[PATCH v2] doc: add examples.dox path to STRIP_FROM_PATH

[Timothy Redaelli <tredaelli@redhat.com>]

examples.dox is built inside builddir/doc/api and so doxygen generates
some dir_HASH.html that includes the builddir name and this may prevent
DPDK documentation to be correctly generated in some distributions, for
example CentOS Stream 9 and RHEL9, since the builddir includes the
architecture.

This commit adds builddir/doc/api (the path where examples.dox is
generated) to STRIP_FROM_PATH, so the generated documentation doesn't
change if builddir changes.

Fixes: a6090630f4e5 ("doc: automate examples file list for API")
Cc: ferruh.yigit@intel.com
Cc: stable@dpdk.org
Signed-off-by: Timothy Redaelli <tredaelli@redhat.com>
---
v2:
 - Don't use another VARIABLE name, but set STRIP_FROM_PATH with the 2
   paths directly (suggested by David Marchand)
 - Strip the full path of examples.dox (except the last component)
   instead of stripping only build_root. This is needed since doxygen
   generates the HASH of dir_HASH.html filename using the last component
   of the path and so if the last part of buildroot is changed, the
   filename is different.
---
 doc/api/meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/api/meson.build b/doc/api/meson.build
index d34c383694..7e2b429ac8 100644
--- a/doc/api/meson.build
+++ b/doc/api/meson.build
@@ -36,7 +36,7 @@ cdata.set('API_EXAMPLES', join_paths(meson.build_root(), 'doc', 'api', 'examples
 cdata.set('OUTPUT', join_paths(meson.build_root(), 'doc', 'api'))
 cdata.set('HTML_OUTPUT', 'html')
 cdata.set('TOPDIR', meson.source_root())
-cdata.set('STRIP_FROM_PATH', meson.source_root())
+cdata.set('STRIP_FROM_PATH', ' '.join([meson.source_root(), join_paths(meson.build_root(), 'doc', 'api')]))
 cdata.set('WARN_AS_ERROR', 'NO')
 if get_option('werror')
     cdata.set('WARN_AS_ERROR', 'YES')
-- 
2.33.1