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    1 # ltsugar.m4 -- libtool m4 base layer.                         -*-Autoconf-*-
    2 #
    3 # Copyright (C) 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
    4 # Written by Gary V. Vaughan, 2004
    5 #
    6 # This file is free software; the Free Software Foundation gives
    7 # unlimited permission to copy and/or distribute it, with or without
    8 # modifications, as long as this notice is preserved.
    9 
   10 # serial 6 ltsugar.m4
   11 
   12 # This is to help aclocal find these macros, as it can't see m4_define.
   13 AC_DEFUN([LTSUGAR_VERSION], [m4_if([0.1])])
   14 
   15 
   16 # lt_join(SEP, ARG1, [ARG2...])
   17 # -----------------------------
   18 # Produce ARG1SEPARG2...SEPARGn, omitting [] arguments and their
   19 # associated separator.
   20 # Needed until we can rely on m4_join from Autoconf 2.62, since all earlier
   21 # versions in m4sugar had bugs.
   22 m4_define([lt_join],
   23 [m4_if([$#], [1], [],
   24        [$#], [2], [[$2]],
   25        [m4_if([$2], [], [], [[$2]_])$0([$1], m4_shift(m4_shift($@)))])])
   26 m4_define([_lt_join],
   27 [m4_if([$#$2], [2], [],
   28        [m4_if([$2], [], [], [[$1$2]])$0([$1], m4_shift(m4_shift($@)))])])
   29 
   30 
   31 # lt_car(LIST)
   32 # lt_cdr(LIST)
   33 # ------------
   34 # Manipulate m4 lists.
   35 # These macros are necessary as long as will still need to support
   36 # Autoconf-2.59 which quotes differently.
   37 m4_define([lt_car], [[$1]])
   38 m4_define([lt_cdr],
   39 [m4_if([$#], 0, [m4_fatal([$0: cannot be called without arguments])],
   40        [$#], 1, [],
   41        [m4_dquote(m4_shift($@))])])
   42 m4_define([lt_unquote], $1)
   43 
   44 
   45 # lt_append(MACRO-NAME, STRING, [SEPARATOR])
   46 # ------------------------------------------
   47 # Redefine MACRO-NAME to hold its former content plus `SEPARATOR'`STRING'.
   48 # Note that neither SEPARATOR nor STRING are expanded; they are appended
   49 # to MACRO-NAME as is (leaving the expansion for when MACRO-NAME is invoked).
   50 # No SEPARATOR is output if MACRO-NAME was previously undefined (different
   51 # than defined and empty).
   52 #
   53 # This macro is needed until we can rely on Autoconf 2.62, since earlier
   54 # versions of m4sugar mistakenly expanded SEPARATOR but not STRING.
   55 m4_define([lt_append],
   56 [m4_define([$1],
   57 	   m4_ifdef([$1], [m4_defn([$1])[$3]])[$2])])
   58 
   59 
   60 
   61 # lt_combine(SEP, PREFIX-LIST, INFIX, SUFFIX1, [SUFFIX2...])
   62 # ----------------------------------------------------------
   63 # Produce a SEP delimited list of all paired combinations of elements of
   64 # PREFIX-LIST with SUFFIX1 through SUFFIXn.  Each element of the list
   65 # has the form PREFIXmINFIXSUFFIXn.
   66 # Needed until we can rely on m4_combine added in Autoconf 2.62.
   67 m4_define([lt_combine],
   68 [m4_if(m4_eval([$# > 3]), [1],
   69        [m4_pushdef([_Lt_sep], [m4_define([_Lt_sep], m4_defn([lt_car]))])]]dnl
   70 [[m4_foreach([_Lt_prefix], [$2],
   71 	     [m4_foreach([_Lt_suffix],
   72 		]m4_dquote(m4_dquote(m4_shift(m4_shift(m4_shift($@)))))[,
   73 	[_Lt_sep([$1])[]m4_defn([_Lt_prefix])[$3]m4_defn([_Lt_suffix])])])])])
   74 
   75 
   76 # lt_if_append_uniq(MACRO-NAME, VARNAME, [SEPARATOR], [UNIQ], [NOT-UNIQ])
   77 # -----------------------------------------------------------------------
   78 # Iff MACRO-NAME does not yet contain VARNAME, then append it (delimited
   79 # by SEPARATOR if supplied) and expand UNIQ, else NOT-UNIQ.
   80 m4_define([lt_if_append_uniq],
   81 [m4_ifdef([$1],
   82 	  [m4_if(m4_index([$3]m4_defn([$1])[$3], [$3$2$3]), [-1],
   83 		 [lt_append([$1], [$2], [$3])$4],
   84 		 [$5])],
   85 	  [lt_append([$1], [$2], [$3])$4])])
   86 
   87 
   88 # lt_dict_add(DICT, KEY, VALUE)
   89 # -----------------------------
   90 m4_define([lt_dict_add],
   91 [m4_define([$1($2)], [$3])])
   92 
   93 
   94 # lt_dict_add_subkey(DICT, KEY, SUBKEY, VALUE)
   95 # --------------------------------------------
   96 m4_define([lt_dict_add_subkey],
   97 [m4_define([$1($2:$3)], [$4])])
   98 
   99 
  100 # lt_dict_fetch(DICT, KEY, [SUBKEY])
  101 # ----------------------------------
  102 m4_define([lt_dict_fetch],
  103 [m4_ifval([$3],
  104 	m4_ifdef([$1($2:$3)], [m4_defn([$1($2:$3)])]),
  105     m4_ifdef([$1($2)], [m4_defn([$1($2)])]))])
  106 
  107 
  108 # lt_if_dict_fetch(DICT, KEY, [SUBKEY], VALUE, IF-TRUE, [IF-FALSE])
  109 # -----------------------------------------------------------------
  110 m4_define([lt_if_dict_fetch],
  111 [m4_if(lt_dict_fetch([$1], [$2], [$3]), [$4],
  112 	[$5],
  113     [$6])])
  114 
  115 
  116 # lt_dict_filter(DICT, [SUBKEY], VALUE, [SEPARATOR], KEY, [...])
  117 # --------------------------------------------------------------
  118 m4_define([lt_dict_filter],
  119 [m4_if([$5], [], [],
  120   [lt_join(m4_quote(m4_default([$4], [[, ]])),
  121            lt_unquote(m4_split(m4_normalize(m4_foreach(_Lt_key, lt_car([m4_shiftn(4, $@)]),
  122 		      [lt_if_dict_fetch([$1], _Lt_key, [$2], [$3], [_Lt_key ])])))))])[]dnl
  123 ])