This patch is to be applied to the Lua 5.3 source file to get a shared
library. This is because the authors of Lua don't bother distributing
a working build system for their software, so we have to make one...

As unfortunate as it may be, there is nothing else we can do.

                                            -- Da SimGrid team.

diff --git a/Makefile b/Makefile
index 5ee5601..93830a3 100644
--- a/Makefile
+++ b/Makefile
@@ -52,7 +52,7 @@ R= $V.1
 all:	$(PLAT)

 $(PLATS) clean:
-	cd src && $(MAKE) $@
+	cd src && $(MAKE) $@ V=$(V) R=$(R)

 test:	dummy
 	src/lua -v
diff --git a/src/Makefile b/src/Makefile
index d71c75c..64bda79 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -7,7 +7,7 @@
 PLAT= none

 CC= gcc -std=gnu99
-CFLAGS= -O2 -Wall -Wextra -DLUA_COMPAT_5_2 $(SYSCFLAGS) $(MYCFLAGS)
+CFLAGS= -O2 -Wall -Wextra -DLUA_COMPAT_5_2 $(SYSCFLAGS) $(MYCFLAGS) -fPIC
 LDFLAGS= $(SYSLDFLAGS) $(MYLDFLAGS)
 LIBS= -lm $(SYSLIBS) $(MYLIBS)

@@ -29,6 +29,7 @@ MYOBJS=
 PLATS= aix bsd c89 freebsd generic 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_T=	luac
 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.
@@ -59,6 +60,11 @@ $(LUA_A): $(BASE_O)
 	$(AR) $@ $(BASE_O)
 	$(RANLIB) $@

+$(LUA_SO): $(CORE_O) $(LIB_O)
+	$(CC) -shared -ldl -Wl,-soname,$(LUA_SO).$(V) -o $@.$(R) $? -lm $(MYLDFLAGS)
+	ln -sf $(LUA_SO).$(R) $(LUA_SO).$(V)
+	ln -sf $(LUA_SO).$(R) $(LUA_SO)
+
 $(LUA_T): $(LUA_O) $(LUA_A)
 	$(CC) -o $@ $(LDFLAGS) $(LUA_O) $(LUA_A) $(LIBS)