test: v4l2_compat: Disable test when ASan is enabled

The V4L2 compat test runs v4l2-ctl and v4l2-compliance with
v4l2-compat.so preloaded. If libcamera is compiled with the address
sanitizer enabled, the ASan library will be loaded due to preloading
v4l2-compat.so. This however doesn't occur early enough in the dynamic
linking process due to the v4l2 executables not being themselves linked
to the ASan runtime, which causes ASan to abort with

==2198==ASan runtime does not come first in initial library list; you should either link runtime to your application or manually preload it with LD_PRELOAD.

Using LD_PRELOAD to load the ASan runtime would fix this issue, but it
requires knowing the absolute path to the ASan shared object. This is
compiler-dependent and for clang, architecture-dependent as well.

Until we figure out how to safely retrieve that information, disable the
test when ASan is enabled as a quick fix.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>

test/v4l2_compat/meson.build

@@ -1,5 +1,15 @@
 # SPDX-License-Identifier: CC0-1.0
 
+# If ASan is enabled, the link order runtime check will fail as v4l2-ctl and
+# v4l2-compliance are not linked to ASan. Skip the test in that case.
+#
+# TODO: Find a way to LD_PRELOAD the ASan dynamic library instead, in a
+# cross-platform way with support for both gcc and clang.
+
+if get_option('b_sanitize').contains('address')
+    subdir_done()
+endif
+
 if is_variable('v4l2_compat')
     v4l2_compat_test = files('v4l2_compat_test.py')