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Annotation of embedaddon/libxml2/m4/ltsugar.m4, revision 1.1.1.1

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