LU-1981 build: External OSD support in configure

[fs/lustre-release.git] / lustre / autoconf / lustre-core.m4

diff --git a/lustre/autoconf/lustre-core.m4 b/lustre/autoconf/lustre-core.m4
index 4701029..2a62497 100644 (file)
--- a/lustre/autoconf/lustre-core.m4
+++ b/lustre/autoconf/lustre-core.m4
@@ -2274,6 +2274,46 @@ LB_LINUX_TRY_COMPILE([
 ])
 
 #
+# LC_OSD_ADDON
+#
+# configure support for optional OSD implementation
+#
+AC_DEFUN([LC_OSD_ADDON],
+[AC_MSG_CHECKING([for osd])
+AC_ARG_WITH([osd],
+       AC_HELP_STRING([--with-osd=path],
+                       [set path to optional osd]),
+        [
+               case $with_osd in
+                       no)     ENABLEOSDADDON=0
+                               ;;
+                       *)      OSDADDON="${with_osd}"
+                               ENABLEOSDADDON=1
+                               ;;
+               esac
+       ], [
+               ENABLEOSDADDON=0
+       ])
+if test $ENABLEOSDADDON -eq 0; then
+       AC_MSG_RESULT([no])
+       OSDADDON=
+else
+       OSDMODNAME=`basename $OSDADDON`
+       if test -e $LUSTRE/$OSDMODNAME; then
+               AC_MSG_RESULT([can't link])
+               OSDADDON=
+       elif ln -s $OSDADDON $LUSTRE/$OSDMODNAME; then
+               AC_MSG_RESULT([$OSDMODNAME])
+               OSDADDON="subdir-m += $OSDMODNAME"
+       else
+               AC_MSG_RESULT([can't link])
+               OSDADDON=
+       fi
+fi
+AC_SUBST(OSDADDON)
+])
+
+#
 # LC_CONFIGURE
 #
 # other configure checks