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      1 # ltsugar.m4 -- libtool m4 base layer.                         -*-Autoconf-*-
      2 #
      3 #   Copyright (C) 2004, 2005, 2007 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 5 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 m4_define([lt_combine],
     67 [m4_if([$2], [], [],
     68   [m4_if([$4], [], [],
     69     [lt_join(m4_quote(m4_default([$1], [[, ]])),
     70       lt_unquote(m4_split(m4_normalize(m4_foreach(_Lt_prefix, [$2],
     71 		   [m4_foreach(_Lt_suffix, lt_car([m4_shiftn(3, $@)]),
     72 			       [_Lt_prefix[]$3[]_Lt_suffix ])])))))])])dnl
     73 ])
     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 ])
    124