-#
-# 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
-obj-m += ltt-ring-buffer-client-mmap-discard.o
-obj-m += ltt-ring-buffer-client-mmap-overwrite.o
-obj-m += ltt-ring-buffer-metadata-mmap-client.o
-
-obj-m += ltt-relay.o
-ltt-relay-objs := ltt-events.o ltt-debugfs-abi.o \
- ltt-probes.o ltt-context.o \
- lttng-context-pid.o lttng-context-comm.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
-
-ifneq ($(CONFIG_PERF_EVENTS),)
-ltt-relay-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
-obj-m += probes/
-obj-m += lib/
+# This part of the Makefile is used when called by the kernel build system
+# and defines the modules to be built.
+
+obj-$(CONFIG_LTTNG) += src/
+
+else # KERNELRELEASE
+
+# This part of the Makefile is used when the 'make' command is runned in the
+# base directory of the lttng-modules sources. It sets some environment and
+# calls the kernel build system to build the actual modules.
+KERNELDIR ?= /lib/modules/$(shell uname -r)/build
+PWD := $(shell pwd)
+
+# Experimental bitwise enum defaults to disabled.
+CONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM ?= n
+
+# Emulate Kconfig behavior of setting defines for config options.
+LKCPPFLAGS = $(KCPPFLAGS)
+ifeq ($(CONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM),y)
+LKCPPFLAGS += -DCONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM=y
endif
-else
- KERNELDIR ?= /lib/modules/$(shell uname -r)/build
- PWD := $(shell pwd)
- CFLAGS = $(EXTCFLAGS)
+default: modules
-default:
- $(MAKE) -C $(KERNELDIR) M=$(PWD) modules
+modules:
+ $(MAKE) -C $(KERNELDIR) M=$(PWD)/src \
+ CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m \
+ KCPPFLAGS='$(LKCPPFLAGS)' \
+ modules
modules_install:
- $(MAKE) -C $(KERNELDIR) M=$(PWD) modules_install
- /sbin/depmod -a
+ $(MAKE) -C $(KERNELDIR) M=$(PWD)/src \
+ CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m \
+ KCPPFLAGS='$(LKCPPFLAGS)' \
+ modules_install
clean:
- $(MAKE) -C $(KERNELDIR) M=$(PWD) clean
-
-endif
+ $(MAKE) -C $(KERNELDIR) M=$(PWD)/src clean
+
+# The following targets are used for development and debugging. They are not
+# part of the build system.
+%.i: %.c
+ $(MAKE) -C $(KERNELDIR) M=$(PWD) \
+ CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m \
+ KCPPFLAGS='$(LKCPPFLAGS)' \
+ $@
+
+%.o: %.c
+ $(MAKE) -C $(KERNELDIR) M=$(PWD) \
+ CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m \
+ KCPPFLAGS='$(LKCPPFLAGS)' \
+ $@
+
+endif # KERNELRELEASE