share/mk/: build-pdf-book: Fix chapter bookmarks

So that they can be folded.

Suggested-by: Deri James <deri@chuzzlewit.myzen.co.uk>
Cc: "G. Branden Robinson" <branden@debian.org>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

diff --git a/share/mk/build/pdf/book/_.mk b/share/mk/build/pdf/book/_.mk
index ea7c081fd94ee6f55aa0ada6973cc3b59cdd546a..51d0a7d698ece209a9916a69ab5e0c11b77e3e10 100644 (file)
--- a/share/mk/build/pdf/book/_.mk
+++ b/share/mk/build/pdf/book/_.mk
@@ -38,7 +38,8 @@ $(_PDF_BOOK): $(_MANPAGES) $(_TINOS) $(MKBOOK) $(MK) | $$(@D)/
        | $(PIC) \
        | $(TBL) \
        | $(EQN) -Tpdf \
-       | $(TROFF) -mandoc -Tpdf -F$(_FONTSDIR) -dpaper=a4 -rC1 $(TROFFFLAGS) \
+       | $(TROFF) -mandoc -Tpdf -F$(_FONTSDIR) -dpaper=a4 -rC1 \
+               -ran*bookmark-base-level=1 $(TROFFFLAGS) \
        | $(GROPDF) -F$(_FONTSDIR) -pa4 $(GROPDFFLAGS) \
        | $(SPONGE) $@