diff -ur lua-5.3.4/Makefile lua-5.3.4-rrt/Makefile
--- lua-5.3.4/Makefile	2016-12-20 16:26:08.000000000 +0000
+++ lua-5.3.4-rrt/Makefile	2017-03-20 11:58:21.367173501 +0000
@@ -3,6 +3,8 @@
 
 # == CHANGE THE SETTINGS BELOW TO SUIT YOUR ENVIRONMENT =======================
 
+DEB_HOST_MULTIARCH ?= $(shell dpkg-architecture -qDEB_HOST_MULTIARCH)
+
 # Your platform. See PLATS for possible values.
 PLAT= none
 
@@ -11,16 +13,16 @@
 # You may want to make INSTALL_LMOD and INSTALL_CMOD consistent with
 # LUA_ROOT, LUA_LDIR, and LUA_CDIR in luaconf.h.
 INSTALL_TOP= /usr/local
-INSTALL_BIN= $(INSTALL_TOP)/bin
-INSTALL_INC= $(INSTALL_TOP)/include
-INSTALL_LIB= $(INSTALL_TOP)/lib
-INSTALL_MAN= $(INSTALL_TOP)/man/man1
-INSTALL_LMOD= $(INSTALL_TOP)/share/lua/$V
-INSTALL_CMOD= $(INSTALL_TOP)/lib/lua/$V
+INSTALL_BIN= $(INSTALL_TOP)/bin/$(DEB_HOST_MULTIARCH)
+INSTALL_INC= $(INSTALL_TOP)/include/lua$(V)
+INSTALL_LIB= $(INSTALL_TOP)/lib/$(DEB_HOST_MULTIARCH)
+INSTALL_MAN= $(INSTALL_TOP)/share/man/man1
+INSTALL_LMOD= $(INSTALL_TOP)/share/lua/$(V)
+INSTALL_CMOD= $(INSTALL_TOP)/lib/$(DEB_HOST_MULTIARCH)/lua/$(V)
 
 # How to install. If your install program does not support "-p", then
 # you may have to run ranlib on the installed liblua.a.
-INSTALL= install -p
+INSTALL= libtool --mode=install install -p
 INSTALL_EXEC= $(INSTALL) -m 0755
 INSTALL_DATA= $(INSTALL) -m 0644
 #
@@ -39,9 +41,9 @@
 PLATS= aix bsd c89 freebsd generic linux macosx mingw posix solaris
 
 # What to install.
-TO_BIN= lua luac
+TO_BIN= lua$(V) luac$(V)
 TO_INC= lua.h luaconf.h lualib.h lauxlib.h lua.hpp
-TO_LIB= liblua.a
+TO_LIB= liblua$(V).la
 TO_MAN= lua.1 luac.1
 
 # Lua version and release.
@@ -52,10 +54,10 @@
 all:	$(PLAT)
 
 $(PLATS) clean:
-	cd src && $(MAKE) $@
+	cd src && $(MAKE) $@ INSTALL_LIB=$(INSTALL_LIB) DEB_HOST_MULTIARCH=$(DEB_HOST_MULTIARCH)
 
 test:	dummy
-	src/lua -v
+	-src/lua$(V) -v
 
 install: dummy
 	cd src && $(MKDIR) $(INSTALL_BIN) $(INSTALL_INC) $(INSTALL_LIB) $(INSTALL_MAN) $(INSTALL_LMOD) $(INSTALL_CMOD)
diff -ur lua-5.3.4/src/luaconf.h lua-5.3.4-rrt/src/luaconf.h
--- lua-5.3.4/src/luaconf.h	2016-12-22 13:08:50.000000000 +0000
+++ lua-5.3.4-rrt/src/luaconf.h	2017-03-20 11:58:21.367173501 +0000
@@ -201,14 +201,20 @@
 #else			/* }{ */
 
