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  ])