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.
# 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
apidoc: doc/doxy/html
documentation: $(DOCS)
-TEXIDEP = awk '/^@(verbatim)?include/ { printf "$@: $(@D)/%s\n", $$2 }' <$< >$(@:%=%.d)
+TEXIDEP = perl $(SRC_PATH)/doc/texidep.pl $< $@ >$(@:%=%.d)
doc/%.txt: TAG = TXT
doc/%.txt: doc/%.texi
--- /dev/null
+#! /usr/bin/perl
+
+use warnings;
+use strict;
+
+my ($root, $target) = @ARGV;
+
+sub print_deps {
+ my ($file, $deps) = @_;
+ $deps->{$file} = 1;
+
+ open(my $fh, "$file") or die "Cannot open file '$file': $!";
+ while (<$fh>) {
+ /^@(?:verbatim)?include\s+(\S+)/ and do {
+ die "Circular dependency found in file $root\n" if exists $deps->{"doc/$1"};
+ print "$target: doc/$1\n";
+ print_deps("doc/$1", {%$deps});
+ }
+ }
+}
+
+print_deps($root, {});