comments updated

[henge/apc.git] / Makefile

diff --git a/Makefile b/Makefile
index d6689db..7b8934d 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -5,37 +5,86 @@
 ################################################################################
 # This makefile builds APC, the Asset Package Compiler for Henge, on the system.
 ################################################################################
-# Directories (can override with env vars)
-APC_ROOTDIR := $(if $(APC_ROOTDIR),$(APC_ROOTDIR),.)
-APC_SRCDIR  := $(if $(APC_SRCDIR),$(APC_SRCDIR),$(APC_ROOTDIR)/src)
+# Driver sources
+DRIVERS ?= apc testapc testston
 
-# APC is built from Ragel, Bison and C source code only.
-ySRC  := $(shell find $(APC_SRCDIR) -type f -name '*.y')
-rlSRC := $(shell find $(APC_SRCDIR) -type f -name '*.rl')
-cSRC  := $(shell find $(APC_SRCDIR) -type f -name '*.c')
+# Debug Level
+DEBUG   ?= 1
+
+# Yacc
+YACC   := bison
+YFLAGS ?= -v -d -Wall
+YCMD    = $(strip $(YACC) $(YFLAGS) $(if $2,$(dir $2))$1)
+YCMD   += $(if $2,&& mv $(notdir $(1:%.y=%.tab.[ch])) $(dir $2))
+
+# Ragel
+RLC     ?= ragel
+RLFLAGS ?= -C
+RLCMD    = $(strip $(RLC) $(RLFLAGS) $(if $2,-o $2 $(dir $2))$1)
+
+# C
+CC     ?= gcc
+CFLAGS ?= -Wall
+CCMD    = $(strip $(CC) $(CFLAGS) $(CPPFLAGS) -c $(if $2,-o $2) $1)
+
+# Linker
+LD        ?= ld
+LDFLAGS   ?= 
+LDLIBS    ?= -lunistring
+apcLIBS   ?= 
+apc-dLIBS ?= 
+LDCMD      = $(strip $(CC) $(LDFLAGS) $(if $2,-o $2) $1) $(LDLIBS) $($1LIBS) 
 
-# Specify the linker (allow env var override)
-LD    := $(if $(LD),$(LD),ld)
+# APC is built from Ragel, Bison and C source code only.
+ySRC  := $(shell find src/ -type f -name '*.y')
+rlSRC := $(shell find src/ -type f -name '*.rl')
+cSRC  := $(shell find src/ -type f -name '*.c')
 
 # Generated files from Yacc/Bison and Ragel
 hGEN  := $(ySRC:%.y=%.tab.h)
-cGEN  := $(strip $(ySRC:%.y=%.tab.c) $(rlSRC:%.rl=%.c))
+cGEN  := $(strip $(ySRC:%.y=%.tab.c) $(rlSRC:%.rl=%.fsm.c))
+.SECONDARY: $(cGEN)
 
-# Rules
-apc-d: $(patsubst %.c,%-d.o,$(cSRC) $(cGEN)) | $(hGEN)
-       $(LD) $(LDFLAGS) $(LDLIBS) $<
+# Determine binary/ir targets (object files and driver binaries)
+cTRG  := $(patsubst %.c,%.o,$(cSRC) $(cGEN))
+ldSRC := $(filter-out $(DRIVERS:%=\%/%.o),$(cTRG))
+cTRG  += $(cTRG:%.o=%-d.o)
+ldTRG := $(DRIVERS:%=%-d) $(DRIVERS)
+ldDEP  = $(filter %/$1.o,$(cTRG))
+ldDEP += $(if $(filter testston%,$1),,$(if $(filter %-d,$1),$(ldSRC:%.o=%-d.o),$(ldSRC)))
 
-apc: $(patsubst %.c,%.o,$(cSRC) $(cGEN)) | $(hGEN)
-       $(LD) $(LDFLAGS) $(LDLIBS) $<
+# Determine if '1' is newer than '2'
+TSTAMP = $(if $(wildcard $1),$(shell stat -c %Y $1),)
+NEWER  = $(eval 4 := $(call TSTAMP,$(dir $2)$1))
+NEWER += $(eval 5 := $(call TSTAMP,$2))
+NEWER += $(if $(filter $5,$(firstword $(sort $4 $5))),$1,$2)
 
-%.tab.h %.tab.c: %.y
-       bison -d $(YFLAGS) $<
+ifeq (,$(filter clean,$(MAKECMDGOALS)))
+# Deps should be generated for each source file, when not cleaning
+cGENDEP = $(if $(wildcard $1),$(subst $(dir $1),,$(filter-out $1 \ %:,$(shell $(CC) -MM -MG $1))),\
+$(info [<$1>: no deps - file not found]))
+# Filter only missing deps
+cMISDEP = $(strip $(foreach dep,$(call cGENDEP,$1),$(if $(wildcard src/$(dep)),,$(dep))))
+# S2S will print the command necessary to create a file when called
+S2S  = $(if $(filter $2,$(call NEWER,$2,$3)),$(eval 4 := t),$(eval 4 :=))
+S2S += $(if $4,$(info $(call $1,$2,$3)))
+ifeq (,$(filter n,$(MAKEFLAGS)))
+# Unless we're in -n mode, S2S should also invoke the command on the shell
+S2S += $(if $4,$(shell $(call $1,$2,$3)))
+endif
+endif
 
-cFLAGS = $(strip $(CFLAGS) $(CPPFLAGS) $1 $2 $3 $4 $5 $6 $7 $8 $9)
-GENDEP = $(filter-out \ %:,$(shell $(CC) -MM -MG $1))
-.SECONDEXPANSION:
-%.o: %.c $$(call GENDEP,$$(dir $$@)%.c)
-       $(CC) $(call cFLAGS,-c,-o $@) $<
+# Clean targets
+cleanCMD = $(if $(wildcard $1),rm $(wildcard $(sort $1)))
 
-%-d.o: $$(call GENDEP,$$(dir $$@)%.c) $$(info [DEPS|$$@] $$(call GENDEP,$$(dir $$@)%.c)) 
-       $(CC) $(call cFLAGS,-c,-Og,-ggdb,-o $@) $<
+# Rules
+.SECONDEXPANSION:
+$(ldTRG): $$(call ldDEP,$$@) | $(hGEN) ; $(call LDCMD,$^,$@)
+%-d.o: CFLAGS+= -Og -ggdb -DDEBUG=$(DEBUG)
+%.o %-d.o: %.c $$(call cGENDEP,$$(dir $$@)%.c); $(call CCMD,$<,$@)
+%.o %-d.o: %.c; $(error Missing dependencies for $<: $(call cMISDEP, $<))
+%.tab.h: %.tab.c ;
+%.tab.c: %.y $$(call S2S,YCMD,%.y,$$@) ;
+%.fsm.c: %.rl $$(call S2S,RLCMD,%.rl,$$@) ;
+clean: ; $(call cleanCMD,$(cGEN) $(hGEN) $(cTRG))
+distclean: clean ; $(call cleanCMD,$(ldTRG))