makefile

   1 # makefile -- redirect "make" command to version specific make
   2 # Copyright (C) 2015 Kyle J. McKay.  All rights reserved.
   3 #
   4 # Redistribution and use in source and binary forms, with or without
   5 # modification, are permitted provided that the following conditions are met:
   6 #
   7 # 1. Redistributions of source code must retain the above copyright notice,
   8 #    this list of conditions and the following disclaimer.
   9 #
  10 # 2. Redistributions in binary form must reproduce the above copyright notice,
  11 #    this list of conditions and the following disclaimer in the documentation
  12 #    and/or other materials provided with the distribution.
  13 #
  14 # 3. Neither the name of the copyright holder nor the names of its contributors
  15 #    may be used to endorse or promote products derived from this software
  16 #    without specific prior written permission.
  17 #
  18 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  19 # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21 # ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  22 # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23 # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24 # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25 # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26 # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28 # POSSIBILITY OF SUCH DAMAGE.
  29 #
  30 #
  31 # Note that .POSIX must be the first non-comment line and
  32 # also that the behavior of blank lines is unspecified
  33 .POSIX:
  34 #
  35 # Set MAKEFILE__NAME to the version-specific file name that "make" would
  36 # read instead of this file if the correct version of "make" had been run.
  37 # For GNU make use "GNUmakefile" and for BSD make use "BSDmakefile".
  38 # For kmk use either "Makefile.kmk" or "makefile.kmk"
  39 MAKEFILE__NAME = GNUmakefile
  40 #
  41 # Set MAKE__COMMAND__NAME to the typical name of the version-specific "make"
  42 # command that was intended to be run when it's not available as "make".
  43 # For GNU make this is typically "gmake" and for BSD make typically "bsdmake".
  44 # For kmk this should be "kmk".
  45 MAKE__COMMAND__NAME = gmake
  46 #
  47 # Note that when we run $(MAKE__COMMAND__NAME) we do not need to pass on any
  48 # "make" options as a POSIX "make" will have put them in MAKEFLAGS for us
  49 # and $(MAKE__COMMAND__NAME) will pick them up from there.
  50 #
  51 # In case any of the other targets are not recognized as special, the default
  52 # target must be the first target and it depends on a file that should not exist
  53 # just in case .PHONY is not supported by the "make" that's reading this file.
  54 # This rule will be used if no targets are specified on the command line.  We
  55 # must not name it "all" because we do not pass the target name on in this case
  56 # -- that is handled by the .DEFAULT rule.
  57 __makefile_compatibility_wrapper__: __file_which_should_not_exist
  58         +@test -r "$(MAKEFILE__NAME)" || \
  59         { echo error: missing $(MAKEFILE__NAME); exit 1; }
  60         +@$(MAKE__COMMAND__NAME)
  61 #
  62 # Turn off parallel mode on "make"s that support it
  63 # Other "makes" will treat these as normal rules
  64 .NOTPARALLEL:
  65 .NO_PARALLEL:
  66 #
  67 # Ensure that there are no built-in rules to interfere
  68 # with using our .DEFAULT rule
  69 .SUFFIXES:
  70 #
  71 # This rule will be used if any targets are specified
  72 .DEFAULT:
  73         +@test -r "$(MAKEFILE__NAME)" || \
  74         { echo error: missing $(MAKEFILE__NAME); exit 1; }
  75         +@$(MAKE__COMMAND__NAME) $@
  76 #
  77 # Mark "__file_which_should_not_exist" as a phony target
  78 # for "make"s which support phony targets
  79 .PHONY: __file_which_should_not_exist
  80 #
  81 # In case .PHONY is not supported we need an explicit
  82 # rule for this to make sure the .DEFAULT rule is not used
  83 # and we end it with ; to make it clear it has no commands
  84 __file_which_should_not_exist: ;