share/mk/links.mk

   1 # $Id: links.mk,v 1.6 2014/09/29 17:14:40 sjg Exp $
   2 #
   3 #       @(#) Copyright (c) 2005, Simon J. Gerraty
   4 #
   5 #       This file is provided in the hope that it will
   6 #       be of use.  There is absolutely NO WARRANTY.
   7 #       Permission to copy, redistribute or otherwise
   8 #       use this file is hereby granted provided that
   9 #       the above copyright notice and this notice are
  10 #       left intact.
  11 #
  12 #       Please send copies of changes and bug-fixes to:
  13 #       sjg@crufty.net
  14 #
  15
  16 # some platforms need something special
  17 LN?= ln
  18 ECHO?= echo
  19
  20 LINKS?=
  21 SYMLINKS?=
  22
  23 __SYMLINK_SCRIPT= \
  24                 ${ECHO} "$$t -> $$l"; \
  25                 case `'ls' -l $$t 2> /dev/null` in \
  26                 *"> $$l") ;; \
  27                 *) \
  28                         mkdir -p `dirname $$t`; \
  29                         rm -f $$t; \
  30                         ${LN} -s $$l $$t;; \
  31                 esac
  32
  33
  34 __LINK_SCRIPT= \
  35                 ${ECHO} "$$t -> $$l"; \
  36                 mkdir -p `dirname $$t`; \
  37                 rm -f $$t; \
  38                 ${LN} $$l $$t
  39
  40 _SYMLINKS_SCRIPT= \
  41         while test $$\# -ge 2; do \
  42                 l=$$1; shift; \
  43                 t=${DESTDIR}$$1; shift; \
  44                 ${__SYMLINK_SCRIPT}; \
  45         done; :;
  46
  47 _LINKS_SCRIPT= \
  48         while test $$\# -ge 2; do \
  49                 l=${DESTDIR}$$1; shift; \
  50                 t=${DESTDIR}$$1; shift; \
  51                 ${__LINK_SCRIPT}; \
  52         done; :;
  53
  54 _SYMLINKS_USE:  .USE
  55         @set ${$@_SYMLINKS:U${SYMLINKS}}; ${_SYMLINKS_SCRIPT}
  56
  57 _LINKS_USE:     .USE
  58         @set ${$@_LINKS:U${LINKS}}; ${_LINKS_SCRIPT}
  59
  60
  61 # sometimes we want to ensure DESTDIR is ignored
  62 _BUILD_SYMLINKS_SCRIPT= \
  63         while test $$\# -ge 2; do \
  64                 l=$$1; shift; \
  65                 t=$$1; shift; \
  66                 ${__SYMLINK_SCRIPT}; \
  67         done; :;
  68
  69 _BUILD_LINKS_SCRIPT= \
  70         while test $$\# -ge 2; do \
  71                 l=$$1; shift; \
  72                 t=$$1; shift; \
  73                 ${__LINK_SCRIPT}; \
  74         done; :;
  75
  76 _BUILD_SYMLINKS_USE:    .USE
  77         @set ${$@_SYMLINKS:U${SYMLINKS}}; ${_BUILD_SYMLINKS_SCRIPT}
  78
  79 _BUILD_LINKS_USE:       .USE
  80         @set ${$@_LINKS:U${LINKS}}; ${_BUILD_LINKS_SCRIPT}