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# ltsugar.m4 -- libtool m4 base layer.                         -*-Autoconf-*-

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#

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# Copyright (C) 2004, 2005, 2007, 2008 Free Software Foundation, Inc.

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# Written by Gary V. Vaughan, 2004

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#

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# This file is free software; the Free Software Foundation gives

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# unlimited permission to copy and/or distribute it, with or without

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# modifications, as long as this notice is preserved.

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# serial 6 ltsugar.m4

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# This is to help aclocal find these macros, as it can't see m4_define.

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AC_DEFUN([LTSUGAR_VERSION], [m4_if([0.1])])

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# lt_join(SEP, ARG1, [ARG2...])

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# -----------------------------

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# Produce ARG1SEPARG2...SEPARGn, omitting [] arguments and their

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# associated separator.

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# Needed until we can rely on m4_join from Autoconf 2.62, since all earlier

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# versions in m4sugar had bugs.

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m4_define([lt_join],

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[m4_if([$#], [1], [],

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       [$#], [2], [[$2]],

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       [m4_if([$2], [], [], [[$2]_])$0([$1], m4_shift(m4_shift($@)))])])

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m4_define([_lt_join],

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[m4_if([$#$2], [2], [],

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       [m4_if([$2], [], [], [[$1$2]])$0([$1], m4_shift(m4_shift($@)))])])

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# lt_car(LIST)

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# lt_cdr(LIST)

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# ------------

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# Manipulate m4 lists.

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# These macros are necessary as long as will still need to support

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# Autoconf-2.59 which quotes differently.

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m4_define([lt_car], [[$1]])

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m4_define([lt_cdr],

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[m4_if([$#], 0, [m4_fatal([$0: cannot be called without arguments])],

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       [$#], 1, [],

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       [m4_dquote(m4_shift($@))])])

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m4_define([lt_unquote], $1)

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# lt_append(MACRO-NAME, STRING, [SEPARATOR])

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# ------------------------------------------

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# Redefine MACRO-NAME to hold its former content plus `SEPARATOR'`STRING'.

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# Note that neither SEPARATOR nor STRING are expanded; they are appended

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# to MACRO-NAME as is (leaving the expansion for when MACRO-NAME is invoked).

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# No SEPARATOR is output if MACRO-NAME was previously undefined (different

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# than defined and empty).

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#

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# This macro is needed until we can rely on Autoconf 2.62, since earlier

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# versions of m4sugar mistakenly expanded SEPARATOR but not STRING.

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m4_define([lt_append],

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[m4_define([$1],

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	   m4_ifdef([$1], [m4_defn([$1])[$3]])[$2])])

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# lt_combine(SEP, PREFIX-LIST, INFIX, SUFFIX1, [SUFFIX2...])

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# ----------------------------------------------------------

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# Produce a SEP delimited list of all paired combinations of elements of

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# PREFIX-LIST with SUFFIX1 through SUFFIXn.  Each element of the list

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# has the form PREFIXmINFIXSUFFIXn.

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# Needed until we can rely on m4_combine added in Autoconf 2.62.

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m4_define([lt_combine],

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[m4_if(m4_eval([$# > 3]), [1],

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       [m4_pushdef([_Lt_sep], [m4_define([_Lt_sep], m4_defn([lt_car]))])]]dnl

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[[m4_foreach([_Lt_prefix], [$2],

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	     [m4_foreach([_Lt_suffix],

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		]m4_dquote(m4_dquote(m4_shift(m4_shift(m4_shift($@)))))[,

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	[_Lt_sep([$1])[]m4_defn([_Lt_prefix])[$3]m4_defn([_Lt_suffix])])])])])

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# lt_if_append_uniq(MACRO-NAME, VARNAME, [SEPARATOR], [UNIQ], [NOT-UNIQ])

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# -----------------------------------------------------------------------

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# Iff MACRO-NAME does not yet contain VARNAME, then append it (delimited

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# by SEPARATOR if supplied) and expand UNIQ, else NOT-UNIQ.

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m4_define([lt_if_append_uniq],

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[m4_ifdef([$1],

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	  [m4_if(m4_index([$3]m4_defn([$1])[$3], [$3$2$3]), [-1],

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		 [lt_append([$1], [$2], [$3])$4],

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		 [$5])],

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	  [lt_append([$1], [$2], [$3])$4])])

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# lt_dict_add(DICT, KEY, VALUE)

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# -----------------------------

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m4_define([lt_dict_add],

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[m4_define([$1($2)], [$3])])

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# lt_dict_add_subkey(DICT, KEY, SUBKEY, VALUE)

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# --------------------------------------------

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m4_define([lt_dict_add_subkey],

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[m4_define([$1($2:$3)], [$4])])

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# lt_dict_fetch(DICT, KEY, [SUBKEY])

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# ----------------------------------

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m4_define([lt_dict_fetch],

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[m4_ifval([$3],

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	m4_ifdef([$1($2:$3)], [m4_defn([$1($2:$3)])]),

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    m4_ifdef([$1($2)], [m4_defn([$1($2)])]))])

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# lt_if_dict_fetch(DICT, KEY, [SUBKEY], VALUE, IF-TRUE, [IF-FALSE])

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# -----------------------------------------------------------------

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m4_define([lt_if_dict_fetch],

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[m4_if(lt_dict_fetch([$1], [$2], [$3]), [$4],

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	[$5],

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    [$6])])

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# lt_dict_filter(DICT, [SUBKEY], VALUE, [SEPARATOR], KEY, [...])

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# --------------------------------------------------------------

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m4_define([lt_dict_filter],

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[m4_if([$5], [], [],

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  [lt_join(m4_quote(m4_default([$4], [[, ]])),

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           lt_unquote(m4_split(m4_normalize(m4_foreach(_Lt_key, lt_car([m4_shiftn(4, $@)]),

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		      [lt_if_dict_fetch([$1], _Lt_key, [$2], [$3], [_Lt_key ])])))))])[]dnl

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])