acinclude/ltsugar.m4
changeset 3342 3da232c5980a
child 6442 2d3caa191dc4
equal deleted inserted replaced
3341:710139a1692d 3342:3da232c5980a
       
     1 ##############################################################################
       
     2 # ltsugar.m4 -- libtool m4 base layer.                         -*-Autoconf-*-
       
     3 #
       
     4 # Copyright (C) 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
       
     5 # Written by Gary V. Vaughan, 2004
       
     6 #
       
     7 # This file is free software; the Free Software Foundation gives
       
     8 # unlimited permission to copy and/or distribute it, with or without
       
     9 # modifications, as long as this notice is preserved.
       
    10 
       
    11 # serial 6 ltsugar.m4
       
    12 
       
    13 # This is to help aclocal find these macros, as it can't see m4_define.
       
    14 AC_DEFUN([LTSUGAR_VERSION], [m4_if([0.1])])
       
    15 
       
    16 
       
    17 # lt_join(SEP, ARG1, [ARG2...])
       
    18 # -----------------------------
       
    19 # Produce ARG1SEPARG2...SEPARGn, omitting [] arguments and their
       
    20 # associated separator.
       
    21 # Needed until we can rely on m4_join from Autoconf 2.62, since all earlier
       
    22 # versions in m4sugar had bugs.
       
    23 m4_define([lt_join],
       
    24 [m4_if([$#], [1], [],
       
    25        [$#], [2], [[$2]],
       
    26        [m4_if([$2], [], [], [[$2]_])$0([$1], m4_shift(m4_shift($@)))])])
       
    27 m4_define([_lt_join],
       
    28 [m4_if([$#$2], [2], [],
       
    29        [m4_if([$2], [], [], [[$1$2]])$0([$1], m4_shift(m4_shift($@)))])])
       
    30 
       
    31 
       
    32 # lt_car(LIST)
       
    33 # lt_cdr(LIST)
       
    34 # ------------
       
    35 # Manipulate m4 lists.
       
    36 # These macros are necessary as long as will still need to support
       
    37 # Autoconf-2.59 which quotes differently.
       
    38 m4_define([lt_car], [[$1]])
       
    39 m4_define([lt_cdr],
       
    40 [m4_if([$#], 0, [m4_fatal([$0: cannot be called without arguments])],
       
    41        [$#], 1, [],
       
    42        [m4_dquote(m4_shift($@))])])
       
    43 m4_define([lt_unquote], $1)
       
    44 
       
    45 
       
    46 # lt_append(MACRO-NAME, STRING, [SEPARATOR])
       
    47 # ------------------------------------------
       
    48 # Redefine MACRO-NAME to hold its former content plus `SEPARATOR'`STRING'.
       
    49 # Note that neither SEPARATOR nor STRING are expanded; they are appended
       
    50 # to MACRO-NAME as is (leaving the expansion for when MACRO-NAME is invoked).
       
    51 # No SEPARATOR is output if MACRO-NAME was previously undefined (different
       
    52 # than defined and empty).
       
    53 #
       
    54 # This macro is needed until we can rely on Autoconf 2.62, since earlier
       
    55 # versions of m4sugar mistakenly expanded SEPARATOR but not STRING.
       
    56 m4_define([lt_append],
       
    57 [m4_define([$1],
       
    58 	   m4_ifdef([$1], [m4_defn([$1])[$3]])[$2])])
       
    59 
       
    60 
       
    61 
       
    62 # lt_combine(SEP, PREFIX-LIST, INFIX, SUFFIX1, [SUFFIX2...])
       
    63 # ----------------------------------------------------------
       
    64 # Produce a SEP delimited list of all paired combinations of elements of
       
    65 # PREFIX-LIST with SUFFIX1 through SUFFIXn.  Each element of the list
       
    66 # has the form PREFIXmINFIXSUFFIXn.
       
    67 # Needed until we can rely on m4_combine added in Autoconf 2.62.
       
    68 m4_define([lt_combine],
       
    69 [m4_if(m4_eval([$# > 3]), [1],
       
    70        [m4_pushdef([_Lt_sep], [m4_define([_Lt_sep], m4_defn([lt_car]))])]]dnl
       
    71 [[m4_foreach([_Lt_prefix], [$2],
       
    72 	     [m4_foreach([_Lt_suffix],
       
    73 		]m4_dquote(m4_dquote(m4_shift(m4_shift(m4_shift($@)))))[,
       
    74 	[_Lt_sep([$1])[]m4_defn([_Lt_prefix])[$3]m4_defn([_Lt_suffix])])])])])
       
    75 
       
    76 
       
    77 # lt_if_append_uniq(MACRO-NAME, VARNAME, [SEPARATOR], [UNIQ], [NOT-UNIQ])
       
    78 # -----------------------------------------------------------------------
       
    79 # Iff MACRO-NAME does not yet contain VARNAME, then append it (delimited
       
    80 # by SEPARATOR if supplied) and expand UNIQ, else NOT-UNIQ.
       
    81 m4_define([lt_if_append_uniq],
       
    82 [m4_ifdef([$1],
       
    83 	  [m4_if(m4_index([$3]m4_defn([$1])[$3], [$3$2$3]), [-1],
       
    84 		 [lt_append([$1], [$2], [$3])$4],
       
    85 		 [$5])],
       
    86 	  [lt_append([$1], [$2], [$3])$4])])
       
    87 
       
    88 
       
    89 # lt_dict_add(DICT, KEY, VALUE)
       
    90 # -----------------------------
       
    91 m4_define([lt_dict_add],
       
    92 [m4_define([$1($2)], [$3])])
       
    93 
       
    94 
       
    95 # lt_dict_add_subkey(DICT, KEY, SUBKEY, VALUE)
       
    96 # --------------------------------------------
       
    97 m4_define([lt_dict_add_subkey],
       
    98 [m4_define([$1($2:$3)], [$4])])
       
    99 
       
   100 
       
   101 # lt_dict_fetch(DICT, KEY, [SUBKEY])
       
   102 # ----------------------------------
       
   103 m4_define([lt_dict_fetch],
       
   104 [m4_ifval([$3],
       
   105 	m4_ifdef([$1($2:$3)], [m4_defn([$1($2:$3)])]),
       
   106     m4_ifdef([$1($2)], [m4_defn([$1($2)])]))])
       
   107 
       
   108 
       
   109 # lt_if_dict_fetch(DICT, KEY, [SUBKEY], VALUE, IF-TRUE, [IF-FALSE])
       
   110 # -----------------------------------------------------------------
       
   111 m4_define([lt_if_dict_fetch],
       
   112 [m4_if(lt_dict_fetch([$1], [$2], [$3]), [$4],
       
   113 	[$5],
       
   114     [$6])])
       
   115 
       
   116 
       
   117 # lt_dict_filter(DICT, [SUBKEY], VALUE, [SEPARATOR], KEY, [...])
       
   118 # --------------------------------------------------------------
       
   119 m4_define([lt_dict_filter],
       
   120 [m4_if([$5], [], [],
       
   121   [lt_join(m4_quote(m4_default([$4], [[, ]])),
       
   122            lt_unquote(m4_split(m4_normalize(m4_foreach(_Lt_key, lt_car([m4_shiftn(4, $@)]),
       
   123 		      [lt_if_dict_fetch([$1], _Lt_key, [$2], [$3], [_Lt_key ])])))))])[]dnl
       
   124 ])
       
   125