[PATCH] libtool.m4: handle "undefined" from `getconf`

[Mike Frysinger]

If a getconf value doesn't have a limit, getconf will display
"undefined". The libtool code though gets confused by this, so
handle that specifically.

Signed-off-by: Mike Frysinger <address@hidden>

* m4/libtool.m4: Check for "undefined" from `getconf`.
---
 m4/libtool.m4 |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/m4/libtool.m4 b/m4/libtool.m4
index 75bfdb4..a8ecbc3 100644
--- a/m4/libtool.m4
+++ b/m4/libtool.m4
@@ -1692,7 +1692,8 @@ AC_CACHE_VAL([lt_cv_sys_max_cmd_len], [dnl
     ;;
   *)
     lt_cv_sys_max_cmd_len=`(getconf ARG_MAX) 2> /dev/null`
-    if test -n "$lt_cv_sys_max_cmd_len"; then
+    if test -n "$lt_cv_sys_max_cmd_len" && \
+       test undefined != "$lt_cv_sys_max_cmd_len"; then
       lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4`
       lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3`
     else
-- 
1.7.8.5