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#!/bin/python

import sys

NAME     = "rules.mk"
TEMPLATE = """# ---- Push on stack ----
SP 			   := $(SP).x
DIRSTACK_$(SP) := $(d)
d 			   := $(DIR)

# Iterate through subdirectory tree

# Local sources
SRCS_$(d) := $(wildcard $(d)/*.c)
OBJS_$(d) := $(SRCS_$(d):.c=.o)
OBJS_$(d) := $(patsubst $(SRC_DIR)/%, $(OBJ_DIR)/%, $(OBJS_$(d)))
DEPS_$(d) := $(OBJS_$(d):.o=.d)

OBJS := $(OBJS) $(OBJS_$(d))
DEPS := $(DEPS) $(DEPS_$(d))

# Local targets
LIBS_$(d) :=
LIBS_$(d) := $(patsubst $(SRC_DIR)/%, $(OBJ_DIR)/%, $(LIBS_$(d)))
LIBS 	  := $(LIBS) $(LIBS_$(d))

BINS_$(d) :=
BINS_$(d) := $(patsubst $(SRC_DIR)/%, $(OBJ_DIR)/%, $(BINS_$(d)))
BINS 	  := $(BINS) $(BINS_$(d))

# Local rules
# $(LIBS_$(d)) := TGTFLAGS :=
# $(LIBS_$(d)) := TGTINCS  :=
# $(LIBS_$(d)) := TGTLIBS  :=

$(LIBS_$(d)): $(OBJS_$(d))
	$(ARCHIVE)

$(BINS_$(d)): $(OBJ_DIR)/libn/test.o
	$(LINK)

# ---- Pop off stack ----
-include $(DEPS_$(d))

d  := $(DIRSTACK_$(SP))
SP := $(basename $(SP))"""

if __name__ == "__main__":
    try:
        with open(NAME, 'x') as makefile:
            makefile.write(f"{TEMPLATE}\n")
    except:
        print("rules.mk already present", file=sys.stderr)
        exit(1)