depends -sub CXX gcc &&

optional_depends pcre2 "" "--without-pcre2" "to use PCRE2" &&
if ! is_depends_enabled "${SPELL}" "pcre2"; then
  optional_depends -sub "REGEX" boost \
                                "--with-boost-regex" \
                                "--without-boost-regex" \
                                "to use Boost Regex library"
fi &&

optional_depends zlib "" "--without-zlib" "to use Zlib" &&

optional_depends bzip2 "" "--without-bzlib" "to use BZIP2" &&

optional_depends LZMA "" "--without-lzma" "to use LZMA" &&

optional_depends lz4 "" "--without-lz4" "to use LZ4" &&

optional_depends zstd "" "--without-zstd" "to use zstd"
