* docs/MAIL.FILTERING: added note on removing procmail -f or

[mmh] / aclocal.m4

diff --git a/aclocal.m4 b/aclocal.m4
index 7dd6110..6091daa 100644 (file)
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -19,3 +19,120 @@ AC_DEFUN(AC_CHECK_NETLIBS,
 AC_CHECK_FUNC(socket, ,
   AC_CHECK_LIB(socket, socket))
 ])
 AC_CHECK_FUNC(socket, ,
   AC_CHECK_LIB(socket, socket))
 ])

+
+dnl --------------
+dnl CHECK FOR NDBM
+dnl --------------
+dnl
+dnl NMH_CHECK_DBM(include,library,action-if-found,action-if-not)
+
+dnl Check for presence of dbm_open() in the specified library
+dnl and with the specified include file (if libname is the empty
+dnl string then don't try to link against any particular library).
+
+dnl We set nmh_ndbm_found to 'yes' or 'no'; if found we set
+dnl nmh_ndbmheader to the first arg and nmh_ndbm to the second.
+
+dnl If this macro accepted a list of include,library tuples
+dnl to test in order that would be cleaner than the current
+dnl nest of calls in configure.in.
+
+dnl We try to link our own code fragment (which includes the
+dnl headers in the same way slocal.c does) rather than
+dnl using AC_CHECK_LIB because on later versions of libdb
+dnl the dbm_open() function is provided via a #define and
+dnl we don't want to hardcode searching for the internal
+dnl function that lies behind it. (AC_CHECK_LIB works by
+dnl defining its own bogus prototype rather than pulling in
+dnl the right header files.)
+
+dnl An oddity (bug) of this macro is that if you haven't
+dnl done AC_PROG_CC or something that implies it before
+dnl using this macro autoconf complains about a recursive
+dnl expansion.
+
+AC_DEFUN(NMH_CHECK_NDBM,
+[
+if test "x$2" = "x"; then
+  nmh_libs=
+  AC_MSG_CHECKING([for dbm in $1])
+else
+  nmh_libs="-l$2 "
+  AC_MSG_CHECKING([for dbm in $1 and $2])
+fi
+
+dnl We don't try to cache the result, because that exceeds
+dnl my autoconf skills -- feel free to put it in :-> -- PMM
+
+nmh_saved_libs="$LIBS"
+LIBS="$nmh_libs $5 $LIBS"
+AC_LINK_IFELSE(AC_LANG_PROGRAM([[
+#define DB_DBM_HSEARCH 1
+#include <$1>
+]],
+[[dbm_open("",0,0);]]),[nmh_ndbm_found=yes],[nmh_ndbm_found=no])
+LIBS="$nmh_saved_libs"
+
+if test "$nmh_ndbm_found" = "yes"; then
+  AC_MSG_RESULT(yes)
+  nmh_ndbmheader="$1"
+  nmh_ndbm="$2"
+  $3
+else
+  AC_MSG_RESULT(no)
+  $4
+  :
+fi
+])dnl
+
+dnl ----------------
+dnl CHECK FOR d_type
+dnl ----------------
+dnl
+dnl From Jim Meyering.
+dnl
+dnl Check whether struct dirent has a member named d_type.
+dnl
+
+# Copyright (C) 1997, 1999, 2000, 2001, 2002, 2003, 2004 Free Software
+# Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([CHECK_TYPE_STRUCT_DIRENT_D_TYPE],
+  [AC_REQUIRE([AC_HEADER_DIRENT])dnl
+   AC_CACHE_CHECK([for d_type member in directory struct],
+                  jm_cv_struct_dirent_d_type,
+     [AC_TRY_LINK(dnl
+       [
+#include <sys/types.h>
+#ifdef HAVE_DIRENT_H
+# include <dirent.h>
+#else /* not HAVE_DIRENT_H */
+# define dirent direct
+# ifdef HAVE_SYS_NDIR_H
+#  include <sys/ndir.h>
+# endif /* HAVE_SYS_NDIR_H */
+# ifdef HAVE_SYS_DIR_H
+#  include <sys/dir.h>
+# endif /* HAVE_SYS_DIR_H */
+# ifdef HAVE_NDIR_H
+#  include <ndir.h>
+# endif /* HAVE_NDIR_H */
+#endif /* HAVE_DIRENT_H */
+       ],
+       [struct dirent dp; dp.d_type = 0;],
+
+       jm_cv_struct_dirent_d_type=yes,
+       jm_cv_struct_dirent_d_type=no)
+     ]
+   )
+   if test $jm_cv_struct_dirent_d_type = yes; then
+     AC_DEFINE(HAVE_STRUCT_DIRENT_D_TYPE, 1,
+       [Define if there is a member named d_type in the struct describing
+        directory headers.])
+   fi
+  ]
+)