context-preemptible.o
  78     endif
  79
  80     lttng-tracer-objs += $(shell \
  81       if [ $(VERSION) -ge 4 \
  82         -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -ge 15 -a $(SUBLEVEL) -ge 0 \) ] ; then \
  83         echo "lttng-tracepoint.o" ; fi;)
  84
  85     obj-$(CONFIG_LTTNG) += lttng-statedump.o
  86     lttng-statedump-objs := lttng-statedump-impl.o wrapper/irqdesc.o \
  87                             wrapper/fdtable.o
  88
  89     obj-$(CONFIG_LTTNG) += probes/
  90     obj-$(CONFIG_LTTNG) += lib/
  91
  92   endif # CONFIG_TRACEPOINTS
  93
  94 else # KERNELRELEASE
  95
  96 # This part of the Makefile is used when the 'make' command is runned in the
  97 # base directory of the lttng-modules sources. It sets some environment and
  98 # calls the kernel build system to build the actual modules.
  99
 100 KERNELDIR ?= /lib/modules/$(shell uname -r)/build
 101 PWD := $(shell pwd)
 102 CFLAGS = $(EXTCFLAGS)
 103
 104 default:
 105         $(MAKE) -C $(KERNELDIR) M=$(PWD) CONFIG_LTTNG=m modules
 106
 107 modules_install:
 108         $(MAKE) -C $(KERNELDIR) M=$(PWD) CONFIG_LTTNG=m modules_install
 109
 110 clean:
 111         $(MAKE) -C $(KERNELDIR) M=$(PWD) clean
 112
 113 %.i: %.c
 114         $(MAKE) -C $(KERNELDIR) M=$(PWD) CONFIG_LTTNG=m $@
 115
 116 endif # KERNELRELEASE