configure: Allow to disable man page building

Aparently there are distributions which come with incompatible docbook
implementations. On those, forced man page creating if required binaries
are found leads to build failure.

Allow them to conveniently disable man page output instead of having to
pass undocumented variables to configure.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/configure.ac b/configure.ac
index 83f5a061c643445da7434b3bba1f776e0f66aef9..71d30d885a6eb3f4edf6a3867e07eaa2fff3121c 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -29,6 +29,12 @@ AC_ARG_ENABLE([debug],
 AC_SUBST(with_debug)
 AM_CONDITIONAL([BUILD_DEBUG], [test "x$with_debug" != xno])
 
+AC_ARG_ENABLE([man-doc],
+             AS_HELP_STRING([--disable-man-doc], [Disable man page documentation]),
+             AS_IF([test "x$enable_man_doc" = "xno"], [enable_man_doc=no],
+             [enable_man_doc=yes]), [enable_man_doc=yes])
+AM_CONDITIONAL([BUILD_MAN], [test "x$enable_man_doc" == "xyes" ])
+
 AC_ARG_ENABLE([pdf-doc],
              AS_HELP_STRING([--enable-pdf-doc], [Enable PDF documentation]),
              AS_IF([test "x$enable_pdf_doc" = "xno"], [enable_pdf_doc=no],
@@ -59,18 +65,20 @@ fi
 AM_PROG_AR
 AM_PROG_LIBTOOL
 
-AC_CHECK_PROG(DOCBOOK2X_MAN, [docbook2x-man], [docbook2x-man], [no])
-AC_CHECK_PROG(DOCBOOK2MAN, [docbook2man], [docbook2man], [no])
-AC_CHECK_PROG(DB2X_DOCBOOK2MAN, [db2x_docbook2man], [db2x_docbook2man], [no])
-AS_IF([test "$DOCBOOK2X_MAN" != "no"], [DB2MAN="$DOCBOOK2X_MAN"],
-       [AS_IF([test "$DOCBOOK2MAN" != "no"], [DB2MAN="$DOCBOOK2MAN"],
-               [AS_IF([test "$DB2X_DOCBOOK2MAN" != "no"], [DB2MAN="$DB2X_DOCBOOK2MAN"],
-                       [AC_MSG_WARN([docbookx2-man/db2x_docbook2man not found, no manpages will be built])]
-               )]
-       )]
-)
-AC_SUBST(DB2MAN)
-AM_CONDITIONAL([BUILD_MAN], [test -n "$DB2MAN"])
+AM_COND_IF([BUILD_MAN], [
+       AC_CHECK_PROG(DOCBOOK2X_MAN, [docbook2x-man], [docbook2x-man], [no])
+       AC_CHECK_PROG(DOCBOOK2MAN, [docbook2man], [docbook2man], [no])
+       AC_CHECK_PROG(DB2X_DOCBOOK2MAN, [db2x_docbook2man], [db2x_docbook2man], [no])
+       AS_IF([test "$DOCBOOK2X_MAN" != "no"], [DB2MAN="$DOCBOOK2X_MAN"],
+             [AS_IF([test "$DOCBOOK2MAN" != "no"], [DB2MAN="$DOCBOOK2MAN"],
+                    [AS_IF([test "$DB2X_DOCBOOK2MAN" != "no"],
+                           [DB2MAN="$DB2X_DOCBOOK2MAN"],
+                           [AC_MSG_WARN([docbookx2-man/db2x_docbook2man not found, no manpages will be built])]
+                    )]
+            )]
+       )
+       AC_SUBST(DB2MAN)
+])
 
 AM_COND_IF([BUILD_PDF], [
        AC_CHECK_PROG(DBLATEX, [dblatex], [found], [no])
@@ -145,5 +153,6 @@ nft configuration:
   cli support:                 ${with_cli}
   enable debugging symbols:    ${with_debug}
   use mini-gmp:                        ${with_mini_gmp}
+  enable man page:              ${enable_man_doc}
   enable pdf documentation:    ${enable_pdf_doc}
   libxtables support:          ${with_libxtables}"