diff -ru lua-5.2.1/Makefile lua-5.2.1.patched/Makefile
--- lua-5.2.1/Makefile	2012-05-17 16:05:54.032768000 +0200
+++ lua-5.2.1.patched/Makefile	2012-08-12 16:50:24.994574336 +0200
@@ -36,12 +36,12 @@
 # == END OF USER SETTINGS -- NO NEED TO CHANGE ANYTHING BELOW THIS LINE =======
 
 # Convenience platforms targets.
-PLATS= aix ansi bsd freebsd generic linux macosx mingw posix solaris
+PLATS= aix ansi bsd freebsd generic haiku linux macosx mingw posix solaris
 
 # What to install.
 TO_BIN= lua luac
 TO_INC= lua.h luaconf.h lualib.h lauxlib.h lua.hpp
-TO_LIB= liblua.a
+TO_LIB= liblua.a liblua.so
 TO_MAN= lua.1 luac.1
 
 # Lua version and release.
diff -ru lua-5.2.1/src/luaconf.h lua-5.2.1.patched/src/luaconf.h
--- lua-5.2.1/src/luaconf.h	2012-05-11 16:14:42.025690112 +0200
+++ lua-5.2.1.patched/src/luaconf.h	2012-08-12 16:56:30.385875968 +0200
@@ -40,6 +40,13 @@
 
 
 
+#if defined(LUA_USE_HAIKU)
+#define LUA_USE_MKSTEMP
+#define LUA_USE_ISATTY
+#define LUA_USE_POPEN
+#define LUA_USE_DLOPEN
+#endif
+
 #if defined(LUA_USE_LINUX)
 #define LUA_USE_POSIX
 #define LUA_USE_DLOPEN		/* needs an extra library: -ldl */
@@ -100,7 +107,11 @@
 #else			/* }{ */
 
 #define LUA_VDIR	LUA_VERSION_MAJOR "." LUA_VERSION_MINOR "/"
+#if defined(LUA_USE_HAIKU)
+#define LUA_ROOT	"/boot/common/"
+#else
 #define LUA_ROOT	"/usr/local/"
+#endif
 #define LUA_LDIR	LUA_ROOT "share/lua/" LUA_VDIR
 #define LUA_CDIR	LUA_ROOT "lib/lua/" LUA_VDIR
 #define LUA_PATH_DEFAULT  \
diff -ru lua-5.2.1/src/Makefile lua-5.2.1.patched/src/Makefile
--- lua-5.2.1/src/Makefile	2012-03-09 17:32:16.029884416 +0100
+++ lua-5.2.1.patched/src/Makefile	2012-08-12 16:52:43.662437888 +0200
@@ -26,9 +26,10 @@
 
 # == END OF USER SETTINGS -- NO NEED TO CHANGE ANYTHING BELOW THIS LINE =======
 
-PLATS= aix ansi bsd freebsd generic linux macosx mingw posix solaris
+PLATS= aix ansi bsd freebsd generic haiku linux macosx mingw posix solaris
 
 LUA_A=	liblua.a
+LUA_SO= liblua.so
 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
@@ -43,7 +44,7 @@
 LUAC_O=	luac.o
 
 ALL_O= $(BASE_O) $(LUA_O) $(LUAC_O)
-ALL_T= $(LUA_A) $(LUA_T) $(LUAC_T)
+ALL_T= $(LUA_A) $(LUA_T) $(LUAC_T) $(LUA_SO)
 ALL_A= $(LUA_A)
 
 # Targets start here.
@@ -65,6 +66,9 @@
 $(LUAC_T): $(LUAC_O) $(LUA_A)
 	$(CC) -o $@ $(LDFLAGS) $(LUAC_O) $(LUA_A) $(LIBS)
 
+$(LUA_SO): $(CORE_O) $(LIB_O)
+	$(CC) -o $@ -shared -fPIC $(LDFLAGS) $? $(LIBS)
+
 clean:
 	$(RM) $(ALL_T) $(ALL_O)
 
@@ -102,6 +106,9 @@
 
 generic: $(ALL)
 
+haiku:
+	$(MAKE) all MUCFLAGS=-DLUA_USE_HAIKU LIBS=
+
 linux:
 	$(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_LINUX" SYSLIBS="-Wl,-E -ldl -lreadline -lncurses"