build: doc: `make` generates requested documentation

Generate man pages, HTML, neither or both according to ./configure.
Based on the work done for libnetfilter_queue.

[ This patch updates the default ./configure option to build the
  manpages in case that doxygen is available. ]

Signed-off-by: Duncan Roe <duncan_roe@optusnet.com.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/autogen.sh b/autogen.sh
index 5e1344a..93e2a23 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -1,4 +1,12 @@
 #!/bin/sh -e
 
+BUILD_MAN=doxygen/build_man.sh
+
+# Allow to override build_man.sh url for local testing
+# E.g. export NFQ_URL=file:///usr/src/libnetfilter_queue
+curl ${NFQ_URL:-https://git.netfilter.org/libnetfilter_queue/plain}/$BUILD_MAN\
+  -o$BUILD_MAN
+chmod a+x $BUILD_MAN
+
 autoreconf -fi
 rm -Rf autom4te.cache