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-rw-r--r--tool/m4/ruby_check_setjmp.m41
1 files changed, 1 insertions, 0 deletions
diff --git a/tool/m4/ruby_check_setjmp.m4 b/tool/m4/ruby_check_setjmp.m4
index 7f3b7e3fdf..59f38581b8 100644
--- a/tool/m4/ruby_check_setjmp.m4
+++ b/tool/m4/ruby_check_setjmp.m4
@@ -1,3 +1,4 @@
+# -*- Autoconf -*-
# used for AC_ARG_WITH(setjmp-type)
AC_DEFUN([RUBY_CHECK_SETJMP], [
AC_CACHE_CHECK([for ]$1[ as a macro or function], ac_cv_func_$1,