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  1. # ltsugar.m4 -- libtool m4 base layer.                         -*-Autoconf-*-
  2. #
  3. # Copyright (C) 2004-2005, 2007-2008, 2011-2015 Free Software
  4. # Foundation, Inc.
  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
  37. # Autoconf-2.59, which quotes differently.
  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. # ------------------------------------------
  48. # Redefine MACRO-NAME to hold its former content plus 'SEPARATOR''STRING'.
  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. ])
  125.