Implement capturing payload on event notifier

[lttng-modules.git] / Makefile

diff --git a/Makefile b/Makefile
index a9d1cb15911ba8d16c4d9e2af301246b8e492c3b..c586efedc8c52538308fc9f81d3373d34709dc2b 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1,61 +1,57 @@
-#
-# Makefile for the LTT objects.
-#
+# SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
 
 ifneq ($(KERNELRELEASE),)
-ifneq ($(CONFIG_TRACEPOINTS),)
-
-obj-m += lttng-ring-buffer-client-discard.o
-obj-m += lttng-ring-buffer-client-overwrite.o
-obj-m += lttng-ring-buffer-metadata-client.o
-obj-m += lttng-ring-buffer-client-mmap-discard.o
-obj-m += lttng-ring-buffer-client-mmap-overwrite.o
-obj-m += lttng-ring-buffer-metadata-mmap-client.o
-
-obj-m += lttng-tracer.o
-lttng-tracer-objs :=  lttng-events.o lttng-abi.o \
-                       lttng-probes.o lttng-context.o \
-                       lttng-context-pid.o lttng-context-procname.o \
-                       lttng-context-prio.o lttng-context-nice.o \
-                       lttng-context-vpid.o lttng-context-tid.o \
-                       lttng-context-vtid.o lttng-context-ppid.o \
-                       lttng-context-vppid.o lttng-calibrate.o \
-                       lttng-context-hostname.o wrapper/random.o
-
-obj-m += lttng-statedump.o
-lttng-statedump-objs := lttng-statedump-impl.o wrapper/irqdesc.o \
-                       wrapper/fdtable.o
-
-ifneq ($(CONFIG_HAVE_SYSCALL_TRACEPOINTS),)
-lttng-tracer-objs += lttng-syscalls.o probes/lttng-probe-user.o
-endif # CONFIG_HAVE_SYSCALL_TRACEPOINTS
-
-ifneq ($(CONFIG_PERF_EVENTS),)
-lttng-tracer-objs += $(shell \
-       if [ $(VERSION) -ge 3 \
-               -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -ge 6 -a $(SUBLEVEL) -ge 33 \) ] ; then \
-               echo "lttng-context-perf-counters.o" ; fi;)
-endif # CONFIG_PERF_EVENTS
-
-obj-m += probes/
-obj-m += lib/
-
-endif # CONFIG_TRACEPOINTS
+
+  # This part of the Makefile is used when called by the kernel build system
+  # and defines the modules to be built.
+
+  ifdef CONFIG_LOCALVERSION    # Check if dot-config is included.
+    ifeq ($(CONFIG_TRACEPOINTS),)
+      $(error The option CONFIG_TRACEPOINTS needs to be enabled in your kernel configuration)
+    endif # CONFIG_TRACEPOINTS
+  endif # ifdef CONFIG_LOCALVERSION
+
+  TOP_LTTNG_MODULES_DIR := $(shell dirname $(lastword $(MAKEFILE_LIST)))
+
+  lttng_check_linux_version = $(shell pwd)/include/linux/version.h
+  lttng_check_generated_linux_version = $(shell pwd)/include/generated/uapi/linux/version.h
+
+  #
+  # Check for stale version.h, which can be a leftover from an old Linux
+  # kernel tree moved to a newer kernel version, only pruned by make
+  # distclean.
+  #
+  ifneq ($(wildcard $(lttng_check_linux_version)),)
+    ifneq ($(wildcard $(lttng_check_generated_linux_version)),)
+      $(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 $(lttng_check_linux_version) file)
+    endif
+  endif
+
+  obj-$(CONFIG_LTTNG) += src/
+  obj-$(CONFIG_LTTNG) += tests/
 
 else # KERNELRELEASE
-       KERNELDIR ?= /lib/modules/$(shell uname -r)/build
-       PWD := $(shell pwd)
-       CFLAGS = $(EXTCFLAGS)
 
-default:
-       $(MAKE) -C $(KERNELDIR) M=$(PWD) modules
+# This part of the Makefile is used when the 'make' command is runned in the
+# base directory of the lttng-modules sources. It sets some environment and
+# calls the kernel build system to build the actual modules.
+
+KERNELDIR ?= /lib/modules/$(shell uname -r)/build
+PWD := $(shell pwd)
+CFLAGS = $(EXTCFLAGS)
+
+default: modules
+
+modules:
+       $(MAKE) -C $(KERNELDIR) M=$(PWD) CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m modules
 
 modules_install:
-       $(MAKE) -C $(KERNELDIR) M=$(PWD) modules_install
+       $(MAKE) -C $(KERNELDIR) M=$(PWD) CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m modules_install
 
 clean:
        $(MAKE) -C $(KERNELDIR) M=$(PWD) clean
 
 %.i: %.c
-       $(MAKE) -C $(KERNELDIR) M=$(PWD) $@
+       $(MAKE) -C $(KERNELDIR) M=$(PWD) CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m $@
+
 endif # KERNELRELEASE