Reflect override of INSTALL_LJLIBD in package.path.

Suggested by GitSparTV. #1239

Makefile

@@ -41,7 +41,7 @@ INSTALL_SHARE= $(DPREFIX)/share
 INSTALL_DEFINC= $(DPREFIX)/include/luajit-$(MMVERSION)
 INSTALL_INC=   $(INSTALL_DEFINC)
 
-INSTALL_LJLIBD= $(INSTALL_SHARE)/luajit-$(MMVERSION)
+export INSTALL_LJLIBD= $(INSTALL_SHARE)/luajit-$(MMVERSION)
 INSTALL_JITLIB= $(INSTALL_LJLIBD)/jit
 INSTALL_LMODD= $(INSTALL_SHARE)/lua
 INSTALL_LMOD= $(INSTALL_LMODD)/$(ABIVER)

src/Makefile

@@ -299,6 +299,9 @@ endif
 ifneq (,$(LMULTILIB))
   TARGET_XCFLAGS+= -DLUA_LMULTILIB=\"$(LMULTILIB)\"
 endif
+ifneq (,$(INSTALL_LJLIBD))
+  TARGET_XCFLAGS+= -DLUA_LJDIR=\"$(INSTALL_LJLIBD)\"
+endif
 
 ##############################################################################
 # Target system detection.

src/luaconf.h

@@ -37,7 +37,6 @@
 #endif
 #define LUA_LROOT	"/usr/local"
 #define LUA_LUADIR	"/lua/5.1/"
-#define LUA_LJDIR	"/luajit-2.1/"
 
 #ifdef LUA_ROOT
 #define LUA_JROOT	LUA_ROOT
@@ -51,7 +50,11 @@
 #define LUA_RCPATH
 #endif
 
-#define LUA_JPATH	";" LUA_JROOT "/share" LUA_LJDIR "?.lua"
+#ifndef LUA_LJDIR
+#define LUA_LJDIR	LUA_JROOT "/share/luajit-2.1"
+#endif
+
+#define LUA_JPATH	";" LUA_LJDIR "/?.lua"
 #define LUA_LLDIR	LUA_LROOT "/share" LUA_LUADIR
 #define LUA_LCDIR	LUA_LROOT "/" LUA_LMULTILIB LUA_LUADIR
 #define LUA_LLPATH	";" LUA_LLDIR "?.lua;" LUA_LLDIR "?/init.lua"