Makefile

   1 # Makefile - POSIX Makefile for TopGit
   2 # Copyright (C) 2017 Kyle J. McKay
   3 # All rights reserved
   4 # License GPL2
   5
   6 # Makefile drives the process
   7 # Makefile.sh provides POSIX sh support
   8 # Makefile.mak does the actual building
   9 # Makefile.mt always exists and is always empty (i.e. zero length)
  10
  11 .POSIX:
  12
  13 # Anything explicitly listed here will always avoid a bogus "up to date" result
  14 TARGETS = \
  15         all clean tg awk hooks helpers doc html \
  16         precheck TG-BUILD-SETTINGS \
  17         install install-doc install-html \
  18         tg--awksome tg-tg.txt topgit.html \
  19         shell_compatibility_test \
  20         bin-wrappers/tg \
  21         test \
  22 #TARGETS
  23
  24 __default_target__: __file_which_should_not_exist
  25         +@set -- && set -ae && . ./Makefile.sh && $(MAKE) -f Makefile.mak
  26
  27 .DEFAULT:
  28         +@set -- "$@" && set -ae && . ./Makefile.sh && $(MAKE) -f Makefile.mak "$@"
  29
  30 __any_target__ $(TARGETS): __file_which_should_not_exist
  31         +@set -- "$@" && set -ae && . ./Makefile.sh && $(MAKE) -f Makefile.mak "$@"
  32
  33 # Very important rule to avoid "accidents" caused by Makefile.sh's existence
  34 # Some ridiculous "make" implementations will always implicitly "make Makefile"
  35 # even though .POSIX: has been specified and that's definately NOT POSIX!
  36 Makefile:
  37         @true
  38
  39 .PRECIOUS:
  40
  41 # Clean out the standard six single suffix inference rules
  42 # Except for .sh (because it would then elicit a redefiniton warning)
  43 .SUFFIXES: .c .sh .f .c˜ .sh˜ .f˜
  44 .c:;
  45 .f:;
  46 #.sh:;
  47 .c~:;
  48 .f~:;
  49 .sh~:;
  50 .SUFFIXES: .sh .awk .txt .html
  51
  52 # These are imperfect because they don't really reflect the correct dependencies
  53 # Running the default "make" or "make all" will always get it right, but when
  54 # trying to make a specific target, these will often avoid the "up to date"
  55 # output that would otherwise occur for existing files with no dependencies
  56 .sh:
  57         +@set -- "$@" && set -ae && . ./Makefile.sh && $(MAKE) -f Makefile.mak "$@"
  58 .awk:
  59         +@set -- "$@" && set -ae && . ./Makefile.sh && $(MAKE) -f Makefile.mak "$@"
  60 .sh.txt:
  61         +@set -- "$@" && set -ae && . ./Makefile.sh && $(MAKE) -f Makefile.mak "$@"
  62 .sh.html:
  63         +@set -- "$@" && set -ae && . ./Makefile.sh && $(MAKE) -f Makefile.mak "$@"
  64
  65 # This "phony" target must have at least one command otherwise it will not
  66 # actually run anything and so will not actually trigger the rules that depend
  67 # on it to run either.  By using "true" instead of ":" "makes" that
  68 # short-circuit directly to execvp should be able to run "true" directly.
  69 __file_which_should_not_exist:
  70         -@true