Makefile

# This Makefile builds all m4 files before forwarding
# control over to Makefile.main, which contains the primary
# build rules. These two parts of the build are split up in
# order to easily facilitate dynamic dependency calculation
# on m4 generated files.

include var.mk

M4_SOURCES=$(shell find . -type f -name *.m4 -not -path "./$(M4_LIB_DIR)/*")
M4_TARGETS=$(patsubst %.m4,%,$(M4_SOURCES))

all: $(STACKBC) $(STACKBVM)
clean:
	rm -f $(STACKBC) $(STACKBVM) $(VM_DIR)/*.o $(C_DIR)/*.cmx $(M4_TARGETS)
$(M4_TARGETS): %: %.m4 $(DATA_FILES) $(M4_LIB_SOURCES)
	$(M4) $< > $@ || ( rm -f $@; exit 1 )
$(STACKBC) $(STACKBVM): build.mk $(M4_TARGETS)
	$(MAKE) -f $< $@


# CC=gcc
# ifdef DEBUG
# CC_FLAGS=-g
# endif
# OCAMLFIND_OPTS=-package core_kernel -package bigarray -package ppx_deriving -package angstrom
# 
# # for escaping
# SEMICOLON=;
# 
# VM_DIR=vm
# VM_SRC_C=$(wildcard $(VM_DIR)/*.c)
# VM_SRC_M4=$(wildcard $(VM_DIR)/*.m4)
# 
# VM_SRC_M4_TARGET=$(patsubst %.m4,%,$(VM_SRC_M4))
# VM_SRC_M4_TARGET_C=$(filter %.c,$(VM_SRC_M4_TARGET))
# VM_SRC_M4_TARGET_NON_C=$(filter-out %.c,$(VM_SRC_M4_TARGET))
# 
# VM_SRC_C_OBJ=$(patsubst %.c,%.o,$(VM_SRC_C))
# VM_SRC_M4_TARGET_C_OBJ=$(patsubst %.c,%.o,$(VM_SRC_M4_TARGET_C))
# 
# VM_OBJ=$(shell echo $(VM_SRC_C_OBJ) $(VM_SRC_M4_TARGET_C_OBJ) | tr ' ' '\n' | awk '!a[$$0]++')
# 
# .PHONY: all clean
# all: stackbvm stackbc
# clean:
# 	rm -f stackbvm stackbc $(VM_OBJ) $(VM_SRC_M4_TARGET)
# 
# stackbc: stackbc.ml
# 	ocamlfind ocamlopt $(OCAMLFIND_OPTS) $< -o $@
# 
# stackbvm: $(VM_OBJ)
# 	$(CC) $(CC_FLAGS) $^ -o $@
# 
# # m4 rules
# $(VM_SRC_M4_TARGET): $(wildcard data/*) $(wildcard m4/*.m4)
# $(VM_SRC_M4_TARGET_NON_C): %: %.m4
# 	m4 $< > $@ || ( rm -f $@; exit 1 )
# # This trick currently runs m4 on each file
# # every build regardless of whether it's needed,
# # and it runs m4 a second time when it actually
# # needs to build it. Obviously, this is suboptimal,
# # but a fix would be tricky (maybe have a phony target
# # for each m4 target to reduce m4 passes to 1 per run,
# # but that doesn't fix running m4 when it's not needed).
# .SECONDEXPANSION:
# $(VM_SRC_M4_TARGET_C): %.c: %.c.m4 \
#   $$(addprefix $(VM_DIR)/,$$(shell \
#     m4 $$*.c.m4 | $(CC) -xc -MM -MG - | cut -d' ' -f2-))
# 	m4 $< > $@ || rm -f $@
# 
# # c rules
# .SECONDEXPANSION:
# $(VM_OBJ): %.o: %.c \
#   $$(addprefix $(VM_DIR)/,$$(shell \
#     [ -f $$*.c -a ! -f $$*.c.m4 ] &&\
#     (\
#       cd $$(dir $$*)$$(SEMICOLON)\
#       $(CC) -MM -MG $$(notdir $$*.c)\
#     ) | cut -d' ' -f2-))
# 	$(CC) $(CC_FLAGS) -c $< -o $@