doc: hook sphinx into build

configure.ac

@@ -1881,6 +1881,13 @@
         AC_DEFINE([CLS],[64],[L1 cache line size])
     fi
 
+# sphinx for documentation
+    AC_PATH_PROG(HAVE_SPHINXBUILD, sphinx-build, "no")
+    if test "$HAVE_SPHINXBUILD" = "no"; then
+       enable_sphinxbuild=no
+    fi
+    AM_CONDITIONAL([HAVE_SPHINXBUILD], [test "x$enable_sphinxbuild" != "xno"])
+
 # get revision
     if test -f ./revision; then
         REVISION=`cat ./revision`
@@ -1960,7 +1967,7 @@ AC_SUBST(CONFIGURE_PREFIX)
 AC_SUBST(CONFIGURE_SYSCONDIR)
 AC_SUBST(CONFIGURE_LOCALSTATEDIR)
 
-AC_OUTPUT(Makefile src/Makefile qa/Makefile qa/coccinelle/Makefile rules/Makefile doc/Makefile contrib/Makefile contrib/file_processor/Makefile contrib/file_processor/Action/Makefile contrib/file_processor/Processor/Makefile contrib/tile_pcie_logd/Makefile suricata.yaml scripts/Makefile scripts/suricatasc/Makefile scripts/suricatasc/suricatasc)
+AC_OUTPUT(Makefile src/Makefile qa/Makefile qa/coccinelle/Makefile rules/Makefile doc/Makefile doc/userguide/Makefile contrib/Makefile contrib/file_processor/Makefile contrib/file_processor/Action/Makefile contrib/file_processor/Processor/Makefile contrib/tile_pcie_logd/Makefile suricata.yaml scripts/Makefile scripts/suricatasc/Makefile scripts/suricatasc/suricatasc)
 
 SURICATA_BUILD_CONF="Suricata Configuration:
   AF_PACKET support:                       ${enable_af_packet}

doc/Makefile.am

@@ -1,3 +1,5 @@
+SUBDIRS = userguide
+
 EXTRA_DIST = \
 AUTHORS \
 GITGUIDE \

doc/userguide/.gitignore

@@ -0,0 +1 @@
+_build

doc/userguide/Makefile.am

@@ -0,0 +1,12 @@
+if HAVE_SPHINXBUILD
+man1_MANS = _build/man/suricata.1
+
+html:
+	$(MAKE) -f Makefile.sphinx html
+
+_build/man/suricata.1:
+	$(MAKE) -f Makefile.sphinx man
+
+clean-local:
+	rm -rf $(top_builddir)/doc/userguide/_build
+endif