doc: add script to compute texi files dependencies

Replace the inline awk script with a Perl script which tracks the
dependencies recursively.

This allows to correctly track dependencies for files including files
with a second level include (for example: ffmpeg-devices.texi ->
devices.texi -> outdevs.texi).

This also adds a dependency on perl for computing the dependencies, which
should not be a problem since perl is already required all the way for
building documentation.

This is a variant of commit 628ceac6526724d35cb390cc1f88344f4ea22eb4
which was reverted due to out-of-tree build failure.

1 files changed, 2 insertions, 2 deletions

diff --git a/configure b/configure
index 9c8fc972fa..205cfc96b3 100755
--- a/configure
+++ b/configure
@@ -2337,8 +2337,8 @@ ffserver_extralibs='$ldl'
 # documentation
 podpages_deps="perl"
 manpages_deps="perl pod2man"
-htmlpages_deps="texi2html"
-txtpages_deps="makeinfo"
+htmlpages_deps="perl texi2html"
+txtpages_deps="perl makeinfo"
 doc_deps_any="manpages htmlpages podpages txtpages"
 
 # default parameters