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     MAKEFILEDIR = $(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 $(MAKEFILEDIR)/Makefile.ABI.workarounds
  29
  30     obj-$(CONFIG_LTTNG) += lttng-ring-buffer-client-discard.o
  31     obj-$(CONFIG_LTTNG) += lttng-ring-buffer-client-overwrite.o
  32     obj-$(CONFIG_LTTNG) += lttng-ring-buffer-metadata-client.o
  33     obj-$(CONFIG_LTTNG) += lttng-ring-buffer-client-mmap-discard.o
  34     obj-$(CONFIG_LTTNG) += lttng-ring-buffer-client-mmap-overwrite.o
  35     obj-$(CONFIG_LTTNG) += lttng-ring-buffer-metadata-mmap-client.o
  36     obj-$(CONFIG_LTTNG) += lttng-clock.o
  37
  38     obj-$(CONFIG_LTTNG) += lttng-tracer.o
  39
  40     lttng-tracer-objs := lttng-events.o lttng-abi.o \
  41                          lttng-probes.o lttng-context.o \
  42                          lttng-context-pid.o lttng-context-procname.o \
  43                          lttng-context-prio.o lttng-context-nice.o \
  44                          lttng-context-vpid.o lttng-context-tid.o \
  45                          lttng-context-vtid.o lttng-context-ppid.o \
  46                          lttng-context-vppid.o lttng-context-cpu-id.o \
  47                          lttng-context-interruptible.o \
  48                          lttng-context-need-reschedule.o lttng-calibrate.o \
  49                          lttng-context-hostname.o wrapper/random.o \
  50                          probes/lttng.o wrapper/trace-clock.o \
  51                          wrapper/page_alloc.o \
  52                          lttng-tracker-pid.o \
  53                          lttng-filter.o lttng-filter-interpreter.o \
  54                          lttng-filter-specialize.o \
  55                          lttng-filter-validator.o \
  56                          probes/lttng-probe-user.o
  57
  58     ifneq ($(CONFIG_HAVE_SYSCALL_TRACEPOINTS),)
  59       lttng-tracer-objs += lttng-syscalls.o
  60     endif # CONFIG_HAVE_SYSCALL_TRACEPOINTS
  61
  62     ifneq ($(CONFIG_PERF_EVENTS),)
  63       lttng-tracer-objs += $(shell \
  64         if [ $(VERSION) -ge 3 \
  65           -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -ge 6 -a $(SUBLEVEL) -ge 33 \) ] ; then \
  66           echo "lttng-context-perf-counters.o" ; fi;)
  67     endif # CONFIG_PERF_EVENTS
  68
  69     ifneq ($(CONFIG_PREEMPT_RT_FULL),)
  70       lttng-tracer-objs += lttng-context-migratable.o
  71       lttng-tracer-objs += lttng-context-preemptible.o
  72     endif # CONFIG_PREEMPT_RT_FULL
  73
  74     ifneq ($(CONFIG_PREEMPT),)
  75       lttng-tracer-objs += lttng-context-preemptible.o
  76     endif
  77
  78     lttng-tracer-objs += $(shell \
  79       if [ $(VERSION) -ge 4 \
  80         -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -ge 15 -a $(SUBLEVEL) -ge 0 \) ] ; then \
  81         echo "lttng-tracepoint.o" ; fi;)
  82
  83     obj-$(CONFIG_LTTNG) += lttng-statedump.o
  84     lttng-statedump-objs := lttng-statedump-impl.o wrapper/irqdesc.o \
  85                             wrapper/fdtable.o
  86
  87     obj-$(CONFIG_LTTNG) += probes/
  88     obj-$(CONFIG_LTTNG) += lib/
  89
  90   endif # CONFIG_TRACEPOINTS
  91
  92 else # KERNELRELEASE
  93
  94 # This part of the Makefile is used when the 'make' command is runned in the
  95 # base directory of the lttng-modules sources. It sets some environment and
  96 # calls the kernel build system to build the actual modules.
  97
  98 KERNELDIR ?= /lib/modules/$(shell uname -r)/build
  99 PWD := $(shell pwd)
 100 CFLAGS = $(EXTCFLAGS)
 101
 102 default:
 103         $(MAKE) -C $(KERNELDIR) M=$(PWD) CONFIG_LTTNG=m modules
 104
 105 modules_install:
 106         $(MAKE) -C $(KERNELDIR) M=$(PWD) CONFIG_LTTNG=m modules_install
 107
 108 clean:
 109         $(MAKE) -C $(KERNELDIR) M=$(PWD) clean
 110
 111 %.i: %.c
 112         $(MAKE) -C $(KERNELDIR) M=$(PWD) CONFIG_LTTNG=m $@
 113
 114 endif # KERNELRELEASE