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1# ltsugar.m4 -- libtool m4 base layer. -*-Autoconf-*-
2#
3# Copyright (C) 2004, 2005 Free Software Foundation, Inc.
4# Written by Gary V. Vaughan.
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 3 ltsugar.m4
11
12# This is to help aclocal find these macros, as it can't see m4_define.
13AC_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.
20m4_define([lt_join],
21[m4_case([$#],
22 [0], [m4_fatal([$0: too few arguments: $#])],
23 [1], [],
24 [2], [[$2]],
25 [m4_ifval([$2],
26 [[$2][]m4_foreach(_lt_Arg, lt_car([m4_shiftn(2, $@)]),
27 [_$0([$1], _lt_Arg)])],
28 [$0([$1], m4_shiftn(2, $@))])])[]dnl
29])
30m4_define([_lt_join],
31[m4_ifval([$2],[$1][$2])[]dnl
32])
33
34
35# lt_car(LIST)
36# lt_cdr(LIST)
37# ------------
38# Manipulate m4 lists.
39# These macros are necessary as long as will still need to support
40# Autoconf-2.59 which quotes differently.
41m4_define([lt_car], [[$1]])
42m4_define([lt_cdr],
43[m4_if([$#], 0, [m4_fatal([$0: cannot be called without arguments])],
44 [$#], 1, [],
45 [m4_dquote(m4_shift($@))])])
46m4_define([lt_unquote], $1)
47
48
49# lt_combine(SEP, PREFIX-LIST, INFIX, SUFFIX1, [SUFFIX2...])
50# ----------------------------------------------------------
51# Produce a SEP delimited list of all paired combinations of elements of
52# PREFIX-LIST with SUFFIX1 through SUFFIXn. Each element of the list
53# has the form PREFIXmINFIXSUFFIXn.
54m4_define([lt_combine],
55[m4_if([$2], [], [],
56 [m4_if([$4], [], [],
57 [lt_join(m4_quote(m4_default([$1], [[, ]])),
58 lt_unquote(m4_split(m4_normalize(m4_foreach(_Lt_prefix, [$2],
59 [m4_foreach(_Lt_suffix, lt_car([m4_shiftn(3, $@)]),
60 [_Lt_prefix[]$3[]_Lt_suffix ])])))))])])dnl
61])
62
63
64# lt_if_append_uniq(MACRO-NAME, VARNAME, [SEPARATOR], [UNIQ], [NOT-UNIQ])
65# -----------------------------------------------------------------------
66# Iff MACRO-NAME does not yet contain VARNAME, then append it (delimited
67# by SEPARATOR if supplied) and expand UNIQ, else NOT-UNIQ.
68m4_define([lt_if_append_uniq],
69[m4_ifdef([$1],
70 [m4_bmatch($3[]m4_defn([$1])$3, $3[]m4_re_escape([$2])$3,
71 [$5],
72 [m4_append([$1], [$2], [$3])$4])],
73 [m4_append([$1], [$2], [$3])$4])])
74
75
76# lt_dict_add(DICT, KEY, VALUE)
77# -----------------------------
78m4_define([lt_dict_add],
79[m4_define([$1($2)], [$4])])
80
81
82# lt_dict_add_subkey(DICT, KEY, SUBKEY, VALUE)
83# --------------------------------------------
84m4_define([lt_dict_add_subkey],
85[m4_define([$1($2:$3)], [$4])])
86
87
88# lt_dict_fetch(DICT, KEY, [SUBKEY])
89# ----------------------------------
90m4_define([lt_dict_fetch],
91[m4_ifval([$3],
92 m4_ifdef([$1($2:$3)], [m4_defn([$1($2:$3)])]),
93 m4_ifdef([$1($2)], [m4_defn([$1($2)])]))])
94
95
96# lt_if_dict_fetch(DICT, KEY, [SUBKEY], VALUE, IF-TRUE, [IF-FALSE])
97# -----------------------------------------------------------------
98m4_define([lt_if_dict_fetch],
99[m4_if(lt_dict_fetch([$1], [$2], [$3]), [$4],
100 [$5],
101 [$6])])
102
103
104# lt_dict_filter(DICT, [SUBKEY], VALUE, [SEPARATOR], KEY, [...])
105# --------------------------------------------------------------
106m4_define([lt_dict_filter],
107[m4_if([$5], [], [],
108 [lt_join(m4_quote(m4_default([$4], [[, ]])),
109 lt_unquote(m4_split(m4_normalize(m4_foreach(_Lt_key, lt_car([m4_shiftn(4, $@)]),
110 [lt_if_dict_fetch([$1], _Lt_key, [$2], [$3], [_Lt_key ])])))))])[]dnl
111])