doc: do not discard pdflatex output

We need this information for debugging purpose when latex stop mode is
enabled (--enable-verbose-latex=yes).
Signed-off-by: Philippe Gerum <rpm@xenomai.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

configure.ac

@@ -447,7 +447,7 @@ LATEX_BATCHMODE=YES
 LATEX_MODE=batch
 AC_MSG_CHECKING(for LaTeX mode)
 AC_ARG_ENABLE(verbose-latex,
-	AS_HELP_STRING([--enable-nonstop-latex], [Use LaTeX non-stop mode]),
+	AS_HELP_STRING([--enable-verbose-latex], [Disable LaTeX non-stop mode]),
 	[case "$enableval" in
 	y | yes)
 	   LATEX_BATCHMODE=NO

doc/doxygen/Makefile.am

@@ -20,7 +20,7 @@ html/xeno3prm latex/xeno3prm: FORCE
 	$(DOXYGEN) $(@F)-$(@D).conf
 
 %.pdf: latex/%
-	$(MAKE) -C $< refman.pdf > /dev/null
+	$(MAKE) -C $< refman.pdf
 	mv $</refman.pdf $@
 
 distclean-local: