X-Git-Url: http://git.marmaro.de/?a=blobdiff_plain;f=configure.in;h=a60920a21aa2aeec6e4e6b347b25b63dd6a52db2;hb=7036a59145b61979bfd61344d55ac9ce36cc4d54;hp=7f4bd12e10dfe02ba1a4e529daf210ba207ae2a1;hpb=3a162432aa58eff6e48f99afaf746408905b008c;p=mmh

diff --git a/configure.in b/configure.in
index 7f4bd12..a60920a 100644
--- a/configure.in
+++ b/configure.in
@@ -256,6 +256,18 @@ dnl   AC_SUBST(LORDER)dnl
 dnl   AC_SUBST(TSORT)dnl
 fi
 
+dnl Check whether tsort can deal with loops
+AC_CACHE_CHECK(whether tsort can deal with loops, nmh_cv_tsort_loop,
+  [if test -z "`echo a b b a | tsort 2>/dev/null | grep a`" ; then
+    nmh_cv_tsort_loop=no
+  else
+    nmh_cv_tsort_loop=yes
+  fi])
+if test x$nmh_cv_tsort_loop = xno ; then
+  TSORT=cat
+  AC_SUBST(TSORT)dnl
+fi
+
 dnl Look for `ls'
 pathtmp=/usr/bin:/bin:/usr/local/bin:/usr/xpg4/bin:/usr/ucb
 AC_PATH_PROG(lspath, ls, no, [$pathtmp])
@@ -342,8 +354,25 @@ if test "$lspath" != "no" -a "$cutpath" != "no"; then
   fi])
 fi
 
-dnl ...If it's not, we need to #define MAILGROUP to 1 and make inc setgid.
-if test x"$nmh_cv_mailspool_world_writable" = x"no"; then
+dnl Also, check for liblockfile (as found on Debian systems)
+AC_CHECK_HEADER(lockfile.h, AC_CHECK_LIB(lockfile, lockfile_create) )
+
+dnl and whether its companion program dotlockfile is setgid
+AC_PATH_PROG(dotlockfilepath, dotlockfile, no)
+if test "$ac_cv_lib_lockfile_lockfile_create" != "no" ; then
+  if test "$ac_cv_path_dotlockfilepath" != "no" ; then
+    AC_CACHE_CHECK(whether dotlockfile is setgid, nmh_cv_dotlockfile_setgid,
+    [ if test -g "$ac_cv_path_dotlockfilepath" ; then
+        nmh_cv_dotlockfile_setgid=yes
+      else
+        nmh_cv_dotlockfile_setgid=no
+      fi])
+  fi
+fi
+
+dnl If mailspool is not world-writable and dotlockfile is not setgid,
+dnl we need to #define MAILGROUP to 1 and make inc setgid.
+if test x"$nmh_cv_mailspool_world_writable" = x"no" -a x"$nmh_cv_dotlockfile_setgid" != x"yes" ; then
   dnl do we really need both of these?
   AC_DEFINE(MAILGROUP)dnl
   SETGID_MAIL=1
@@ -470,9 +499,6 @@ for lib in $termcap_curses_order; do
 done
 AC_SUBST(TERMLIB)dnl
 
-dnl Check for liblockfile (as found on Debian systems)
-AC_CHECK_HEADER(lockfile.h, AC_CHECK_LIB(lockfile, maillock) )
-
 dnl --------------
 dnl CHECK FOR NDBM
 dnl --------------