Makefile.in

   1 ### -*-makefile-gmake-*-
   2 ###
   3 ### Top-level build script for toy project.
   4 ###
   5 ### (c) 2019 Mark Wooding
   6 ###
   7
   8 ###----- Licensing notice ---------------------------------------------------
   9 ###
  10 ### This program is free software; you can redistribute it and/or modify
  11 ### it under the terms of the GNU Library General Public License as
  12 ### published by the Free Software Foundation; either version 2 of the
  13 ### License, or (at your option) any later version.
  14 ###
  15 ### This program is distributed in the hope that it will be useful,
  16 ### but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ### GNU Library General Public License for more details.
  19 ###
  20 ### You should have received a copy of the GNU Library General Public
  21 ### License along with this program; if not, write to the Free
  22 ### Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  23 ### MA 02111-1307, USA.
  24
  25 ## Default target.
  26 all::
  27
  28 ###--------------------------------------------------------------------------
  29 ### Configuration things.
  30
  31 ## (This is a toy.  More stuff is needed in a proper project.)
  32
  33 ## Source and build directories.
  34 srcdir                   = @srcdir@
  35 abs_srcdir               = @abs_srcdir@
  36 abs_builddir             = @abs_builddir@
  37
  38 ## Installation directories.
  39 prefix                   = @prefix@
  40 exec_prefix              = @exec_prefix@
  41 bindir                   = @bindir@
  42
  43 ## Build options.
  44 CC                       = @CC@
  45 CFLAGS                   = @CFLAGS@
  46 DEFS                     = @DEFS@
  47 INCLUDES                 = @INCLUDES@
  48 LD                       = @CC@
  49 LDFLAGS                  = @LDFLAGS@
  50 LIBS                     = @LIBS@
  51
  52 INCLUDES                += -I$(srcdir)/lib/
  53
  54 ###--------------------------------------------------------------------------
  55 ### Machinery.
  56
  57 dirvars                  =
  58 dirtargets               =
  59 ALL_SUBDIRS             :=
  60 D                       :=
  61 %dirstack               :=
  62
  63 dirvars                 += TARGETS PROGRAMS LIBS CLEANFILES
  64 dirtargets              += all clean check install
  65
  66 define %descend-subdir
  67   %dirstack             := $$D $$(%dirstack)
  68   D                     := $$(if $$D,$$D/)$1
  69   ALL_SUBDIRS           += $$D
  70   include $$(srcdir)/$$D/Subdir.mk
  71   D                     := $$(firstword $$(dirstack))
  72   %dirstack             := $$(wordlist 2,$$(words $$(%dirstack)),$$(%dirstack))
  73 endef
  74 descend-subdirs          = $(foreach d,$1, \
  75                                 $(eval $(call %descend-subdir,$d)))
  76
  77 V                        = 0
  78 v-tag                    = $(call %v-tag.$V,$1)
  79 %v-tag.0                 = @printf "  %-8s %s\n" "$1" "$@";
  80 %v-tag.1                 =
  81
  82 V_AT                     = $(%V_AT.$V)
  83 %V_AT.0                  = @
  84 %V_AT.1                  =
  85
  86 VPATH                    = $(srcdir)
  87
  88 COMPILE                  = $(call v-tag,CC)$(CC) -c -o$@ -MD \
  89                                 $(DEFS) $(INCLUDES) $(CFLAGS)
  90 %.o: %.c
  91         $(COMPILE) $<
  92
  93 LINK                     = $(call v-tag,LD)$(LD) -o$@ \
  94                                 $(CFLAGS) $(LDFLAGS) $(LIBS)
  95
  96 objects                  = $(addsuffix $(if $2,$2,.o), \
  97                                 $(basename $(filter %.c %.s %.S,$1)))
  98
  99 ALL_DEPFILES            :=
 100 notice-objects           = $(eval ALL_DEPFILES += $$(patsubst %.o,%.d,$1))
 101
 102 ###--------------------------------------------------------------------------
 103 ### Descend into subdirectories.
 104
 105 SUBDIRS                  =
 106
 107 SUBDIRS                 += lib
 108 SUBDIRS                 += src
 109
 110 $(call descend-subdirs, $(SUBDIRS))
 111
 112 ###--------------------------------------------------------------------------
 113 ### Maintaining the build system.
 114
 115 $(srcdir)/configure: $(srcdir)/configure.ac
 116         $(call v-tag,AUTOCONF)cd $(srcdir) && autoconf
 117
 118 config.status: $(srcdir)/configure
 119         $(call v-tag,CONFIG)./config.status --recheck
 120
 121 Makefile: config.status $(srcdir)/Makefile.in \
 122                 $(foreach d,$(ALL_SUBDIRS), $d/Makefile)
 123         $(call v-tag,SUBST)./config.status Makefile
 124 $(foreach d,$(ALL_SUBDIRS), \
 125         $(eval $d/Makefile: config.status $$(srcdir)/$d/Makefile.in; \
 126                 $$(call v-tag,SUBST)./config.status $$@))
 127
 128 ###--------------------------------------------------------------------------
 129 ### More machinery.
 130
 131 all_dirtargets           = $(foreach d,$(ALL_SUBDIRS), \
 132                                 $(foreach t,$(dirtargets), $d/$t))
 133
 134 $(all_dirtargets)::
 135
 136 ifeq ($(origin SUBDIR),undefined)
 137 $(foreach t,$(dirtargets), \
 138         $(eval $t:: $(foreach d,$(ALL_SUBDIRS),$d/$t)))
 139 else
 140 $(foreach t,$(dirtargets), \
 141         $(eval $t:: $(SUBDIR)/$t))
 142 endif
 143 $(foreach d,$(SUBDIRS), \
 144         $(foreach t,$(dirtargets), \
 145                 $(eval $d/$t::)))
 146 .PHONY: $(foreach t,$(dirtargets),$t $(foreach d,$(ALL_SUBDIRS),$d/$t))
 147
 148 $(foreach d,$(ALL_SUBDIRS), $d/clean):: %/clean:
 149         rm -f $*/*.o $*/*.d $($*_CLEANFILES)
 150
 151 realclean:: clean
 152         rm -f config.status config.log
 153         rm -f Makefile $(foreach d,$(ALL_SUBDIRS), $d/Makefile)
 154
 155 -include $(ALL_DEPFILES)
 156
 157 ###----- That's all, folks --------------------------------------------------