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
  45 ###--------------------------------------------------------------------------
  46 ### Machinery.
  47
  48 dirvars                  =
  49 dirtargets               =
  50 ALL_SUBDIRS             :=
  51 D                       :=
  52 %dirstack               :=
  53
  54 dirvars                 += TARGETS PROGRAMS LIBS CLEANFILES
  55 dirtargets              += all clean check install
  56
  57 define %descend-subdir
  58   %dirstack             := $$D $$(%dirstack)
  59   D                     := $$(if $$D,$$D/)$1
  60   ALL_SUBDIRS           += $$D
  61   include $$(srcdir)/$$D/Subdir.mk
  62   D                     := $$(firstword $$(dirstack))
  63   %dirstack             := $$(wordlist 2,$$(words $$(%dirstack)),$$(%dirstack))
  64 endef
  65 descend-subdirs          = $(foreach d,$1, \
  66                                 $(eval $(call %descend-subdir,$d)))
  67
  68 V                        = 0
  69 v-tag                    = $(call %v-tag.$V,$1)
  70 %v-tag.0                 = @printf "  %-8s %s\n" "$1" "$@";
  71 %v-tag.1                 =
  72
  73 V_AT                     = $(%V_AT.$V)
  74 %V_AT.0                  = @
  75 %V_AT.1                  =
  76
  77
  78
  79 ALL_DEPFILES            :=
  80 notice-objects           = $(eval ALL_DEPFILES += $$(patsubst %.o,%.d,$1))
  81
  82 ###--------------------------------------------------------------------------
  83 ### Descend into subdirectories.
  84
  85 SUBDIRS                  =
  86
  87 SUBDIRS                 += lib
  88 SUBDIRS                 += src
  89
  90 $(call descend-subdirs, $(SUBDIRS))
  91
  92 ###--------------------------------------------------------------------------
  93 ### Maintaining the build system.
  94
  95 ###--------------------------------------------------------------------------
  96 ### More machinery.
  97
  98 all_dirtargets           = $(foreach d,$(ALL_SUBDIRS), \
  99                                 $(foreach t,$(dirtargets), $d/$t))
 100
 101 $(all_dirtargets)::
 102
 103 ifeq ($(origin SUBDIR),undefined)
 104 $(foreach t,$(dirtargets), \
 105         $(eval $t:: $(foreach d,$(ALL_SUBDIRS),$d/$t)))
 106 else
 107 $(foreach t,$(dirtargets), \
 108         $(eval $t:: $(SUBDIR)/$t))
 109 endif
 110 $(foreach d,$(SUBDIRS), \
 111         $(foreach t,$(dirtargets), \
 112                 $(eval $d/$t::)))
 113 .PHONY: $(foreach t,$(dirtargets),$t $(foreach d,$(ALL_SUBDIRS),$d/$t))
 114
 115 $(foreach d,$(ALL_SUBDIRS), $d/clean):: %/clean:
 116         rm -f $*/*.o $*/*.d $($*_CLEANFILES)
 117
 118 realclean:: clean
 119         rm -f config.status config.log
 120         rm -f Makefile $(foreach d,$(ALL_SUBDIRS), $d/Makefile)
 121
 122 -include $(ALL_DEPFILES)
 123
 124 ###----- That's all, folks --------------------------------------------------