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 RLFALGS ?= -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 $(LD) $(LDFLAGS) $(LDLIBS) $($1LIBS) $(if $2,-o $2) $1)
  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=%.c))
  43
  44 # Filter all other driver objects out of each driver's link commands.
  45 $(foreach drv,$(DRIVERS),\
  46 $(eval $(drv)SRC   := $(patsubst %.c,%.o,$(filter-out $(patsubst %,src/%.c,$(filter-out $(drv),$(DRIVERS))),$(cSRC) $(cGEN))))\
  47 $(eval $(drv)-dSRC := $(patsubst %.o,%-d.o,$($(drv)SRC))))
  48
  49 # Unless cleaning, deps should be generated for each source file
  50 ifeq (,$(filter clean,$(MAKECMDGOALS)))
  51 cGENDEP = $(if $(wildcard $1),$(subst $(dir $1),,$(filter-out $1 \ %:,$(shell $(CC) -MM -MG $1))),\
  52 $(info [<$1>: no deps - file not found]))
  53 endif
  54
  55 # Construct the S2S function for generating source files during prerequisite
  56 # expansion:
  57 # If we are cleaning, stop.  Else print the result of calling '1'.  Then, unless
  58 # we are in -n mode, invoke the result of calling '1' in the shell
  59 $(if $(filter clean,$(MAKECMDGOALS)),,$(eval S2S += $$(info $$(call $$1,$$2,$$3)))\
  60 $(if $(filter n,$(MAKEFLAGS)),,$(eval S2S += $$(shell $$(call $$1,$$2,$$3)))))
  61
  62 # Rules
  63 .SECONDEXPANSION:
  64 $(DRIVERS:%=%-d) $(DRIVERS): $$($$@SRC) | $(hGEN)
  65         $(strip $(call LDCMD,$^,$@))
  66
  67 %-d.o: CFLAGS+= -Og -ggdb
  68 %.o %-d.o: %.c $$(call cGENDEP,$$(dir $$@)%.c)
  69         $(call CCMD,$<,$@)
  70
  71 %.tab.h: %.tab.c ;
  72 %.tab.c: %.y $$(call S2S,YCMD,%.y,$$@) ;
  73 %.c: %.rl $$(call S2S,RLCMD,%.rl,$$@) ;
  74
  75 clean: $(wildcard $(cGEN) $(hGEN) $(apcSRC) $(apc-dSRC))
  76         $(if $^,rm $^)