Makefile

   1 ################################################################################
   2 # Desc:   APC make script
   3 # Author: kgr
   4 # Date:   2016
   5 ################################################################################
   6 # This makefile builds APC, the Asset Package Compiler for Henge, on the system.
   7 ################################################################################
   8 # Driver sources
   9 DRIVERS ?= apc testapc
  10
  11 # Debug Level
  12 DEBUG   ?= 1
  13
  14 # Yacc
  15 YACC   := bison
  16 YFLAGS ?= -v -d -Wall
  17 YCMD    = $(strip $(YACC) $(YFLAGS) $(if $2,$(dir $2))$1)
  18 YCMD   += $(if $2,&& mv $(notdir $(1:%.y=%.tab.[ch])) $(dir $2))
  19
  20 # Ragel
  21 RLC     ?= ragel
  22 RLFLAGS ?= -C
  23 RLCMD    = $(strip $(RLC) $(RLFLAGS) $(if $2,-o $2 $(dir $2))$1)
  24
  25 # C
  26 CC     ?= gcc
  27 CFLAGS ?= -Wall
  28 CCMD    = $(strip $(CC) $(CFLAGS) $(CPPFLAGS) -c $(if $2,-o $2) $1)
  29
  30 # Linker
  31 LD        ?= ld
  32 LDFLAGS   ?=
  33 LDLIBS    ?= -lunistring
  34 apcLIBS   ?=
  35 apc-dLIBS ?=
  36 LDCMD      = $(strip $(CC) $(LDFLAGS) $(if $2,-o $2) $1) $(LDLIBS) $($1LIBS)
  37
  38 # APC is built from Ragel, Bison and C source code only.
  39 ySRC  := $(shell find src/ -type f -name '*.y')
  40 rlSRC := $(shell find src/ -type f -name '*.rl')
  41 cSRC  := $(shell find src/ -type f -name '*.c')
  42
  43 # Generated files from Yacc/Bison and Ragel
  44 hGEN  := $(ySRC:%.y=%.tab.h)
  45 cGEN  := $(strip $(ySRC:%.y=%.tab.c) $(rlSRC:%.rl=%.fsm.c))
  46 .SECONDARY: $(cGEN)
  47
  48 # Determine binary/ir targets (object files and driver binaries)
  49 cTRG  := $(patsubst %.c,%.o,$(cSRC) $(cGEN))
  50 ldSRC := $(filter-out $(DRIVERS:%=\%/%.o),$(cTRG))
  51 cTRG  += $(cTRG:%.o=%-d.o)
  52 ldTRG := $(DRIVERS:%=%-d) $(DRIVERS)
  53 ldDEP  = $(filter %/$1.o,$(cTRG)) $(if $(filter %-d,$1),$(ldSRC:%.o=%-d.o),$(ldSRC))
  54
  55 # Determine if '1' is newer than '2'
  56 TSTAMP = $(if $(wildcard $1),$(shell stat -c %Y $1),0$(info nots: $1))
  57 NEWER  = $(eval 4 := $(call TSTAMP,$(dir $2)$1))
  58 NEWER += $(eval 5 := $(call TSTAMP,$2))
  59 NEWER += $(if $(filter $5,$(firstword $(sort $4 $5))),$1,$2)
  60
  61 ifeq (,$(filter clean,$(MAKECMDGOALS)))
  62 # Deps should be generated for each source file, when not cleaning
  63 cGENDEP = $(if $(wildcard $1),$(subst $(dir $1),,$(filter-out $1 \ %:,$(shell $(CC) -MM -MG $1))),\
  64 $(info [<$1>: no deps - file not found]))
  65 # Filter only missing deps
  66 cMISDEP = $(strip $(foreach dep,$(call cGENDEP,$1),$(if $(wildcard src/$(dep)),,$(dep))))
  67 # S2S will print the command necessary to create a file when called
  68 S2S  = $(if $(filter $2,$(call NEWER,$2,$3)),$(eval 4 := t),$(eval 4 :=))
  69 S2S += $(if $4,$(info $(call $1,$2,$3)))
  70 ifeq (,$(filter n,$(MAKEFLAGS)))
  71 # Unless we're in -n mode, S2S should also invoke the command on the shell
  72 S2S += $(if $4,$(shell $(call $1,$2,$3)))
  73 endif
  74 endif
  75
  76 # Clean targets
  77 cleanCMD = $(if $(wildcard $1),rm $(wildcard $(sort $1)))
  78
  79 # Rules
  80 .SECONDEXPANSION:
  81 $(ldTRG): $$(call ldDEP,$$@) | $(hGEN) ; $(call LDCMD,$^,$@)
  82 %-d.o: CFLAGS+= -Og -ggdb -DDEBUG=$(DEBUG)
  83 %.o %-d.o: %.c $$(call cGENDEP,$$(dir $$@)%.c); $(call CCMD,$<,$@)
  84 %.o %-d.o: %.c; $(error Missing dependencies for $<: $(call cMISDEP, $<))
  85 %.tab.h: %.tab.c ;
  86 %.tab.c: %.y $$(call S2S,YCMD,%.y,$$@) ;
  87 %.fsm.c: %.rl $$(call S2S,RLCMD,%.rl,$$@) ;
  88 clean: ; $(call cleanCMD,$(cGEN) $(hGEN) $(cTRG))
  89 distclean: clean ; $(call cleanCMD,$(ldTRG))