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-rw-r--r--tool/m4/ruby_check_builtin_setjmp.m42
1 files changed, 1 insertions, 1 deletions
diff --git a/tool/m4/ruby_check_builtin_setjmp.m4 b/tool/m4/ruby_check_builtin_setjmp.m4
index 008fd45911..05118e2243 100644
--- a/tool/m4/ruby_check_builtin_setjmp.m4
+++ b/tool/m4/ruby_check_builtin_setjmp.m4
@@ -1,4 +1,4 @@
-# -*- Autoconf -*-
+dnl -*- Autoconf -*-
AC_DEFUN([RUBY_CHECK_BUILTIN_SETJMP], [
AS_IF([test x"${ac_cv_func___builtin_setjmp}" = xyes], [
unset ac_cv_func___builtin_setjmp