add note on variable names

[rrdtool-all.git] / program / acinclude.m4

diff --git a/program/acinclude.m4 b/program/acinclude.m4
index 6243c21182726a7dc07b3aace4579bcc30288f46..3cff28226989e6287a97b19fe7ec74249b6a7767 100644 (file)
--- a/program/acinclude.m4
+++ b/program/acinclude.m4
@@ -38,7 +38,7 @@ AC_DEFUN([EX_CHECK_ALL],
             dnl remove the cached value and test again
             unset ac_cv_lib_$1_$2
              AC_CHECK_LIB($1,$2,[
-                unset ac_cv_header_`echo $3 | sed  sed ['s/[^a-zA-Z0-9_]/_/g;s/^[0-9]/_/']`
+                unset ac_cv_header_`echo $3 | sed ['s/[^a-zA-Z0-9_]/_/g;s/^[0-9]/_/']`
                 AC_CHECK_HEADER($3,[EX_CHECK_STATE=YES],[])
             ],[])
           else