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Annotation of embedaddon/confuse/m4/ltsugar.m4, revision 1.1.1.2

1.1       misho       1: # ltsugar.m4 -- libtool m4 base layer.                         -*-Autoconf-*-
                      2: #
1.1.1.2 ! misho       3: # Copyright (C) 2004-2005, 2007-2008, 2011-2015 Free Software
        !             4: # Foundation, Inc.
1.1       misho       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.
                     14: AC_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.
                     23: m4_define([lt_join],
                     24: [m4_if([$#], [1], [],
                     25:        [$#], [2], [[$2]],
                     26:        [m4_if([$2], [], [], [[$2]_])$0([$1], m4_shift(m4_shift($@)))])])
                     27: m4_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
1.1.1.2 ! misho      37: # Autoconf-2.59, which quotes differently.
1.1       misho      38: m4_define([lt_car], [[$1]])
                     39: m4_define([lt_cdr],
                     40: [m4_if([$#], 0, [m4_fatal([$0: cannot be called without arguments])],
                     41:        [$#], 1, [],
                     42:        [m4_dquote(m4_shift($@))])])
                     43: m4_define([lt_unquote], $1)
                     44: 
                     45: 
                     46: # lt_append(MACRO-NAME, STRING, [SEPARATOR])
                     47: # ------------------------------------------
1.1.1.2 ! misho      48: # Redefine MACRO-NAME to hold its former content plus 'SEPARATOR''STRING'.
1.1       misho      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.
                     56: m4_define([lt_append],
                     57: [m4_define([$1],
                     58:           m4_ifdef([$1], [m4_defn([$1])[$3]])[$2])])
                     59: 
                     60: 
                     61: 
                     62: # lt_combine(SEP, PREFIX-LIST, INFIX, SUFFIX1, [SUFFIX2...])
                     63: # ----------------------------------------------------------
                     64: # Produce a SEP delimited list of all paired combinations of elements of
                     65: # PREFIX-LIST with SUFFIX1 through SUFFIXn.  Each element of the list
                     66: # has the form PREFIXmINFIXSUFFIXn.
                     67: # Needed until we can rely on m4_combine added in Autoconf 2.62.
                     68: m4_define([lt_combine],
                     69: [m4_if(m4_eval([$# > 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.
                     81: m4_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: # -----------------------------
                     91: m4_define([lt_dict_add],
                     92: [m4_define([$1($2)], [$3])])
                     93: 
                     94: 
                     95: # lt_dict_add_subkey(DICT, KEY, SUBKEY, VALUE)
                     96: # --------------------------------------------
                     97: m4_define([lt_dict_add_subkey],
                     98: [m4_define([$1($2:$3)], [$4])])
                     99: 
                    100: 
                    101: # lt_dict_fetch(DICT, KEY, [SUBKEY])
                    102: # ----------------------------------
                    103: m4_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: # -----------------------------------------------------------------
                    111: m4_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: # --------------------------------------------------------------
                    119: m4_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: ])