add jm_ prefix to cache variable

diff --git a/m4/jm-mktime.m4 b/m4/jm-mktime.m4
index d765bbb..af36117 100644 (file)
--- a/m4/jm-mktime.m4
+++ b/m4/jm-mktime.m4
@@ -12,7 +12,7 @@ AC_DEFUN(jm_FUNC_MKTIME,
  dnl mktime.c uses localtime_r if it exists.  Check for it.
  AC_CHECK_FUNCS(localtime_r)
 
- if test $am_cv_func_working_mktime = no; then
+ if test $jm_am_cv_func_working_mktime = no; then
    AC_DEFINE_UNQUOTED(mktime, rpl_mktime)
  fi
 ])