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