nodemcu-firmware/app/lua/Makefile

#############################################################
# Required variables for each makefile
# Discard this section from all parent makefiles
# Expected variables (with automatic defaults):
#   CSRCS (all "C" files in the dir)
#   SUBDIRS (all subdirs with a Makefile)
#   GEN_LIBS - list of libs to be generated ()
#   GEN_IMAGES - list of images to be generated ()
#   COMPONENTS_xxx - a list of libs/objs in the form
#     subdir/lib to be extracted and rolled up into
#     a generated lib/image xxx.a ()
#
ifndef PDIR
SUBDIRS = luac_cross
GEN_LIBS = liblua.a
endif

STD_CFLAGS=-std=gnu11 -Wimplicit -Wall


# Validate LUA setting
ifeq ("$(LUA)","")
else ifeq ("$(LUA)","51")
  # ok
else ifeq ("$(LUA)","53")
  $(error Your variable LUA="$(LUA)" looks like you probably want \
    app/lua53/Makefile instead)
else
  $(error Unsupported value "$(LUA)" for variable "LUA", \
    expected empty/unset (recommended) or "51")
endif


#############################################################
# Configuration i.e. compile options etc.
# Target specific stuff (defines etc.) goes in here!
# Generally values applying to a tree are captured in the
#   makefile at its root level - these are then overridden
#   for a subtree within the makefile rooted therein
#
#DEFINES += -DDEVELOPMENT_TOOLS -DDEVELOPMENT_USE_GDB -DDEVELOPMENT_BREAK_ON_STARTUP_PIN=1
#EXTRA_CCFLAGS += -ggdb -O0

#############################################################
# Recursion Magic - Don't touch this!!
#
# Each subtree potentially has an include directory
#   corresponding to the common APIs applicable to modules
#   rooted at that subtree. Accordingly, the INCLUDE PATH
#   of a module can only contain the include directories up
#   its parent path, and not its siblings
#
# Required for each makefile to inherit from the parent
#

INCLUDES += -I ../uzlib
PDIR := ../$(PDIR)
sinclude $(PDIR)Makefile