From: Denis Osterland <Denis.Osterland@diehl.com>
Date: Wed, 28 Jun 2017 15:52:42 +0200
Subject: [PATCH] Cross-compile in ptxdist envirionment.

Signed-off-by: Denis Osterland <Denis.Osterland@diehl.com>
---
 Makefile     | 10 +++++++---
 src/Makefile | 18 ++++++++++--------
 2 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/Makefile b/Makefile
index 119110d2f010..c40c4cd6e0f7 100644
--- a/Makefile
+++ b/Makefile
@@ -4,13 +4,13 @@
 # == CHANGE THE SETTINGS BELOW TO SUIT YOUR ENVIRONMENT =======================
 
 # Your platform. See PLATS for possible values.
-PLAT= none
+PLAT= linux
 
 # Where to install. The installation starts in the src and doc directories,
 # so take care if INSTALL_TOP is not an absolute path. See the local target.
 # 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_TOP= $(DESTDIR)/usr
 INSTALL_BIN= $(INSTALL_TOP)/bin
 INSTALL_INC= $(INSTALL_TOP)/include
 INSTALL_LIB= $(INSTALL_TOP)/lib
@@ -52,7 +52,7 @@ R= $V.4
 all:	$(PLAT)
 
 $(PLATS) clean:
-	cd src && $(MAKE) $@
+	cd src && $(MAKE) $@ R=$R
 
 test:	dummy
 	src/lua -v
@@ -62,6 +62,10 @@ install: dummy
 	cd src && $(INSTALL_EXEC) $(TO_BIN) $(INSTALL_BIN)
 	cd src && $(INSTALL_DATA) $(TO_INC) $(INSTALL_INC)
 	cd src && $(INSTALL_DATA) $(TO_LIB) $(INSTALL_LIB)
+	cd src && $(INSTALL_EXEC) liblua.so.$R $(INSTALL_LIB)
+	ln -s liblua.so.$R $(INSTALL_LIB)/liblua.so.$V
+	ln -s liblua.so.$R $(INSTALL_LIB)/liblua.so.$(basename $V)
+	ln -s liblua.so.$V $(INSTALL_LIB)/liblua.so
 	cd doc && $(INSTALL_DATA) $(TO_MAN) $(INSTALL_MAN)
 
 uninstall:
diff --git a/src/Makefile b/src/Makefile
index d71c75c87322..8ad9a1b718ad 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -4,15 +4,13 @@
 # == CHANGE THE SETTINGS BELOW TO SUIT YOUR ENVIRONMENT =======================
 
 # Your platform. See PLATS for possible values.
-PLAT= none
+PLAT= linux
 
-CC= gcc -std=gnu99
-CFLAGS= -O2 -Wall -Wextra -DLUA_COMPAT_5_2 $(SYSCFLAGS) $(MYCFLAGS)
+CFLAGS= -std=gnu99 -fPIC -O2 -Wall -Wextra -DLUA_COMPAT_5_2 $(SYSCFLAGS) $(MYCFLAGS)
 LDFLAGS= $(SYSLDFLAGS) $(MYLDFLAGS)
 LIBS= -lm $(SYSLIBS) $(MYLIBS)
 
-AR= ar rcu
-RANLIB= ranlib
+ARFLAGS= rcu
 RM= rm -f
 
 SYSCFLAGS=
@@ -29,6 +27,7 @@ MYOBJS=
 PLATS= aix bsd c89 freebsd generic linux macosx mingw posix solaris
 
 LUA_A=	liblua.a
+LUA_SO= liblua.so.$R
 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
@@ -43,8 +42,8 @@ LUAC_T=	luac
 LUAC_O=	luac.o
 
 ALL_O= $(BASE_O) $(LUA_O) $(LUAC_O)
-ALL_T= $(LUA_A) $(LUA_T) $(LUAC_T)
-ALL_A= $(LUA_A)
+ALL_T= $(LUA_A) $(LUA_SO) $(LUA_T) $(LUAC_T)
+ALL_A= $(LUA_A) $(LUA_SO)
 
 # Targets start here.
 default: $(PLAT)
@@ -56,9 +55,12 @@ o:	$(ALL_O)
 a:	$(ALL_A)
 
 $(LUA_A): $(BASE_O)
-	$(AR) $@ $(BASE_O)
+	$(AR) $(ARFLAGS) $@ $(BASE_O)
 	$(RANLIB) $@
 
+$(LUA_SO): $(BASE_O)
+	$(CC) -shared -Wl,-soname=liblua.so.$(basename $V) -o $@ $(BASE_O) $(filter-out %readline, $(LIBS))
+
 $(LUA_T): $(LUA_O) $(LUA_A)
 	$(CC) -o $@ $(LDFLAGS) $(LUA_O) $(LUA_A) $(LIBS)