add comments

diff --git a/Makefile.maint b/Makefile.maint
index 77b5160..08f9cb8 100644 (file)
--- a/Makefile.maint
+++ b/Makefile.maint
@@ -126,6 +126,9 @@ sc_space_tab:
          { echo '$(ME): found SPACE-TAB sequence; remove the SPACE'    \
                1>&2; exit 1; } || :
 
+# Don't use atoi, atof, or atol in `real' code.
+# They provide no error checking mechanism.
+# Instead, use strto* functions.
 sc_prohibit_atoi_atof:
        @( cvsu --list ) > /dev/null 2>&1 || : &&                       \
          grep '\<ato[fil]\>'                                           \