[ircd-ratbox] two autoconf patches: don't use local libtdl unconditionally and add --with-rundir option

[Simon Bertrang]

Hi,
while porting ircd-ratbox i've adjusted the configure.ac script to
 1) use the libtdl the system has already installed
 2) accept a --with-rundir argument to specify where the pidfile is
    written to

Further i've noticed that you don't actually need the most recent
autoconf/automake versions, 2.62/1.9 work just fine over here, but
that's another story.

Attached you find two diffs against trunk.

Kind regards,
Simon
-------------- next part --------------
Index: configure.ac
===================================================================
--- configure.ac	(revision 26450)
+++ configure.ac	(working copy)
@@ -83,8 +83,18 @@ AC_PROG_LIBTOOL
 
 LIBTOOL="$LIBTOOL --silent"
 
-AC_CONFIG_SUBDIRS(libltdl libratbox)
+have_ltdl=no
 
+AC_CHECK_HEADER(ltdl.h, [
+	AC_CHECK_LIB(ltdl, lt_dlopen, have_ltdl=yes, have_ltdl=no)
+], have_ltdl=no)
+
+if test "$have_ltdl" = no; then
+	AC_CONFIG_SUBDIRS(libltdl)
+fi
+
+AC_CONFIG_SUBDIRS(libratbox)
+
 case "$host_os" in
 *cygwin*)
      AC_DEFINE_UNQUOTED(CYGWIN,1,[This is a Cygwin system])
-------------- next part --------------
Index: configure.ac
===================================================================
--- configure.ac	(revision 26450)
+++ configure.ac	(working copy)
@@ -357,6 +367,24 @@ AC_HELP_STRING([--with-logdir=DIR],
 		 AC_MSG_RESULT(no)
 	         AC_DEFINE_DIR(LOG_DIR, logdir, [Prefix where to write logfiles.])
 	  	 AC_SUBST_DIR([logdir])]
+)
+
+dnl **********************************************************************
+dnl Check for --with-rundir
+dnl **********************************************************************
+
+AC_MSG_CHECKING([whether to modify rundir])
+AC_ARG_WITH(rundir, 
+AC_HELP_STRING([--with-rundir=DIR],
+	       [Directory where to write runtime files.]),
+	       [ rundir=`echo $withval | sed 's/\/$//'`
+		 AC_MSG_RESULT(yes)
+		 AC_DEFINE_DIR(RUN_DIR, rundir, [Prefix where to write runtime files.])
+		 AC_SUBST_DIR([rundir]) ],
+	       [ rundir='${localstatedir}/run'
+		 AC_MSG_RESULT(no)
+	         AC_DEFINE_DIR(RUN_DIR, rundir, [Prefix where to write runtime files.])
+	  	 AC_SUBST_DIR([rundir])]
 )
 
 dnl **********************************************************************