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author Adam Chlipala <adam@chlipala.net>
date Tue, 11 Jan 2011 10:31:48 -0500
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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 ])