Documentation: Fix INCLUDE_PATH doxygen configuration option

libcamera header files should be included using the `libcamera/...` prefix.
However, `INCLUDE_PATH` is currently set to `@TOP_SRCDIR@/include/libcamera`
meaning that doxygen, when encountering `libcamera/x.h`, will try to open
`@TOP_SRCDIR@/include/libcamera/libcamera/x.h`, which is not the correct
path.

Fix that by using `@TOP_{BUILD,SRC}DIR@/include`. This removes the extra
`libcamera` component from the path and adds the corresponding directory
from the build directory as well since that is an implicit include
directory added by meson.

Signed-off-by: Barnabás Pőcze <[email protected]>
Reviewed-by: Kieran Bingham <[email protected]>
Reviewed-by: Laurent Pinchart <[email protected]>
Signed-off-by: Kieran Bingham <[email protected]>

Author: Barnabás Pőcze

Documentation/Doxyfile-common.in

@@ -57,7 +57,8 @@ GENERATE_LATEX         = NO
 MACRO_EXPANSION        = YES
 EXPAND_ONLY_PREDEF     = YES
 
-INCLUDE_PATH           = "@TOP_SRCDIR@/include/libcamera"
+INCLUDE_PATH           = "@TOP_BUILDDIR@/include" \
+                         "@TOP_SRCDIR@/include"
 INCLUDE_FILE_PATTERNS  = *.h
 
 IMAGE_PATH             = "@TOP_SRCDIR@/Documentation/images"