Implement capturing payload on event notifier

[lttng-modules.git] / Makefile

diff --git a/Makefile b/Makefile
index dc44fd40b6cfb2834ef0b1e89861aa5e85ecafc4..c586efedc8c52538308fc9f81d3373d34709dc2b 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1,42 +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 += ltt-ring-buffer-client-discard.o
-obj-m += ltt-ring-buffer-client-overwrite.o
-obj-m += ltt-ring-buffer-metadata-client.o
+  # This part of the Makefile is used when called by the kernel build system
+  # and defines the modules to be built.
 
-obj-m += ltt-relay.o
-ltt-relay-objs :=  ltt-events.o ltt-debugfs-abi.o \
-                       ltt-probes.o ltt-core.o ltt-context.o \
-                       lttng-context-pid.o lttng-context-comm.o \
-                       lttng-context-prio.o lttng-context-nice.o
+  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
 
-ifneq ($(CONFIG_PERF_EVENTS),)
-ltt-relay-objs += lttng-context-perf-counters.o
-endif
+  TOP_LTTNG_MODULES_DIR := $(shell dirname $(lastword $(MAKEFILE_LIST)))
 
-obj-m += probes/
-obj-m += lib/
+  lttng_check_linux_version = $(shell pwd)/include/linux/version.h
+  lttng_check_generated_linux_version = $(shell pwd)/include/generated/uapi/linux/version.h
 
-endif
+  #
+  # 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
 
-else
-       KERNELDIR ?= /lib/modules/$(shell uname -r)/build
-       PWD := $(shell pwd)
-       CFLAGS = $(EXTCFLAGS)
+  obj-$(CONFIG_LTTNG) += src/
+  obj-$(CONFIG_LTTNG) += tests/
 
-default:
-       $(MAKE) -C $(KERNELDIR) M=$(PWD) modules
+else # KERNELRELEASE
+
+# 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
-       /sbin/depmod -a
+       $(MAKE) -C $(KERNELDIR) M=$(PWD) CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m modules_install
 
 clean:
        $(MAKE) -C $(KERNELDIR) M=$(PWD) clean
 
-endif
+%.i: %.c
+       $(MAKE) -C $(KERNELDIR) M=$(PWD) CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m $@
+
+endif # KERNELRELEASE