 #define LUA_ROOT	"/usr/local/"
+#define LUA_ROOT2	"/usr/"
 #define LUA_LDIR	LUA_ROOT "share/lua/" LUA_VDIR "/"
-#define LUA_CDIR	LUA_ROOT "lib/lua/" LUA_VDIR "/"
+#define LUA_LDIR2	LUA_ROOT2 "share/lua/" LUA_VDIR
+#define LUA_CDIR	LUA_ROOT "lib/" DEB_HOST_MULTIARCH "/lua/" LUA_VDIR
+#define LUA_CDIR2	LUA_ROOT2 "lib/" DEB_HOST_MULTIARCH "/lua/" LUA_VDIR
+#define LUA_CDIR3	LUA_ROOT2 "lib/lua/" LUA_VDIR
 #define LUA_PATH_DEFAULT  \
 		LUA_LDIR"?.lua;"  LUA_LDIR"?/init.lua;" \
 		LUA_CDIR"?.lua;"  LUA_CDIR"?/init.lua;" \
-		"./?.lua;" "./?/init.lua"
+		LUA_LDIR2"?.lua;"  LUA_LDIR2"?/init.lua;" "./?.lua;" "./?/init.lua"
 #define LUA_CPATH_DEFAULT \
-		LUA_CDIR"?.so;" LUA_CDIR"loadall.so;" "./?.so"
+		LUA_CDIR"?.so;" LUA_CDIR"loadall.so;" \
+		LUA_CDIR2"?.so;"  LUA_CDIR2"loadall.so;" \
+		LUA_CDIR3"?.so;"  LUA_CDIR3"loadall.so;" "./?.so"
 #endif			/* } */
 
 
Only in lua-5.3.4-rrt/src: luaconf.h.orig
diff -ur lua-5.3.4/src/Makefile lua-5.3.4-rrt/src/Makefile
--- lua-5.3.4/src/Makefile	2015-05-27 12:10:11.000000000 +0100
+++ lua-5.3.4-rrt/src/Makefile	2017-03-20 11:58:21.367173501 +0000
@@ -6,8 +6,10 @@
 # Your platform. See PLATS for possible values.
 PLAT= none
 
-CC= gcc -std=gnu99
-CFLAGS= -O2 -Wall -Wextra -DLUA_COMPAT_5_2 $(SYSCFLAGS) $(MYCFLAGS)
+V=5.3
+CC= libtool --mode=compile --tag=CC gcc -std=gnu99
+LD= libtool --mode=link --tag=CC gcc
+CFLAGS= -O2 -Wall -DLUA_COMPAT_5_2 -DDEB_HOST_MULTIARCH='"$(DEB_HOST_MULTIARCH)"' $(SYSCFLAGS) $(MYCFLAGS)
 LDFLAGS= $(SYSLDFLAGS) $(MYLDFLAGS)
 LIBS= -lm $(SYSLIBS) $(MYLIBS)
 
@@ -28,19 +30,19 @@
 
 PLATS= aix bsd c89 freebsd generic linux macosx mingw posix solaris
 
-LUA_A=	liblua.a
-CORE_O=	lapi.o lcode.o lctype.o ldebug.o ldo.o ldump.o lfunc.o lgc.o llex.o \
-	lmem.o lobject.o lopcodes.o lparser.o lstate.o lstring.o ltable.o \
-	ltm.o lundump.o lvm.o lzio.o
-LIB_O=	lauxlib.o lbaselib.o lbitlib.o lcorolib.o ldblib.o liolib.o \
-	lmathlib.o loslib.o lstrlib.o ltablib.o lutf8lib.o loadlib.o linit.o
+LUA_A=	liblua$(V).la
+CORE_O=	lapi.lo lcode.lo lctype.lo ldebug.lo ldo.lo ldump.lo lfunc.lo lgc.lo llex.lo \
+	lmem.lo lobject.lo lopcodes.lo lparser.lo lstate.lo lstring.lo ltable.lo \
+	ltm.lo lundump.lo lvm.lo lzio.lo
+LIB_O=	lauxlib.lo lbaselib.lo lbitlib.lo lcorolib.lo ldblib.lo liolib.lo \
+	lmathlib.lo loslib.lo lstrlib.lo ltablib.lo lutf8lib.lo loadlib.lo linit.lo
 BASE_O= $(CORE_O) $(LIB_O) $(MYOBJS)
 
