Like the sysdig dkms module (bug 1802240), the lttng module cannot be built on Bionic-4.18 as well (ok on Xenial-4.15).
Build log:
$ cat /var/lib/dkms/lttng-modules/2.10.5/build/make.log
DKMS make.log for lttng-modules-2.10.5 for kernel 4.18.0-11-generic (x86_64)
Fri Nov 9 04:27:15 UTC 2018
make: Entering directory '/usr/src/linux-headers-4.18.0-11-generic'
Makefile:982: "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel"
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-ring-buffer-client-discard.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-ring-buffer-client-overwrite.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-ring-buffer-metadata-client.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-ring-buffer-client-mmap-discard.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-ring-buffer-client-mmap-overwrite.o
/var/lib/dkms/lttng-modules/2.10.5/build/probes/Kbuild:41: File ./arch/x86/kvm/lapic.h not found. Probe "kvm" x86-specific is disabled. Use full kernel source tree to enable it.
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/tests/probes/lttng-test.o
/var/lib/dkms/lttng-modules/2.10.5/build/probes/Kbuild:166: Files ./fs/btrfs/*.h not found. Probe "btrfs" is disabled. Use full kernel source tree to enable it.
/var/lib/dkms/lttng-modules/2.10.5/build/probes/Kbuild:182: Files ./fs/ext4/*.h not found. Probe "ext4" is disabled. Use full kernel source tree to enable it.
/var/lib/dkms/lttng-modules/2.10.5/build/probes/Kbuild:215: File ./drivers/base/regmap/trace.h not found. Probe "regmap" is disabled. Need Linux 4.1+ kernel source tree to enable it.
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lib/ringbuffer/ring_buffer_backend.o
/var/lib/dkms/lttng-modules/2.10.5/build/probes/Kbuild:265: Files ./kernel/trace/trace.h not found. Probe "ftrace" is disabled. Use full kernel source tree to enable it.
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/probes/lttng-probe-sched.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/tests/clock-plugin/lttng-clock-plugin-test.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lib/ringbuffer/ring_buffer_frontend.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lib/ringbuffer/ring_buffer_iterator.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lib/ringbuffer/ring_buffer_vfs.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-ring-buffer-metadata-mmap-client.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-clock.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-events.o
LD [M] /var/lib/dkms/lttng-modules/2.10.5/build/tests/lttng-test.o
LD [M] /var/lib/dkms/lttng-modules/2.10.5/build/tests/lttng-clock-plugin-test.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-abi.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/probes/lttng-probe-irq.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-string-utils.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-probes.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lib/ringbuffer/ring_buffer_splice.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-context.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lib/ringbuffer/ring_buffer_mmap.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lib/prio_heap/lttng_prio_heap.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-context-pid.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/probes/lttng-probe-timer.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lib/../wrapper/splice.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-context-procname.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-context-prio.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-context-nice.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-context-vpid.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/probes/lttng-probe-kmem.o
In file included from /var/lib/dkms/lttng-modules/2.10.5/build/probes/../probes/define_trace.h:100:0,
from /var/lib/dkms/lttng-modules/2.10.5/build/probes/../instrumentation/events/lttng-module/timer.h:332,
from /var/lib/dkms/lttng-modules/2.10.5/build/probes/lttng-probe-timer.c:43:
/var/lib/dkms/lttng-modules/2.10.5/build/probes/../probes/lttng-tracepoint-event-impl.h:142:6: error: conflicting types for ‘trace_hrtimer_start’
void trace_##_name(_proto);
^
/var/lib/dkms/lttng-modules/2.10.5/build/probes/../probes/lttng-tracepoint-event-impl.h:54:2: note: in expansion of macro ‘LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP’
LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args))
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/var/lib/dkms/lttng-modules/2.10.5/build/probes/../instrumentation/events/lttng-module/timer.h:163:1: note: in expansion of macro ‘LTTNG_TRACEPOINT_EVENT_MAP’
LTTNG_TRACEPOINT_EVENT_MAP(hrtimer_start,
^~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ./include/trace/events/timer.h:8:0,
from /var/lib/dkms/lttng-modules/2.10.5/build/probes/lttng-probe-timer.c:32:
./include/linux/tracepoint.h:184:21: note: previous definition of ‘trace_hrtimer_start’ was here
static inline void trace_##name(proto) \
^
./include/linux/tracepoint.h:349:2: note: in expansion of macro ‘__DECLARE_TRACE’
__DECLARE_TRACE(name, PARAMS(proto), PARAMS(args), \
^~~~~~~~~~~~~~~
./include/linux/tracepoint.h:485:2: note: in expansion of macro ‘DECLARE_TRACE’
DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
^~~~~~~~~~~~~
./include/trace/events/timer.h:191:1: note: in expansion of macro ‘TRACE_EVENT’
TRACE_EVENT(hrtimer_start,
^~~~~~~~~~~
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-context-tid.o
scripts/Makefile.build:332: recipe for target '/var/lib/dkms/lttng-modules/2.10.5/build/probes/lttng-probe-timer.o' failed
make[2]: *** [/var/lib/dkms/lttng-modules/2.10.5/build/probes/lttng-probe-timer.o] Error 1
make[2]: *** Waiting for unfinished jobs....
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-context-vtid.o
LD [M] /var/lib/dkms/lttng-modules/2.10.5/build/lib/lttng-lib-ring-buffer.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-context-ppid.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-context-vppid.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-context-cpu-id.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-context-interruptible.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-context-need-reschedule.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-calibrate.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/lttng-context-hostname.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/wrapper/random.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/probes/lttng.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/wrapper/trace-clock.o
CC [M] /var/lib/dkms/lttng-modules/2.10.5/build/wrapper/page_alloc.o
scripts/Makefile.build:581: recipe for target '/var/lib/dkms/lttng-modules/2.10.5/build/probes' failed
make[1]: *** [/var/lib/dkms/lttng-modules/2.10.5/build/probes] Error 2
make[1]: *** Waiting for unfinished jobs....
Makefile:1546: recipe for target '_module_/var/lib/dkms/lttng-modules/2.10.5/build' failed
make: *** [_module_/var/lib/dkms/lttng-modules/2.10.5/build] Error 2
make: Leaving directory '/usr/src/linux-headers-4.18.0-11-generic'
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: lttng-modules-dkms 2.10.5-1ubuntu1.1
ProcVersionSignature: User Name 4.18.0-11.12~18.04.1-generic 4.18.12
Uname: Linux 4.18.0-11-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.4
Architecture: amd64
Date: Fri Nov 9 04:29:19 2018
PackageArchitecture: all
SourcePackage: lttng-modules
UpgradeStatus: No upgrade log present (probably fresh install)
Same thing on AWS.
http://