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annotate m4/ltsugar.m4 @ 7:05a28a77f6fe

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author Adam Chlipala <adam@chlipala.net>
date Thu, 10 Mar 2011 18:36:50 -0500
parents ad85b8813e8a
children
rev   line source
adam@0 1 # ltsugar.m4 -- libtool m4 base layer. -*-Autoconf-*-
adam@0 2 #
adam@0 3 # Copyright (C) 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
adam@0 4 # Written by Gary V. Vaughan, 2004
adam@0 5 #
adam@0 6 # This file is free software; the Free Software Foundation gives
adam@0 7 # unlimited permission to copy and/or distribute it, with or without
adam@0 8 # modifications, as long as this notice is preserved.
adam@0 9
adam@0 10 # serial 6 ltsugar.m4
adam@0 11
adam@0 12 # This is to help aclocal find these macros, as it can't see m4_define.
adam@0 13 AC_DEFUN([LTSUGAR_VERSION], [m4_if([0.1])])
adam@0 14
adam@0 15
adam@0 16 # lt_join(SEP, ARG1, [ARG2...])
adam@0 17 # -----------------------------
adam@0 18 # Produce ARG1SEPARG2...SEPARGn, omitting [] arguments and their
adam@0 19 # associated separator.
adam@0 20 # Needed until we can rely on m4_join from Autoconf 2.62, since all earlier
adam@0 21 # versions in m4sugar had bugs.
adam@0 22 m4_define([lt_join],
adam@0 23 [m4_if([$#], [1], [],
adam@0 24 [$#], [2], [[$2]],
adam@0 25 [m4_if([$2], [], [], [[$2]_])$0([$1], m4_shift(m4_shift($@)))])])
adam@0 26 m4_define([_lt_join],
adam@0 27 [m4_if([$#$2], [2], [],
adam@0 28 [m4_if([$2], [], [], [[$1$2]])$0([$1], m4_shift(m4_shift($@)))])])
adam@0 29
adam@0 30
adam@0 31 # lt_car(LIST)
adam@0 32 # lt_cdr(LIST)
adam@0 33 # ------------
adam@0 34 # Manipulate m4 lists.
adam@0 35 # These macros are necessary as long as will still need to support
adam@0 36 # Autoconf-2.59 which quotes differently.
adam@0 37 m4_define([lt_car], [[$1]])
adam@0 38 m4_define([lt_cdr],
adam@0 39 [m4_if([$#], 0, [m4_fatal([$0: cannot be called without arguments])],
adam@0 40 [$#], 1, [],
adam@0 41 [m4_dquote(m4_shift($@))])])
adam@0 42 m4_define([lt_unquote], $1)
adam@0 43
adam@0 44
adam@0 45 # lt_append(MACRO-NAME, STRING, [SEPARATOR])
adam@0 46 # ------------------------------------------
adam@0 47 # Redefine MACRO-NAME to hold its former content plus `SEPARATOR'`STRING'.
adam@0 48 # Note that neither SEPARATOR nor STRING are expanded; they are appended
adam@0 49 # to MACRO-NAME as is (leaving the expansion for when MACRO-NAME is invoked).
adam@0 50 # No SEPARATOR is output if MACRO-NAME was previously undefined (different
adam@0 51 # than defined and empty).
adam@0 52 #
adam@0 53 # This macro is needed until we can rely on Autoconf 2.62, since earlier
adam@0 54 # versions of m4sugar mistakenly expanded SEPARATOR but not STRING.
adam@0 55 m4_define([lt_append],
adam@0 56 [m4_define([$1],
adam@0 57 m4_ifdef([$1], [m4_defn([$1])[$3]])[$2])])
adam@0 58
adam@0 59
adam@0 60
adam@0 61 # lt_combine(SEP, PREFIX-LIST, INFIX, SUFFIX1, [SUFFIX2...])
adam@0 62 # ----------------------------------------------------------
adam@0 63 # Produce a SEP delimited list of all paired combinations of elements of
adam@0 64 # PREFIX-LIST with SUFFIX1 through SUFFIXn. Each element of the list
adam@0 65 # has the form PREFIXmINFIXSUFFIXn.
