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# -*- Autoconf -*-
AC_DEFUN([RUBY_PREPEND_OPTIONS],
[# RUBY_PREPEND_OPTIONS($1)
unset rb_opts; for rb_opt in $2; do
AS_CASE([" [$]{rb_opts} [$]{$1-} "],
[*" [$]{rb_opt} "*], [], [' '], [ $1="[$]{rb_opt}"], [ rb_opts="[$]{rb_opts}[$]{rb_opt} "])
done
$1="[$]{rb_opts}[$]$1"])dnl
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