-LUA_T=	lua
-LUA_O=	lua.o
+LUA_T=	lua$(V)
+LUA_O=	lua.lo
 
-LUAC_T=	luac
-LUAC_O=	luac.o
+LUAC_T=	luac$(V)
+LUAC_O=	luac.lo
 
 ALL_O= $(BASE_O) $(LUA_O) $(LUAC_O)
 ALL_T= $(LUA_A) $(LUA_T) $(LUAC_T)
@@ -58,12 +60,13 @@
 $(LUA_A): $(BASE_O)
 	$(AR) $@ $(BASE_O)
 	$(RANLIB) $@
+	$(LD) -o $@ -version-info 0:0:0 -rpath $(INSTALL_LIB) $(BASE_O) -lm -ldl
 
 $(LUA_T): $(LUA_O) $(LUA_A)
-	$(CC) -o $@ $(LDFLAGS) $(LUA_O) $(LUA_A) $(LIBS)
+	$(LD) -o $@ $(LDFLAGS) -static -Wl,-E lua.o $(LUA_A) $(LIBS)
 
 $(LUAC_T): $(LUAC_O) $(LUA_A)
-	$(CC) -o $@ $(LDFLAGS) $(LUAC_O) $(LUA_A) $(LIBS)
+	$(LD) -o $@ $(LDFLAGS) -static luac.o lundump.o lopcodes.o $(LUA_A) -lm -ldl
 
