pd-lua external/Makefile changes.

pd-lua now uses the latest pd-lib-builder and includes lua as a
submodule, so building it becomes a lot easier. Most notably, Lua 5.4 is
linked statically from lua/onelua.c, so Lua isn't needed as a build or
runtime dependency any more and the resulting external will use exactly
the same Lua version across different platforms.

Author: agraef

externals/Makefile

@@ -1484,11 +1484,8 @@ pddp_clean:
 #------------------------------------------------------------------------------#
 # PDLUA
 
-LUA_CFLAGS = $(shell (pkg-config --cflags lua5.4 || pkg-config --cflags lua5.3 || pkg-config --cflags lua5.2 || pkg-config --cflags lua) 2> /dev/null)
-LUA_LIBS = $(shell (pkg-config --libs lua5.4 || pkg-config --libs lua5.3 || pkg-config --libs lua5.2 || pkg-config --libs lua) 2> /dev/null)
-
 pdlua:
-	make -C $(externals_src)/pd-lua LUA_CFLAGS="$(LUA_CFLAGS)" LUA_LIBS="$(LUA_LIBS)" PD_PATH="$(pd_src)" PD_LIB="$(pd_src)/src" CFLAGS="$(CFLAGS)"
+	make -C $(externals_src)/pd-lua PDINCLUDEDIR="$(pd_src)/src" PDBINDIR="$(pd_src)/src"
 
 pdlua_install:
 	make -C $(externals_src)/pd-lua DESTDIR="$(DESTDIR)" objectsdir="$(objectsdir)" install