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.
 14AC_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.
 23m4_define([lt_join],
 24[m4_if([$#], [1], [],
 25       [$#], [2], [[$2]],
 26       [m4_if([$2], [], [], [[$2]_])$0([$1], m4_shift(m4_shift($@)))])])
 27m4_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.
 38m4_define([lt_car], [[$1]])
 39m4_define([lt_cdr],
 40[m4_if([$#], 0, [m4_fatal([$0: cannot be called without arguments])],
 41       [$#], 1, [],
 42       [m4_dquote(m4_shift($@))])])
 43m4_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.
 56m4_define([lt_append],
 57[m4_define([$1],
 58	   m4_ifdef([$1], [m4_defn([$1])[$3]])[$2])])
 59
 60
 61
 62# lt_combine(SEP, PREFIX-LIST, INFIX, SUFFIX1, [SUFFIX2...])
 63# ----------------------------------------------------------
 64# Produce a SEP delimited list of all paired combinations of elements of
 65# PREFIX-LIST with SUFFIX1 through SUFFIXn.  Each element of the list
 66# has the form PREFIXmINFIXSUFFIXn.
 67# Needed until we can rely on m4_combine added in Autoconf 2.62.
 68m4_define([lt_combine],
 69[m4_if(m4_eval([$# > 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.
 81m4_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# -----------------------------
 91m4_define([lt_dict_add],
 92[m4_define([$1($2)], [$3])])
 93
 94
 95# lt_dict_add_subkey(DICT, KEY, SUBKEY, VALUE)
 96# --------------------------------------------
 97m4_define([lt_dict_add_subkey],
 98[m4_define([$1($2:$3)], [$4])])
 99
100
101# lt_dict_fetch(DICT, KEY, [SUBKEY])
102# ----------------------------------
103m4_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# -----------------------------------------------------------------
111m4_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# --------------------------------------------------------------
119m4_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])