/libconfig-1.4.8/m4/ltsugar.m4

  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.
 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.
 20# Needed until we can rely on m4_join from Autoconf 2.62, since all earlier
 21# versions in m4sugar had bugs.
 22m4_define([lt_join],
 23[m4_if([$#], [1], [],
 24       [$#], [2], [[$2]],
 25       [m4_if([$2], [], [], [[$2]_])$0([$1], m4_shift(m4_shift($@)))])])
 26m4_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.
 37m4_define([lt_car], [[$1]])
 38m4_define([lt_cdr],
 39[m4_if([$#], 0, [m4_fatal([$0: cannot be called without arguments])],
 40       [$#], 1, [],
 41       [m4_dquote(m4_shift($@))])])
 42m4_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.
 55m4_define([lt_append],
 56[m4_define([$1],
 57	   m4_ifdef([$1], [m4_defn([$1])[$3]])[$2])])
 58
 59
 60
 61# lt_combine(SEP, PREFIX-LIST, INFIX, SUFFIX1, [SUFFIX2...])
 62# ----------------------------------------------------------
 63# Produce a SEP delimited list of all paired combinations of elements of
 64# PREFIX-LIST with SUFFIX1 through SUFFIXn.  Each element of the list
 65# has the form PREFIXmINFIXSUFFIXn.
 66# Needed until we can rely on m4_combine added in Autoconf 2.62.
 67m4_define([lt_combine],
 68[m4_if(m4_eval([$# > 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.
 80m4_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# -----------------------------
 90m4_define([lt_dict_add],
 91[m4_define([$1($2)], [$3])])
 92
 93
 94# lt_dict_add_subkey(DICT, KEY, SUBKEY, VALUE)
 95# --------------------------------------------
 96m4_define([lt_dict_add_subkey],
 97[m4_define([$1($2:$3)], [$4])])
 98
 99
100# lt_dict_fetch(DICT, KEY, [SUBKEY])
101# ----------------------------------
102m4_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# -----------------------------------------------------------------
110m4_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# --------------------------------------------------------------
118m4_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])