Fix: timer_expire_entry changed in 4.19.312

[lttng-modules.git] / Makefile

diff --git a/Makefile b/Makefile
index f233e660473b8b21167d8ecea5a4b3593fcdd692..8d25816cc053e03e6d8707fc281b0687bf9b81e9 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1,92 +1,66 @@
-#
-# Makefile for the LTT objects.
-#
+# SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
 
 ifneq ($(KERNELRELEASE),)
-ifneq ($(CONFIG_TRACEPOINTS),)
 
-KERNELDIR=${LTTNG_KERNELDIR}
+# This part of the Makefile is used when called by the kernel build system
+# and defines the modules to be built.
 
-lttng_check_linux_version = $(shell pwd)/include/linux/version.h
-lttng_check_generated_linux_version = $(shell pwd)/include/generated/uapi/linux/version.h
+obj-$(CONFIG_LTTNG) += src/
 
-#
-# 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 $(lttng_check_linux_version) file)
-endif
+else # KERNELRELEASE
+
+# This part of the Makefile is used when the 'make' command is runned in the
+# base directory of the lttng-modules sources. It sets some environment and
+# calls the kernel build system to build the actual modules.
+
+KERNELDIR ?= /lib/modules/$(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
 
-include $(KBUILD_EXTMOD)/Makefile.ABI.workarounds
-
-obj-m += lttng-ring-buffer-client-discard.o
-obj-m += lttng-ring-buffer-client-overwrite.o
-obj-m += lttng-ring-buffer-metadata-client.o
-obj-m += lttng-ring-buffer-client-mmap-discard.o
-obj-m += lttng-ring-buffer-client-mmap-overwrite.o
-obj-m += lttng-ring-buffer-metadata-mmap-client.o
-
-obj-m += lttng-tracer.o
-lttng-tracer-objs :=  lttng-events.o lttng-abi.o \
-                       lttng-probes.o lttng-context.o \
-                       lttng-context-pid.o lttng-context-procname.o \
-                       lttng-context-prio.o lttng-context-nice.o \
-                       lttng-context-vpid.o lttng-context-tid.o \
-                       lttng-context-vtid.o lttng-context-ppid.o \
-                       lttng-context-vppid.o lttng-context-cpu-id.o \
-                       lttng-calibrate.o \
-                       lttng-context-hostname.o wrapper/random.o \
-                       probes/lttng.o wrapper/trace-clock.o \
-                       wrapper/page_alloc.o \
-                       lttng-tracker-pid.o \
-                       lttng-filter.o lttng-filter-interpreter.o \
-                       lttng-filter-specialize.o \
-                       lttng-filter-validator.o \
-                       probes/lttng-probe-user.o
-
-obj-m += lttng-statedump.o
-lttng-statedump-objs := lttng-statedump-impl.o wrapper/irqdesc.o \
-                       wrapper/fdtable.o
-
-ifneq ($(CONFIG_HAVE_SYSCALL_TRACEPOINTS),)
-lttng-tracer-objs += lttng-syscalls.o
-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
-
-lttng-tracer-objs += $(shell \
-       if [ $(VERSION) -ge 4 \
-               -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -ge 15 -a $(SUBLEVEL) -ge 0 \) ] ; then \
-               echo "lttng-tracepoint.o" ; fi;)
-
-obj-m += probes/
-obj-m += lib/
-
-endif # CONFIG_TRACEPOINTS
+default: modules
 
-else # KERNELRELEASE
-       KERNELDIR ?= /lib/modules/$(shell uname -r)/build
-       PWD := $(shell pwd)
-       CFLAGS = $(EXTCFLAGS)
+modules:
+       $(MAKE) -C $(KERNELDIR) M=$(PWD)/src \
+               CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m \
+               KCPPFLAGS='$(LKCPPFLAGS)' \
+               modules
 
-default:
-       LTTNG_KERNELDIR=$(KERNELDIR) $(MAKE) -C $(KERNELDIR) M=$(PWD) modules
+syscalls_extractor:
+       $(MAKE) -C $(KERNELDIR) M=$(PWD)/src \
+               CONFIG_LTTNG_SYSCALLS_EXTRACTOR=m \
+               CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m \
+               KCPPFLAGS='$(LKCPPFLAGS)' \
+               modules
 
 modules_install:
-       LTTNG_KERNELDIR=$(KERNELDIR) $(MAKE) -C $(KERNELDIR) M=$(PWD) modules_install
+       $(MAKE) -C $(KERNELDIR) M=$(PWD)/src \
+               CONFIG_LTTNG=m CONFIG_LTTNG_CLOCK_PLUGIN_TEST=m \
+               KCPPFLAGS='$(LKCPPFLAGS)' \
+               modules_install
 
 clean:
-       LTTNG_KERNELDIR=$(KERNELDIR) $(MAKE) -C $(KERNELDIR) M=$(PWD) clean
+       $(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
-       LTTNG_KERNELDIR=$(KERNELDIR) $(MAKE) -C $(KERNELDIR) M=$(PWD) $@
+       $(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