meson: Fix check for crypt(3) to improve OpenBSD support #956
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OpenBSDでmesonを実行すると
crypt(3)
でエラーになると報告がありました。mesonはlibcryptライブラリを探しますがOpenBSDのcrypt関数は実体がlibcにあるためチェック漏れしていたようです。
そのためライブラリが見つからないときは直接crypt関数を探すように修正します。
修正にあたり不具合報告をしていただきありがとうございました。
https://mevius.5ch.net/test/read.cgi/unix/1568040383/740