 clean:
 	$(RM) $(ALL_T) $(ALL_O)
@@ -129,69 +132,74 @@
 
 # DO NOT DELETE
 
-lapi.o: lapi.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \
+%.lo:%.c
+	$(CC) $(CFLAGS) -c $<
+
+
+
+lapi.lo: lapi.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \
  lobject.h ltm.h lzio.h lmem.h ldebug.h ldo.h lfunc.h lgc.h lstring.h \
  ltable.h lundump.h lvm.h
-lauxlib.o: lauxlib.c lprefix.h lua.h luaconf.h lauxlib.h
-lbaselib.o: lbaselib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
-lbitlib.o: lbitlib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
-lcode.o: lcode.c lprefix.h lua.h luaconf.h lcode.h llex.h lobject.h \
+lauxlib.lo: lauxlib.c lprefix.h lua.h luaconf.h lauxlib.h
+lbaselib.lo: lbaselib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
+lbitlib.lo: lbitlib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
+lcode.lo: lcode.c lprefix.h lua.h luaconf.h lcode.h llex.h lobject.h \
  llimits.h lzio.h lmem.h lopcodes.h lparser.h ldebug.h lstate.h ltm.h \
  ldo.h lgc.h lstring.h ltable.h lvm.h
-lcorolib.o: lcorolib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
-lctype.o: lctype.c lprefix.h lctype.h lua.h luaconf.h llimits.h
-ldblib.o: ldblib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
-ldebug.o: ldebug.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \
+lcorolib.lo: lcorolib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
+lctype.lo: lctype.c lprefix.h lctype.h lua.h luaconf.h llimits.h
+ldblib.lo: ldblib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
+ldebug.lo: ldebug.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \
  lobject.h ltm.h lzio.h lmem.h lcode.h llex.h lopcodes.h lparser.h \
  ldebug.h ldo.h lfunc.h lstring.h lgc.h ltable.h lvm.h
-ldo.o: ldo.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \
+ldo.lo: ldo.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \
  lobject.h ltm.h lzio.h lmem.h ldebug.h ldo.h lfunc.h lgc.h lopcodes.h \
  lparser.h lstring.h ltable.h lundump.h lvm.h
-ldump.o: ldump.c lprefix.h lua.h luaconf.h lobject.h llimits.h lstate.h \
+ldump.lo: ldump.c lprefix.h lua.h luaconf.h lobject.h llimits.h lstate.h \
  ltm.h lzio.h lmem.h lundump.h
-lfunc.o: lfunc.c lprefix.h lua.h luaconf.h lfunc.h lobject.h llimits.h \
+lfunc.lo: lfunc.c lprefix.h lua.h luaconf.h lfunc.h lobject.h llimits.h \
  lgc.h lstate.h ltm.h lzio.h lmem.h
-lgc.o: lgc.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \
+lgc.lo: lgc.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \
  llimits.h ltm.h lzio.h lmem.h ldo.h lfunc.h lgc.h lstring.h ltable.h
-linit.o: linit.c lprefix.h lua.h luaconf.h lualib.h lauxlib.h
-liolib.o: liolib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
-llex.o: llex.c lprefix.h lua.h luaconf.h lctype.h llimits.h ldebug.h \
- lstate.h lobject.h ltm.h lzio.h lmem.h ldo.h lgc.h llex.h lparser.h \
- lstring.h ltable.h
-lmathlib.o: lmathlib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
-lmem.o: lmem.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \
+linit.lo: linit.c lprefix.h lua.h luaconf.h lualib.h lauxlib.h
+liolib.lo: liolib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
+llex.lo: llex.c lprefix.h lua.h luaconf.h lctype.h llimits.h ldo.h \
+ lobject.h lstate.h ltm.h lzio.h lmem.h lgc.h llex.h lparser.h lstring.h \
+ ltable.h
+lmathlib.lo: lmathlib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
+lmem.lo: lmem.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \
  llimits.h ltm.h lzio.h lmem.h ldo.h lgc.h
-loadlib.o: loadlib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
-lobject.o: lobject.c lprefix.h lua.h luaconf.h lctype.h llimits.h \
+loadlib.lo: loadlib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
+lobject.lo: lobject.c lprefix.h lua.h luaconf.h lctype.h llimits.h \
  ldebug.h lstate.h lobject.h ltm.h lzio.h lmem.h ldo.h lstring.h lgc.h \
  lvm.h
-lopcodes.o: lopcodes.c lprefix.h lopcodes.h llimits.h lua.h luaconf.h
-loslib.o: loslib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
-lparser.o: lparser.c lprefix.h lua.h luaconf.h lcode.h llex.h lobject.h \
+lopcodes.lo: lopcodes.c lprefix.h lopcodes.h llimits.h lua.h luaconf.h
+loslib.lo: loslib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
+lparser.lo: lparser.c lprefix.h lua.h luaconf.h lcode.h llex.h lobject.h \
  llimits.h lzio.h lmem.h lopcodes.h lparser.h ldebug.h lstate.h ltm.h \
  ldo.h lfunc.h lstring.h lgc.h ltable.h
-lstate.o: lstate.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \
+lstate.lo: lstate.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \
  lobject.h ltm.h lzio.h lmem.h ldebug.h ldo.h lfunc.h lgc.h llex.h \
  lstring.h ltable.h
-lstring.o: lstring.c lprefix.h lua.h luaconf.h ldebug.h lstate.h \
+lstring.lo: lstring.c lprefix.h lua.h luaconf.h ldebug.h lstate.h \
  lobject.h llimits.h ltm.h lzio.h lmem.h ldo.h lstring.h lgc.h
-lstrlib.o: lstrlib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
-ltable.o: ltable.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \
+lstrlib.lo: lstrlib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
+ltable.lo: ltable.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \
  llimits.h ltm.h lzio.h lmem.h ldo.h lgc.h lstring.h ltable.h lvm.h
-ltablib.o: ltablib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
-ltm.o: ltm.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \
+ltablib.lo: ltablib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
+ltm.lo: ltm.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \
  llimits.h ltm.h lzio.h lmem.h ldo.h lstring.h lgc.h ltable.h lvm.h
-lua.o: lua.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
-luac.o: luac.c lprefix.h lua.h luaconf.h lauxlib.h lobject.h llimits.h \
+lua.lo: lua.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
+luac.lo: luac.c lprefix.h lua.h luaconf.h lauxlib.h lobject.h llimits.h \
  lstate.h ltm.h lzio.h lmem.h lundump.h ldebug.h lopcodes.h
-lundump.o: lundump.c lprefix.h lua.h luaconf.h ldebug.h lstate.h \
+lundump.lo: lundump.c lprefix.h lua.h luaconf.h ldebug.h lstate.h \
  lobject.h llimits.h ltm.h lzio.h lmem.h ldo.h lfunc.h lstring.h lgc.h \
  lundump.h
-lutf8lib.o: lutf8lib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
-lvm.o: lvm.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \
+lutf8lib.lo: lutf8lib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
+lvm.lo: lvm.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \
  llimits.h ltm.h lzio.h lmem.h ldo.h lfunc.h lgc.h lopcodes.h lstring.h \
  ltable.h lvm.h
-lzio.o: lzio.c lprefix.h lua.h luaconf.h llimits.h lmem.h lstate.h \
+lzio.lo: lzio.c lprefix.h lua.h luaconf.h llimits.h lmem.h lstate.h \
  lobject.h ltm.h lzio.h
 
 # (end of Makefile)