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

#

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

# Written by Gary V. Vaughan, 2004

#

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

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

# modifications, as long as this notice is preserved.

# serial 6 ltsugar.m4

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

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

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

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

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

# associated separator.

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

# versions in m4sugar had bugs.

m4_define([lt_join],

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

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

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

m4_define([_lt_join],

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

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

# lt_car(LIST)

# lt_cdr(LIST)

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

# Manipulate m4 lists.

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

# Autoconf-2.59 which quotes differently.

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

m4_define([lt_cdr],

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

       [$#], 1, [],

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

m4_define([lt_unquote], $1)

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

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

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

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

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

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

# than defined and empty).

#

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

# versions of m4sugar mistakenly expanded SEPARATOR but not STRING.

m4_define([lt_append],

[m4_define([$1],

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

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

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

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

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

# has the form PREFIXmINFIXSUFFIXn.

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

m4_define([lt_combine],

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

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

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

             [m4_foreach([_Lt_suffix],

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

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

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

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

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

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

m4_define([lt_if_append_uniq],

[m4_ifdef([$1],

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

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

                 [$5])],

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

# lt_dict_add(DICT, KEY, VALUE)

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

m4_define([lt_dict_add],

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

# lt_dict_add_subkey(DICT, KEY, SUBKEY, VALUE)

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

m4_define([lt_dict_add_subkey],

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

# lt_dict_fetch(DICT, KEY, [SUBKEY])

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

m4_define([lt_dict_fetch],

[m4_ifval([$3],

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

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

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

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

m4_define([lt_if_dict_fetch],

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

        [$5],

    [$6])])

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

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

m4_define([lt_dict_filter],

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

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

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

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

])