libseccomp/m4/ltsugar.m4

   1 # ltsugar.m4 -- libtool m4 base layer.                         -*-Autoconf-*-
   2 #
   3 # Copyright (C) 2004-2005, 2007-2008, 2011-2015 Free Software
   4 # 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 ])