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-rw-r--r--Makefile.in3
1 files changed, 2 insertions, 1 deletions
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 \