lttng-ust: try to enable old API

* unfortunatelly this isn't enough and it still fails, so disable WEBOS_LTTNG_ENABLED
  until it's resolved

meta-webos/classes/webos_lttng.bbclass

@@ -14,7 +14,7 @@
 
 inherit webos_prerelease_dep
 WEBOS_LTTNG_ENABLED ??= "0"
-WEBOS_LTTNG_ENABLED ?= "${@ '0' if '${WEBOS_DISTRO_PRERELEASE}' == '' else '1' }"
+#WEBOS_LTTNG_ENABLED ?= "${@ '0' if '${WEBOS_DISTRO_PRERELEASE}' == '' else '1' }"
 # Only enable LTTng for target components
 WEBOS_LTTNG_ENABLED:class-native = "0"
 WEBOS_LTTNG_ENABLED:class-nativesdk = "0"

meta-webos/recipes-kernel/lttng/lttng-ust_%.bbappend

@@ -0,0 +1,18 @@
+# Copyright (c) 2021 LG Electronics, Inc.
+
+EXTENDPRAUTO:append = "webos1"
+
+# enable old API to fix http://gecko.lge.com/Builds/Details/672098
+# luna-surfacemanager, qtwayland-webos, qml-webos-components, audiod, webruntime, pmtrace are all failing like:
+# TOPDIR/BUILD/work/qemux86-webos-linux/luna-surfacemanager/2.0.0-358-r51/recipe-sysroot/usr/include/lttng/tracepoint-event.h:67:10: error: #include expects "FILENAME" or <FILENAME>
+#    67 | #include LTTNG_UST_TRACEPOINT_INCLUDE
+#       |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+# TOPDIR/BUILD/work/qemux86-webos-linux/pmtrace/1.0.0-9-r11/git/src/libmemtracker/liblttng-ust-mtrace-malloc/./ust_mtrace_malloc.h:41:9: error: static assertion failed: "Non-integer type `bt` not supported as element of LTTNG_UST_FIELD_ARRAY or LTTNG_UST_FIELD_SEQUENCE"
+#    41 |         ctf_sequence(void *, bt, bt, size_t, depth)
+#       |         ^~~~~~~~~~~~
+
+# TOPDIR/BUILD/work/qemux86-webos-linux/pmtrace/1.0.0-9-r11/git/src/libmemtracker/liblttng-ust-mtrace-malloc/./ust_mtrace_malloc.h:36:1: error: expected expression before ')' token
+#    36 | TRACEPOINT_EVENT(mtrace_malloc, malloc,
+#       | ^~~~~~~~~~~~~~~~
+CFLAGS += "-DLTTNG_UST_COMPAT_API_VERSION=0"