From 391e5df571e8f5bcef3ee0cd227002056cbcbe5c Mon Sep 17 00:00:00 2001
From: akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Tue, 13 Oct 2009 11:43:01 +0000
Subject: add comment.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@25323 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 Makefile.in | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Makefile.in b/Makefile.in
index 5ba6f07520..4218ffecc1 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -189,10 +189,11 @@ incs: id.h
 
 # Things which should be considered:
 # * with gperf v.s. without gperf
+# * committers may have various versions of gperf
 # * ./configure v.s. ../ruby/configure
 # * GNU make v.s. HP-UX make	# HP-UX make invokes the action if lex.c and keywords has same mtime.
 # * svn checkout generate a file with mtime as current time
-# * XFS has a mtime with fractional part
+# * ext4 and XFS has a mtime with fractional part
 lex.c: defs/keywords
 	@\
 	if cmp -s $(srcdir)/defs/lex.c.src $?; then \
-- 
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