PolarDB-for-PostgreSQL

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#! /bin/sh
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# config/missing
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# This is *not* the GNU `missing' script, although it is similar in
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# concept. You can call it from the makefiles to get consistent
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# behavior when certain utility programs are missing.
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case $1 in
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    flex|bison)
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        # `missing flex|bison <input> <output>'
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        input=$2
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        output=$3
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        if test -f "$output"; then
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            echo "\
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***
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WARNING: \`$1' is missing on your system. You should only need it
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if you changed the file \`$input'; these changes will not take effect.
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You can get $1 from a GNU mirror site.
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***" >&2
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            echo "touch $output"
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            touch "$output"
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            exit 0
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        else # ! test -f $output
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            echo "\
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***
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ERROR: \`$1' is missing on your system. It is needed to create the
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file \`$output'. You can either get $1 from a GNU mirror site
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or download an official distribution of PostgreSQL, which contains
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pre-packaged $1 output.
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***" >&2
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            exit 1
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        fi
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        ;;
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    perl)
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        # `missing perl'
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        echo "\
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***
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ERROR: Perl is missing on your system. It is needed unless you are building
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from an unmodified official distribution of PostgreSQL.
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***" >&2
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        exit 1
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        ;;
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    *)
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        # `missing something-or-other'
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        echo "\
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***
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ERROR: \`$1' is missing on your system.
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***" >&2
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        exit 1
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        ;;
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esac
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