[PULL 6/6] trace: fix compilation with lttng-ust >= 2.13

[Thomas Huth]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

On Fedora 36, with lttng-ust 2.13.1, compilation fails with:

In file included from trace/trace-ust-all.h:49085,
                 from trace/trace-ust-all.c:13:
/usr/include/lttng/tracepoint-event.h:67:10: error: #include expects "FILENAME" 
or <FILENAME>
   67 | #include LTTNG_UST_TRACEPOINT_INCLUDE
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

In lttng-ust commit 41858e2b6e8 ("Fix: don't do macro expansion in
tracepoint file name") from 2012, starting from lttng-ust 2.1, the API
was changed to expect TRACEPOINT_INCLUDE to be defined as a string.

In lttng-ust commit d2966b4b0b2 ("Remove TRACEPOINT_INCLUDE_FILE
macro"), in 2021, the compatibility macro was removed.

Use the "new" API from 2012, and bump the version requirement to 2.1 to
fix compilation with >= 2.13.

According to repology, all distributions we support have >= 2.1 (centos
8 has oldest with 2.8.1 afaict)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20220328084717.367993-2-marcandre.lureau@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 meson.build                              | 4 ++--
 scripts/tracetool/format/ust_events_h.py | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/meson.build b/meson.build
index 04ce33fef1..861de93c4f 100644
--- a/meson.build
+++ b/meson.build
@@ -455,8 +455,8 @@ if 'CONFIG_GIO' in config_host
 endif
 lttng = not_found
 if 'ust' in get_option('trace_backends')
-  lttng = dependency('lttng-ust', required: true, method: 'pkg-config',
-                     kwargs: static_kwargs)
+  lttng = dependency('lttng-ust', required: true, version: '>= 2.1',
+                     method: 'pkg-config', kwargs: static_kwargs)
 endif
 pixman = not_found
 if have_system or have_tools
diff --git a/scripts/tracetool/format/ust_events_h.py 
b/scripts/tracetool/format/ust_events_h.py
index 6ce559f6cc..b99fe6896b 100644
--- a/scripts/tracetool/format/ust_events_h.py
+++ b/scripts/tracetool/format/ust_events_h.py
@@ -29,8 +29,8 @@ def generate(events, backend, group):
         '#undef TRACEPOINT_PROVIDER',
         '#define TRACEPOINT_PROVIDER qemu',
         '',
-        '#undef TRACEPOINT_INCLUDE_FILE',
-        '#define TRACEPOINT_INCLUDE_FILE ./%s' % include,
+        '#undef TRACEPOINT_INCLUDE',
+        '#define TRACEPOINT_INCLUDE "./%s"' % include,
         '',
         '#if !defined (TRACE_%s_GENERATED_UST_H) || \\'  % group.upper(),
         '     defined(TRACEPOINT_HEADER_MULTI_READ)',
-- 
2.27.0