From: Jason A. Donenfeld <Jason@zx2c4.com>
Date: Tue, 14 Jan 2014 00:50:31 +0000 (+0100)
Subject: makefile: auto-detect presence of various Lua, bsd
X-Git-Url: https://gitweb.ps.run/ps-cgit/commitdiff_plain/3488d124052f5c3ddef303ed5306ad6a458794c1?ds=inline;hp=3488d124052f5c3ddef303ed5306ad6a458794c1

makefile: auto-detect presence of various Lua, bsd

We favor LuaJIT over Lua. We disable Lua if neither can be found. We
error out if a particular Lua is specified via LUA_IMPLEMENTATION=JIT or
LUA_IMPLEMENTATION=VANILLA, but cannot be found. We print a status
message depending on what happens.

Also, we do not link against libdl on the BSDs, since they include it as
part of libc.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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