# This file:
#   http://anggtwu.net/LuaC/Makefile.html
#   http://anggtwu.net/LuaC/Makefile
#          (find-angg "LuaC/Makefile")
# Author: Eduardo Ochs <eduardoochs@gmail.com>
#
# (defun e () (interactive) (find-angg "LuaC/Makefile"))
# (find-es "lua5" "binary_module")
# (find-luabm0file "Makefile")
# (find-node "(make)Automatic Variables" "$@" "target of the rule")
# (find-node "(make)Automatic Variables" "$*" "stem")

#LIBTOOL = libtool --silent --tag=CC
LIBTOOL = libtool --tag=CC

LUA_CFLAGS   := $(shell pkg-config lua5.1 --cflags)
LUA_LDFLAGS  := $(shell pkg-config lua5.1 --libs)
LUA_LDSFLAGS := $(shell pkg-config lua5.1 --static --libs)
# this is the path where you'll eventually install the module
RPATH=$(shell pkg-config lua5.1 --define-variable=prefix=/usr/local \
	--variable=INSTALL_CMOD)

# Following is a build and use example for a binary Lua module "foo".  The
# implementation is in "lua-foo.c".  To support dynamic loading conventions
# it will need to have an open function named "luaopen_foo" which registers
# the global module "foo".

test: test-dynamic

# compile source to make objects for static and dynamic link
lua-%.lo: lua-%.c
	$(LIBTOOL) --mode=compile $(CC) -c -Wall -O2 $(LUA_CFLAGS) lua-$*.c

# link objects to make static and dynamic libraries.  The .so will be
# left in "./.libs/".  Note that the Lua library and its dependencies are
# not called out on the link line since they are assumed to be part of
# whatever our library is linked to.  We want to avoid duplicate library
# copies, which is a waste of space and can cause run-time problems.

liblua-%.la %.so: lua-%.lo
	$(LIBTOOL) --mode=link $(CC) \
		-rpath $(RPATH) \
		$(LUA_LDSFLAGS) \
		-o liblua-$*.la lua-$*.lo
	ln -sf ./.libs/liblua-$*.so $*.so

# If all went well, we can dynamically load the module into Lua.  The
# following will load the library into the interpreter and call a function.
test-dynamic: foo.so
	lua5.1 -l foo -e 'print(foo.get_greeting())'

clean:
	$(RM) *.o *.lo *.la *.so app
	$(RM) -r ./.libs/

# See: (find-eepitch-intro "3.3. `eepitch-preprocess-line'")
# (setq eepitch-preprocess-regexp "^")
# (setq eepitch-preprocess-regexp "^#T ?")
#
#T * (eepitch-shell)
#T * (eepitch-kill)
#T * (eepitch-shell)
#T make clean
#T make test-dynamic
#T laf -R
#T
#T make test-dynamic
#T make -n test-dynamic