adam@0 66 # Needed until we can rely on m4_combine added in Autoconf 2.62.
adam@0 67 m4_define([lt_combine],
adam@0 68 [m4_if(m4_eval([$# > 3]), [1],
adam@0 69 [m4_pushdef([_Lt_sep], [m4_define([_Lt_sep], m4_defn([lt_car]))])]]dnl
adam@0 70 [[m4_foreach([_Lt_prefix], [$2],
adam@0 71 [m4_foreach([_Lt_suffix],
adam@0 72 ]m4_dquote(m4_dquote(m4_shift(m4_shift(m4_shift($@)))))[,
adam@0 73 [_Lt_sep([$1])[]m4_defn([_Lt_prefix])[$3]m4_defn([_Lt_suffix])])])])])
adam@0 74
adam@0 75
adam@0 76 # lt_if_append_uniq(MACRO-NAME, VARNAME, [SEPARATOR], [UNIQ], [NOT-UNIQ])
adam@0 77 # -----------------------------------------------------------------------
adam@0 78 # Iff MACRO-NAME does not yet contain VARNAME, then append it (delimited
adam@0 79 # by SEPARATOR if supplied) and expand UNIQ, else NOT-UNIQ.
adam@0 80 m4_define([lt_if_append_uniq],
adam@0 81 [m4_ifdef([$1],
adam@0 82 [m4_if(m4_index([$3]m4_defn([$1])[$3], [$3$2$3]), [-1],
adam@0 83 [lt_append([$1], [$2], [$3])$4],
adam@0 84 [$5])],
adam@0 85 [lt_append([$1], [$2], [$3])$4])])
adam@0 86
adam@0 87
adam@0 88 # lt_dict_add(DICT, KEY, VALUE)
adam@0 89 # -----------------------------
adam@0 90 m4_define([lt_dict_add],
adam@0 91 [m4_define([$1($2)], [$3])])
adam@0 92
adam@0 93
adam@0 94 # lt_dict_add_subkey(DICT, KEY, SUBKEY, VALUE)
adam@0 95 # --------------------------------------------
adam@0 96 m4_define([lt_dict_add_subkey],
adam@0 97 [m4_define([$1($2:$3)], [$4])])
adam@0 98
adam@0 99
adam@0 100 # lt_dict_fetch(DICT, KEY, [SUBKEY])
adam@0 101 # ----------------------------------
adam@0 102 m4_define([lt_dict_fetch],
adam@0 103 [m4_ifval([$3],
adam@0 104 m4_ifdef([$1($2:$3)], [m4_defn([$1($2:$3)])]),
adam@0 105 m4_ifdef([$1($2)], [m4_defn([$1($2)])]))])
adam@0 106
adam@0 107
adam@0 108 # lt_if_dict_fetch(DICT, KEY, [SUBKEY], VALUE, IF-TRUE, [IF-FALSE])
adam@0 109 # -----------------------------------------------------------------
adam@0 110 m4_define([lt_if_dict_fetch],
adam@0 111 [m4_if(lt_dict_fetch([$1], [$2], [$3]), [$4],
adam@0 112 [$5],
adam@0 113 [$6])])
adam@0 114
adam@0 115
adam@0 116 # lt_dict_filter(DICT, [SUBKEY], VALUE, [SEPARATOR], KEY, [...])
adam@0 117 # --------------------------------------------------------------
adam@0 118 m4_define([lt_dict_filter],
adam@0 119 [m4_if([$5], [], [],
adam@0 120 [lt_join(m4_quote(m4_default([$4], [[, ]])),
adam@0 121 lt_unquote(m4_split(m4_normalize(m4_foreach(_Lt_key, lt_car([m4_shiftn(4, $@)]),
adam@0 122 [lt_if_dict_fetch([$1], _Lt_key, [$2], [$3], [_Lt_key ])])))))])[]dnl
adam@0 123 ])